Mercurial > hg > nginx-site
annotate xml/en/docs/njs/njs_api.xml @ 2230:283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Thu, 30 Aug 2018 22:53:18 +0300 |
parents | e029f4bc7ede |
children | 5268c13196f2 |
rev | line source |
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1 <?xml version="1.0"?> |
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2 |
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3 <!-- |
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4 Copyright (C) Nginx, Inc. |
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5 --> |
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6 |
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7 <!DOCTYPE article SYSTEM "../../../../dtd/article.dtd"> |
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8 |
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9 <article name="njs API" |
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10 link="/en/docs/njs/njs_api.html" |
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11 lang="en" |
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12 rev="6"> |
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13 |
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14 <section id="summary"> |
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15 |
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16 <para> |
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17 <link doc="../njs_about.xml">njs</link> provides objects, methods and properties |
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18 for extending nginx functionality. |
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19 </para> |
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20 |
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21 </section> |
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22 |
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23 |
2176 | 24 <section id="core" name="Core"> |
25 | |
26 | |
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27 <section id="string" name="String"> |
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28 |
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29 <para> |
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30 There are two types of strings: |
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31 a <literal>Unicode string</literal> (default) and |
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32 a <literal>byte string</literal>. |
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33 </para> |
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34 |
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35 <para> |
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36 A <literal>Unicode string</literal> corresponds to an ECMAScript string |
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37 which contains Unicode characters. |
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38 </para> |
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39 |
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40 <para> |
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41 <literal>Byte strings</literal> contain a sequence of bytes. |
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42 They are used to serialize Unicode strings |
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43 to external data and deserialize from external sources. |
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44 For example, the <link id="string_toutf8">toUTF8()</link> method serializes |
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45 a Unicode string to a byte string using UTF8 encoding: |
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46 <example> |
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47 >> '£'.toUTF8().toString('hex') |
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48 'c2a3' /* C2 A3 is the UTF8 representation of 00A3 ('£') code point */ |
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49 </example> |
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50 The <link id="string_tobytes">toBytes()</link> method serializes |
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51 a Unicode string with code points up to 255 into a byte string, |
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52 otherwise, <literal>null</literal> is returned: |
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53 <example> |
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54 >> '£'.toBytes().toString('hex') |
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55 'a3' /* a3 is a byte equal to 00A3 ('£') code point */ |
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56 </example> |
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57 Only byte strings can be converted to different encodings. |
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58 For example, a string cannot be encoded to <literal>hex</literal> directly: |
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59 <example> |
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60 >> 'αβγδ'.toString('base64') |
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61 TypeError: argument must be a byte string |
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62 at String.prototype.toString (native) |
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63 at main (native) |
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64 </example> |
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65 To convert a Unicode string to hex, |
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66 first, it should be converted to a byte string and then to hex: |
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67 <example> |
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68 >> 'αβγδ'.toUTF8().toString('base64') |
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69 'zrHOss6zzrQ=' |
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70 </example> |
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71 |
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72 <list type="tag"> |
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73 |
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74 <tag-name id="string_bytesfrom"><literal>String.bytesFrom(<value>array</value> |
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75 | <value>string</value>, <value>encoding</value>)</literal></tag-name> |
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76 <tag-desc> |
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77 (njs specific) Creates a byte string either from an array that contains octets, |
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78 or from an encoded string (0.2.3). |
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79 The encoding can be |
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80 <literal>hex</literal>, |
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81 <literal>base64</literal>, and |
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82 <literal>base64url</literal>. |
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83 <example> |
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84 >> String.bytesFrom([0x62, 0x75, 0x66, 0x66, 0x65, 0x72]) |
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85 'buffer' |
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86 |
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87 >> String.bytesFrom('YnVmZmVy', 'base64') |
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88 'buffer' |
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89 </example> |
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90 </tag-desc> |
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91 |
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92 <tag-name><literal>String.fromCodePoint(<value>codePoint1</value>[, ...[, |
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93 <value>codePoint2</value>]])</literal></tag-name> |
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94 <tag-desc> |
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95 Returns a string from one or more Unicode code points. |
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96 <example> |
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97 >> String.fromCodePoint(97, 98, 99, 100) |
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98 'abcd' |
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99 </example> |
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100 </tag-desc> |
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101 |
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102 <tag-name><literal>String.prototype.concat(<value>string1</value>[, ..., |
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103 <value>stringN</value>])</literal></tag-name> |
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104 <tag-desc> |
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105 Returns a string that contains the concatenation of specified |
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106 <literal>strings</literal>. |
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107 <example> |
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108 >> "a".concat("b", "c") |
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109 'abc' |
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110 </example> |
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111 </tag-desc> |
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112 |
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113 <tag-name><literal>String.prototype.endsWith(<value>searchString</value>[, |
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114 <value>length</value>])</literal></tag-name> |
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115 <tag-desc> |
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116 Returns <literal>true</literal> if a string ends with the characters |
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117 of a specified string, otherwise <literal>false</literal>. |
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118 The optional <literal>length</literal> parameter is the the length of string. |
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119 If omitted, the default value is the length of the string. |
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120 <example> |
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121 >> 'abc'.endsWith('abc') |
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122 true |
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123 >> 'abca'.endsWith('abc') |
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124 false |
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125 </example> |
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126 </tag-desc> |
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127 |
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128 <tag-name><literal>String.prototype.fromBytes(<value>start</value>[, |
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129 <value>end</value>])</literal></tag-name> |
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130 <tag-desc> |
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131 (njs specific) Returns a new Unicode string from a byte string |
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132 where each byte is replaced with a corresponding Unicode code point. |
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133 </tag-desc> |
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134 |
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135 <tag-name><literal>String.prototype.fromUTF8(<value>start</value>[, |
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136 <value>end</value>])</literal></tag-name> |
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137 <tag-desc> |
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138 (njs specific) Converts a byte string containing a valid UTF8 string |
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139 into a Unicode string, |
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140 otherwise <literal>null</literal> is returned. |
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141 </tag-desc> |
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142 |
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143 <tag-name><literal>String.prototype.includes(<value>searchString</value>[, |
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144 <value>position</value>]))</literal></tag-name> |
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145 <tag-desc> |
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146 Returns <literal>true</literal> if a string is found within another string, |
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147 otherwise <literal>false</literal>. |
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148 The optional <literal>position</literal> parameter is the position |
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149 within the string at which to begin search for <literal>searchString</literal>. |
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150 Default value is 0. |
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151 <example> |
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152 >> 'abc'.includes('bc') |
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153 true |
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154 </example> |
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155 </tag-desc> |
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156 |
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157 <tag-name><literal>String.prototype.indexOf(<value>searchString</value>[, |
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158 <value>fromIndex</value>])</literal></tag-name> |
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159 <tag-desc> |
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160 Returns the position of the first occurrence |
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161 of the <literal>searchString</literal> |
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162 The search is started at <literal>fromIndex</literal>. |
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163 Returns <value>-1</value> if the value is not found. |
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164 The <literal>fromIndex</literal> is an integer, |
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165 default value is 0. |
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166 If <literal>fromIndex</literal> is lower than 0 |
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167 or greater than |
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168 <link id="string_length">String.prototype.length</link><value></value>, |
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169 the search starts at index <value>0</value> and |
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170 <value>String.prototype.length</value>. |
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171 <example> |
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172 >> 'abcdef'.indexOf('de', 2) |
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173 3 |
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174 </example> |
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175 </tag-desc> |
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176 |
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177 <tag-name><literal>String.prototype.lastIndexOf(<value>searchString</value>[, |
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178 <value>fromIndex</value>])</literal></tag-name> |
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179 <tag-desc> |
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180 Returns the position of the last occurrence |
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181 of the <literal>searchString</literal>, |
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182 searching backwards from <literal>fromIndex</literal>. |
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183 Returns <value>-1</value> if the value is not found. |
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184 If <literal>searchString</literal> is empty, |
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185 then <literal>fromIndex</literal> is returned. |
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186 <example> |
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187 >> "nginx".lastIndexOf("gi") |
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188 1 |
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189 </example> |
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190 </tag-desc> |
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191 |
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192 <tag-name id="string_length"><literal>String.prototype.length</literal></tag-name> |
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193 <tag-desc> |
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194 Returns the length of the string. |
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195 <example> |
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196 >> 'αβγδ'.length |
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197 4 |
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198 </example> |
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199 </tag-desc> |
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200 |
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201 <tag-name><literal>String.prototype.match([<value>regexp</value>])</literal></tag-name> |
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202 <tag-desc> |
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203 Matches a string against a <literal>regexp</literal>. |
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204 <example> |
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205 >> 'nginx'.match( /ng/i ) |
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206 'ng' |
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207 </example> |
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208 </tag-desc> |
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209 |
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210 <tag-name id="string_padend"><literal>String.prototype.padEnd(<value>length</value> |
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211 [, <value>string</value>])</literal></tag-name> |
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212 <tag-desc> |
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213 Returns a string of a specified <literal>length</literal> |
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214 with the pad <literal>string</literal> applied |
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215 to the end of the specified string (0.2.3). |
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216 <example> |
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217 >> '1234'.padEnd(8, 'abcd') |
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218 '1234abcd' |
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219 </example> |
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220 </tag-desc> |
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221 |
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222 <tag-name id="string_padstart"><literal>String.prototype.padStart(<value>length</value> |
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223 [, <value>string</value>])</literal></tag-name> |
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224 <tag-desc> |
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225 Returns a string of a specified <literal>length</literal> |
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226 with the pad <literal>string</literal> applied |
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227 to the start of the specified string (0.2.3). |
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228 <example> |
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229 >> '1234'.padStart(8, 'abcd') |
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230 'abcd1234' |
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231 </example> |
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232 </tag-desc> |
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233 |
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234 <tag-name><literal>String.prototype.repeat(<value>number</value>)</literal></tag-name> |
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235 <tag-desc> |
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236 Returns a string |
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237 with the specified <literal>number</literal> of copies of the string. |
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238 <example> |
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239 >> 'abc'.repeat(3) |
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240 'abcabcabc' |
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241 </example> |
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242 </tag-desc> |
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243 |
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244 <tag-name><literal>String.prototype.replace([<value>regexp</value>|<value>string</value>[, |
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245 <value>string</value>|<value>function</value>]])</literal></tag-name> |
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246 <tag-desc> |
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247 Returns a new string with matches of a pattern |
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248 (<literal>string</literal> or a <literal>regexp</literal>) |
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249 replaced by a <literal>string</literal> or a <literal>function</literal>. |
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250 <example> |
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251 >> 'abcdefgh'.replace('d', 1) |
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252 'abc1efgh' |
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253 </example> |
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254 </tag-desc> |
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255 |
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256 <tag-name><literal>String.prototype.search([<value>regexp</value>])</literal></tag-name> |
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257 <tag-desc> |
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258 Searches for a string using a <literal>regexp</literal> |
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259 <example> |
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260 >> 'abcdefgh'.search('def') |
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261 3 |
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262 </example> |
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263 </tag-desc> |
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264 |
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265 <tag-name><literal>String.prototype.slice(<value>start</value>[, |
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266 <value>end</value>])</literal></tag-name> |
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267 <tag-desc> |
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268 Returns a new string containing a part of an |
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269 original string between <literal>start</literal> |
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270 and <literal>end</literal> or |
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271 from <literal>start</literal> to the end of the string. |
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272 <example> |
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273 >> 'abcdefghijklmno'.slice(NaN, 5) |
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274 'abcde' |
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275 </example> |
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276 </tag-desc> |
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277 |
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278 <tag-name><literal>String.prototype.startsWith(<value>searchString</value>[, |
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279 <value>position</value>])</literal></tag-name> |
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280 <tag-desc> |
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281 Returns <literal>true</literal> if a string begins with the characters |
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282 of a specified string, otherwise <literal>false</literal>. |
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283 The optional <literal>position</literal> parameter is the position |
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284 in this string at which to begin search for <literal>searchString</literal>. |
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285 Default value is 0. |
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286 <example> |
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287 >> 'abc'.startsWith('abc') |
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288 true |
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289 > 'aabc'.startsWith('abc') |
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290 false |
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291 </example> |
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292 </tag-desc> |
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293 |
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294 <tag-name><literal>String.prototype.substr(<value>start</value>[, |
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295 <value>length</value>])</literal></tag-name> |
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296 <tag-desc> |
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297 Returns the part of the string of the specified <literal>length</literal> |
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298 from <literal>start</literal> |
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299 or from <literal>start</literal> to the end of the string. |
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300 <example> |
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301 >> 'abcdefghijklmno'.substr(3, 5) |
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302 'defgh' |
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303 </example> |
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304 </tag-desc> |
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305 |
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306 <tag-name><literal>String.prototype.substring(<value>start</value>[, |
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307 <value>end</value>])</literal></tag-name> |
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308 <tag-desc> |
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309 Returns the part of the string between |
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310 <literal>start</literal> and <literal>end</literal> or |
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311 from <literal>start</literal> to the end of the string. |
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312 <example> |
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313 >> 'abcdefghijklmno'.substring(3, 5) |
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314 'de' |
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315 </example> |
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316 </tag-desc> |
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317 |
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318 <tag-name id="string_tobytes"><literal>String.prototype.toBytes(start[, |
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319 end])</literal></tag-name> |
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320 <tag-desc> |
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321 (njs specific) Serializes a Unicode string to a byte string. |
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322 Returns <literal>null</literal> if a character larger than 255 is |
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323 found in the string. |
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324 </tag-desc> |
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325 |
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326 <tag-name><literal>String.prototype.toLowerCase()</literal></tag-name> |
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327 <tag-desc> |
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328 Converts a string to lower case. |
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329 The method supports only simple Unicode folding. |
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330 <example> |
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331 >> 'ΑΒΓΔ'.toLowerCase() |
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332 'αβγδ' |
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333 </example> |
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334 </tag-desc> |
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335 |
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336 <tag-name><literal>String.prototype.toString([<value>encoding</value>])</literal></tag-name> |
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337 <tag-desc> |
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338 <para> |
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339 If no <literal>encoding</literal> is specified, |
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340 returns a specified Unicode string or byte string as in ECMAScript. |
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341 </para> |
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342 |
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343 <para> |
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344 (njs specific) If <literal>encoding</literal> is specified, |
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345 encodes a <link id="string_tobytes">byte string</link> to |
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346 <literal>hex</literal>, |
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347 <literal>base64</literal>, or |
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348 <literal>base64url</literal>. |
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349 </para> |
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350 <example> |
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351 >> 'αβγδ'.toUTF8().toString('base64url') |
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352 'zrHOss6zzrQ' |
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353 </example> |
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354 </tag-desc> |
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355 |
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356 <tag-name><literal>String.prototype.toUpperCase()</literal></tag-name> |
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357 <tag-desc> |
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358 Converts a string to upper case. |
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359 The method supports only simple Unicode folding. |
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360 <example> |
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361 >> 'αβγδ'.toUpperCase() |
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362 'ΑΒΓΔ' |
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363 </example> |
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364 </tag-desc> |
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365 |
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366 <tag-name id="string_toutf8"><literal>String.prototype.toUTF8(<value>start</value>[, |
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367 <value>end</value>])</literal></tag-name> |
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368 <tag-desc> |
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369 (njs specific) Serializes a Unicode string |
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370 to a byte string using UTF8 encoding. |
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371 <example> |
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372 >> 'αβγδ'.toUTF8().length |
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373 8 |
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374 >> 'αβγδ'.length |
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375 4 |
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376 </example> |
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377 </tag-desc> |
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378 |
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379 <tag-name><literal>String.prototype.trim()</literal></tag-name> |
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380 <tag-desc> |
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381 Removes whitespaces from both ends of a string. |
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382 <example> |
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383 >> ' abc '.trim() |
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384 'abc' |
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385 </example> |
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386 </tag-desc> |
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387 |
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388 <tag-name><literal>String.prototype.split(([<value>string</value>|<value>regexp</value>[, |
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389 <value>limit</value>]]))</literal></tag-name> |
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390 <tag-desc> |
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391 Returns match of a string against a <literal>regexp</literal>. |
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392 The optional <literal>limit</literal> parameter is an integer that specifies |
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393 a limit on the number of splits to be found. |
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394 <example> |
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395 >> 'abc'.split('') |
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396 [ |
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397 'a', |
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398 'b', |
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399 'c' |
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400 ] |
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401 </example> |
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402 </tag-desc> |
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403 |
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404 <tag-name id="encodeuri"><literal>encodeURI(<value>URI</value>)</literal></tag-name> |
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405 <tag-desc> |
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406 encodes a URI by replacing each instance of certain characters by |
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407 one, two, three, or four escape sequences |
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408 representing the UTF-8 encoding of the character |
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409 <example> |
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410 >> encodeURI('012αβγδ') |
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411 '012%CE%B1%CE%B2%CE%B3%CE%B4' |
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412 </example> |
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413 </tag-desc> |
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414 |
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415 <tag-name><literal>encodeURIComponent(<value>encodedURIString</value>)</literal></tag-name> |
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416 <tag-desc> |
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417 Encodes a URI by replacing each instance of certain characters |
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418 by one, two, three, or four escape sequences |
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419 representing the UTF-8 encoding of the character. |
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420 <example> |
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421 >> encodeURIComponent('[@?=') |
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422 '%5B%40%3F%3D' |
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423 </example> |
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424 </tag-desc> |
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425 |
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426 <tag-name><literal>decodeURI(<value>encodedURI</value>)</literal></tag-name> |
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427 <tag-desc> |
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428 Decodes a previously <link id="encodeuri">encoded</link> URI. |
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429 <example> |
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430 >> decodeURI('012%CE%B1%CE%B2%CE%B3%CE%B4') |
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431 '012αβγδ' |
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432 </example> |
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433 </tag-desc> |
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434 |
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435 <tag-name><literal>decodeURIComponent(<value>decodedURIString</value>)</literal></tag-name> |
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436 <tag-desc> |
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437 Decodes an encoded component of a previously encoded URI. |
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438 <example> |
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439 >> decodeURIComponent('%5B%40%3F%3D') |
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440 '[@?=' |
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441 </example> |
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442 </tag-desc> |
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443 |
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444 </list> |
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445 </para> |
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446 |
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447 </section> |
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448 |
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449 |
2176 | 450 <section id="core_json" name="JSON"> |
451 | |
452 <para> | |
453 The <literal>JSON</literal> object (ES 5.1) provides functions | |
454 to convert njs values to and from JSON format. | |
455 <list type="tag"> | |
456 | |
457 <tag-name><literal>JSON.parse(<value>string</value>[, | |
458 <value>reviver</value>])</literal></tag-name> | |
459 <tag-desc> | |
460 Converts a <literal>string</literal> that represents JSON data | |
461 into an njs object (<literal>{...}</literal>) or | |
462 array (<literal>[...]</literal>). | |
463 The optional <literal>reviver</literal> parameter is a function (key, value) | |
464 that will be called for each (key,value) pair and can transform the value. | |
465 </tag-desc> | |
466 | |
467 <tag-name><literal>JSON.stringify(<value>value</value>[, | |
468 <value>replacer</value>] [, <value>space</value>])</literal></tag-name> | |
469 <tag-desc> | |
470 Converts an njs object back to JSON. | |
471 The obligatory <literal>value</literal> parameter is generally a JSON | |
472 <literal>object</literal> or <literal>array</literal> that will be converted. | |
473 If the value has a <literal>toJSON()</literal> method, | |
474 it defines how the object will be serialized. | |
475 The optional <literal>replacer</literal> parameter is | |
476 a <literal>function</literal> or <literal>array</literal> | |
477 that transforms results. | |
478 The optional <literal>space</literal> parameter is | |
479 a <literal>string</literal> or <literal>number</literal>. | |
480 If it is a <literal>number</literal>, | |
481 it indicates the number of white spaces placed before a result | |
482 (no more than 10). | |
483 If it is a <literal>string</literal>, | |
484 it is used as a white space (or first 10 characters of it). | |
485 If omitted or is <literal>null</literal>, no white space is used. | |
486 </tag-desc> | |
487 </list> | |
488 </para> | |
489 | |
490 <para> | |
491 <example> | |
492 >> var json = JSON.parse('{"a":1, "b":true}') | |
493 >> json.a | |
494 1 | |
495 | |
496 >> JSON.stringify(json) | |
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497 '{"a":1,"b":true}' |
2176 | 498 |
499 >> JSON.stringify(json, undefined, 1) | |
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500 '{\n "a": 1,\n "b": true\n}' |
2176 | 501 |
502 >> JSON.stringify({ x: [10, undefined, function(){}] }) | |
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503 '{"x":[10,null,null]}' |
2176 | 504 |
505 >> JSON.stringify({"a":1, "toJSON": function() {return "xxx"}}) | |
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506 '"xxx"' |
2176 | 507 |
508 # Example with function replacer | |
509 | |
510 >> function replacer(key, value) {return (typeof value === 'string') ? undefined : value} | |
511 >>JSON.stringify({a:1, b:"b", c:true}, replacer) | |
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512 '{"a":1,"c":true}' |
2176 | 513 </example> |
514 </para> | |
515 | |
516 </section> | |
517 | |
2177 | 518 |
519 <section id="crypto" name="Crypto"> | |
520 | |
521 <para> | |
522 The Crypto module provides cryptographic functionality support. | |
523 The Crypto module object is returned by <literal>require('crypto')</literal>. | |
524 </para> | |
525 | |
526 <para> | |
527 <list type="tag"> | |
528 | |
529 <tag-name><literal>crypto.createHash(<value>algorithm</value>)</literal></tag-name> | |
530 <tag-desc> | |
531 Creates and returns a <link id="crypto_hash">Hash</link> object | |
532 that can be used to generate hash digests | |
533 using the given <value>algorithm</value>. | |
534 The algorighm can be | |
535 <literal>md5</literal>, | |
536 <literal>sha1</literal>, and | |
537 <literal>sha256</literal>. | |
538 </tag-desc> | |
539 | |
540 <tag-name><literal>crypto.createHmac(<value>algorithm</value>, | |
541 <value>secret key</value>)</literal></tag-name> | |
542 <tag-desc> | |
543 Creates and returns an <link id="crypto_hmac">HMAC</link> object | |
544 that uses the given <value>algorithm</value> and <value>secret key</value>. | |
545 The algorighm can be | |
546 <literal>md5</literal>, | |
547 <literal>sha1</literal>, and | |
548 <literal>sha256</literal>. | |
549 </tag-desc> | |
550 | |
551 </list> | |
552 </para> | |
553 | |
554 | |
555 <section id="crypto_hash" name="Hash"> | |
556 | |
557 <para> | |
558 <list type="tag"> | |
559 | |
560 <tag-name><literal>hash.update(<value>data</value>)</literal></tag-name> | |
561 <tag-desc> | |
562 Updates the hash content with the given <value>data</value>. | |
563 </tag-desc> | |
564 | |
565 <tag-name><literal>hash.digest([<value>encoding</value>])</literal></tag-name> | |
566 <tag-desc> | |
567 Calculates the digest of all of the data passed using | |
568 <literal>hash.update()</literal>. | |
569 The encoding can be | |
570 <literal>hex</literal>, | |
571 <literal>base64</literal>, and | |
572 <literal>base64url</literal>. | |
573 If encoding is not provided, a byte string is returned. | |
574 </tag-desc> | |
575 | |
576 </list> | |
577 </para> | |
578 | |
579 <para> | |
580 <example> | |
581 >> var cr = require('crypto') | |
582 undefined | |
583 | |
584 >> cr.createHash('sha1').update('A').update('B').digest('base64url') | |
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585 'BtlFlCqiamG-GMPiK_GbvKjdK10' |
2177 | 586 </example> |
587 </para> | |
588 | |
589 </section> | |
590 | |
591 | |
592 <section id="crypto_hmac" name="HMAC"> | |
593 | |
594 <para> | |
595 <list type="tag"> | |
596 | |
597 <tag-name><literal>hmac.update(<value>data</value>)</literal></tag-name> | |
598 <tag-desc> | |
599 Updates the HMAC content with the given <value>data</value>. | |
600 </tag-desc> | |
601 | |
602 <tag-name><literal>hmac.digest([<value>encoding</value>])</literal></tag-name> | |
603 <tag-desc> | |
604 Calculates the HMAC digest of all of the data passed using | |
605 <literal>hmac.update()</literal>. | |
606 The encoding can be | |
607 <literal>hex</literal>, | |
608 <literal>base64</literal>, and | |
609 <literal>base64url</literal>. | |
610 If encoding is not provided, a byte string is returned. | |
611 </tag-desc> | |
612 </list> | |
613 </para> | |
614 | |
615 <para> | |
616 <example> | |
617 >> var cr = require('crypto') | |
618 undefined | |
619 | |
620 >> cr.createHmac('sha1', 'secret.key').update('AB').digest('base64url') | |
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621 'Oglm93xn23_MkiaEq_e9u8zk374' |
2177 | 622 </example> |
623 </para> | |
624 | |
625 </section> | |
626 | |
627 </section> | |
628 | |
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629 <section id="njs_api_timers" name="Timers"> |
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630 |
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631 <para> |
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632 |
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633 <list type="tag"> |
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634 |
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635 <tag-name id="cleartimeout"><literal>clearTimeout(<value>timeout</value>)</literal></tag-name> |
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636 <tag-desc> |
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637 Cancels a <literal>timeout</literal> object |
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638 created by <link id="settimeout">setTimeout()</link>. |
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639 </tag-desc> |
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640 |
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641 <tag-name id="settimeout"><literal>setTimeout(<value>function</value>, |
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642 <value>ms</value>[, <value>arg1</value>, <value>argN</value>])</literal></tag-name> |
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643 <tag-desc> |
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644 Calls a <literal>function</literal> |
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645 after a specified number of <literal>milliseconds</literal>. |
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646 One or more optional <literal>arguments</literal> |
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647 can be passed to the specified function. |
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648 Returns a <literal>timeout</literal> object. |
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649 <example> |
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650 function handler(v) |
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651 { |
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652 // ... |
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653 } |
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654 |
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655 t = setTimeout(handler, 12); |
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656 |
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657 // ... |
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658 |
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659 clearTimeout(t); |
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660 </example> |
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661 </tag-desc> |
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662 |
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663 </list> |
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664 </para> |
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665 |
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666 </section> |
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667 |
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668 |
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669 <section id="njs_api_fs" name="File System"> |
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670 |
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671 <para> |
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672 The File System module provides operations with files. |
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673 The module object is returned by <literal>require('fs')</literal>. |
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674 <list type="tag"> |
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675 |
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676 <tag-name id="appendfilesync"><literal>appendFileSync(<value>filename</value>, |
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677 <value>data</value>[, <value>options</value>])</literal></tag-name> |
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678 <tag-desc> |
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679 Synchronously appends specified <literal>data</literal> |
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680 to a file with provided <literal>filename</literal>. |
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681 If the file does not exist, it will be created. |
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682 The <literal>options</literal> parameter is expected to be |
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683 an object with the following keys: |
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684 <list type="tag"> |
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685 |
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686 <tag-name><literal>mode</literal></tag-name> |
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687 <tag-desc> |
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688 mode option, by default is <literal>0o666</literal> |
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689 </tag-desc> |
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690 |
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691 <tag-name><literal>flag</literal></tag-name> |
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692 <tag-desc> |
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693 file system <link id="njs_api_fs_flags">flag</link>, |
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694 by default is <literal>a</literal> |
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695 </tag-desc> |
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696 |
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697 </list> |
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698 </tag-desc> |
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699 |
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700 <tag-name id="readfilesync"><literal>readFileSync(<value>filename</value>[, |
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701 <value>options</value>])</literal></tag-name> |
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702 <tag-desc> |
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703 Synchronously returns the contents of the file |
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704 with provided <literal>filename</literal>. |
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705 The <literal>options</literal> parameter holds |
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706 <literal>string</literal> that specifies encoding. |
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707 If not specified, a <link id="string_tobytes">byte string</link> is returned. |
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708 If <literal>utf8</literal> encoding is specified, a Unicode string is returned. |
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709 Otherwise, <literal>options</literal> is expected to be |
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710 an object with the following keys: |
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711 <list type="tag"> |
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712 |
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713 <tag-name><literal>encoding</literal></tag-name> |
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714 <tag-desc> |
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715 encoding, by default is not specified. |
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716 The encoding can be <literal>utf8</literal> |
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717 </tag-desc> |
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718 |
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719 <tag-name><literal>flag</literal></tag-name> |
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720 <tag-desc> |
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721 file system <link id="njs_api_fs_flags">flag</link>, |
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722 by default is <literal>r</literal> |
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723 </tag-desc> |
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724 |
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725 </list> |
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726 <example> |
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727 >> var fs = require('fs') |
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728 undefined |
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729 >> var file = fs.readFileSync('/file/path.tar.gz') |
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730 undefined |
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731 >> var gzipped = /^\x1f\x8b/.test(file); gzipped |
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|
732 true |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
733 </example> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
734 </tag-desc> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
735 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
736 <tag-name id="writefilesync"><literal>writeFileSync(<value>filename</value>, |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
737 <value>data</value>[, |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
738 <value>options</value>])</literal></tag-name> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
739 <tag-desc> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
740 Synchronously writes <literal>data</literal> to a file |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
741 with provided <literal>filename</literal>. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
742 If the file does not exist, it will be created, |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
743 if the file exists, it will be replaced. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
744 The <literal>options</literal> parameter is expected to be |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
745 an object with the following keys: |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
746 <list type="tag"> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
747 <tag-name><literal>mode</literal></tag-name> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
748 <tag-desc> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
749 mode option, by default is <literal>0o666</literal> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
750 </tag-desc> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
751 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
752 <tag-name><literal>flag</literal></tag-name> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
753 <tag-desc> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
754 file system <link id="njs_api_fs_flags">flag</link>, |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
755 by default is <literal>w</literal> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
756 </tag-desc> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
757 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
758 </list> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
759 <example> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
760 >> var fs = require('fs') |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
761 undefined |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
762 >> var file = fs.writeFileSync('hello.txt', 'Hello world') |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
763 undefined |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
764 </example> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
765 </tag-desc> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
766 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
767 </list> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
768 </para> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
769 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
770 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
771 <section id="njs_api_fs_flags" name="File System Flags"> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
772 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
773 <para> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
774 The <literal>flag</literal> option can accept the following values: |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
775 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
776 <list type= "bullet" compact="no"> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
777 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
778 <listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
779 <literal>a</literal>—open a file for appending. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
780 The file is created if it does not exist |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
781 </listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
782 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
783 <listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
784 <literal>ax</literal>—the same as <literal>a</literal> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
785 but fails if the file already exists |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
786 </listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
787 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
788 <listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
789 <literal>a+</literal>—open a file for reading and appending. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
790 If the file does not exist, it will be created |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
791 </listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
792 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
793 <listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
794 <literal>ax+</literal>—the same as <literal>a+</literal> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
795 but fails if the file already exists |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
796 </listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
797 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
798 <listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
799 <literal>as</literal>—open a file for appending in synchronous mode. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
800 If the file does not exist, it will be created |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
801 </listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
802 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
803 <listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
804 <literal>as+</literal>—open a file for reading and appending |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
805 in synchronous mode. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
806 If the file does not exist, it will be created |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
807 </listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
808 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
809 <listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
810 <literal>r</literal>—open a file for reading. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
811 An exception occurs if the file does not exist |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
812 </listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
813 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
814 <listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
815 <literal>r+</literal>—open a file for reading and writing. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
816 An exception occurs if the file does not exist |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
817 </listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
818 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
819 <listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
820 <literal>rs+</literal>—open a file for reading and writing |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
821 in synchronous mode. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
822 Instructs the operating system to bypass the local file system cache |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
823 </listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
824 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
825 <listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
826 <literal>w</literal>—open a file for writing. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
827 If the file does not exist, it will be created. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
828 If the file exists, it will be replaced |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
829 </listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
830 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
831 <listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
832 <literal>wx</literal>—the same as <literal>w</literal> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
833 but fails if the file already exists |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
834 </listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
835 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
836 <listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
837 <literal>w+</literal>—open a file for reading and writing. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
838 If the file does not exist, it will be created. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
839 If the file exists, it will be replaced |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
840 </listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
841 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
842 <listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
843 <literal>wx+</literal>—the same as <literal>w+</literal> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
844 but fails if the file already exists |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
845 </listitem> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
846 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
847 </list> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
848 </para> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
849 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
850 </section> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
851 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
852 </section> |
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Documented fileSystem methods in njs.
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|
853 |
2176 | 854 </section> |
855 | |
856 | |
2202
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Updated HTTP request and stream session sections for njs.
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|
857 <section id="http" name="HTTP Request"> |
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|
858 |
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|
859 <para> |
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Updated HTTP request and stream session sections for njs.
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|
860 The HTTP request object is available only in the |
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|
861 <link doc="../http/ngx_http_js_module.xml">ngx_http_js_module</link> module. |
2202
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Updated HTTP request and stream session sections for njs.
Yaroslav Zhuravlev <yar@nginx.com>
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diff
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|
862 All string properties of the object are <link id="string">byte strings</link>. |
2175
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|
863 |
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Moved njs HTTP and Stream API to a separate page.
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|
864 <list type="tag"> |
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Moved njs HTTP and Stream API to a separate page.
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|
865 |
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|
866 <tag-name><literal>r.args{}</literal></tag-name> |
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Moved njs HTTP and Stream API to a separate page.
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|
867 <tag-desc> |
2182
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|
868 request arguments object, read-only |
2175
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Moved njs HTTP and Stream API to a separate page.
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|
869 </tag-desc> |
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Moved njs HTTP and Stream API to a separate page.
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|
870 |
2182
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|
871 <tag-name><literal>r.error(<value>string</value>)</literal></tag-name> |
2175
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|
872 <tag-desc> |
2182
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Merged HTTP request,response, and reply in njs.
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|
873 writes a <literal>string</literal> to the error log |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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|
874 on the <literal>error</literal> level of logging |
2175
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|
875 </tag-desc> |
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Moved njs HTTP and Stream API to a separate page.
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|
876 |
2182
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Merged HTTP request,response, and reply in njs.
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|
877 <tag-name><literal>r.finish()</literal></tag-name> |
2175
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Moved njs HTTP and Stream API to a separate page.
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diff
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|
878 <tag-desc> |
2182
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|
879 finishes sending a response to the client |
2175
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|
880 </tag-desc> |
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Moved njs HTTP and Stream API to a separate page.
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diff
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|
881 |
2182
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|
882 <tag-name><literal>r.headersIn{}</literal></tag-name> |
2175
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
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|
883 <tag-desc> |
2182
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|
884 incoming headers object, read-only. |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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parents:
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diff
changeset
|
885 <para> |
2207
6f9fd9677d1b
Corrected description of r.headersIn and r.headersOut.
Dmitry Volyntsev <xeioex@nginx.com>
parents:
2204
diff
changeset
|
886 For example, the <literal>Foo</literal> header |
6f9fd9677d1b
Corrected description of r.headersIn and r.headersOut.
Dmitry Volyntsev <xeioex@nginx.com>
parents:
2204
diff
changeset
|
887 can be accessed with the syntax <literal>headersIn.foo</literal> |
6f9fd9677d1b
Corrected description of r.headersIn and r.headersOut.
Dmitry Volyntsev <xeioex@nginx.com>
parents:
2204
diff
changeset
|
888 or <literal>headersIn['Foo']</literal> |
2182
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Merged HTTP request,response, and reply in njs.
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|
889 </para> |
2175
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
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|
890 </tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
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parents:
diff
changeset
|
891 |
2182
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Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
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|
892 <tag-name><literal>r.headersOut{}</literal></tag-name> |
2175
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
893 <tag-desc> |
2182
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Merged HTTP request,response, and reply in njs.
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diff
changeset
|
894 outgoing headers object, writable. |
2175
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
895 <para> |
2207
6f9fd9677d1b
Corrected description of r.headersIn and r.headersOut.
Dmitry Volyntsev <xeioex@nginx.com>
parents:
2204
diff
changeset
|
896 For example, the <literal>Foo</literal> header |
6f9fd9677d1b
Corrected description of r.headersIn and r.headersOut.
Dmitry Volyntsev <xeioex@nginx.com>
parents:
2204
diff
changeset
|
897 can be accessed with the syntax <literal>headersOut.foo</literal> |
6f9fd9677d1b
Corrected description of r.headersIn and r.headersOut.
Dmitry Volyntsev <xeioex@nginx.com>
parents:
2204
diff
changeset
|
898 or <literal>headersOut['Foo']</literal> |
2175
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
899 </para> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
900 </tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
901 |
2182
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
902 <tag-name><literal>r.httpVersion</literal></tag-name> |
2175
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
903 <tag-desc> |
2182
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
changeset
|
904 HTTP version, read-only |
2175
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
905 </tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
906 |
2182
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
907 <tag-name><literal>r.log(<value>string</value>)</literal></tag-name> |
2175
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
908 <tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
909 writes a <literal>string</literal> to the error log |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
910 on the <literal>info</literal> level of logging |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
911 </tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
912 |
2183
97526b8346f4
Added r.internalRedirect and its example in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2182
diff
changeset
|
913 <tag-name id="r_internal_redirect"><literal>r.internalRedirect(<value>uri</value>)</literal></tag-name> |
97526b8346f4
Added r.internalRedirect and its example in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2182
diff
changeset
|
914 <tag-desc> |
97526b8346f4
Added r.internalRedirect and its example in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2182
diff
changeset
|
915 performs an internal redirect to the specified <literal>uri</literal>. |
97526b8346f4
Added r.internalRedirect and its example in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2182
diff
changeset
|
916 If the uri starts with the “<literal>@</literal>” prefix, |
97526b8346f4
Added r.internalRedirect and its example in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2182
diff
changeset
|
917 it is considered a named location. |
97526b8346f4
Added r.internalRedirect and its example in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2182
diff
changeset
|
918 </tag-desc> |
97526b8346f4
Added r.internalRedirect and its example in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2182
diff
changeset
|
919 |
2182
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
920 <tag-name><literal>r.method</literal></tag-name> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
921 <tag-desc> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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parents:
2178
diff
changeset
|
922 HTTP method, read-only |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
923 </tag-desc> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
changeset
|
924 |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
925 <tag-name><literal>r.parent</literal></tag-name> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
changeset
|
926 <tag-desc> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
changeset
|
927 references the parent request object |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
928 </tag-desc> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
929 |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
930 <tag-name><literal>r.remoteAddress</literal></tag-name> |
2175
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
931 <tag-desc> |
2182
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Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
932 client address, read-only |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
933 </tag-desc> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
934 |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
935 <tag-name><literal>r.requestBody</literal></tag-name> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
936 <tag-desc> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
changeset
|
937 holds the request body, read-only |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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parents:
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diff
changeset
|
938 </tag-desc> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
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|
939 |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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|
940 <tag-name><literal>r.responseBody</literal></tag-name> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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|
941 <tag-desc> |
2198
bb2c6b63cb9a
Documented r.responseBody size in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2189
diff
changeset
|
942 holds the <link id="subrequest">subrequest</link> response body, read-only. |
bb2c6b63cb9a
Documented r.responseBody size in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2189
diff
changeset
|
943 The size of <literal>r.responseBody</literal> is limited by the |
bb2c6b63cb9a
Documented r.responseBody size in njs.
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parents:
2189
diff
changeset
|
944 <link doc="../http/ngx_http_core_module.xml" id="subrequest_output_buffer_size"/> |
bb2c6b63cb9a
Documented r.responseBody size in njs.
Yaroslav Zhuravlev <yar@nginx.com>
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2189
diff
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|
945 directive. |
2175
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Moved njs HTTP and Stream API to a separate page.
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diff
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|
946 </tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
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diff
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|
947 |
2182
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Merged HTTP request,response, and reply in njs.
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|
948 <tag-name><literal>r.return(status[, string])</literal></tag-name> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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|
949 <tag-desc> |
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Merged HTTP request,response, and reply in njs.
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|
950 sends the entire response |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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changeset
|
951 with the specified <literal>status</literal> to the client |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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|
952 <para> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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|
953 It is possible to specify either a redirect URL |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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parents:
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|
954 (for codes 301, 302, 303, 307, and 308) |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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|
955 or the response body text (for other codes) as the second argument |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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parents:
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|
956 </para> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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|
957 </tag-desc> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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parents:
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changeset
|
958 |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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parents:
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diff
changeset
|
959 <tag-name><literal>r.send(<value>string</value>)</literal></tag-name> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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parents:
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|
960 <tag-desc> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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parents:
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changeset
|
961 sends a part of the response body to the client |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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parents:
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changeset
|
962 </tag-desc> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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changeset
|
963 |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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changeset
|
964 <tag-name><literal>r.sendHeader()</literal></tag-name> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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|
965 <tag-desc> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
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parents:
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|
966 sends the HTTP headers to the client |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
967 </tag-desc> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
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|
968 |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
969 <tag-name><literal>r.status</literal></tag-name> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
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|
970 <tag-desc> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
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|
971 status, writable |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
972 </tag-desc> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
973 |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
974 <tag-name><literal>r.variables{}</literal></tag-name> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
975 <tag-desc> |
7865ca0da0ab
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
changeset
|
976 nginx variables object, read-only |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
changeset
|
977 </tag-desc> |
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
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|
978 |
7865ca0da0ab
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
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|
979 <tag-name><literal>r.warn(<value>string</value>)</literal></tag-name> |
2175
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
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|
980 <tag-desc> |
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parents:
diff
changeset
|
981 writes a <literal>string</literal> to the error log |
2182
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
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|
982 on the <literal>warning</literal> level of logging |
2175
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
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|
983 </tag-desc> |
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parents:
diff
changeset
|
984 |
2182
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
985 <tag-name><literal>r.uri</literal></tag-name> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
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|
986 <tag-desc> |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
987 current URI, read-only |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
changeset
|
988 </tag-desc> |
7865ca0da0ab
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
changeset
|
989 |
7865ca0da0ab
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
changeset
|
990 <tag-name id="subrequest"><literal>r.subrequest(<value>uri</value>[, |
2175
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
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|
991 <value>options</value>[, <value>callback</value>]])</literal></tag-name> |
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
992 <tag-desc> |
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
993 creates a subrequest with the given <literal>uri</literal> and |
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
994 <literal>options</literal>, and installs |
2182
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parents:
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|
995 an optional completion <literal>callback</literal>. |
2175
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
996 |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
997 <para> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
998 If <literal>options</literal> is a string, then it |
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
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|
999 holds the subrequest arguments string. |
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1000 Otherwise, <literal>options</literal> is expected to be |
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1001 an object with the following keys: |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1002 <list type="tag"> |
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1003 <tag-name><literal>args</literal></tag-name> |
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1004 <tag-desc> |
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1005 arguments string |
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1006 </tag-desc> |
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1007 |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1008 <tag-name><literal>body</literal></tag-name> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1009 <tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1010 request body |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1011 </tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1012 |
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1013 <tag-name><literal>method</literal></tag-name> |
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1014 <tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1015 HTTP method |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1016 </tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1017 |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1018 </list> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1019 </para> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1020 |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1021 <para> |
2182
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Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
changeset
|
1022 The completion <literal>callback</literal> receives |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
changeset
|
1023 a subrequest response object with methods and properties |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
changeset
|
1024 identical to the parent request object. |
7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
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|
1025 </para> |
2175
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1026 </tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1027 |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1028 </list> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1029 </para> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1030 |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1031 </section> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1032 |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1033 |
2202
b91e766acbd4
Updated HTTP request and stream session sections for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2201
diff
changeset
|
1034 <section id="stream" name="Stream Session"> |
2175
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1035 |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1036 <para> |
2202
b91e766acbd4
Updated HTTP request and stream session sections for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2201
diff
changeset
|
1037 The stream session object is available only in the |
2175
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1038 <link doc="../stream/ngx_stream_js_module.xml">ngx_stream_js_module</link> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1039 module. |
2202
b91e766acbd4
Updated HTTP request and stream session sections for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2201
diff
changeset
|
1040 All string properties of the object are <link id="string">byte strings</link>. |
2175
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1041 |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1042 <list type="tag"> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1043 |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1044 <tag-name><literal>s.remoteAddress</literal></tag-name> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1045 <tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1046 client address, read-only |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1047 </tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1048 |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1049 <tag-name><literal>s.eof</literal></tag-name> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1050 <tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1051 a boolean read-only property, true if the current buffer is the last buffer |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1052 </tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1053 |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1054 <tag-name><literal>s.fromUpstream</literal></tag-name> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1055 <tag-desc> |
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1056 a boolean read-only property, |
cd4889fdcfa4
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1057 true if the current buffer is from the upstream server to the client |
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1058 </tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1059 |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1060 <tag-name><literal>s.buffer</literal></tag-name> |
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1061 <tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1062 the current buffer, writable |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1063 </tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1064 |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1065 <tag-name><literal>s.variables{}</literal></tag-name> |
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1066 <tag-desc> |
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1067 nginx variables object, read-only |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1068 </tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1069 |
cd4889fdcfa4
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1070 <tag-name><literal>s.OK</literal></tag-name> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1071 <tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1072 the <literal>OK</literal> return code |
cd4889fdcfa4
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1073 </tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1074 |
cd4889fdcfa4
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1075 <tag-name><literal>s.DECLINED</literal></tag-name> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1076 <tag-desc> |
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Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1077 the <literal>DECLINED</literal> return code |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1078 </tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1079 |
cd4889fdcfa4
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1080 <tag-name><literal>s.AGAIN</literal></tag-name> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1081 <tag-desc> |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1082 the <literal>AGAIN</literal> return code |
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1083 </tag-desc> |
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1084 |
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1085 <tag-name><literal>s.ERROR</literal></tag-name> |
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1086 <tag-desc> |
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1087 the <literal>ERROR</literal> return code |
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1088 </tag-desc> |
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1089 |
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1090 <tag-name><literal>s.ABORT</literal></tag-name> |
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1091 <tag-desc> |
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1092 the <literal>ABORT</literal> return code |
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1093 </tag-desc> |
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1094 |
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1095 <tag-name><literal>s.log(<value>string</value>)</literal></tag-name> |
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1096 <tag-desc> |
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1097 writes a sent <value>string</value> to the error log |
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1098 on the <literal>info</literal> level of logging |
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1099 </tag-desc> |
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1100 |
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1101 <tag-name><literal>s.warn(<value>string</value>)</literal></tag-name> |
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1102 <tag-desc> |
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1103 writes a sent <literal>string</literal> to the error log |
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1104 on the <literal>warning</literal> level of logging |
2175
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1105 </tag-desc> |
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1106 |
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1107 <tag-name><literal>s.error(<value>string</value>)</literal></tag-name> |
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1108 <tag-desc> |
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1109 writes a sent <literal>string</literal> to the error log |
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1110 on the <literal>error</literal> level of logging |
2175
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1111 </tag-desc> |
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1112 |
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1113 </list> |
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1114 </para> |
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1115 |
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1116 </section> |
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1117 |
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1118 |
2178 | 1119 <section id="example" name="Examples"> |
1120 | |
1121 | |
1122 <section id="example_urldecode" name="URL Decoding"> | |
1123 | |
1124 <para> | |
1125 <example> | |
1126 js_include urldecode.js; | |
1127 | |
1128 js_set $decoded_foo decoded_foo; | |
1129 </example> | |
1130 </para> | |
1131 | |
1132 <para> | |
1133 The <path>urldecode.js</path> file: | |
1134 <example> | |
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1135 function decoded_foo(r) { |
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1136 return decodeURIComponent(r.args.foo); |
2178 | 1137 } |
1138 </example> | |
1139 </para> | |
1140 | |
1141 </section> | |
1142 | |
1143 | |
1144 <section id="example_urlencode" name="URL Encoding"> | |
1145 | |
1146 <para> | |
1147 <example> | |
1148 js_include urlencode.js; | |
1149 | |
1150 js_set $encoded_foo encoded_foo; | |
1151 ... | |
1152 | |
1153 location / { | |
1154 proxy_pass http://example.com?foo=$encoded_foo; | |
1155 } | |
1156 </example> | |
1157 </para> | |
1158 | |
1159 <para> | |
1160 The <path>urlencode.js</path> file: | |
1161 <example> | |
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1162 function encoded_foo(r) { |
2178 | 1163 return encodeURIComponent('foo & bar?'); |
1164 } | |
1165 </example> | |
1166 </para> | |
1167 | |
1168 </section> | |
1169 | |
1170 | |
2183
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1171 <section id="example_internal_redirect" name="Internal Redirect"> |
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1172 |
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1173 <para> |
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1174 <example> |
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1175 js_include redirect.js; |
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1176 |
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1177 location /redirect { |
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1178 js_content redirect; |
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1179 } |
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1180 |
2201 | 1181 location @named { |
2183
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1182 return 200 named; |
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1183 } |
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1184 </example> |
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1185 </para> |
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1186 |
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1187 <para> |
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1188 The <path>redirect.js</path> file: |
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1189 <example> |
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1190 function redirect(r) { |
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1191 r.internalRedirect('@named'); |
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1192 } |
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1193 </example> |
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1194 </para> |
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1195 |
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1196 </section> |
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1197 |
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1198 |
2178 | 1199 <section id="example_fast_response" name="Returning Fastest Response from Proxy"> |
1200 | |
1201 <para> | |
1202 <example> | |
1203 js_include fastresponse.js; | |
1204 | |
1205 location /start { | |
1206 js_content content; | |
1207 } | |
1208 | |
1209 location /foo { | |
1210 proxy_pass http://backend1; | |
1211 } | |
1212 | |
1213 location /bar { | |
1214 proxy_pass http://backend2; | |
1215 } | |
1216 </example> | |
1217 </para> | |
1218 | |
1219 <para> | |
1220 The <path>fastresponse.js</path> file: | |
1221 <example> | |
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1222 function content(r) { |
2178 | 1223 var n = 0; |
1224 | |
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1225 function done(res) { |
2178 | 1226 if (n++ == 0) { |
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1227 r.return(res.status, res.responseBody); |
2178 | 1228 } |
1229 } | |
1230 | |
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1231 r.subrequest('/foo', r.variables.args, done); |
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1232 r.subrequest('/bar', r.variables.args, done); |
2178 | 1233 } |
1234 </example> | |
1235 </para> | |
1236 | |
1237 </section> | |
1238 | |
1239 | |
1240 <section id="example_jwt" name="Creating HS JWT"> | |
1241 | |
1242 <para> | |
1243 <example> | |
1244 js_include hs_jwt.js; | |
1245 | |
1246 js_set $jwt jwt; | |
1247 </example> | |
1248 </para> | |
1249 | |
1250 <para> | |
1251 The <path>hs_jwt.js</path> file: | |
1252 <example> | |
1253 function create_hs256_jwt(claims, key, valid) { | |
1254 var header = { "typ" : "JWT", "alg" : "HS256", "exp" : Date.now() + valid }; | |
1255 | |
1256 var s = JSON.stringify(header).toBytes().toString('base64url') + '.' | |
1257 + JSON.stringify(claims).toBytes().toString('base64url'); | |
1258 | |
1259 var h = require('crypto').createHmac('sha256', key); | |
1260 | |
1261 return s + '.' + h.update(s).digest().toString('base64url'); | |
1262 } | |
1263 | |
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1264 function jwt(r) { |
2178 | 1265 var claims = { |
1266 "iss" : "nginx", | |
1267 "sub" : "alice", | |
1268 "foo" : 123, | |
1269 "bar" : "qq", | |
1270 "zyx" : false | |
1271 }; | |
1272 | |
1273 return create_hs256_jwt(claims, 'foo', 600); | |
1274 } | |
1275 </example> | |
1276 </para> | |
1277 | |
1278 </section> | |
1279 | |
1280 | |
1281 <section id="example_subrequest" name="Accessing API from a Subrequest"> | |
1282 | |
1283 <para> | |
1284 <example> | |
1285 js_include subrequest.js; | |
1286 | |
1287 keyval_zone zone=foo:10m; | |
1288 ... | |
1289 | |
1290 location /keyval { | |
1291 js_content set_keyval; | |
1292 } | |
1293 | |
1294 location /version { | |
1295 js_content version; | |
1296 } | |
1297 | |
1298 location /api { | |
1299 api write=on; | |
1300 } | |
1301 </example> | |
1302 </para> | |
1303 | |
1304 <para> | |
1305 The <path>subrequest.js</path> file: | |
1306 <example> | |
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1307 function set_keyval(r) { |
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1308 r.subrequest('/api/3/http/keyvals/foo', |
2178 | 1309 { method: 'POST', |
1310 body: JSON.stringify({ foo: 789, bar: "ss dd 00" })}, | |
1311 | |
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1312 function(res) { |
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1313 if (res.status >= 300) { |
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1314 r.return(res.status, res.responseBody); |
2178 | 1315 return; |
1316 } | |
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1317 r.return(500); |
2178 | 1318 }); |
1319 } | |
2189
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1320 |
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1321 function version(r) { |
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1322 r.subrequest('/api/3/nginx', { method: 'GET' }, function(res) { |
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1323 if (res.status != 200) { |
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1324 r.return(res.status); |
2178 | 1325 return; |
1326 } | |
1327 | |
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1328 var json = JSON.parse(res.responseBody); |
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|
1329 r.return(200, json.version); |
2178 | 1330 }); |
1331 } | |
1332 </example> | |
1333 </para> | |
1334 | |
1335 </section> | |
1336 | |
1337 | |
1338 <section id="example_secure_link" name="Creating secure_link Hash"> | |
1339 | |
1340 <para> | |
1341 <example> | |
1342 js_include hash.js; | |
1343 | |
1344 js_set $new_foo create_secure_link; | |
1345 ... | |
1346 | |
1347 location / { | |
1348 secure_link $cookie_foo; | |
1349 secure_link_md5 "$uri mykey"; | |
1350 ... | |
1351 } | |
1352 | |
1353 location @login { | |
1354 add_header Set-Cookie "foo=$new_foo; Max-Age=60"; | |
1355 return 302 /; | |
1356 } | |
1357 </example> | |
1358 </para> | |
1359 | |
1360 <para> | |
1361 The <path>hash.js</path> file: | |
1362 <example> | |
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1363 function create_secure_link(r) { |
2178 | 1364 return require('crypto').createHash('md5') |
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7865ca0da0ab
Merged HTTP request,response, and reply in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2178
diff
changeset
|
1365 .update(r.uri).update(" mykey") |
2178 | 1366 .digest('base64url'); |
1367 } | |
1368 </example> | |
1369 </para> | |
1370 | |
1371 </section> | |
1372 | |
1373 </section> | |
1374 | |
2175
cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff
changeset
|
1375 </article> |