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230
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_http.h>
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10 #include <nginx.h>
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11
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12
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13 static u_char error_tail[] =
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14 "<hr><center>" NGINX_VER "</center>" CRLF
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15 "</body>" CRLF
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16 "</html>" CRLF
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17 ;
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18
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19
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20 static u_char ngx_http_msie_stub[] =
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21 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
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22 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
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23 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
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24 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
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25 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
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26 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
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27 ;
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28
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29
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30 static char error_301_page[] =
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31 "<html>" CRLF
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32 "<head><title>301 Moved Permanently</title></head>" CRLF
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33 "<body bgcolor=\"white\">" CRLF
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34 "<center><h1>301 Moved Permanently</h1></center>" CRLF
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35 ;
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36
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37
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38 static char error_302_page[] =
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39 "<html>" CRLF
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40 "<head><title>302 Found</title></head>" CRLF
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41 "<body bgcolor=\"white\">" CRLF
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42 "<center><h1>302 Found</h1></center>" CRLF
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43 ;
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44
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45
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46 static char error_400_page[] =
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47 "<html>" CRLF
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48 "<head><title>400 Bad Request</title></head>" CRLF
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49 "<body bgcolor=\"white\">" CRLF
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50 "<center><h1>400 Bad Request</h1></center>" CRLF
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51 ;
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52
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53
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54 static char error_401_page[] =
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55 "<html>" CRLF
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56 "<head><title>401 Authorization Required</title></head>" CRLF
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57 "<body bgcolor=\"white\">" CRLF
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58 "<center><h1>401 Authorization Required</h1></center>" CRLF
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59 ;
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60
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61
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62 static char error_402_page[] =
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63 "<html>" CRLF
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64 "<head><title>402 Payment Required</title></head>" CRLF
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65 "<body bgcolor=\"white\">" CRLF
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66 "<center><h1>402 Payment Required</h1></center>" CRLF
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67 ;
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68
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69
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70 static char error_403_page[] =
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71 "<html>" CRLF
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72 "<head><title>403 Forbidden</title></head>" CRLF
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73 "<body bgcolor=\"white\">" CRLF
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74 "<center><h1>403 Forbidden</h1></center>" CRLF
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75 ;
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76
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77
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78 static char error_404_page[] =
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79 "<html>" CRLF
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80 "<head><title>404 Not Found</title></head>" CRLF
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81 "<body bgcolor=\"white\">" CRLF
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82 "<center><h1>404 Not Found</h1></center>" CRLF
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83 ;
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84
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85
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86 static char error_405_page[] =
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87 "<html>" CRLF
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88 "<head><title>405 Not Allowed</title></head>" CRLF
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89 "<body bgcolor=\"white\">" CRLF
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90 "<center><h1>405 Not Allowed</h1></center>" CRLF
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91 ;
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92
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93
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94 static char error_406_page[] =
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95 "<html>" CRLF
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96 "<head><title>406 Not Acceptable</title></head>" CRLF
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97 "<body bgcolor=\"white\">" CRLF
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98 "<center><h1>406 Not Acceptable</h1></center>" CRLF
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99 ;
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100
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101
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102 static char error_408_page[] =
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103 "<html>" CRLF
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104 "<head><title>408 Request Time-out</title></head>" CRLF
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105 "<body bgcolor=\"white\">" CRLF
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106 "<center><h1>408 Request Time-out</h1></center>" CRLF
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107 ;
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108
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109
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110 static char error_409_page[] =
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111 "<html>" CRLF
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112 "<head><title>409 Conflict</title></head>" CRLF
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113 "<body bgcolor=\"white\">" CRLF
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114 "<center><h1>409 Conflict</h1></center>" CRLF
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115 ;
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116
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117
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118 static char error_410_page[] =
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119 "<html>" CRLF
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120 "<head><title>410 Gone</title></head>" CRLF
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121 "<body bgcolor=\"white\">" CRLF
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122 "<center><h1>410 Gone</h1></center>" CRLF
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123 ;
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124
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125
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126 static char error_411_page[] =
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127 "<html>" CRLF
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128 "<head><title>411 Length Required</title></head>" CRLF
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129 "<body bgcolor=\"white\">" CRLF
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130 "<center><h1>411 Length Required</h1></center>" CRLF
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131 ;
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132
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133
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134 static char error_413_page[] =
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135 "<html>" CRLF
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136 "<head><title>413 Request Entity Too Large</title></head>" CRLF
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137 "<body bgcolor=\"white\">" CRLF
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138 "<center><h1>413 Request Entity Too Large</h1></center>" CRLF
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139 ;
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140
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141
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142 static char error_414_page[] =
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143 "<html>" CRLF
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144 "<head><title>414 Request-URI Too Large</title></head>" CRLF
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145 "<body bgcolor=\"white\">" CRLF
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146 "<center><h1>414 Request-URI Too Large</h1></center>" CRLF
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147 ;
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148
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149
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150 static char error_415_page[] =
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151 "<html>" CRLF
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152 "<head><title>415 Unsupported Media Type</title></head>" CRLF
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153 "<body bgcolor=\"white\">" CRLF
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154 "<center><h1>415 Unsupported Media Type</h1></center>" CRLF
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155 ;
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156
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157
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158 static char error_416_page[] =
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159 "<html>" CRLF
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160 "<head><title>416 Requested Range Not Satisfiable</title></head>" CRLF
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161 "<body bgcolor=\"white\">" CRLF
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162 "<center><h1>416 Requested Range Not Satisfiable</h1></center>" CRLF
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163 ;
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164
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165
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166 static char error_495_page[] =
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167 "<html>" CRLF
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168 "<head><title>400 The SSL certificate error</title></head>"
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169 CRLF
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170 "<body bgcolor=\"white\">" CRLF
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171 "<center><h1>400 Bad Request</h1></center>" CRLF
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172 "<center>The SSL certificate error</center>" CRLF
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173 ;
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174
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175
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176 static char error_496_page[] =
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177 "<html>" CRLF
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178 "<head><title>400 No required SSL certificate was sent</title></head>"
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179 CRLF
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180 "<body bgcolor=\"white\">" CRLF
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181 "<center><h1>400 Bad Request</h1></center>" CRLF
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182 "<center>No required SSL certificate was sent</center>" CRLF
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183 ;
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184
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185
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186 static char error_497_page[] =
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187 "<html>" CRLF
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188 "<head><title>400 The plain HTTP request was sent to HTTPS port</title></head>"
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189 CRLF
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190 "<body bgcolor=\"white\">" CRLF
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191 "<center><h1>400 Bad Request</h1></center>" CRLF
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192 "<center>The plain HTTP request was sent to HTTPS port</center>" CRLF
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193 ;
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194
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195
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196 static char error_500_page[] =
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197 "<html>" CRLF
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198 "<head><title>500 Internal Server Error</title></head>" CRLF
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199 "<body bgcolor=\"white\">" CRLF
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200 "<center><h1>500 Internal Server Error</h1></center>" CRLF
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201 ;
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202
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203
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204 static char error_501_page[] =
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205 "<html>" CRLF
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206 "<head><title>501 Method Not Implemented</title></head>" CRLF
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207 "<body bgcolor=\"white\">" CRLF
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208 "<center><h1>501 Method Not Implemented</h1></center>" CRLF
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209 ;
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210
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211
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212 static char error_502_page[] =
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213 "<html>" CRLF
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214 "<head><title>502 Bad Gateway</title></head>" CRLF
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215 "<body bgcolor=\"white\">" CRLF
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216 "<center><h1>502 Bad Gateway</h1></center>" CRLF
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217 ;
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218
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219
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220 static char error_503_page[] =
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221 "<html>" CRLF
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222 "<head><title>503 Service Temporarily Unavailable</title></head>" CRLF
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223 "<body bgcolor=\"white\">" CRLF
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224 "<center><h1>503 Service Temporarily Unavailable</h1></center>" CRLF
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225 ;
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226
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227
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228 static char error_504_page[] =
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229 "<html>" CRLF
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230 "<head><title>504 Gateway Time-out</title></head>" CRLF
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231 "<body bgcolor=\"white\">" CRLF
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232 "<center><h1>504 Gateway Time-out</h1></center>" CRLF
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233 ;
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234
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235
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236 static char error_507_page[] =
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237 "<html>" CRLF
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238 "<head><title>507 Insufficient Storage</title></head>" CRLF
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239 "<body bgcolor=\"white\">" CRLF
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240 "<center><h1>507 Insufficient Storage</h1></center>" CRLF
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241 ;
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242
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243
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244 static ngx_str_t error_pages[] = {
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245
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246 ngx_null_string, /* 201, 204 */
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247
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248 #define NGX_HTTP_LEVEL_200 1
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249
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250 /* ngx_null_string, */ /* 300 */
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251 ngx_string(error_301_page),
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252 ngx_string(error_302_page),
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253 ngx_null_string, /* 303 */
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254
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255 #define NGX_HTTP_LEVEL_300 3
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256
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257 ngx_string(error_400_page),
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258 ngx_string(error_401_page),
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259 ngx_string(error_402_page),
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260 ngx_string(error_403_page),
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261 ngx_string(error_404_page),
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262 ngx_string(error_405_page),
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263 ngx_string(error_406_page),
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264 ngx_null_string, /* 407 */
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265 ngx_string(error_408_page),
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266 ngx_string(error_409_page),
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267 ngx_string(error_410_page),
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268 ngx_string(error_411_page),
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269 ngx_null_string, /* 412 */
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270 ngx_string(error_413_page),
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271 ngx_string(error_414_page),
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272 ngx_string(error_415_page),
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273 ngx_string(error_416_page),
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274
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275 #define NGX_HTTP_LEVEL_400 17
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276
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277 ngx_string(error_495_page), /* 495, https certificate error */
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278 ngx_string(error_496_page), /* 496, https no certificate */
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279 ngx_string(error_497_page), /* 497, http to https */
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280 ngx_string(error_404_page), /* 498, invalid host name */
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281 ngx_null_string, /* 499, client had closed connection */
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282
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283 ngx_string(error_500_page),
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284 ngx_string(error_501_page),
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285 ngx_string(error_502_page),
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286 ngx_string(error_503_page),
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287 ngx_string(error_504_page),
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288 ngx_null_string, /* 505 */
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289 ngx_null_string, /* 506 */
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290 ngx_string(error_507_page)
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291 };
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292
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293
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294 ngx_int_t
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295 ngx_http_special_response_handler(ngx_http_request_t *r, ngx_int_t error)
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296 {
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297 ngx_int_t rc;
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298 ngx_buf_t *b;
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299 ngx_str_t *uri;
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300 ngx_uint_t i, n, err, msie_padding;
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301 ngx_chain_t *out, *cl;
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302 ngx_http_err_page_t *err_page;
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303 ngx_http_core_loc_conf_t *clcf;
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304
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305 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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306 "http special response: %d, \"%V\"", error, &r->uri);
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307
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308 rc = ngx_http_discard_body(r);
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309
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310 if (rc == NGX_HTTP_INTERNAL_SERVER_ERROR) {
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311 error = NGX_HTTP_INTERNAL_SERVER_ERROR;
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312 }
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313
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314 r->headers_out.status = error;
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315 r->err_status = error;
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316
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317 if (r->keepalive != 0) {
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318 switch (error) {
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319 case NGX_HTTP_BAD_REQUEST:
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320 case NGX_HTTP_REQUEST_ENTITY_TOO_LARGE:
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321 case NGX_HTTP_REQUEST_URI_TOO_LARGE:
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322 case NGX_HTTP_TO_HTTPS:
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323 case NGX_HTTPS_CERT_ERROR:
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324 case NGX_HTTPS_NO_CERT:
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325 case NGX_HTTP_INTERNAL_SERVER_ERROR:
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326 r->keepalive = 0;
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327 }
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328 }
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329
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330 if (r->lingering_close == 1) {
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331 switch (error) {
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332 case NGX_HTTP_BAD_REQUEST:
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333 case NGX_HTTP_TO_HTTPS:
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334 case NGX_HTTPS_CERT_ERROR:
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335 case NGX_HTTPS_NO_CERT:
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336 r->lingering_close = 0;
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337 }
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338 }
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339
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340 r->headers_out.content_type.len = 0;
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341
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342 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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343
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344 if (!r->error_page && clcf->error_pages) {
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345
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346 if (clcf->recursive_error_pages == 0) {
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347 r->error_page = 1;
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348 }
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349
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350 err_page = clcf->error_pages->elts;
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351
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352 for (i = 0; i < clcf->error_pages->nelts; i++) {
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353
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354 if (err_page[i].status == error) {
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355 r->err_status = err_page[i].overwrite;
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356
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357 r->method = NGX_HTTP_GET;
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358
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359 uri = &err_page[i].uri;
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360
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361 if (err_page[i].uri_lengths) {
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362 if (ngx_http_script_run(r, uri,
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363 err_page[i].uri_lengths->elts, 0,
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364 err_page[i].uri_values->elts)
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365 == NULL)
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366 {
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367 return NGX_ERROR;
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368 }
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369
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370 if (r->zero_in_uri) {
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371 for (n = 0; n < uri->len; n++) {
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372 if (uri->data[n] == '\0') {
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373 goto zero;
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374 }
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375 }
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376
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377 r->zero_in_uri = 0;
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378 }
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379
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380 } else {
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381 r->zero_in_uri = 0;
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382 }
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383
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384 zero:
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385
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386 if (uri->data[0] == '/') {
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387 return ngx_http_internal_redirect(r, uri, NULL);
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388 }
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389
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390 r->headers_out.location =
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391 ngx_list_push(&r->headers_out.headers);
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392
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393 if (r->headers_out.location) {
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394 error = NGX_HTTP_MOVED_TEMPORARILY;
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395
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396 r->err_status = NGX_HTTP_MOVED_TEMPORARILY;
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397
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398 r->headers_out.location->hash = 1;
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399 r->headers_out.location->key.len = sizeof("Location") - 1;
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400 r->headers_out.location->key.data = (u_char *) "Location";
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401 r->headers_out.location->value = *uri;
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402
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403 } else {
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404 return NGX_ERROR;
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405 }
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406 }
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407 }
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408 }
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409
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410 if (error == NGX_HTTP_CREATED) {
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411 /* 201 */
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412 err = 0;
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413 r->header_only = 1;
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414
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415 } else if (error == NGX_HTTP_NO_CONTENT) {
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416 /* 204 */
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417 err = 0;
|
|
|
418
|
|
|
419 } else if (error < NGX_HTTP_BAD_REQUEST) {
|
|
|
420 /* 3XX */
|
|
|
421 err = error - NGX_HTTP_MOVED_PERMANENTLY + NGX_HTTP_LEVEL_200;
|
|
|
422
|
|
|
423 } else if (error < NGX_HTTP_OWN_CODES) {
|
|
|
424 /* 4XX */
|
|
|
425 err = error - NGX_HTTP_BAD_REQUEST + NGX_HTTP_LEVEL_200
|
|
|
426 + NGX_HTTP_LEVEL_300;
|
|
|
427
|
|
|
428 } else {
|
|
|
429 /* 49X, 5XX */
|
|
|
430 err = error - NGX_HTTP_OWN_CODES + NGX_HTTP_LEVEL_200
|
|
|
431 + NGX_HTTP_LEVEL_300
|
|
|
432 + NGX_HTTP_LEVEL_400;
|
|
|
433 switch (error) {
|
|
|
434 case NGX_HTTP_TO_HTTPS:
|
|
|
435 case NGX_HTTPS_CERT_ERROR:
|
|
|
436 case NGX_HTTPS_NO_CERT:
|
|
|
437 r->headers_out.status = NGX_HTTP_BAD_REQUEST;
|
|
|
438 error = NGX_HTTP_BAD_REQUEST;
|
|
|
439 break;
|
|
|
440 }
|
|
|
441 }
|
|
|
442
|
|
|
443 msie_padding = 0;
|
|
|
444
|
|
|
445 if (error_pages[err].len) {
|
|
|
446 r->headers_out.content_length_n = error_pages[err].len
|
|
|
447 + sizeof(error_tail) - 1;
|
|
|
448
|
|
|
449 if (clcf->msie_padding
|
|
|
450 && r->headers_in.msie
|
|
|
451 && r->http_version >= NGX_HTTP_VERSION_10
|
|
|
452 && error >= NGX_HTTP_BAD_REQUEST
|
|
|
453 && error != NGX_HTTP_REQUEST_URI_TOO_LARGE)
|
|
|
454 {
|
|
|
455 r->headers_out.content_length_n += sizeof(ngx_http_msie_stub) - 1;
|
|
|
456 msie_padding = 1;
|
|
|
457 }
|
|
|
458
|
|
|
459 r->headers_out.content_type.len = sizeof("text/html") - 1;
|
|
|
460 r->headers_out.content_type.data = (u_char *) "text/html";
|
|
|
461
|
|
|
462 } else {
|
|
|
463 r->headers_out.content_length_n = -1;
|
|
|
464 }
|
|
|
465
|
|
|
466 if (r->headers_out.content_length) {
|
|
|
467 r->headers_out.content_length->hash = 0;
|
|
|
468 r->headers_out.content_length = NULL;
|
|
|
469 }
|
|
|
470
|
|
|
471 ngx_http_clear_accept_ranges(r);
|
|
|
472 ngx_http_clear_last_modified(r);
|
|
|
473
|
|
|
474 rc = ngx_http_send_header(r);
|
|
|
475
|
|
|
476 if (rc == NGX_ERROR || r->header_only) {
|
|
|
477 return rc;
|
|
|
478 }
|
|
|
479
|
|
|
480 if (error_pages[err].len == 0) {
|
|
|
481 return NGX_OK;
|
|
|
482 }
|
|
|
483
|
|
|
484
|
|
|
485 b = ngx_calloc_buf(r->pool);
|
|
|
486 if (b == NULL) {
|
|
|
487 return NGX_ERROR;
|
|
|
488 }
|
|
|
489
|
|
|
490 b->memory = 1;
|
|
|
491 b->pos = error_pages[err].data;
|
|
|
492 b->last = error_pages[err].data + error_pages[err].len;
|
|
|
493
|
|
|
494 cl = ngx_alloc_chain_link(r->pool);
|
|
|
495 if (cl == NULL) {
|
|
|
496 return NGX_ERROR;
|
|
|
497 }
|
|
|
498
|
|
|
499 cl->buf = b;
|
|
|
500 out = cl;
|
|
|
501
|
|
|
502
|
|
|
503 b = ngx_calloc_buf(r->pool);
|
|
|
504 if (b == NULL) {
|
|
|
505 return NGX_ERROR;
|
|
|
506 }
|
|
|
507
|
|
|
508 b->memory = 1;
|
|
|
509 b->pos = error_tail;
|
|
|
510 b->last = error_tail + sizeof(error_tail) - 1;
|
|
|
511
|
|
|
512 cl->next = ngx_alloc_chain_link(r->pool);
|
|
|
513 if (cl->next == NULL) {
|
|
|
514 return NGX_ERROR;
|
|
|
515 }
|
|
|
516
|
|
|
517 cl = cl->next;
|
|
|
518 cl->buf = b;
|
|
|
519
|
|
|
520 if (msie_padding) {
|
|
|
521 b = ngx_calloc_buf(r->pool);
|
|
|
522 if (b == NULL) {
|
|
|
523 return NGX_ERROR;
|
|
|
524 }
|
|
|
525
|
|
|
526 b->memory = 1;
|
|
|
527 b->pos = ngx_http_msie_stub;
|
|
|
528 b->last = ngx_http_msie_stub + sizeof(ngx_http_msie_stub) - 1;
|
|
|
529
|
|
|
530 cl->next = ngx_alloc_chain_link(r->pool);
|
|
|
531 if (cl->next == NULL) {
|
|
|
532 return NGX_ERROR;
|
|
|
533 }
|
|
|
534
|
|
|
535 cl = cl->next;
|
|
|
536 cl->buf = b;
|
|
|
537 }
|
|
|
538
|
|
|
539 if (r == r->main) {
|
|
|
540 b->last_buf = 1;
|
|
|
541 }
|
|
|
542
|
|
|
543 b->last_in_chain = 1;
|
|
|
544
|
|
|
545 cl->next = NULL;
|
|
|
546
|
|
|
547 return ngx_http_output_filter(r, out);
|
|
|
548 }
|
