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0
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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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50
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20 static u_char ngx_http_msie_stub[] =
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0
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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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48
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54 static char error_401_page[] =
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55 "<html>" CRLF
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52
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56 "<head><title>401 Authorization Required</title></head>" CRLF
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48
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57 "<body bgcolor=\"white\">" CRLF
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52
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58 "<center><h1>401 Authorization Required</h1></center>" CRLF
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48
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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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0
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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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48
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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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0
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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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48
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110 static char error_410_page[] =
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111 "<html>" CRLF
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112 "<head><title>410 Gone</title></head>" CRLF
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113 "<body bgcolor=\"white\">" CRLF
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114 "<center><h1>410 Gone</h1></center>" CRLF
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115 ;
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116
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117
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0
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118 static char error_413_page[] =
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119 "<html>" CRLF
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120 "<head><title>413 Request Entity Too Large</title></head>" CRLF
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121 "<body bgcolor=\"white\">" CRLF
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122 "<center><h1>413 Request Entity Too Large</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_414_page[] =
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127 "<html>" CRLF
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128 "<head><title>414 Request-URI Too Large</title></head>" CRLF
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129 "<body bgcolor=\"white\">" CRLF
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130 "<center><h1>414 Request-URI Too Large</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_416_page[] =
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135 "<html>" CRLF
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136 "<head><title>416 Requested Range Not Satisfiable</title></head>" CRLF
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137 "<body bgcolor=\"white\">" CRLF
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138 "<center><h1>416 Requested Range Not Satisfiable</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_497_page[] =
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143 "<html>" CRLF
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144 "<head><title>400 The plain HTTP request was sent to HTTPS port</title></head>"
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145 CRLF
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146 "<body bgcolor=\"white\">" CRLF
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147 "<center><h1>400 Bad Request</h1></center>" CRLF
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148 "<center>The plain HTTP request was sent to HTTPS port</center>" CRLF
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149 ;
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150
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151
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152 static char error_500_page[] =
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153 "<html>" CRLF
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154 "<head><title>500 Internal Server Error</title></head>" CRLF
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155 "<body bgcolor=\"white\">" CRLF
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156 "<center><h1>500 Internal Server Error</h1></center>" CRLF
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157 ;
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158
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159
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160 static char error_501_page[] =
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161 "<html>" CRLF
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162 "<head><title>501 Method Not Implemented</title></head>" CRLF
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163 "<body bgcolor=\"white\">" CRLF
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164 "<center><h1>500 Method Not Implemented</h1></center>" CRLF
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165 ;
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166
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167
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168 static char error_502_page[] =
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169 "<html>" CRLF
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170 "<head><title>502 Bad Gateway</title></head>" CRLF
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171 "<body bgcolor=\"white\">" CRLF
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172 "<center><h1>502 Bad Gateway</h1></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_503_page[] =
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177 "<html>" CRLF
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178 "<head><title>503 Service Temporarily Unavailable</title></head>" CRLF
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179 "<body bgcolor=\"white\">" CRLF
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180 "<center><h1>503 Service Temporarily Unavailable</h1></center>" CRLF
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181 ;
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182
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183
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184 static char error_504_page[] =
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185 "<html>" CRLF
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186 "<head><title>504 Gateway Time-out</title></head>" CRLF
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187 "<body bgcolor=\"white\">" CRLF
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188 "<center><h1>504 Gateway Time-out</h1></center>" CRLF
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189 ;
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190
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191
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192 static ngx_str_t error_pages[] = {
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48
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193
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194 /* ngx_null_string, */ /* 300 */
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0
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195 ngx_string(error_301_page),
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196 ngx_string(error_302_page),
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197 ngx_null_string, /* 303 */
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198
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48
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199 #define NGX_HTTP_LEVEL_300 3
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200
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0
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201 ngx_string(error_400_page),
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202 ngx_string(error_401_page),
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203 ngx_string(error_402_page),
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0
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204 ngx_string(error_403_page),
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205 ngx_string(error_404_page),
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206 ngx_string(error_405_page),
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48
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207 ngx_string(error_406_page),
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0
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208 ngx_null_string, /* 407 */
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209 ngx_string(error_408_page),
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210 ngx_null_string, /* 409 */
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48
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211 ngx_string(error_410_page),
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0
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212 ngx_null_string, /* 411 */
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213 ngx_null_string, /* 412 */
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214 ngx_string(error_413_page),
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215 ngx_string(error_414_page),
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216 ngx_null_string, /* 415 */
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217 ngx_string(error_416_page),
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218
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48
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219 #define NGX_HTTP_LEVEL_400 17
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220
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221 ngx_string(error_497_page), /* 497, http to https */
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222 ngx_string(error_404_page), /* 498, invalid host name */
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48
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223 ngx_null_string, /* 499, client had closed connection */
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0
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224
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225 ngx_string(error_500_page),
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226 ngx_string(error_501_page),
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227 ngx_string(error_502_page),
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228 ngx_string(error_503_page),
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229 ngx_string(error_504_page)
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230 };
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231
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232
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36
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233 ngx_int_t
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234 ngx_http_special_response_handler(ngx_http_request_t *r, ngx_int_t error)
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0
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235 {
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236 ngx_int_t rc;
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237 ngx_uint_t i, err, msie_padding;
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0
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238 ngx_buf_t *b;
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239 ngx_chain_t *out, *cl;
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0
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240 ngx_http_err_page_t *err_page;
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241 ngx_http_core_loc_conf_t *clcf;
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242
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243 rc = ngx_http_discard_body(r);
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244
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245 if (rc == NGX_HTTP_INTERNAL_SERVER_ERROR) {
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246 error = NGX_HTTP_INTERNAL_SERVER_ERROR;
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247 }
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248
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249 r->headers_out.status = error;
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250
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251 if (r->keepalive != 0) {
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252 switch (error) {
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253 case NGX_HTTP_BAD_REQUEST:
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254 case NGX_HTTP_REQUEST_ENTITY_TOO_LARGE:
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255 case NGX_HTTP_REQUEST_URI_TOO_LARGE:
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256 case NGX_HTTP_TO_HTTPS:
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257 case NGX_HTTP_INTERNAL_SERVER_ERROR:
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258 r->keepalive = 0;
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259 }
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260 }
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261
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262 if (r->lingering_close == 1) {
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263 switch (error) {
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264 case NGX_HTTP_BAD_REQUEST:
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265 case NGX_HTTP_TO_HTTPS:
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266 r->lingering_close = 0;
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267 }
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268 }
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269
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270 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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271
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272 if (r->err_ctx == NULL && clcf->error_pages) {
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26
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273
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0
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274 err_page = clcf->error_pages->elts;
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26
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275
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0
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276 for (i = 0; i < clcf->error_pages->nelts; i++) {
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26
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277
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0
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278 if (err_page[i].status == error) {
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26
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279
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0
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280 if (err_page[i].overwrite) {
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281 r->err_status = err_page[i].overwrite;
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282 } else {
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283 r->err_status = error;
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284 }
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26
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285
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286 r->err_ctx = r->ctx;
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26
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287
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288 return ngx_http_internal_redirect(r, &err_page[i].uri, NULL);
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289 }
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290 }
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291 }
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292
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293 if (error < NGX_HTTP_BAD_REQUEST) {
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294 /* 3XX */
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295 err = error - NGX_HTTP_MOVED_PERMANENTLY;
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296
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297 } else if (error < NGX_HTTP_NGX_CODES) {
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298 /* 4XX */
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48
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299 err = error - NGX_HTTP_BAD_REQUEST + NGX_HTTP_LEVEL_300;
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0
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300
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301 } else {
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302 /* 49X, 5XX */
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48
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303 err = error - NGX_HTTP_NGX_CODES + NGX_HTTP_LEVEL_300
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304 + NGX_HTTP_LEVEL_400;
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0
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305 switch (error) {
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306 case NGX_HTTP_TO_HTTPS:
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307 r->headers_out.status = NGX_HTTP_BAD_REQUEST;
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308 error = NGX_HTTP_BAD_REQUEST;
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309 break;
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310
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311 case NGX_HTTP_INVALID_HOST:
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312 r->headers_out.status = NGX_HTTP_NOT_FOUND;
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313 error = NGX_HTTP_NOT_FOUND;
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314 break;
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315 }
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316 }
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317
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318 msie_padding = 0;
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319
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320 if (error_pages[err].len) {
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321 r->headers_out.content_length_n = error_pages[err].len
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322 + sizeof(error_tail) - 1;
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323
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324 if (clcf->msie_padding
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325 && r->headers_in.msie
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326 && r->http_version >= NGX_HTTP_VERSION_10
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327 && error >= NGX_HTTP_BAD_REQUEST
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328 && error != NGX_HTTP_REQUEST_URI_TOO_LARGE)
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329 {
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330 r->headers_out.content_length_n += sizeof(ngx_http_msie_stub) - 1;
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0
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331 msie_padding = 1;
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332 }
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333
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334 r->headers_out.content_type = ngx_list_push(&r->headers_out.headers);
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335 if (r->headers_out.content_type == NULL) {
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336 return NGX_ERROR;
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337 }
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338
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339 r->headers_out.content_type->key.len = sizeof("Content-Type") - 1;
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340 r->headers_out.content_type->key.data = (u_char *) "Content-Type";
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341 r->headers_out.content_type->value.len = sizeof("text/html") - 1;
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342 r->headers_out.content_type->value.data = (u_char *) "text/html";
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343
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344 } else {
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345 r->headers_out.content_length_n = -1;
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346 }
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347
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348 if (r->headers_out.content_length) {
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349 r->headers_out.content_length->key.len = 0;
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350 r->headers_out.content_length = NULL;
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351 }
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352
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353 rc = ngx_http_send_header(r);
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354
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355 if (rc == NGX_ERROR || r->header_only) {
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356 return rc;
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357 }
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358
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359 if (error_pages[err].len == 0) {
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360 return NGX_OK;
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361 }
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362
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363
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50
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364 b = ngx_calloc_buf(r->pool);
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365 if (b == NULL) {
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0
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366 return NGX_ERROR;
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367 }
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50
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368
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0
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369 b->memory = 1;
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370 b->pos = error_pages[err].data;
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371 b->last = error_pages[err].data + error_pages[err].len;
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372
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50
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373 cl = ngx_alloc_chain_link(r->pool);
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374 if (cl == NULL) {
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375 return NGX_ERROR;
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376 }
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377
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378 cl->buf = b;
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379 out = cl;
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0
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380
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381
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50
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382 b = ngx_calloc_buf(r->pool);
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383 if (b == NULL) {
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0
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384 return NGX_ERROR;
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385 }
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50
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386
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0
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387 b->memory = 1;
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388 b->pos = error_tail;
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389 b->last = error_tail + sizeof(error_tail) - 1;
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390
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50
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391 cl->next = ngx_alloc_chain_link(r->pool);
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392 if (cl->next == NULL) {
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393 return NGX_ERROR;
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394 }
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395
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396 cl = cl->next;
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397 cl->buf = b;
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0
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398
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399 if (msie_padding) {
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50
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400 b = ngx_calloc_buf(r->pool);
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401 if (b == NULL) {
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0
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402 return NGX_ERROR;
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403 }
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50
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404
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0
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405 b->memory = 1;
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50
|
406 b->pos = ngx_http_msie_stub;
|
|
|
407 b->last = ngx_http_msie_stub + sizeof(ngx_http_msie_stub) - 1;
|
|
0
|
408
|
|
50
|
409 cl->next = ngx_alloc_chain_link(r->pool);
|
|
|
410 if (cl->next == NULL) {
|
|
|
411 return NGX_ERROR;
|
|
|
412 }
|
|
|
413
|
|
|
414 cl = cl->next;
|
|
|
415 cl->buf = b;
|
|
0
|
416 }
|
|
|
417
|
|
|
418 b->last_buf = 1;
|
|
|
419
|
|
50
|
420 cl->next = NULL;
|
|
|
421
|
|
0
|
422 return ngx_http_output_filter(r, out);
|
|
|
423 }
|
