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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 #ifndef _NGX_HTTP_REQUEST_H_INCLUDED_
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8 #define _NGX_HTTP_REQUEST_H_INCLUDED_
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9
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10
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11 #define NGX_HTTP_DISCARD_BUFFER_SIZE 4096
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12 #define NGX_HTTP_LINGERING_BUFFER_SIZE 4096
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13
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14
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15 #define NGX_HTTP_VERSION_9 9
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16 #define NGX_HTTP_VERSION_10 1000
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17 #define NGX_HTTP_VERSION_11 1001
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18
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19 #define NGX_HTTP_GET 1
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20 #define NGX_HTTP_HEAD 2
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21 #define NGX_HTTP_POST 3
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22
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23 #define NGX_HTTP_CONNECTION_CLOSE 1
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24 #define NGX_HTTP_CONNECTION_KEEP_ALIVE 2
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25
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26
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27 #define NGX_NONE 1
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28
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29
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30 #define NGX_HTTP_PARSE_HEADER_DONE 1
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31
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32 #define NGX_HTTP_CLIENT_ERROR 10
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33 #define NGX_HTTP_PARSE_INVALID_METHOD 10
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34 #define NGX_HTTP_PARSE_INVALID_REQUEST 11
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35 #define NGX_HTTP_PARSE_TOO_LONG_URI 12
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36 #define NGX_HTTP_PARSE_INVALID_09_METHOD 13
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37
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38 #define NGX_HTTP_PARSE_HEADER_ERROR 14
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39 #define NGX_HTTP_PARSE_INVALID_HEADER 14
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40 #define NGX_HTTP_PARSE_TOO_LONG_HEADER 15
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41 #define NGX_HTTP_PARSE_NO_HOST_HEADER 17
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42 #define NGX_HTTP_PARSE_INVALID_CL_HEADER 18
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43 #define NGX_HTTP_PARSE_POST_WO_CL_HEADER 19
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44 #define NGX_HTTP_PARSE_HTTP_TO_HTTPS 20
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45 #define NGX_HTTP_PARSE_INVALID_HOST 21
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46
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47
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48 #define NGX_HTTP_OK 200
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49 #define NGX_HTTP_PARTIAL_CONTENT 206
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50
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51 #define NGX_HTTP_SPECIAL_RESPONSE 300
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52 #define NGX_HTTP_MOVED_PERMANENTLY 301
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53 #define NGX_HTTP_MOVED_TEMPORARILY 302
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54 #define NGX_HTTP_NOT_MODIFIED 304
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55
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56 #define NGX_HTTP_BAD_REQUEST 400
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57 #define NGX_HTTP_FORBIDDEN 403
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58 #define NGX_HTTP_NOT_FOUND 404
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59 #define NGX_HTTP_NOT_ALLOWED 405
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60 #define NGX_HTTP_REQUEST_TIME_OUT 408
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61 #define NGX_HTTP_REQUEST_ENTITY_TOO_LARGE 413
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62 #define NGX_HTTP_REQUEST_URI_TOO_LARGE 414
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63 #define NGX_HTTP_RANGE_NOT_SATISFIABLE 416
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64
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65
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66 /* Our own HTTP codes */
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67
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68 #define NGX_HTTP_NGX_CODES NGX_HTTP_TO_HTTPS
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69
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70 /*
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71 * We use the special code for the plain HTTP requests that are sent to
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72 * HTTPS port to distinguish it from 4XX in an error page redirection
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73 */
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74 #define NGX_HTTP_TO_HTTPS 497
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75
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76 /*
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77 * We use the special code for the requests with invalid host name
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78 * to distinguish it from 4XX in an error page redirection
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79 */
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80 #define NGX_HTTP_INVALID_HOST 498
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81
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82 /*
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83 * HTTP does not define the code for the case when a client closed
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84 * the connection while we are processing its request so we introduce
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85 * own code to log such situation when a client has closed the connection
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86 * before we even try to send the HTTP header to it
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87 */
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88 #define NGX_HTTP_CLIENT_CLOSED_REQUEST 499
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89
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90
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91 #define NGX_HTTP_INTERNAL_SERVER_ERROR 500
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92 #define NGX_HTTP_NOT_IMPLEMENTED 501
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93 #define NGX_HTTP_BAD_GATEWAY 502
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94 #define NGX_HTTP_SERVICE_UNAVAILABLE 503
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95 #define NGX_HTTP_GATEWAY_TIME_OUT 504
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96
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97
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98 typedef enum {
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99 NGX_HTTP_RESTRICT_HOST_OFF = 0,
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100 NGX_HTTP_RESTRICT_HOST_ON,
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101 NGX_HTTP_RESTRICT_HOST_CLOSE
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102 } ngx_http_restrict_host_e;
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103
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104
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105 typedef enum {
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106 NGX_HTTP_INITING_REQUEST_STATE = 0,
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107 NGX_HTTP_READING_REQUEST_STATE,
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108 NGX_HTTP_PROCESS_REQUEST_STATE,
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109
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110 NGX_HTTP_CONNECT_UPSTREAM_STATE,
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111 NGX_HTTP_WRITING_UPSTREAM_STATE,
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112 NGX_HTTP_READING_UPSTREAM_STATE,
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113
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114 NGX_HTTP_WRITING_REQUEST_STATE,
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115 NGX_HTTP_LINGERING_CLOSE_STATE,
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116 NGX_HTTP_KEEPALIVE_STATE
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117 } ngx_http_state_e;
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118
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119
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120 typedef struct {
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121 ngx_str_t name;
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122 ngx_uint_t offset;
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123 } ngx_http_header_t;
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124
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125
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126 typedef struct {
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127 ngx_list_t headers;
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128
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129 ngx_table_elt_t *host;
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130 ngx_table_elt_t *connection;
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131 ngx_table_elt_t *if_modified_since;
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132 ngx_table_elt_t *user_agent;
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133 ngx_table_elt_t *referer;
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134 ngx_table_elt_t *content_length;
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135
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136 ngx_table_elt_t *range;
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137
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138 #if (NGX_HTTP_GZIP)
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139 ngx_table_elt_t *accept_encoding;
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140 ngx_table_elt_t *via;
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141 #endif
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142
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143 ngx_table_elt_t *authorization;
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144
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145 ngx_table_elt_t *keep_alive;
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146
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147 #if (NGX_HTTP_PROXY)
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148 ngx_table_elt_t *x_forwarded_for;
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149 #endif
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150
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151 ngx_array_t cookies;
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152
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153 size_t host_name_len;
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154 ssize_t content_length_n;
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155 size_t connection_type;
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156 ssize_t keep_alive_n;
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157
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158 unsigned msie:1;
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159 unsigned msie4:1;
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160 unsigned opera:1;
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161 unsigned gecko:1;
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162 unsigned konqueror:1;
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163 } ngx_http_headers_in_t;
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164
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165
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166 typedef struct {
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167 off_t start;
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168 off_t end;
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169 ngx_str_t content_range;
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170 } ngx_http_range_t;
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171
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172
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173 typedef struct {
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174 ngx_list_t headers;
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175
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176 ngx_uint_t status;
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177 ngx_str_t status_line;
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178
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179 ngx_table_elt_t *server;
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180 ngx_table_elt_t *date;
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181 ngx_table_elt_t *content_type;
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182 ngx_table_elt_t *content_length;
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183 ngx_table_elt_t *content_encoding;
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184 ngx_table_elt_t *location;
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185 ngx_table_elt_t *last_modified;
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186 ngx_table_elt_t *content_range;
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187 ngx_table_elt_t *accept_ranges;
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188 ngx_table_elt_t *expires;
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189 ngx_table_elt_t *cache_control;
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190 ngx_table_elt_t *etag;
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191
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192 ngx_str_t charset;
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193 ngx_array_t ranges;
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194
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195 off_t content_length_n;
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196 time_t date_time;
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197 time_t last_modified_time;
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198 } ngx_http_headers_out_t;
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199
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200
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201 typedef struct {
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202 ngx_temp_file_t *temp_file;
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203 ngx_chain_t *bufs;
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204 ngx_buf_t *buf;
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205 size_t rest;
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206 void (*handler) (void *data);
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207 void *data;
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208 } ngx_http_request_body_t;
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209
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210
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211 struct ngx_http_cleanup_s {
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212 union {
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213 struct {
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214 ngx_fd_t fd;
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215 u_char *name;
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216 } file;
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217
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218 struct {
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219 ngx_http_cache_hash_t *hash;
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220 ngx_http_cache_t *cache;
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221 } cache;
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222 } data;
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223
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224 unsigned valid:1;
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225 unsigned cache:1;
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226 };
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227
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228
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229 typedef struct {
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230 ngx_http_request_t *request;
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231
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232 ngx_buf_t **busy;
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233 ngx_int_t nbusy;
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234
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235 ngx_buf_t **free;
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236 ngx_int_t nfree;
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237
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238 ngx_uint_t pipeline; /* unsigned pipeline:1; */
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239 } ngx_http_connection_t;
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240
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241
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242 typedef ngx_int_t (*ngx_http_handler_pt)(ngx_http_request_t *r);
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243
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244 struct ngx_http_request_s {
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245 uint32_t signature; /* "HTTP" */
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246
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247 ngx_connection_t *connection;
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248
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249 void **ctx;
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250 void **main_conf;
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251 void **srv_conf;
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252 void **loc_conf;
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253
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254 ngx_http_cache_t *cache;
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255
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256 ngx_file_t file;
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257
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258 ngx_pool_t *pool;
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259 ngx_buf_t *header_in;
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260
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261 ngx_http_headers_in_t headers_in;
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262 ngx_http_headers_out_t headers_out;
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263
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264 ngx_http_request_body_t *request_body;
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265
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266 time_t lingering_time;
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267
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268 ngx_uint_t method;
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269 ngx_uint_t http_version;
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270 ngx_uint_t http_major;
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271 ngx_uint_t http_minor;
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272
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273 ngx_str_t request_line;
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274 ngx_str_t uri;
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275 ngx_str_t args;
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276 ngx_str_t exten;
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277 ngx_str_t unparsed_uri;
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278
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279 ngx_str_t method_name;
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280
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281 ngx_http_request_t *main;
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282
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283 uint32_t in_addr;
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284 ngx_uint_t port;
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285 ngx_str_t *port_text; /* ":80" */
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286 ngx_str_t *server_name;
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287 ngx_array_t *virtual_names;
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288
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289 ngx_uint_t phase;
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290 ngx_int_t phase_handler;
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291 ngx_http_handler_pt content_handler;
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292
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293 ngx_array_t cleanup;
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294
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295 /* used to learn the Apache compatible response length without a header */
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296 size_t header_size;
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297
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298 u_char *discarded_buffer;
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299 void **err_ctx;
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300 ngx_uint_t err_status;
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301
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302 ngx_http_connection_t *http_connection;
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303
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304 unsigned http_state:4;
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305
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306 #if 0
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307 /* URI is not started with '/' - "GET http://" */
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308 unsigned unusual_uri:1;
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309 #endif
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310 /* URI with "/.", "%" and on Win32 with "//" */
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311 unsigned complex_uri:1;
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312 unsigned header_timeout_set:1;
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313
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314 unsigned proxy:1;
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315 unsigned bypass_cache:1;
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316 unsigned no_cache:1;
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317
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318 #if 0
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319 unsigned cachable:1;
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320 #endif
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321 unsigned pipeline:1;
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322
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323 /* can we use sendfile ? */
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324 unsigned sendfile:1;
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325
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326 unsigned plain_http:1;
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327 unsigned chunked:1;
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328 unsigned header_only:1;
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329 unsigned keepalive:1;
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330 unsigned lingering_close:1;
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331 unsigned closed:1;
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332
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333 unsigned filter_need_in_memory:1;
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334 unsigned filter_ssi_need_in_memory:1;
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335 unsigned filter_need_temporary:1;
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336 unsigned filter_allow_ranges:1;
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337
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338 #if (NGX_STAT_STUB)
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339 unsigned stat_reading:1;
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340 unsigned stat_writing:1;
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341 #endif
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342
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343 ngx_uint_t headers_n;
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344
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345 /* used to parse HTTP headers */
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346 ngx_uint_t state;
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347 u_char *uri_start;
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348 u_char *uri_end;
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349 u_char *uri_ext;
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350 u_char *args_start;
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351 u_char *request_start;
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352 u_char *request_end;
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353 u_char *method_end;
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354 u_char *schema_start;
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355 u_char *schema_end;
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356 u_char *host_start;
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357 u_char *host_end;
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358 u_char *port_start;
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359 u_char *port_end;
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360 u_char *header_name_start;
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361 u_char *header_name_end;
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362 u_char *header_start;
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363 u_char *header_end;
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364 };
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365
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366
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367 extern ngx_http_header_t ngx_http_headers_in[];
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368 extern ngx_http_header_t ngx_http_headers_out[];
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369
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370
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371
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372 #endif /* _NGX_HTTP_REQUEST_H_INCLUDED_ */
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