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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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4
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41 #define NGX_HTTP_PARSE_NO_HOST_HEADER 16
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42 #define NGX_HTTP_PARSE_INVALID_CL_HEADER 17
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43 #define NGX_HTTP_PARSE_POST_WO_CL_HEADER 18
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10
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44
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45 #define NGX_HTTP_PARSE_INVALID_HOST 19
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46 #define NGX_HTTP_PARSE_HTTP_TO_HTTPS 20
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0
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47
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48
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49 #define NGX_HTTP_OK 200
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50 #define NGX_HTTP_PARTIAL_CONTENT 206
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51
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52 #define NGX_HTTP_SPECIAL_RESPONSE 300
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53 #define NGX_HTTP_MOVED_PERMANENTLY 301
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54 #define NGX_HTTP_MOVED_TEMPORARILY 302
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55 #define NGX_HTTP_NOT_MODIFIED 304
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56
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57 #define NGX_HTTP_BAD_REQUEST 400
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58 #define NGX_HTTP_FORBIDDEN 403
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59 #define NGX_HTTP_NOT_FOUND 404
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60 #define NGX_HTTP_NOT_ALLOWED 405
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61 #define NGX_HTTP_REQUEST_TIME_OUT 408
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62 #define NGX_HTTP_REQUEST_ENTITY_TOO_LARGE 413
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63 #define NGX_HTTP_REQUEST_URI_TOO_LARGE 414
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64 #define NGX_HTTP_RANGE_NOT_SATISFIABLE 416
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65
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66
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67 /* Our own HTTP codes */
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68
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69 #define NGX_HTTP_NGX_CODES NGX_HTTP_TO_HTTPS
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70
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71 /*
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72 * We use the special code for the plain HTTP requests that are sent to
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73 * HTTPS port to distinguish it from 4XX in an error page redirection
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74 */
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75 #define NGX_HTTP_TO_HTTPS 497
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76
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77 /*
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78 * We use the special code for the requests with invalid host name
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79 * to distinguish it from 4XX in an error page redirection
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80 */
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81 #define NGX_HTTP_INVALID_HOST 498
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82
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83 /*
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84 * HTTP does not define the code for the case when a client closed
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85 * the connection while we are processing its request so we introduce
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86 * own code to log such situation when a client has closed the connection
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87 * before we even try to send the HTTP header to it
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88 */
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89 #define NGX_HTTP_CLIENT_CLOSED_REQUEST 499
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90
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91
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92 #define NGX_HTTP_INTERNAL_SERVER_ERROR 500
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93 #define NGX_HTTP_NOT_IMPLEMENTED 501
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94 #define NGX_HTTP_BAD_GATEWAY 502
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95 #define NGX_HTTP_SERVICE_UNAVAILABLE 503
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96 #define NGX_HTTP_GATEWAY_TIME_OUT 504
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97
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98
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99 typedef enum {
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100 NGX_HTTP_RESTRICT_HOST_OFF = 0,
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101 NGX_HTTP_RESTRICT_HOST_ON,
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102 NGX_HTTP_RESTRICT_HOST_CLOSE
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103 } ngx_http_restrict_host_e;
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104
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105
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106 typedef enum {
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107 NGX_HTTP_INITING_REQUEST_STATE = 0,
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108 NGX_HTTP_READING_REQUEST_STATE,
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109 NGX_HTTP_PROCESS_REQUEST_STATE,
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110
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111 NGX_HTTP_CONNECT_UPSTREAM_STATE,
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112 NGX_HTTP_WRITING_UPSTREAM_STATE,
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113 NGX_HTTP_READING_UPSTREAM_STATE,
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114
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115 NGX_HTTP_WRITING_REQUEST_STATE,
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116 NGX_HTTP_LINGERING_CLOSE_STATE,
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117 NGX_HTTP_KEEPALIVE_STATE
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118 } ngx_http_state_e;
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119
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120
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121 typedef struct {
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122 ngx_str_t name;
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123 ngx_uint_t offset;
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124 } ngx_http_header_t;
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125
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126
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127 typedef struct {
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128 ngx_list_t headers;
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129
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130 ngx_table_elt_t *host;
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131 ngx_table_elt_t *connection;
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132 ngx_table_elt_t *if_modified_since;
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133 ngx_table_elt_t *user_agent;
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134 ngx_table_elt_t *referer;
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135 ngx_table_elt_t *content_length;
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28
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136 ngx_table_elt_t *content_type;
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137
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138 ngx_table_elt_t *range;
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139
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140 #if (NGX_HTTP_GZIP)
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141 ngx_table_elt_t *accept_encoding;
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142 ngx_table_elt_t *via;
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143 #endif
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144
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145 ngx_table_elt_t *authorization;
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146
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147 ngx_table_elt_t *keep_alive;
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148
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149 #if (NGX_HTTP_PROXY)
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150 ngx_table_elt_t *x_forwarded_for;
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6
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151 ngx_table_elt_t *x_real_ip;
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152 ngx_table_elt_t *x_url;
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153 #endif
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154
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155 ngx_array_t cookies;
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156
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157 size_t host_name_len;
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158 ssize_t content_length_n;
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159 size_t connection_type;
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160 ssize_t keep_alive_n;
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161
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162 unsigned msie:1;
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163 unsigned msie4:1;
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164 unsigned opera:1;
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165 unsigned gecko:1;
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166 unsigned konqueror:1;
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167 } ngx_http_headers_in_t;
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168
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169
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170 typedef struct {
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171 off_t start;
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172 off_t end;
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173 ngx_str_t content_range;
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174 } ngx_http_range_t;
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175
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176
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177 typedef struct {
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178 ngx_list_t headers;
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179
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180 ngx_uint_t status;
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181 ngx_str_t status_line;
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182
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183 ngx_table_elt_t *server;
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184 ngx_table_elt_t *date;
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185 ngx_table_elt_t *content_type;
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186 ngx_table_elt_t *content_length;
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187 ngx_table_elt_t *content_encoding;
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188 ngx_table_elt_t *location;
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189 ngx_table_elt_t *last_modified;
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190 ngx_table_elt_t *content_range;
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191 ngx_table_elt_t *accept_ranges;
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192 ngx_table_elt_t *expires;
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193 ngx_table_elt_t *cache_control;
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194 ngx_table_elt_t *etag;
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195
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196 ngx_str_t charset;
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197 ngx_array_t ranges;
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198
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199 off_t content_length_n;
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200 time_t date_time;
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201 time_t last_modified_time;
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202 } ngx_http_headers_out_t;
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203
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204
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205 typedef void (*ngx_http_client_body_handler_pt)(ngx_http_request_t *r);
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206
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207 typedef struct {
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208 ngx_temp_file_t *temp_file;
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209 ngx_chain_t *bufs;
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210 ngx_buf_t *buf;
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211 size_t rest;
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212 ngx_http_client_body_handler_pt post_handler;
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213 } ngx_http_request_body_t;
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214
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215
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216 struct ngx_http_cleanup_s {
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217 union {
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218 struct {
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219 ngx_fd_t fd;
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220 u_char *name;
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221 } file;
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222
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223 struct {
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224 ngx_http_cache_hash_t *hash;
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225 ngx_http_cache_entry_t *cache;
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226 } cache;
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227 } data;
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228
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229 unsigned valid:1;
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230 unsigned cache:1;
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231 };
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232
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233
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234 typedef struct {
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235 ngx_http_request_t *request;
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236
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237 ngx_buf_t **busy;
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238 ngx_int_t nbusy;
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239
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240 ngx_buf_t **free;
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241 ngx_int_t nfree;
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242
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243 ngx_uint_t pipeline; /* unsigned pipeline:1; */
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244 } ngx_http_connection_t;
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245
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246
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247 typedef ngx_int_t (*ngx_http_handler_pt)(ngx_http_request_t *r);
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248
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249 struct ngx_http_request_s {
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250 uint32_t signature; /* "HTTP" */
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251
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252 ngx_connection_t *connection;
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253
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254 void **ctx;
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255 void **main_conf;
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256 void **srv_conf;
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257 void **loc_conf;
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258
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26
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259 ngx_http_cache_t *cache;
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0
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260
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261 ngx_http_upstream_t *upstream;
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262
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263 ngx_file_t file;
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264
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265 ngx_pool_t *pool;
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266 ngx_buf_t *header_in;
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267
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268 ngx_http_headers_in_t headers_in;
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269 ngx_http_headers_out_t headers_out;
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270
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271 ngx_http_request_body_t *request_body;
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272
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273 time_t lingering_time;
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274
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275 ngx_uint_t method;
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276 ngx_uint_t http_version;
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277 ngx_uint_t http_major;
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278 ngx_uint_t http_minor;
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279
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280 ngx_str_t request_line;
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281 ngx_str_t uri;
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282 ngx_str_t args;
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283 ngx_str_t exten;
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284 ngx_str_t unparsed_uri;
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285
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286 ngx_str_t method_name;
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287 ngx_str_t http_protocol;
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288
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289 ngx_http_request_t *main;
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290
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291 uint32_t in_addr;
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292 ngx_uint_t port;
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293 ngx_str_t *port_text; /* ":80" */
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294 ngx_str_t server_name;
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295 ngx_http_in_addr_t *virtual_names;
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296
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297 ngx_uint_t phase;
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298 ngx_int_t phase_handler;
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299 ngx_http_handler_pt content_handler;
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300
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301 ngx_array_t cleanup;
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302
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303 /* used to learn the Apache compatible response length without a header */
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304 size_t header_size;
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305
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306 size_t request_length;
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307
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308 u_char *discarded_buffer;
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309 void **err_ctx;
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310 ngx_uint_t err_status;
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311
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312 ngx_http_connection_t *http_connection;
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313
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314 unsigned http_state:4;
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315
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316 #if 0
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317 /* URI is not started with '/' - "GET http://" */
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318 unsigned unusual_uri:1;
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319 #endif
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2
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320 /* URI with "/." and on Win32 with "//" */
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321 unsigned complex_uri:1;
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2
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322 /* URI with "%" */
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323 unsigned quoted_uri:1;
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324 unsigned header_timeout_set:1;
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325
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326 unsigned proxy:1;
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327 unsigned bypass_cache:1;
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328 unsigned no_cache:1;
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329
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330 #if 0
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331 unsigned cachable:1;
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332 #endif
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333 unsigned pipeline:1;
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334
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335 unsigned plain_http:1;
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336 unsigned chunked:1;
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337 unsigned header_only:1;
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338 unsigned keepalive:1;
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339 unsigned lingering_close:1;
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340 unsigned closed:1;
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341
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342 unsigned filter_need_in_memory:1;
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343 unsigned filter_ssi_need_in_memory:1;
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344 unsigned filter_need_temporary:1;
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345 unsigned filter_allow_ranges:1;
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346
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347 #if (NGX_STAT_STUB)
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348 unsigned stat_reading:1;
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349 unsigned stat_writing:1;
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350 #endif
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351
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352 ngx_uint_t headers_n;
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353
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354 /* used to parse HTTP headers */
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355 ngx_uint_t state;
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356 u_char *uri_start;
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357 u_char *uri_end;
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358 u_char *uri_ext;
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359 u_char *args_start;
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360 u_char *request_start;
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361 u_char *request_end;
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362 u_char *method_end;
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363 u_char *schema_start;
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364 u_char *schema_end;
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365 u_char *host_start;
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366 u_char *host_end;
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367 u_char *port_start;
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368 u_char *port_end;
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369 u_char *header_name_start;
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370 u_char *header_name_end;
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371 u_char *header_start;
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372 u_char *header_end;
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373 };
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374
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375
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376 extern ngx_http_header_t ngx_http_headers_in[];
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377 extern ngx_http_header_t ngx_http_headers_out[];
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378
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379
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380
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381 #endif /* _NGX_HTTP_REQUEST_H_INCLUDED_ */
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