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0001 0002 /* 0003 * Copyright (C) Igor Sysoev 0004 * Copyright (C) Nginx, Inc. 0005 */ 0006 0007 0008 #ifndef _NGX_HTTP_REQUEST_H_INCLUDED_ 0009 #define _NGX_HTTP_REQUEST_H_INCLUDED_ 0010 0011 0012 #define NGX_HTTP_MAX_URI_CHANGES 10 0013 #define NGX_HTTP_MAX_SUBREQUESTS 50 0014 0015 /* must be 2^n */ 0016 #define NGX_HTTP_LC_HEADER_LEN 32 0017 0018 0019 #define NGX_HTTP_DISCARD_BUFFER_SIZE 4096 0020 #define NGX_HTTP_LINGERING_BUFFER_SIZE 4096 0021 0022 0023 #define NGX_HTTP_VERSION_9 9 0024 #define NGX_HTTP_VERSION_10 1000 0025 #define NGX_HTTP_VERSION_11 1001 0026 #define NGX_HTTP_VERSION_20 2000 0027 0028 #define NGX_HTTP_UNKNOWN 0x0001 0029 #define NGX_HTTP_GET 0x0002 0030 #define NGX_HTTP_HEAD 0x0004 0031 #define NGX_HTTP_POST 0x0008 0032 #define NGX_HTTP_PUT 0x0010 0033 #define NGX_HTTP_DELETE 0x0020 0034 #define NGX_HTTP_MKCOL 0x0040 0035 #define NGX_HTTP_COPY 0x0080 0036 #define NGX_HTTP_MOVE 0x0100 0037 #define NGX_HTTP_OPTIONS 0x0200 0038 #define NGX_HTTP_PROPFIND 0x0400 0039 #define NGX_HTTP_PROPPATCH 0x0800 0040 #define NGX_HTTP_LOCK 0x1000 0041 #define NGX_HTTP_UNLOCK 0x2000 0042 #define NGX_HTTP_PATCH 0x4000 0043 #define NGX_HTTP_TRACE 0x8000 0044 0045 #define NGX_HTTP_CONNECTION_CLOSE 1 0046 #define NGX_HTTP_CONNECTION_KEEP_ALIVE 2 0047 0048 0049 #define NGX_NONE 1 0050 0051 0052 #define NGX_HTTP_PARSE_HEADER_DONE 1 0053 0054 #define NGX_HTTP_CLIENT_ERROR 10 0055 #define NGX_HTTP_PARSE_INVALID_METHOD 10 0056 #define NGX_HTTP_PARSE_INVALID_REQUEST 11 0057 #define NGX_HTTP_PARSE_INVALID_VERSION 12 0058 #define NGX_HTTP_PARSE_INVALID_09_METHOD 13 0059 0060 #define NGX_HTTP_PARSE_INVALID_HEADER 14 0061 0062 0063 /* unused 1 */ 0064 #define NGX_HTTP_SUBREQUEST_IN_MEMORY 2 0065 #define NGX_HTTP_SUBREQUEST_WAITED 4 0066 #define NGX_HTTP_SUBREQUEST_CLONE 8 0067 #define NGX_HTTP_SUBREQUEST_BACKGROUND 16 0068 0069 #define NGX_HTTP_LOG_UNSAFE 1 0070 0071 0072 #define NGX_HTTP_CONTINUE 100 0073 #define NGX_HTTP_SWITCHING_PROTOCOLS 101 0074 #define NGX_HTTP_PROCESSING 102 0075 0076 #define NGX_HTTP_OK 200 0077 #define NGX_HTTP_CREATED 201 0078 #define NGX_HTTP_ACCEPTED 202 0079 #define NGX_HTTP_NO_CONTENT 204 0080 #define NGX_HTTP_PARTIAL_CONTENT 206 0081 0082 #define NGX_HTTP_SPECIAL_RESPONSE 300 0083 #define NGX_HTTP_MOVED_PERMANENTLY 301 0084 #define NGX_HTTP_MOVED_TEMPORARILY 302 0085 #define NGX_HTTP_SEE_OTHER 303 0086 #define NGX_HTTP_NOT_MODIFIED 304 0087 #define NGX_HTTP_TEMPORARY_REDIRECT 307 0088 #define NGX_HTTP_PERMANENT_REDIRECT 308 0089 0090 #define NGX_HTTP_BAD_REQUEST 400 0091 #define NGX_HTTP_UNAUTHORIZED 401 0092 #define NGX_HTTP_FORBIDDEN 403 0093 #define NGX_HTTP_NOT_FOUND 404 0094 #define NGX_HTTP_NOT_ALLOWED 405 0095 #define NGX_HTTP_REQUEST_TIME_OUT 408 0096 #define NGX_HTTP_CONFLICT 409 0097 #define NGX_HTTP_LENGTH_REQUIRED 411 0098 #define NGX_HTTP_PRECONDITION_FAILED 412 0099 #define NGX_HTTP_REQUEST_ENTITY_TOO_LARGE 413 0100 #define NGX_HTTP_REQUEST_URI_TOO_LARGE 414 0101 #define NGX_HTTP_UNSUPPORTED_MEDIA_TYPE 415 0102 #define NGX_HTTP_RANGE_NOT_SATISFIABLE 416 0103 #define NGX_HTTP_MISDIRECTED_REQUEST 421 0104 #define NGX_HTTP_TOO_MANY_REQUESTS 429 0105 0106 0107 /* Our own HTTP codes */ 0108 0109 /* The special code to close connection without any response */ 0110 #define NGX_HTTP_CLOSE 444 0111 0112 #define NGX_HTTP_NGINX_CODES 494 0113 0114 #define NGX_HTTP_REQUEST_HEADER_TOO_LARGE 494 0115 0116 #define NGX_HTTPS_CERT_ERROR 495 0117 #define NGX_HTTPS_NO_CERT 496 0118 0119 /* 0120 * We use the special code for the plain HTTP requests that are sent to 0121 * HTTPS port to distinguish it from 4XX in an error page redirection 0122 */ 0123 #define NGX_HTTP_TO_HTTPS 497 0124 0125 /* 498 is the canceled code for the requests with invalid host name */ 0126 0127 /* 0128 * HTTP does not define the code for the case when a client closed 0129 * the connection while we are processing its request so we introduce 0130 * own code to log such situation when a client has closed the connection 0131 * before we even try to send the HTTP header to it 0132 */ 0133 #define NGX_HTTP_CLIENT_CLOSED_REQUEST 499 0134 0135 0136 #define NGX_HTTP_INTERNAL_SERVER_ERROR 500 0137 #define NGX_HTTP_NOT_IMPLEMENTED 501 0138 #define NGX_HTTP_BAD_GATEWAY 502 0139 #define NGX_HTTP_SERVICE_UNAVAILABLE 503 0140 #define NGX_HTTP_GATEWAY_TIME_OUT 504 0141 #define NGX_HTTP_VERSION_NOT_SUPPORTED 505 0142 #define NGX_HTTP_INSUFFICIENT_STORAGE 507 0143 0144 0145 #define NGX_HTTP_LOWLEVEL_BUFFERED 0xf0 0146 #define NGX_HTTP_WRITE_BUFFERED 0x10 0147 #define NGX_HTTP_GZIP_BUFFERED 0x20 0148 #define NGX_HTTP_SSI_BUFFERED 0x01 0149 #define NGX_HTTP_SUB_BUFFERED 0x02 0150 #define NGX_HTTP_COPY_BUFFERED 0x04 0151 0152 0153 typedef enum { 0154 NGX_HTTP_INITING_REQUEST_STATE = 0, 0155 NGX_HTTP_READING_REQUEST_STATE, 0156 NGX_HTTP_PROCESS_REQUEST_STATE, 0157 0158 NGX_HTTP_CONNECT_UPSTREAM_STATE, 0159 NGX_HTTP_WRITING_UPSTREAM_STATE, 0160 NGX_HTTP_READING_UPSTREAM_STATE, 0161 0162 NGX_HTTP_WRITING_REQUEST_STATE, 0163 NGX_HTTP_LINGERING_CLOSE_STATE, 0164 NGX_HTTP_KEEPALIVE_STATE 0165 } ngx_http_state_e; 0166 0167 0168 typedef struct { 0169 ngx_str_t name; 0170 ngx_uint_t offset; 0171 ngx_http_header_handler_pt handler; 0172 } ngx_http_header_t; 0173 0174 0175 typedef struct { 0176 ngx_str_t name; 0177 ngx_uint_t offset; 0178 } ngx_http_header_out_t; 0179 0180 0181 typedef struct { 0182 ngx_list_t headers; 0183 0184 ngx_table_elt_t *host; 0185 ngx_table_elt_t *connection; 0186 ngx_table_elt_t *if_modified_since; 0187 ngx_table_elt_t *if_unmodified_since; 0188 ngx_table_elt_t *if_match; 0189 ngx_table_elt_t *if_none_match; 0190 ngx_table_elt_t *user_agent; 0191 ngx_table_elt_t *referer; 0192 ngx_table_elt_t *content_length; 0193 ngx_table_elt_t *content_range; 0194 ngx_table_elt_t *content_type; 0195 0196 ngx_table_elt_t *range; 0197 ngx_table_elt_t *if_range; 0198 0199 ngx_table_elt_t *transfer_encoding; 0200 ngx_table_elt_t *expect; 0201 ngx_table_elt_t *upgrade; 0202 0203 #if (NGX_HTTP_GZIP) 0204 ngx_table_elt_t *accept_encoding; 0205 ngx_table_elt_t *via; 0206 #endif 0207 0208 ngx_table_elt_t *authorization; 0209 0210 ngx_table_elt_t *keep_alive; 0211 0212 #if (NGX_HTTP_X_FORWARDED_FOR) 0213 ngx_array_t x_forwarded_for; 0214 #endif 0215 0216 #if (NGX_HTTP_REALIP) 0217 ngx_table_elt_t *x_real_ip; 0218 #endif 0219 0220 #if (NGX_HTTP_HEADERS) 0221 ngx_table_elt_t *accept; 0222 ngx_table_elt_t *accept_language; 0223 #endif 0224 0225 #if (NGX_HTTP_DAV) 0226 ngx_table_elt_t *depth; 0227 ngx_table_elt_t *destination; 0228 ngx_table_elt_t *overwrite; 0229 ngx_table_elt_t *date; 0230 #endif 0231 0232 ngx_str_t user; 0233 ngx_str_t passwd; 0234 0235 ngx_array_t cookies; 0236 0237 ngx_str_t server; 0238 off_t content_length_n; 0239 time_t keep_alive_n; 0240 0241 unsigned connection_type:2; 0242 unsigned chunked:1; 0243 unsigned msie:1; 0244 unsigned msie6:1; 0245 unsigned opera:1; 0246 unsigned gecko:1; 0247 unsigned chrome:1; 0248 unsigned safari:1; 0249 unsigned konqueror:1; 0250 } ngx_http_headers_in_t; 0251 0252 0253 typedef struct { 0254 ngx_list_t headers; 0255 ngx_list_t trailers; 0256 0257 ngx_uint_t status; 0258 ngx_str_t status_line; 0259 0260 ngx_table_elt_t *server; 0261 ngx_table_elt_t *date; 0262 ngx_table_elt_t *content_length; 0263 ngx_table_elt_t *content_encoding; 0264 ngx_table_elt_t *location; 0265 ngx_table_elt_t *refresh; 0266 ngx_table_elt_t *last_modified; 0267 ngx_table_elt_t *content_range; 0268 ngx_table_elt_t *accept_ranges; 0269 ngx_table_elt_t *www_authenticate; 0270 ngx_table_elt_t *expires; 0271 ngx_table_elt_t *etag; 0272 0273 ngx_str_t *override_charset; 0274 0275 size_t content_type_len; 0276 ngx_str_t content_type; 0277 ngx_str_t charset; 0278 u_char *content_type_lowcase; 0279 ngx_uint_t content_type_hash; 0280 0281 ngx_array_t cache_control; 0282 0283 off_t content_length_n; 0284 off_t content_offset; 0285 time_t date_time; 0286 time_t last_modified_time; 0287 } ngx_http_headers_out_t; 0288 0289 0290 typedef void (*ngx_http_client_body_handler_pt)(ngx_http_request_t *r); 0291 0292 typedef struct { 0293 ngx_temp_file_t *temp_file; 0294 ngx_chain_t *bufs; 0295 ngx_buf_t *buf; 0296 off_t rest; 0297 off_t received; 0298 ngx_chain_t *free; 0299 ngx_chain_t *busy; 0300 ngx_http_chunked_t *chunked; 0301 ngx_http_client_body_handler_pt post_handler; 0302 } ngx_http_request_body_t; 0303 0304 0305 typedef struct ngx_http_addr_conf_s ngx_http_addr_conf_t; 0306 0307 typedef struct { 0308 ngx_http_addr_conf_t *addr_conf; 0309 ngx_http_conf_ctx_t *conf_ctx; 0310 0311 #if (NGX_HTTP_SSL || NGX_COMPAT) 0312 ngx_str_t *ssl_servername; 0313 #if (NGX_PCRE) 0314 ngx_http_regex_t *ssl_servername_regex; 0315 #endif 0316 #endif 0317 0318 ngx_chain_t *busy; 0319 ngx_int_t nbusy; 0320 0321 ngx_chain_t *free; 0322 0323 unsigned ssl:1; 0324 unsigned proxy_protocol:1; 0325 } ngx_http_connection_t; 0326 0327 0328 typedef void (*ngx_http_cleanup_pt)(void *data); 0329 0330 typedef struct ngx_http_cleanup_s ngx_http_cleanup_t; 0331 0332 struct ngx_http_cleanup_s { 0333 ngx_http_cleanup_pt handler; 0334 void *data; 0335 ngx_http_cleanup_t *next; 0336 }; 0337 0338 0339 typedef ngx_int_t (*ngx_http_post_subrequest_pt)(ngx_http_request_t *r, 0340 void *data, ngx_int_t rc); 0341 0342 typedef struct { 0343 ngx_http_post_subrequest_pt handler; 0344 void *data; 0345 } ngx_http_post_subrequest_t; 0346 0347 0348 typedef struct ngx_http_postponed_request_s ngx_http_postponed_request_t; 0349 0350 struct ngx_http_postponed_request_s { 0351 ngx_http_request_t *request; 0352 ngx_chain_t *out; 0353 ngx_http_postponed_request_t *next; 0354 }; 0355 0356 0357 typedef struct ngx_http_posted_request_s ngx_http_posted_request_t; 0358 0359 struct ngx_http_posted_request_s { 0360 ngx_http_request_t *request; 0361 ngx_http_posted_request_t *next; 0362 }; 0363 0364 0365 typedef ngx_int_t (*ngx_http_handler_pt)(ngx_http_request_t *r); 0366 typedef void (*ngx_http_event_handler_pt)(ngx_http_request_t *r); 0367 0368 0369 struct ngx_http_request_s { 0370 uint32_t signature; /* "HTTP" */ 0371 0372 ngx_connection_t *connection; 0373 0374 void **ctx; 0375 void **main_conf; 0376 void **srv_conf; 0377 void **loc_conf; 0378 0379 ngx_http_event_handler_pt read_event_handler; 0380 ngx_http_event_handler_pt write_event_handler; 0381 0382 #if (NGX_HTTP_CACHE) 0383 ngx_http_cache_t *cache; 0384 #endif 0385 0386 ngx_http_upstream_t *upstream; 0387 ngx_array_t *upstream_states; 0388 /* of ngx_http_upstream_state_t */ 0389 0390 ngx_pool_t *pool; 0391 ngx_buf_t *header_in; 0392 0393 ngx_http_headers_in_t headers_in; 0394 ngx_http_headers_out_t headers_out; 0395 0396 ngx_http_request_body_t *request_body; 0397 0398 time_t lingering_time; 0399 time_t start_sec; 0400 ngx_msec_t start_msec; 0401 0402 ngx_uint_t method; 0403 ngx_uint_t http_version; 0404 0405 ngx_str_t request_line; 0406 ngx_str_t uri; 0407 ngx_str_t args; 0408 ngx_str_t exten; 0409 ngx_str_t unparsed_uri; 0410 0411 ngx_str_t method_name; 0412 ngx_str_t http_protocol; 0413 0414 ngx_chain_t *out; 0415 ngx_http_request_t *main; 0416 ngx_http_request_t *parent; 0417 ngx_http_postponed_request_t *postponed; 0418 ngx_http_post_subrequest_t *post_subrequest; 0419 ngx_http_posted_request_t *posted_requests; 0420 0421 ngx_int_t phase_handler; 0422 ngx_http_handler_pt content_handler; 0423 ngx_uint_t access_code; 0424 0425 ngx_http_variable_value_t *variables; 0426 0427 #if (NGX_PCRE) 0428 ngx_uint_t ncaptures; 0429 int *captures; 0430 u_char *captures_data; 0431 #endif 0432 0433 size_t limit_rate; 0434 size_t limit_rate_after; 0435 0436 /* used to learn the Apache compatible response length without a header */ 0437 size_t header_size; 0438 0439 off_t request_length; 0440 0441 ngx_uint_t err_status; 0442 0443 ngx_http_connection_t *http_connection; 0444 ngx_http_v2_stream_t *stream; 0445 0446 ngx_http_log_handler_pt log_handler; 0447 0448 ngx_http_cleanup_t *cleanup; 0449 0450 unsigned count:16; 0451 unsigned subrequests:8; 0452 unsigned blocked:8; 0453 0454 unsigned aio:1; 0455 0456 unsigned http_state:4; 0457 0458 /* URI with "/." and on Win32 with "//" */ 0459 unsigned complex_uri:1; 0460 0461 /* URI with "%" */ 0462 unsigned quoted_uri:1; 0463 0464 /* URI with "+" */ 0465 unsigned plus_in_uri:1; 0466 0467 /* URI with " " */ 0468 unsigned space_in_uri:1; 0469 0470 unsigned invalid_header:1; 0471 0472 unsigned add_uri_to_alias:1; 0473 unsigned valid_location:1; 0474 unsigned valid_unparsed_uri:1; 0475 unsigned uri_changed:1; 0476 unsigned uri_changes:4; 0477 0478 unsigned request_body_in_single_buf:1; 0479 unsigned request_body_in_file_only:1; 0480 unsigned request_body_in_persistent_file:1; 0481 unsigned request_body_in_clean_file:1; 0482 unsigned request_body_file_group_access:1; 0483 unsigned request_body_file_log_level:3; 0484 unsigned request_body_no_buffering:1; 0485 0486 unsigned subrequest_in_memory:1; 0487 unsigned waited:1; 0488 0489 #if (NGX_HTTP_CACHE) 0490 unsigned cached:1; 0491 #endif 0492 0493 #if (NGX_HTTP_GZIP) 0494 unsigned gzip_tested:1; 0495 unsigned gzip_ok:1; 0496 unsigned gzip_vary:1; 0497 #endif 0498 0499 unsigned proxy:1; 0500 unsigned bypass_cache:1; 0501 unsigned no_cache:1; 0502 0503 /* 0504 * instead of using the request context data in 0505 * ngx_http_limit_conn_module and ngx_http_limit_req_module 0506 * we use the single bits in the request structure 0507 */ 0508 unsigned limit_conn_set:1; 0509 unsigned limit_req_set:1; 0510 0511 #if 0 0512 unsigned cacheable:1; 0513 #endif 0514 0515 unsigned pipeline:1; 0516 unsigned chunked:1; 0517 unsigned header_only:1; 0518 unsigned expect_trailers:1; 0519 unsigned keepalive:1; 0520 unsigned lingering_close:1; 0521 unsigned discard_body:1; 0522 unsigned reading_body:1; 0523 unsigned internal:1; 0524 unsigned error_page:1; 0525 unsigned filter_finalize:1; 0526 unsigned post_action:1; 0527 unsigned request_complete:1; 0528 unsigned request_output:1; 0529 unsigned header_sent:1; 0530 unsigned expect_tested:1; 0531 unsigned root_tested:1; 0532 unsigned done:1; 0533 unsigned logged:1; 0534 0535 unsigned buffered:4; 0536 0537 unsigned main_filter_need_in_memory:1; 0538 unsigned filter_need_in_memory:1; 0539 unsigned filter_need_temporary:1; 0540 unsigned allow_ranges:1; 0541 unsigned subrequest_ranges:1; 0542 unsigned single_range:1; 0543 unsigned disable_not_modified:1; 0544 unsigned stat_reading:1; 0545 unsigned stat_writing:1; 0546 unsigned stat_processing:1; 0547 0548 unsigned background:1; 0549 unsigned health_check:1; 0550 0551 /* used to parse HTTP headers */ 0552 0553 ngx_uint_t state; 0554 0555 ngx_uint_t header_hash; 0556 ngx_uint_t lowcase_index; 0557 u_char lowcase_header[NGX_HTTP_LC_HEADER_LEN]; 0558 0559 u_char *header_name_start; 0560 u_char *header_name_end; 0561 u_char *header_start; 0562 u_char *header_end; 0563 0564 /* 0565 * a memory that can be reused after parsing a request line 0566 * via ngx_http_ephemeral_t 0567 */ 0568 0569 u_char *uri_start; 0570 u_char *uri_end; 0571 u_char *uri_ext; 0572 u_char *args_start; 0573 u_char *request_start; 0574 u_char *request_end; 0575 u_char *method_end; 0576 u_char *schema_start; 0577 u_char *schema_end; 0578 u_char *host_start; 0579 u_char *host_end; 0580 u_char *port_start; 0581 u_char *port_end; 0582 0583 unsigned http_minor:16; 0584 unsigned http_major:16; 0585 }; 0586 0587 0588 typedef struct { 0589 ngx_http_posted_request_t terminal_posted_request; 0590 } ngx_http_ephemeral_t; 0591 0592 0593 #define ngx_http_ephemeral(r) (void *) (&r->uri_start) 0594 0595 0596 extern ngx_http_header_t ngx_http_headers_in[]; 0597 extern ngx_http_header_out_t ngx_http_headers_out[]; 0598 0599 0600 #define ngx_http_set_log_request(log, r) \ 0601 ((ngx_http_log_ctx_t *) log->data)->current_request = r 0602 0603 0604 #endif /* _NGX_HTTP_REQUEST_H_INCLUDED_ */
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