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ngx_http_request.h
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/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#ifndef _NGX_HTTP_REQUEST_H_INCLUDED_
#define _NGX_HTTP_REQUEST_H_INCLUDED_
#define NGX_HTTP_MAX_URI_CHANGES 10
#define NGX_HTTP_MAX_SUBREQUESTS 50
/* must be 2^n */
#define NGX_HTTP_LC_HEADER_LEN 32
#define NGX_HTTP_DISCARD_BUFFER_SIZE 4096
#define NGX_HTTP_LINGERING_BUFFER_SIZE 4096
#define NGX_HTTP_VERSION_9 9
#define NGX_HTTP_VERSION_10 1000
#define NGX_HTTP_VERSION_11 1001
#define NGX_HTTP_VERSION_20 2000
#define NGX_HTTP_UNKNOWN 0x0001
#define NGX_HTTP_GET 0x0002
#define NGX_HTTP_HEAD 0x0004
#define NGX_HTTP_POST 0x0008
#define NGX_HTTP_PUT 0x0010
#define NGX_HTTP_DELETE 0x0020
#define NGX_HTTP_MKCOL 0x0040
#define NGX_HTTP_COPY 0x0080
#define NGX_HTTP_MOVE 0x0100
#define NGX_HTTP_OPTIONS 0x0200
#define NGX_HTTP_PROPFIND 0x0400
#define NGX_HTTP_PROPPATCH 0x0800
#define NGX_HTTP_LOCK 0x1000
#define NGX_HTTP_UNLOCK 0x2000
#define NGX_HTTP_PATCH 0x4000
#define NGX_HTTP_TRACE 0x8000
#if (NGX_HTTP_PROXY_CONNECT)
#define NGX_HTTP_CONNECT 0x10000
#endif
#define NGX_HTTP_CONNECTION_CLOSE 1
#define NGX_HTTP_CONNECTION_KEEP_ALIVE 2
#define NGX_NONE 1
#define NGX_HTTP_PARSE_HEADER_DONE 1
#define NGX_HTTP_CLIENT_ERROR 10
#define NGX_HTTP_PARSE_INVALID_METHOD 10
#define NGX_HTTP_PARSE_INVALID_REQUEST 11
#define NGX_HTTP_PARSE_INVALID_VERSION 12
#define NGX_HTTP_PARSE_INVALID_09_METHOD 13
#define NGX_HTTP_PARSE_INVALID_HEADER 14
/* unused 1 */
#define NGX_HTTP_SUBREQUEST_IN_MEMORY 2
#define NGX_HTTP_SUBREQUEST_WAITED 4
#define NGX_HTTP_SUBREQUEST_CLONE 8
#define NGX_HTTP_SUBREQUEST_BACKGROUND 16
#define NGX_HTTP_LOG_UNSAFE 1
#define NGX_HTTP_CONTINUE 100
#define NGX_HTTP_SWITCHING_PROTOCOLS 101
#define NGX_HTTP_PROCESSING 102
#define NGX_HTTP_OK 200
#define NGX_HTTP_CREATED 201
#define NGX_HTTP_ACCEPTED 202
#define NGX_HTTP_NO_CONTENT 204
#define NGX_HTTP_PARTIAL_CONTENT 206
#define NGX_HTTP_SPECIAL_RESPONSE 300
#define NGX_HTTP_MOVED_PERMANENTLY 301
#define NGX_HTTP_MOVED_TEMPORARILY 302
#define NGX_HTTP_SEE_OTHER 303
#define NGX_HTTP_NOT_MODIFIED 304
#define NGX_HTTP_TEMPORARY_REDIRECT 307
#define NGX_HTTP_PERMANENT_REDIRECT 308
#define NGX_HTTP_BAD_REQUEST 400
#define NGX_HTTP_UNAUTHORIZED 401
#define NGX_HTTP_FORBIDDEN 403
#define NGX_HTTP_NOT_FOUND 404
#define NGX_HTTP_NOT_ALLOWED 405
#define NGX_HTTP_REQUEST_TIME_OUT 408
#define NGX_HTTP_CONFLICT 409
#define NGX_HTTP_LENGTH_REQUIRED 411
#define NGX_HTTP_PRECONDITION_FAILED 412
#define NGX_HTTP_REQUEST_ENTITY_TOO_LARGE 413
#define NGX_HTTP_REQUEST_URI_TOO_LARGE 414
#define NGX_HTTP_UNSUPPORTED_MEDIA_TYPE 415
#define NGX_HTTP_RANGE_NOT_SATISFIABLE 416
#define NGX_HTTP_MISDIRECTED_REQUEST 421
#define NGX_HTTP_TOO_MANY_REQUESTS 429
/* Our own HTTP codes */
/* The special code to close connection without any response */
#define NGX_HTTP_CLOSE 444
#define NGX_HTTP_NGINX_CODES 494
#define NGX_HTTP_REQUEST_HEADER_TOO_LARGE 494
#define NGX_HTTPS_CERT_ERROR 495
#define NGX_HTTPS_NO_CERT 496
/*
* We use the special code for the plain HTTP requests that are sent to
* HTTPS port to distinguish it from 4XX in an error page redirection
*/
#define NGX_HTTP_TO_HTTPS 497
/* 498 is the canceled code for the requests with invalid host name */
/*
* HTTP does not define the code for the case when a client closed
* the connection while we are processing its request so we introduce
* own code to log such situation when a client has closed the connection
* before we even try to send the HTTP header to it
*/
#define NGX_HTTP_CLIENT_CLOSED_REQUEST 499
#define NGX_HTTP_INTERNAL_SERVER_ERROR 500
#define NGX_HTTP_NOT_IMPLEMENTED 501
#define NGX_HTTP_BAD_GATEWAY 502
#define NGX_HTTP_SERVICE_UNAVAILABLE 503
#define NGX_HTTP_GATEWAY_TIME_OUT 504
#define NGX_HTTP_VERSION_NOT_SUPPORTED 505
#define NGX_HTTP_INSUFFICIENT_STORAGE 507
#define NGX_HTTP_LOWLEVEL_BUFFERED 0xf0
#define NGX_HTTP_WRITE_BUFFERED 0x10
#define NGX_HTTP_GZIP_BUFFERED 0x20
#define NGX_HTTP_SSI_BUFFERED 0x01
#define NGX_HTTP_SUB_BUFFERED 0x02
#define NGX_HTTP_COPY_BUFFERED 0x04
typedef enum {
NGX_HTTP_INITING_REQUEST_STATE = 0,
NGX_HTTP_READING_REQUEST_STATE,
NGX_HTTP_PROCESS_REQUEST_STATE,
NGX_HTTP_CONNECT_UPSTREAM_STATE,
NGX_HTTP_WRITING_UPSTREAM_STATE,
NGX_HTTP_READING_UPSTREAM_STATE,
NGX_HTTP_WRITING_REQUEST_STATE,
NGX_HTTP_LINGERING_CLOSE_STATE,
NGX_HTTP_KEEPALIVE_STATE
} ngx_http_state_e;
typedef struct {
ngx_str_t name;
ngx_uint_t offset;
ngx_http_header_handler_pt handler;
} ngx_http_header_t;
typedef struct {
ngx_str_t name;
ngx_uint_t offset;
} ngx_http_header_out_t;
typedef struct {
ngx_list_t headers;
ngx_table_elt_t *host;
ngx_table_elt_t *connection;
ngx_table_elt_t *if_modified_since;
ngx_table_elt_t *if_unmodified_since;
ngx_table_elt_t *if_match;
ngx_table_elt_t *if_none_match;
ngx_table_elt_t *user_agent;
ngx_table_elt_t *referer;
ngx_table_elt_t *content_length;
ngx_table_elt_t *content_range;
ngx_table_elt_t *content_type;
ngx_table_elt_t *range;
ngx_table_elt_t *if_range;
ngx_table_elt_t *transfer_encoding;
ngx_table_elt_t *te;
ngx_table_elt_t *expect;
ngx_table_elt_t *upgrade;
#if (NGX_HTTP_GZIP || NGX_HTTP_HEADERS)
ngx_table_elt_t *accept_encoding;
ngx_table_elt_t *via;
#endif
ngx_table_elt_t *authorization;
ngx_table_elt_t *keep_alive;
#if (NGX_HTTP_X_FORWARDED_FOR)
ngx_array_t x_forwarded_for;
#endif
#if (NGX_HTTP_REALIP)
ngx_table_elt_t *x_real_ip;
#endif
#if (NGX_HTTP_HEADERS)
ngx_table_elt_t *accept;
ngx_table_elt_t *accept_language;
#endif
#if (NGX_HTTP_DAV)
ngx_table_elt_t *depth;
ngx_table_elt_t *destination;
ngx_table_elt_t *overwrite;
ngx_table_elt_t *date;
#endif
ngx_str_t user;
ngx_str_t passwd;
ngx_array_t cookies;
ngx_str_t server;
off_t content_length_n;
time_t keep_alive_n;
unsigned connection_type:2;
unsigned chunked:1;
unsigned msie:1;
unsigned msie6:1;
unsigned opera:1;
unsigned gecko:1;
unsigned chrome:1;
unsigned safari:1;
unsigned konqueror:1;
} ngx_http_headers_in_t;
typedef struct {
ngx_list_t headers;
ngx_list_t trailers;
ngx_uint_t status;
ngx_str_t status_line;
ngx_table_elt_t *server;
ngx_table_elt_t *date;
ngx_table_elt_t *content_length;
ngx_table_elt_t *content_encoding;
ngx_table_elt_t *location;
ngx_table_elt_t *refresh;
ngx_table_elt_t *last_modified;
ngx_table_elt_t *content_range;
ngx_table_elt_t *accept_ranges;
ngx_table_elt_t *www_authenticate;
ngx_table_elt_t *expires;
ngx_table_elt_t *etag;
ngx_str_t *override_charset;
size_t content_type_len;
ngx_str_t content_type;
ngx_str_t charset;
u_char *content_type_lowcase;
ngx_uint_t content_type_hash;
ngx_array_t cache_control;
ngx_array_t link;
off_t content_length_n;
off_t content_offset;
time_t date_time;
time_t last_modified_time;
} ngx_http_headers_out_t;
typedef void (*ngx_http_client_body_handler_pt)(ngx_http_request_t *r);
typedef struct {
ngx_temp_file_t *temp_file;
ngx_chain_t *bufs;
ngx_buf_t *buf;
off_t rest;
off_t received;
ngx_chain_t *free;
ngx_chain_t *busy;
ngx_http_chunked_t *chunked;
ngx_http_client_body_handler_pt post_handler;
} ngx_http_request_body_t;
typedef struct ngx_http_addr_conf_s ngx_http_addr_conf_t;
typedef struct {
ngx_http_addr_conf_t *addr_conf;
ngx_http_conf_ctx_t *conf_ctx;
#if (NGX_HTTP_SSL || NGX_COMPAT)
ngx_str_t *ssl_servername;
#if (NGX_PCRE)
ngx_http_regex_t *ssl_servername_regex;
#endif
#endif
ngx_chain_t *busy;
ngx_int_t nbusy;
ngx_chain_t *free;
unsigned ssl:1;
unsigned proxy_protocol:1;
} ngx_http_connection_t;
typedef void (*ngx_http_cleanup_pt)(void *data);
typedef struct ngx_http_cleanup_s ngx_http_cleanup_t;
struct ngx_http_cleanup_s {
ngx_http_cleanup_pt handler;
void *data;
ngx_http_cleanup_t *next;
};
typedef ngx_int_t (*ngx_http_post_subrequest_pt)(ngx_http_request_t *r,
void *data, ngx_int_t rc);
typedef struct {
ngx_http_post_subrequest_pt handler;
void *data;
} ngx_http_post_subrequest_t;
typedef struct ngx_http_postponed_request_s ngx_http_postponed_request_t;
struct ngx_http_postponed_request_s {
ngx_http_request_t *request;
ngx_chain_t *out;
ngx_http_postponed_request_t *next;
};
typedef struct ngx_http_posted_request_s ngx_http_posted_request_t;
struct ngx_http_posted_request_s {
ngx_http_request_t *request;
ngx_http_posted_request_t *next;
};
typedef ngx_int_t (*ngx_http_handler_pt)(ngx_http_request_t *r);
typedef void (*ngx_http_event_handler_pt)(ngx_http_request_t *r);
struct ngx_http_request_s {
uint32_t signature; /* "HTTP" */
ngx_connection_t *connection;
void **ctx;
void **main_conf;
void **srv_conf;
void **loc_conf;
ngx_http_event_handler_pt read_event_handler;
ngx_http_event_handler_pt write_event_handler;
#if (NGX_HTTP_CACHE)
ngx_http_cache_t *cache;
#endif
ngx_http_upstream_t *upstream;
ngx_array_t *upstream_states;
/* of ngx_http_upstream_state_t */
ngx_pool_t *pool;
ngx_buf_t *header_in;
ngx_http_headers_in_t headers_in;
ngx_http_headers_out_t headers_out;
ngx_http_request_body_t *request_body;
time_t lingering_time;
time_t start_sec;
ngx_msec_t start_msec;
#if (T_NGX_RET_CACHE)
ngx_usec_t start_usec;
#endif
ngx_uint_t method;
ngx_uint_t http_version;
ngx_str_t request_line;
#if (T_NGX_VARS)
ngx_str_t raw_uri;
#endif
ngx_str_t uri;
ngx_str_t args;
ngx_str_t exten;
ngx_str_t unparsed_uri;
#if (NGX_HTTP_PROXY_CONNECT)
ngx_str_t connect_host;
ngx_str_t connect_port;
in_port_t connect_port_n;
u_char *connect_host_start;
u_char *connect_host_end;
u_char *connect_port_end;
#endif
ngx_str_t method_name;
ngx_str_t http_protocol;
ngx_str_t schema;
ngx_chain_t *out;
ngx_http_request_t *main;
ngx_http_request_t *parent;
ngx_http_postponed_request_t *postponed;
ngx_http_post_subrequest_t *post_subrequest;
ngx_http_posted_request_t *posted_requests;
ngx_int_t phase_handler;
ngx_http_handler_pt content_handler;
ngx_uint_t access_code;
ngx_http_variable_value_t *variables;
#if (NGX_PCRE)
ngx_uint_t ncaptures;
int *captures;
u_char *captures_data;
#endif
size_t limit_rate;
size_t limit_rate_after;
/* used to learn the Apache compatible response length without a header */
size_t header_size;
off_t request_length;
ngx_uint_t err_status;
ngx_http_connection_t *http_connection;
ngx_http_v2_stream_t *stream;
ngx_http_log_handler_pt log_handler;
ngx_http_cleanup_t *cleanup;
unsigned count:16;
unsigned subrequests:8;
unsigned blocked:8;
unsigned aio:1;
unsigned http_state:4;
/* URI with "/." and on Win32 with "//" */
unsigned complex_uri:1;
/* URI with "%" */
unsigned quoted_uri:1;
/* URI with "+" */
unsigned plus_in_uri:1;
/* URI with " " */
unsigned space_in_uri:1;
unsigned invalid_header:1;
unsigned add_uri_to_alias:1;
unsigned valid_location:1;
unsigned valid_unparsed_uri:1;
unsigned uri_changed:1;
unsigned uri_changes:4;
unsigned request_body_in_single_buf:1;
unsigned request_body_in_file_only:1;
unsigned request_body_in_persistent_file:1;
unsigned request_body_in_clean_file:1;
unsigned request_body_file_group_access:1;
unsigned request_body_file_log_level:3;
unsigned request_body_no_buffering:1;
unsigned subrequest_in_memory:1;
unsigned waited:1;
#if (NGX_HTTP_CACHE)
unsigned cached:1;
#endif
#if (NGX_HTTP_GZIP)
unsigned gzip_tested:1;
unsigned gzip_ok:1;
unsigned gzip_vary:1;
#endif
#if (NGX_PCRE)
unsigned realloc_captures:1;
#endif
unsigned proxy:1;
unsigned bypass_cache:1;
unsigned no_cache:1;
/*
* instead of using the request context data in
* ngx_http_limit_conn_module and ngx_http_limit_req_module
* we use the bit fields in the request structure
*/
unsigned limit_conn_status:2;
unsigned limit_req_status:3;
unsigned limit_rate_set:1;
unsigned limit_rate_after_set:1;
#if (T_NGX_HTTP_SYSGUARD)
unsigned sysguard_set:1;
#endif
#if 0
unsigned cacheable:1;
#endif
unsigned pipeline:1;
unsigned chunked:1;
unsigned header_only:1;
unsigned expect_trailers:1;
unsigned keepalive:1;
unsigned lingering_close:1;
unsigned discard_body:1;
unsigned reading_body:1;
unsigned internal:1;
unsigned error_page:1;
unsigned filter_finalize:1;
unsigned post_action:1;
unsigned request_complete:1;
unsigned request_output:1;
unsigned header_sent:1;
unsigned expect_tested:1;
unsigned root_tested:1;
unsigned done:1;
unsigned logged:1;
unsigned buffered:4;
unsigned main_filter_need_in_memory:1;
unsigned filter_need_in_memory:1;
unsigned filter_need_temporary:1;
unsigned preserve_body:1;
unsigned allow_ranges:1;
unsigned subrequest_ranges:1;
unsigned single_range:1;
unsigned disable_not_modified:1;
#if (NGX_STAT_STUB)
unsigned stat_reading:1;
unsigned stat_writing:1;
#endif
unsigned stat_processing:1;
unsigned background:1;
unsigned health_check:1;
/* used to parse HTTP headers */
ngx_uint_t state;
ngx_uint_t header_hash;
ngx_uint_t lowcase_index;
u_char lowcase_header[NGX_HTTP_LC_HEADER_LEN];
u_char *header_name_start;
u_char *header_name_end;
u_char *header_start;
u_char *header_end;
/*
* a memory that can be reused after parsing a request line
* via ngx_http_ephemeral_t
*/
u_char *uri_start;
u_char *uri_end;
u_char *uri_ext;
u_char *args_start;
u_char *request_start;
u_char *request_end;
u_char *method_end;
u_char *schema_start;
u_char *schema_end;
u_char *host_start;
u_char *host_end;
u_char *port_start;
u_char *port_end;
unsigned http_minor:16;
unsigned http_major:16;
#if (T_NGX_MULTI_UPSTREAM)
ngx_queue_t *multi_item;
ngx_queue_t *backend_r;
ngx_queue_t waiting_queue;
ngx_flag_t waiting;
#endif
};
typedef struct {
ngx_http_posted_request_t terminal_posted_request;
} ngx_http_ephemeral_t;
#define ngx_http_ephemeral(r) (void *) (&r->uri_start)
extern ngx_http_header_t ngx_http_headers_in[];
extern ngx_http_header_out_t ngx_http_headers_out[];
#define ngx_http_set_log_request(log, r) \
((ngx_http_log_ctx_t *) log->data)->current_request = r
#endif /* _NGX_HTTP_REQUEST_H_INCLUDED_ */