mirror of
https://github.com/nginx/nginx.git
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334 lines
11 KiB
C
334 lines
11 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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*/
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#ifndef _NGX_HTTP_UPSTREAM_H_INCLUDED_
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#define _NGX_HTTP_UPSTREAM_H_INCLUDED_
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_event.h>
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#include <ngx_event_connect.h>
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#include <ngx_event_pipe.h>
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#include <ngx_http.h>
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#define NGX_HTTP_UPSTREAM_FT_ERROR 0x00000002
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#define NGX_HTTP_UPSTREAM_FT_TIMEOUT 0x00000004
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#define NGX_HTTP_UPSTREAM_FT_INVALID_HEADER 0x00000008
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#define NGX_HTTP_UPSTREAM_FT_HTTP_500 0x00000010
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#define NGX_HTTP_UPSTREAM_FT_HTTP_502 0x00000020
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#define NGX_HTTP_UPSTREAM_FT_HTTP_503 0x00000040
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#define NGX_HTTP_UPSTREAM_FT_HTTP_504 0x00000080
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#define NGX_HTTP_UPSTREAM_FT_HTTP_404 0x00000100
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#define NGX_HTTP_UPSTREAM_FT_BUSY_LOCK 0x00000200
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#define NGX_HTTP_UPSTREAM_FT_MAX_WAITING 0x00000400
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#define NGX_HTTP_UPSTREAM_FT_NOLIVE 0x40000000
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#define NGX_HTTP_UPSTREAM_FT_OFF 0x80000000
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#define NGX_HTTP_UPSTREAM_FT_STATUS (NGX_HTTP_UPSTREAM_FT_HTTP_500 \
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|NGX_HTTP_UPSTREAM_FT_HTTP_502 \
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|NGX_HTTP_UPSTREAM_FT_HTTP_503 \
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|NGX_HTTP_UPSTREAM_FT_HTTP_504 \
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|NGX_HTTP_UPSTREAM_FT_HTTP_404)
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#define NGX_HTTP_UPSTREAM_INVALID_HEADER 40
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#define NGX_HTTP_UPSTREAM_IGN_XA_REDIRECT 0x00000002
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#define NGX_HTTP_UPSTREAM_IGN_XA_EXPIRES 0x00000004
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#define NGX_HTTP_UPSTREAM_IGN_EXPIRES 0x00000008
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#define NGX_HTTP_UPSTREAM_IGN_CACHE_CONTROL 0x00000010
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typedef struct {
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ngx_msec_t bl_time;
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ngx_uint_t bl_state;
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ngx_uint_t status;
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time_t response_sec;
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ngx_uint_t response_msec;
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off_t response_length;
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ngx_str_t *peer;
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} ngx_http_upstream_state_t;
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typedef struct {
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ngx_hash_t headers_in_hash;
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ngx_array_t upstreams;
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/* ngx_http_upstream_srv_conf_t */
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} ngx_http_upstream_main_conf_t;
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typedef struct ngx_http_upstream_srv_conf_s ngx_http_upstream_srv_conf_t;
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typedef ngx_int_t (*ngx_http_upstream_init_pt)(ngx_conf_t *cf,
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ngx_http_upstream_srv_conf_t *us);
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typedef ngx_int_t (*ngx_http_upstream_init_peer_pt)(ngx_http_request_t *r,
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ngx_http_upstream_srv_conf_t *us);
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typedef struct {
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ngx_http_upstream_init_pt init_upstream;
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ngx_http_upstream_init_peer_pt init;
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void *data;
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} ngx_http_upstream_peer_t;
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typedef struct {
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ngx_peer_addr_t *addrs;
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ngx_uint_t naddrs;
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ngx_uint_t weight;
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ngx_uint_t max_fails;
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time_t fail_timeout;
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unsigned down:1;
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unsigned backup:1;
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} ngx_http_upstream_server_t;
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#define NGX_HTTP_UPSTREAM_CREATE 0x0001
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#define NGX_HTTP_UPSTREAM_WEIGHT 0x0002
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#define NGX_HTTP_UPSTREAM_MAX_FAILS 0x0004
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#define NGX_HTTP_UPSTREAM_FAIL_TIMEOUT 0x0008
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#define NGX_HTTP_UPSTREAM_DOWN 0x0010
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#define NGX_HTTP_UPSTREAM_BACKUP 0x0020
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struct ngx_http_upstream_srv_conf_s {
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ngx_http_upstream_peer_t peer;
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void **srv_conf;
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ngx_array_t *servers; /* ngx_http_upstream_server_t */
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ngx_uint_t flags;
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ngx_str_t host;
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u_char *file_name;
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ngx_uint_t line;
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in_port_t port;
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in_port_t default_port;
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};
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typedef struct {
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ngx_http_upstream_srv_conf_t *upstream;
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ngx_msec_t connect_timeout;
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ngx_msec_t send_timeout;
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ngx_msec_t read_timeout;
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ngx_msec_t timeout;
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size_t send_lowat;
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size_t buffer_size;
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size_t busy_buffers_size;
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size_t max_temp_file_size;
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size_t temp_file_write_size;
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size_t busy_buffers_size_conf;
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size_t max_temp_file_size_conf;
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size_t temp_file_write_size_conf;
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ngx_bufs_t bufs;
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ngx_uint_t ignore_headers;
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ngx_uint_t next_upstream;
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ngx_uint_t store_access;
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ngx_flag_t buffering;
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ngx_flag_t pass_request_headers;
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ngx_flag_t pass_request_body;
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ngx_flag_t ignore_client_abort;
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ngx_flag_t intercept_errors;
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ngx_flag_t cyclic_temp_file;
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ngx_path_t *temp_path;
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ngx_hash_t hide_headers_hash;
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ngx_array_t *hide_headers;
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ngx_array_t *pass_headers;
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#if (NGX_HTTP_CACHE)
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ngx_shm_zone_t *cache;
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ngx_uint_t cache_min_uses;
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ngx_uint_t cache_use_stale;
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ngx_array_t *cache_valid;
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#endif
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ngx_array_t *store_lengths;
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ngx_array_t *store_values;
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signed store:2;
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unsigned intercept_404:1;
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unsigned change_buffering:1;
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#if (NGX_HTTP_SSL)
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ngx_ssl_t *ssl;
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ngx_flag_t ssl_session_reuse;
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#endif
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} ngx_http_upstream_conf_t;
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typedef struct {
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ngx_str_t name;
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ngx_http_header_handler_pt handler;
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ngx_uint_t offset;
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ngx_http_header_handler_pt copy_handler;
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ngx_uint_t conf;
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ngx_uint_t redirect; /* unsigned redirect:1; */
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} ngx_http_upstream_header_t;
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typedef struct {
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ngx_list_t headers;
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ngx_uint_t status_n;
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ngx_str_t status_line;
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ngx_table_elt_t *status;
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ngx_table_elt_t *date;
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ngx_table_elt_t *server;
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ngx_table_elt_t *connection;
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ngx_table_elt_t *expires;
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ngx_table_elt_t *etag;
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ngx_table_elt_t *x_accel_expires;
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ngx_table_elt_t *x_accel_redirect;
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ngx_table_elt_t *x_accel_limit_rate;
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ngx_table_elt_t *content_type;
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ngx_table_elt_t *content_length;
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ngx_table_elt_t *last_modified;
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ngx_table_elt_t *location;
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ngx_table_elt_t *accept_ranges;
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ngx_table_elt_t *www_authenticate;
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#if (NGX_HTTP_GZIP)
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ngx_table_elt_t *content_encoding;
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#endif
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off_t content_length_n;
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ngx_array_t cache_control;
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} ngx_http_upstream_headers_in_t;
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typedef struct {
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ngx_str_t host;
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in_port_t port;
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ngx_uint_t no_port; /* unsigned no_port:1 */
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ngx_uint_t naddrs;
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in_addr_t *addrs;
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struct sockaddr *sockaddr;
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socklen_t socklen;
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ngx_resolver_ctx_t *ctx;
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} ngx_http_upstream_resolved_t;
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typedef void (*ngx_http_upstream_handler_pt)(ngx_http_request_t *r,
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ngx_http_upstream_t *u);
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struct ngx_http_upstream_s {
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ngx_http_upstream_handler_pt read_event_handler;
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ngx_http_upstream_handler_pt write_event_handler;
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ngx_peer_connection_t peer;
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ngx_event_pipe_t *pipe;
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ngx_chain_t *request_bufs;
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ngx_output_chain_ctx_t output;
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ngx_chain_writer_ctx_t writer;
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ngx_http_upstream_conf_t *conf;
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ngx_http_upstream_headers_in_t headers_in;
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ngx_http_upstream_resolved_t *resolved;
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ngx_buf_t buffer;
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size_t length;
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ngx_chain_t *out_bufs;
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ngx_chain_t *busy_bufs;
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ngx_chain_t *free_bufs;
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ngx_int_t (*input_filter_init)(void *data);
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ngx_int_t (*input_filter)(void *data, ssize_t bytes);
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void *input_filter_ctx;
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#if (NGX_HTTP_CACHE)
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ngx_int_t (*create_key)(ngx_http_request_t *r);
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#endif
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ngx_int_t (*create_request)(ngx_http_request_t *r);
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ngx_int_t (*reinit_request)(ngx_http_request_t *r);
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ngx_int_t (*process_header)(ngx_http_request_t *r);
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void (*abort_request)(ngx_http_request_t *r);
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void (*finalize_request)(ngx_http_request_t *r,
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ngx_int_t rc);
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ngx_int_t (*rewrite_redirect)(ngx_http_request_t *r,
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ngx_table_elt_t *h, size_t prefix);
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ngx_msec_t timeout;
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ngx_http_upstream_state_t *state;
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ngx_str_t method;
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ngx_str_t schema;
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ngx_str_t uri;
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ngx_http_cleanup_pt *cleanup;
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unsigned store:1;
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unsigned cacheable:1;
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unsigned accel:1;
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unsigned ssl:1;
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#if (NGX_HTTP_CACHE)
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unsigned stale_cache:1;
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#endif
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unsigned buffering:1;
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unsigned request_sent:1;
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unsigned header_sent:1;
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};
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typedef struct {
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ngx_uint_t status;
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ngx_uint_t mask;
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} ngx_http_upstream_next_t;
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ngx_int_t ngx_http_upstream_header_variable(ngx_http_request_t *r,
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ngx_http_variable_value_t *v, uintptr_t data);
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void ngx_http_upstream_init(ngx_http_request_t *r);
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ngx_http_upstream_srv_conf_t *ngx_http_upstream_add(ngx_conf_t *cf,
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ngx_url_t *u, ngx_uint_t flags);
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ngx_int_t ngx_http_upstream_hide_headers_hash(ngx_conf_t *cf,
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ngx_http_upstream_conf_t *conf, ngx_http_upstream_conf_t *prev,
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ngx_str_t *default_hide_headers, ngx_hash_init_t *hash);
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#define ngx_http_conf_upstream_srv_conf(uscf, module) \
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uscf->srv_conf[module.ctx_index]
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extern ngx_module_t ngx_http_upstream_module;
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#endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */
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