diff options
Diffstat (limited to 'app/nginx/src/http/ngx_http_upstream.h')
| -rw-r--r-- | app/nginx/src/http/ngx_http_upstream.h | 430 |
1 files changed, 430 insertions, 0 deletions
diff --git a/app/nginx/src/http/ngx_http_upstream.h b/app/nginx/src/http/ngx_http_upstream.h new file mode 100644 index 0000000..c552ac0 --- /dev/null +++ b/app/nginx/src/http/ngx_http_upstream.h @@ -0,0 +1,430 @@ + +/* + * Copyright (C) Igor Sysoev + * Copyright (C) Nginx, Inc. + */ + + +#ifndef _NGX_HTTP_UPSTREAM_H_INCLUDED_ +#define _NGX_HTTP_UPSTREAM_H_INCLUDED_ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_event.h> +#include <ngx_event_connect.h> +#include <ngx_event_pipe.h> +#include <ngx_http.h> + + +#define NGX_HTTP_UPSTREAM_FT_ERROR 0x00000002 +#define NGX_HTTP_UPSTREAM_FT_TIMEOUT 0x00000004 +#define NGX_HTTP_UPSTREAM_FT_INVALID_HEADER 0x00000008 +#define NGX_HTTP_UPSTREAM_FT_HTTP_500 0x00000010 +#define NGX_HTTP_UPSTREAM_FT_HTTP_502 0x00000020 +#define NGX_HTTP_UPSTREAM_FT_HTTP_503 0x00000040 +#define NGX_HTTP_UPSTREAM_FT_HTTP_504 0x00000080 +#define NGX_HTTP_UPSTREAM_FT_HTTP_403 0x00000100 +#define NGX_HTTP_UPSTREAM_FT_HTTP_404 0x00000200 +#define NGX_HTTP_UPSTREAM_FT_HTTP_429 0x00000400 +#define NGX_HTTP_UPSTREAM_FT_UPDATING 0x00000800 +#define NGX_HTTP_UPSTREAM_FT_BUSY_LOCK 0x00001000 +#define NGX_HTTP_UPSTREAM_FT_MAX_WAITING 0x00002000 +#define NGX_HTTP_UPSTREAM_FT_NON_IDEMPOTENT 0x00004000 +#define NGX_HTTP_UPSTREAM_FT_NOLIVE 0x40000000 +#define NGX_HTTP_UPSTREAM_FT_OFF 0x80000000 + +#define NGX_HTTP_UPSTREAM_FT_STATUS (NGX_HTTP_UPSTREAM_FT_HTTP_500 \ + |NGX_HTTP_UPSTREAM_FT_HTTP_502 \ + |NGX_HTTP_UPSTREAM_FT_HTTP_503 \ + |NGX_HTTP_UPSTREAM_FT_HTTP_504 \ + |NGX_HTTP_UPSTREAM_FT_HTTP_403 \ + |NGX_HTTP_UPSTREAM_FT_HTTP_404 \ + |NGX_HTTP_UPSTREAM_FT_HTTP_429) + +#define NGX_HTTP_UPSTREAM_INVALID_HEADER 40 + + +#define NGX_HTTP_UPSTREAM_IGN_XA_REDIRECT 0x00000002 +#define NGX_HTTP_UPSTREAM_IGN_XA_EXPIRES 0x00000004 +#define NGX_HTTP_UPSTREAM_IGN_EXPIRES 0x00000008 +#define NGX_HTTP_UPSTREAM_IGN_CACHE_CONTROL 0x00000010 +#define NGX_HTTP_UPSTREAM_IGN_SET_COOKIE 0x00000020 +#define NGX_HTTP_UPSTREAM_IGN_XA_LIMIT_RATE 0x00000040 +#define NGX_HTTP_UPSTREAM_IGN_XA_BUFFERING 0x00000080 +#define NGX_HTTP_UPSTREAM_IGN_XA_CHARSET 0x00000100 +#define NGX_HTTP_UPSTREAM_IGN_VARY 0x00000200 + + +typedef struct { + ngx_uint_t status; + ngx_msec_t response_time; + ngx_msec_t connect_time; + ngx_msec_t header_time; + off_t response_length; + off_t bytes_received; + + ngx_str_t *peer; +} ngx_http_upstream_state_t; + + +typedef struct { + ngx_hash_t headers_in_hash; + ngx_array_t upstreams; + /* ngx_http_upstream_srv_conf_t */ +} ngx_http_upstream_main_conf_t; + +typedef struct ngx_http_upstream_srv_conf_s ngx_http_upstream_srv_conf_t; + +typedef ngx_int_t (*ngx_http_upstream_init_pt)(ngx_conf_t *cf, + ngx_http_upstream_srv_conf_t *us); +typedef ngx_int_t (*ngx_http_upstream_init_peer_pt)(ngx_http_request_t *r, + ngx_http_upstream_srv_conf_t *us); + + +typedef struct { + ngx_http_upstream_init_pt init_upstream; + ngx_http_upstream_init_peer_pt init; + void *data; +} ngx_http_upstream_peer_t; + + +typedef struct { + ngx_str_t name; + ngx_addr_t *addrs; + ngx_uint_t naddrs; + ngx_uint_t weight; + ngx_uint_t max_conns; + ngx_uint_t max_fails; + time_t fail_timeout; + ngx_msec_t slow_start; + + unsigned down:1; + unsigned backup:1; + + NGX_COMPAT_BEGIN(6) + NGX_COMPAT_END +} ngx_http_upstream_server_t; + + +#define NGX_HTTP_UPSTREAM_CREATE 0x0001 +#define NGX_HTTP_UPSTREAM_WEIGHT 0x0002 +#define NGX_HTTP_UPSTREAM_MAX_FAILS 0x0004 +#define NGX_HTTP_UPSTREAM_FAIL_TIMEOUT 0x0008 +#define NGX_HTTP_UPSTREAM_DOWN 0x0010 +#define NGX_HTTP_UPSTREAM_BACKUP 0x0020 +#define NGX_HTTP_UPSTREAM_MAX_CONNS 0x0100 + + +struct ngx_http_upstream_srv_conf_s { + ngx_http_upstream_peer_t peer; + void **srv_conf; + + ngx_array_t *servers; /* ngx_http_upstream_server_t */ + + ngx_uint_t flags; + ngx_str_t host; + u_char *file_name; + ngx_uint_t line; + in_port_t port; + ngx_uint_t no_port; /* unsigned no_port:1 */ + +#if (NGX_HTTP_UPSTREAM_ZONE) + ngx_shm_zone_t *shm_zone; +#endif +}; + + +typedef struct { + ngx_addr_t *addr; + ngx_http_complex_value_t *value; +#if (NGX_HAVE_TRANSPARENT_PROXY) + ngx_uint_t transparent; /* unsigned transparent:1; */ +#endif +} ngx_http_upstream_local_t; + + +typedef struct { + ngx_http_upstream_srv_conf_t *upstream; + + ngx_msec_t connect_timeout; + ngx_msec_t send_timeout; + ngx_msec_t read_timeout; + ngx_msec_t next_upstream_timeout; + + size_t send_lowat; + size_t buffer_size; + size_t limit_rate; + + size_t busy_buffers_size; + size_t max_temp_file_size; + size_t temp_file_write_size; + + size_t busy_buffers_size_conf; + size_t max_temp_file_size_conf; + size_t temp_file_write_size_conf; + + ngx_bufs_t bufs; + + ngx_uint_t ignore_headers; + ngx_uint_t next_upstream; + ngx_uint_t store_access; + ngx_uint_t next_upstream_tries; + ngx_flag_t buffering; + ngx_flag_t request_buffering; + ngx_flag_t pass_request_headers; + ngx_flag_t pass_request_body; + + ngx_flag_t ignore_client_abort; + ngx_flag_t intercept_errors; + ngx_flag_t cyclic_temp_file; + ngx_flag_t force_ranges; + + ngx_path_t *temp_path; + + ngx_hash_t hide_headers_hash; + ngx_array_t *hide_headers; + ngx_array_t *pass_headers; + + ngx_http_upstream_local_t *local; + +#if (NGX_HTTP_CACHE) + ngx_shm_zone_t *cache_zone; + ngx_http_complex_value_t *cache_value; + + ngx_uint_t cache_min_uses; + ngx_uint_t cache_use_stale; + ngx_uint_t cache_methods; + + off_t cache_max_range_offset; + + ngx_flag_t cache_lock; + ngx_msec_t cache_lock_timeout; + ngx_msec_t cache_lock_age; + + ngx_flag_t cache_revalidate; + ngx_flag_t cache_convert_head; + ngx_flag_t cache_background_update; + + ngx_array_t *cache_valid; + ngx_array_t *cache_bypass; + ngx_array_t *cache_purge; + ngx_array_t *no_cache; +#endif + + ngx_array_t *store_lengths; + ngx_array_t *store_values; + +#if (NGX_HTTP_CACHE) + signed cache:2; +#endif + signed store:2; + unsigned intercept_404:1; + unsigned change_buffering:1; + +#if (NGX_HTTP_SSL || NGX_COMPAT) + ngx_ssl_t *ssl; + ngx_flag_t ssl_session_reuse; + + ngx_http_complex_value_t *ssl_name; + ngx_flag_t ssl_server_name; + ngx_flag_t ssl_verify; +#endif + + ngx_str_t module; + + NGX_COMPAT_BEGIN(2) + NGX_COMPAT_END +} ngx_http_upstream_conf_t; + + +typedef struct { + ngx_str_t name; + ngx_http_header_handler_pt handler; + ngx_uint_t offset; + ngx_http_header_handler_pt copy_handler; + ngx_uint_t conf; + ngx_uint_t redirect; /* unsigned redirect:1; */ +} ngx_http_upstream_header_t; + + +typedef struct { + ngx_list_t headers; + + ngx_uint_t status_n; + ngx_str_t status_line; + + ngx_table_elt_t *status; + ngx_table_elt_t *date; + ngx_table_elt_t *server; + ngx_table_elt_t *connection; + + ngx_table_elt_t *expires; + ngx_table_elt_t *etag; + ngx_table_elt_t *x_accel_expires; + ngx_table_elt_t *x_accel_redirect; + ngx_table_elt_t *x_accel_limit_rate; + + ngx_table_elt_t *content_type; + ngx_table_elt_t *content_length; + + ngx_table_elt_t *last_modified; + ngx_table_elt_t *location; + ngx_table_elt_t *accept_ranges; + ngx_table_elt_t *www_authenticate; + ngx_table_elt_t *transfer_encoding; + ngx_table_elt_t *vary; + +#if (NGX_HTTP_GZIP) + ngx_table_elt_t *content_encoding; +#endif + + ngx_array_t cache_control; + ngx_array_t cookies; + + off_t content_length_n; + time_t last_modified_time; + + unsigned connection_close:1; + unsigned chunked:1; +} ngx_http_upstream_headers_in_t; + + +typedef struct { + ngx_str_t host; + in_port_t port; + ngx_uint_t no_port; /* unsigned no_port:1 */ + + ngx_uint_t naddrs; + ngx_resolver_addr_t *addrs; + + struct sockaddr *sockaddr; + socklen_t socklen; + ngx_str_t name; + + ngx_resolver_ctx_t *ctx; +} ngx_http_upstream_resolved_t; + + +typedef void (*ngx_http_upstream_handler_pt)(ngx_http_request_t *r, + ngx_http_upstream_t *u); + + +struct ngx_http_upstream_s { + ngx_http_upstream_handler_pt read_event_handler; + ngx_http_upstream_handler_pt write_event_handler; + + ngx_peer_connection_t peer; + + ngx_event_pipe_t *pipe; + + ngx_chain_t *request_bufs; + + ngx_output_chain_ctx_t output; + ngx_chain_writer_ctx_t writer; + + ngx_http_upstream_conf_t *conf; + ngx_http_upstream_srv_conf_t *upstream; +#if (NGX_HTTP_CACHE) + ngx_array_t *caches; +#endif + + ngx_http_upstream_headers_in_t headers_in; + + ngx_http_upstream_resolved_t *resolved; + + ngx_buf_t from_client; + + ngx_buf_t buffer; + off_t length; + + ngx_chain_t *out_bufs; + ngx_chain_t *busy_bufs; + ngx_chain_t *free_bufs; + + ngx_int_t (*input_filter_init)(void *data); + ngx_int_t (*input_filter)(void *data, ssize_t bytes); + void *input_filter_ctx; + +#if (NGX_HTTP_CACHE) + ngx_int_t (*create_key)(ngx_http_request_t *r); +#endif + ngx_int_t (*create_request)(ngx_http_request_t *r); + ngx_int_t (*reinit_request)(ngx_http_request_t *r); + ngx_int_t (*process_header)(ngx_http_request_t *r); + void (*abort_request)(ngx_http_request_t *r); + void (*finalize_request)(ngx_http_request_t *r, + ngx_int_t rc); + ngx_int_t (*rewrite_redirect)(ngx_http_request_t *r, + ngx_table_elt_t *h, size_t prefix); + ngx_int_t (*rewrite_cookie)(ngx_http_request_t *r, + ngx_table_elt_t *h); + + ngx_msec_t timeout; + + ngx_http_upstream_state_t *state; + + ngx_str_t method; + ngx_str_t schema; + ngx_str_t uri; + +#if (NGX_HTTP_SSL || NGX_COMPAT) + ngx_str_t ssl_name; +#endif + + ngx_http_cleanup_pt *cleanup; + + unsigned store:1; + unsigned cacheable:1; + unsigned accel:1; + unsigned ssl:1; +#if (NGX_HTTP_CACHE) + unsigned cache_status:3; +#endif + + unsigned buffering:1; + unsigned keepalive:1; + unsigned upgrade:1; + + unsigned request_sent:1; + unsigned request_body_sent:1; + unsigned header_sent:1; +}; + + +typedef struct { + ngx_uint_t status; + ngx_uint_t mask; +} ngx_http_upstream_next_t; + + +typedef struct { + ngx_str_t key; + ngx_str_t value; + ngx_uint_t skip_empty; +} ngx_http_upstream_param_t; + + +ngx_int_t ngx_http_upstream_create(ngx_http_request_t *r); +void ngx_http_upstream_init(ngx_http_request_t *r); +ngx_http_upstream_srv_conf_t *ngx_http_upstream_add(ngx_conf_t *cf, + ngx_url_t *u, ngx_uint_t flags); +char *ngx_http_upstream_bind_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, + void *conf); +char *ngx_http_upstream_param_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, + void *conf); +ngx_int_t ngx_http_upstream_hide_headers_hash(ngx_conf_t *cf, + ngx_http_upstream_conf_t *conf, ngx_http_upstream_conf_t *prev, + ngx_str_t *default_hide_headers, ngx_hash_init_t *hash); + + +#define ngx_http_conf_upstream_srv_conf(uscf, module) \ + uscf->srv_conf[module.ctx_index] + + +extern ngx_module_t ngx_http_upstream_module; +extern ngx_conf_bitmask_t ngx_http_upstream_cache_method_mask[]; +extern ngx_conf_bitmask_t ngx_http_upstream_ignore_headers_masks[]; + + +#endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */ |