/* * Copyright (C) Igor Sysoev */ #ifndef _NGX_HTTP_UPSTREAM_H_INCLUDED_ #define _NGX_HTTP_UPSTREAM_H_INCLUDED_ #include #include #include #include #include #include #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_404 0x00000100 #define NGX_HTTP_UPSTREAM_FT_UPDATING 0x00000200 #define NGX_HTTP_UPSTREAM_FT_BUSY_LOCK 0x00000400 #define NGX_HTTP_UPSTREAM_FT_MAX_WAITING 0x00000800 #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_404) #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 typedef struct { ngx_msec_t bl_time; ngx_uint_t bl_state; ngx_uint_t status; time_t response_sec; ngx_uint_t response_msec; off_t response_length; 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_peer_addr_t *addrs; ngx_uint_t naddrs; ngx_uint_t weight; ngx_uint_t max_fails; time_t fail_timeout; unsigned down:1; unsigned backup:1; } 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 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; in_port_t default_port; }; 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 timeout; size_t send_lowat; size_t buffer_size; 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_flag_t 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_path_t *temp_path; ngx_hash_t hide_headers_hash; ngx_array_t *hide_headers; ngx_array_t *pass_headers; #if (NGX_HTTP_CACHE) ngx_shm_zone_t *cache; ngx_uint_t cache_min_uses; ngx_uint_t cache_use_stale; ngx_uint_t cache_methods; ngx_array_t *cache_valid; #endif ngx_array_t *store_lengths; ngx_array_t *store_values; signed store:2; unsigned intercept_404:1; unsigned change_buffering:1; #if (NGX_HTTP_SSL) ngx_ssl_t *ssl; ngx_flag_t ssl_session_reuse; #endif } 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; #if (NGX_HTTP_GZIP) ngx_table_elt_t *content_encoding; #endif off_t content_length_n; ngx_array_t cache_control; } 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; in_addr_t *addrs; struct sockaddr *sockaddr; socklen_t socklen; 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_headers_in_t headers_in; ngx_http_upstream_resolved_t *resolved; ngx_buf_t buffer; size_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_msec_t timeout; ngx_http_upstream_state_t *state; ngx_str_t method; ngx_str_t schema; ngx_str_t uri; ngx_http_cleanup_pt *cleanup; unsigned store:1; unsigned cacheable:1; unsigned accel:1; unsigned ssl:1; #if (NGX_HTTP_CACHE) unsigned stale_cache:1; #endif unsigned buffering:1; unsigned request_sent:1; unsigned header_sent:1; }; typedef struct { ngx_uint_t status; ngx_uint_t mask; } ngx_http_upstream_next_t; ngx_int_t ngx_http_upstream_header_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); 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); 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[]; #endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */