/* * Copyright (C) 2002-2004 Igor Sysoev */ #ifndef _NGX_HTTP_PROXY_HANDLER_H_INCLUDED_ #define _NGX_HTTP_PROXY_HANDLER_H_INCLUDED_ #include #include #include #include #include #include typedef enum { NGX_HTTP_PROXY_CACHE_PASS = 1, NGX_HTTP_PROXY_CACHE_BYPASS, NGX_HTTP_PROXY_CACHE_AUTH, NGX_HTTP_PROXY_CACHE_PGNC, NGX_HTTP_PROXY_CACHE_MISS, NGX_HTTP_PROXY_CACHE_EXPR, NGX_HTTP_PROXY_CACHE_AGED, NGX_HTTP_PROXY_CACHE_HIT } ngx_http_proxy_state_e; typedef enum { NGX_HTTP_PROXY_CACHE_BPS = 1, NGX_HTTP_PROXY_CACHE_XAE, NGX_HTTP_PROXY_CACHE_CTL, NGX_HTTP_PROXY_CACHE_EXP, NGX_HTTP_PROXY_CACHE_MVD, NGX_HTTP_PROXY_CACHE_LMF, NGX_HTTP_PROXY_CACHE_PDE } ngx_http_proxy_reason_e; typedef struct { ngx_str_t url; ngx_str_t host; ngx_str_t uri; ngx_str_t host_header; ngx_str_t port_text; ngx_str_t *location; in_port_t port; unsigned default_port:1; } ngx_http_proxy_upstream_conf_t; typedef struct { size_t header_buffer_size; size_t busy_buffers_size; size_t max_temp_file_size; size_t temp_file_write_size; ngx_msec_t connect_timeout; ngx_msec_t send_timeout; ngx_msec_t read_timeout; time_t default_expires; ngx_int_t lm_factor; ngx_uint_t next_upstream; ngx_uint_t use_stale; ngx_bufs_t bufs; ngx_flag_t cyclic_temp_file; ngx_flag_t cache; ngx_flag_t preserve_host; ngx_flag_t set_x_real_ip; ngx_flag_t add_x_forwarded_for; ngx_flag_t pass_server; ngx_flag_t pass_x_accel_expires; ngx_flag_t ignore_expires; ngx_path_t *cache_path; ngx_path_t *temp_path; ngx_http_busy_lock_t *busy_lock; ngx_http_proxy_upstream_conf_t *upstream; ngx_peers_t *peers; } ngx_http_proxy_loc_conf_t; /* * "EXPR/10/5/- 200/EXP/60 4" * "MISS/-/-/B 503/-/- -" * "EXPR/10/20/SB HIT/-/- -" * "EXPR/10/15/NB HIT/-/- -" */ typedef struct { ngx_http_proxy_state_e cache_state; time_t expired; time_t bl_time; ngx_uint_t bl_state; ngx_uint_t status; ngx_http_proxy_reason_e reason; time_t time; time_t expires; ngx_str_t *peer; } ngx_http_proxy_state_t; typedef struct { ngx_list_t headers; #if 0 ngx_table_t headers; /* it must be first field */ #endif ngx_table_elt_t *date; ngx_table_elt_t *server; ngx_table_elt_t *expires; ngx_table_elt_t *cache_control; ngx_table_elt_t *etag; ngx_table_elt_t *x_accel_expires; ngx_table_elt_t *connection; 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 *x_pad; off_t content_length_n; } ngx_http_proxy_headers_in_t; typedef struct { ngx_http_cache_ctx_t ctx; ngx_uint_t status; ngx_str_t status_line; ngx_http_proxy_headers_in_t headers_in; } ngx_http_proxy_cache_t; typedef struct { ngx_peer_connection_t peer; ngx_uint_t status; ngx_str_t status_line; ngx_uint_t method; ngx_output_chain_ctx_t *output_chain_ctx; ngx_event_pipe_t *event_pipe; ngx_http_proxy_headers_in_t headers_in; } ngx_http_proxy_upstream_t; typedef struct ngx_http_proxy_ctx_s ngx_http_proxy_ctx_t; struct ngx_http_proxy_ctx_s { ngx_http_request_t *request; ngx_http_proxy_loc_conf_t *lcf; ngx_http_proxy_upstream_t *upstream; ngx_http_proxy_cache_t *cache; ngx_buf_t *header_in; ngx_http_busy_lock_ctx_t busy_lock; unsigned accel:1; unsigned cachable:1; unsigned stale:1; unsigned try_busy_lock:1; unsigned busy_locked:1; unsigned valid_header_in:1; unsigned request_sent:1; unsigned header_sent:1; /* used to parse an upstream HTTP header */ ngx_uint_t status; u_char *status_start; u_char *status_end; ngx_uint_t status_count; ngx_uint_t parse_state; ngx_http_proxy_state_t *state; ngx_array_t states; /* of ngx_http_proxy_state_t */ /* * we declare "action" as "char *" because the actions are usually * the static strings and in the "u_char *" case we have to override * all the time their types */ char *action; ngx_http_log_ctx_t *saved_ctx; ngx_log_handler_pt saved_handler; }; typedef struct { ngx_uint_t connection; ngx_http_proxy_ctx_t *proxy; } ngx_http_proxy_log_ctx_t; #define NGX_HTTP_PROXY_PARSE_NO_HEADER 30 #define NGX_HTTP_PROXY_FT_ERROR 0x02 #define NGX_HTTP_PROXY_FT_TIMEOUT 0x04 #define NGX_HTTP_PROXY_FT_INVALID_HEADER 0x08 #define NGX_HTTP_PROXY_FT_HTTP_500 0x10 #define NGX_HTTP_PROXY_FT_HTTP_404 0x20 #define NGX_HTTP_PROXY_FT_BUSY_LOCK 0x40 #define NGX_HTTP_PROXY_FT_MAX_WAITING 0x80 int ngx_http_proxy_request_upstream(ngx_http_proxy_ctx_t *p); #if (NGX_HTTP_FILE_CACHE) int ngx_http_proxy_get_cached_response(ngx_http_proxy_ctx_t *p); int ngx_http_proxy_send_cached_response(ngx_http_proxy_ctx_t *p); int ngx_http_proxy_is_cachable(ngx_http_proxy_ctx_t *p); int ngx_http_proxy_update_cache(ngx_http_proxy_ctx_t *p); void ngx_http_proxy_cache_busy_lock(ngx_http_proxy_ctx_t *p); #endif void ngx_http_proxy_check_broken_connection(ngx_event_t *ev); void ngx_http_proxy_busy_lock_handler(ngx_event_t *rev); void ngx_http_proxy_upstream_busy_lock(ngx_http_proxy_ctx_t *p); size_t ngx_http_proxy_log_error(void *data, char *buf, size_t len); void ngx_http_proxy_finalize_request(ngx_http_proxy_ctx_t *p, int rc); void ngx_http_proxy_close_connection(ngx_http_proxy_ctx_t *p); int ngx_http_proxy_parse_status_line(ngx_http_proxy_ctx_t *p); int ngx_http_proxy_copy_header(ngx_http_proxy_ctx_t *p, ngx_http_proxy_headers_in_t *headers_in); extern ngx_module_t ngx_http_proxy_module; extern ngx_http_header_t ngx_http_proxy_headers_in[]; #endif /* _NGX_HTTP_PROXY_HANDLER_H_INCLUDED_ */