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205 lines
6.2 KiB
C
205 lines
6.2 KiB
C
#ifndef _NGX_HTTP_PROXY_HANDLER_H_INCLUDED_
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#define _NGX_HTTP_PROXY_HANDLER_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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typedef enum {
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NGX_HTTP_PROXY_CACHE_PASS = 1,
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NGX_HTTP_PROXY_CACHE_BYPASS,
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NGX_HTTP_PROXY_CACHE_AUTH,
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NGX_HTTP_PROXY_CACHE_PGNC,
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NGX_HTTP_PROXY_CACHE_MISS,
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NGX_HTTP_PROXY_CACHE_EXPR,
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NGX_HTTP_PROXY_CACHE_AGED,
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NGX_HTTP_PROXY_CACHE_HIT
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} ngx_http_proxy_state_e;
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typedef enum {
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NGX_HTTP_PROXY_CACHE_BPS = 1,
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NGX_HTTP_PROXY_CACHE_XAE,
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NGX_HTTP_PROXY_CACHE_CTL,
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NGX_HTTP_PROXY_CACHE_EXP,
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NGX_HTTP_PROXY_CACHE_MVD,
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NGX_HTTP_PROXY_CACHE_LMF,
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NGX_HTTP_PROXY_CACHE_PDE
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} ngx_http_proxy_reason_e;
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typedef struct {
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ngx_str_t url;
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ngx_str_t host;
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ngx_str_t uri;
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ngx_str_t host_header;
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ngx_str_t port_text;
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ngx_str_t *location;
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int port;
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} ngx_http_proxy_upstream_conf_t;
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typedef struct {
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ssize_t request_buffer_size;
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ngx_msec_t connect_timeout;
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ngx_msec_t send_timeout;
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ssize_t header_buffer_size;
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ngx_msec_t read_timeout;
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ngx_bufs_t bufs;
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ssize_t busy_buffers_size;
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ssize_t max_temp_file_size;
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ssize_t temp_file_write_size;
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int cyclic_temp_file;
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int cache;
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int pass_server;
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int pass_x_accel_expires;
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int ignore_expires;
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int lm_factor;
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int default_expires;
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int next_upstream;
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int use_stale;
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ngx_path_t *cache_path;
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ngx_path_t *temp_path;
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ngx_http_busy_lock_t *busy_lock;
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ngx_http_proxy_upstream_conf_t *upstream;
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ngx_peers_t *peers;
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} ngx_http_proxy_loc_conf_t;
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typedef struct {
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ngx_http_proxy_state_e cache;
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ngx_http_proxy_reason_e reason;
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int status;
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ngx_str_t *peer;
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} ngx_http_proxy_state_t;
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typedef struct {
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ngx_table_t *headers; /* it must be first field */
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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 *expires;
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ngx_table_elt_t *cache_control;
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ngx_table_elt_t *x_accel_expires;
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ngx_table_elt_t *connection;
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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 *accept_ranges;
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off_t content_length_n;
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} ngx_http_proxy_headers_in_t;
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typedef struct {
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ngx_http_cache_ctx_t ctx;
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int status;
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ngx_str_t status_line;
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ngx_http_proxy_headers_in_t headers_in;
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} ngx_http_proxy_cache_t;
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typedef struct {
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ngx_peer_connection_t peer;
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int status;
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ngx_str_t status_line;
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int method;
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ngx_output_chain_ctx_t *output_chain_ctx;
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ngx_event_pipe_t *event_pipe;
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ngx_http_proxy_headers_in_t headers_in;
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} ngx_http_proxy_upstream_t;
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typedef struct ngx_http_proxy_ctx_s ngx_http_proxy_ctx_t;
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struct ngx_http_proxy_ctx_s {
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ngx_http_request_t *request;
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ngx_http_proxy_loc_conf_t *lcf;
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ngx_http_proxy_upstream_t *upstream;
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ngx_http_proxy_cache_t *cache;
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ngx_hunk_t *header_in;
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unsigned accel:1;
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unsigned cachable:1;
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unsigned stale:1;
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unsigned valid_header_in:1;
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unsigned request_sent:1;
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unsigned header_sent:1;
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/* used to parse an upstream HTTP header */
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int status;
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char *status_start;
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char *status_end;
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int status_count;
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int parse_state;
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ngx_http_proxy_state_t *state;
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ngx_array_t states; /* of ngx_http_proxy_state_t */
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char *action;
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ngx_http_log_ctx_t *saved_ctx;
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ngx_log_handler_pt saved_handler;
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};
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#define NGX_HTTP_PROXY_PARSE_NO_HEADER 20
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#define NGX_HTTP_PROXY_FT_ERROR 2
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#define NGX_HTTP_PROXY_FT_TIMEOUT 4
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#define NGX_HTTP_PROXY_FT_INVALID_HEADER 8
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#define NGX_HTTP_PROXY_FT_HTTP_500 16
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#define NGX_HTTP_PROXY_FT_HTTP_404 32
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#define NGX_HTTP_PROXY_FT_BUSY_LOCK 64
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#define NGX_HTTP_PROXY_FT_MAX_WAITING 128
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int ngx_http_proxy_request_upstream(ngx_http_proxy_ctx_t *p);
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int ngx_http_proxy_get_cached_response(ngx_http_proxy_ctx_t *p);
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int ngx_http_proxy_send_cached_response(ngx_http_proxy_ctx_t *p);
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int ngx_http_proxy_is_cachable(ngx_http_proxy_ctx_t *p);
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int ngx_http_proxy_update_cache(ngx_http_proxy_ctx_t *p);
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size_t ngx_http_proxy_log_error(void *data, char *buf, size_t len);
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void ngx_http_proxy_finalize_request(ngx_http_proxy_ctx_t *p, int rc);
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void ngx_http_proxy_close_connection(ngx_connection_t *c);
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int ngx_http_proxy_parse_status_line(ngx_http_proxy_ctx_t *p);
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int ngx_http_proxy_copy_header(ngx_http_proxy_ctx_t *p,
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ngx_http_proxy_headers_in_t *headers_in);
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extern ngx_module_t ngx_http_proxy_module;
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extern ngx_http_header_t ngx_http_proxy_headers_in[];
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#endif /* _NGX_HTTP_PROXY_HANDLER_H_INCLUDED_ */
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