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924bd79e31
*) Feature: the gzip_types directive.
*) Feature: the tcp_nodelay directive.
*) Feature: the send_lowat directive is working not only on OSes that
support kqueue NOTE_LOWAT, but also on OSes that support SO_SNDLOWAT.
*) Feature: the setproctitle() emulation for Linux and Solaris.
*) Bugfix: the "Location" header rewrite bug fixed while the proxying.
*) Bugfix: the ngx_http_chunked_module module may get caught in an
endless loop.
*) Bugfix: the /dev/poll module bugs fixed.
*) Bugfix: the responses were corrupted when the temporary files were
used while the proxying.
*) Bugfix: the unescaped requests were passed to the backend.
*) Bugfix: while the build configuration on Linux 2.4 the
--with-poll_module parameter was required.
262 lines
7.7 KiB
C
262 lines
7.7 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_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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in_port_t port;
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unsigned default_port:1;
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} ngx_http_proxy_upstream_conf_t;
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typedef struct {
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size_t send_lowat;
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size_t header_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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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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time_t default_expires;
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ngx_int_t lm_factor;
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ngx_uint_t next_upstream;
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ngx_uint_t use_stale;
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ngx_bufs_t bufs;
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ngx_flag_t cyclic_temp_file;
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ngx_flag_t cache;
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ngx_flag_t preserve_host;
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ngx_flag_t set_x_real_ip;
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ngx_flag_t add_x_forwarded_for;
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ngx_flag_t pass_server;
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ngx_flag_t pass_x_accel_expires;
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ngx_flag_t ignore_expires;
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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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/*
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* "EXPR/10/5/- 200/EXP/60 4"
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* "MISS/-/-/B 503/-/- -"
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* "EXPR/10/20/SB HIT/-/- -"
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* "EXPR/10/15/NB HIT/-/- -"
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*/
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typedef struct {
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ngx_http_proxy_state_e cache_state;
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time_t expired;
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time_t bl_time;
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ngx_uint_t bl_state;
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ngx_uint_t status;
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ngx_http_proxy_reason_e reason;
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time_t time;
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time_t expires;
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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_list_t headers;
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#if 0
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ngx_table_t headers; /* it must be first field */
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#endif
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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 *etag;
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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 *location;
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ngx_table_elt_t *accept_ranges;
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ngx_table_elt_t *x_pad;
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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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ngx_uint_t 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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ngx_uint_t status;
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ngx_str_t status_line;
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ngx_uint_t 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_buf_t *header_in;
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ngx_http_busy_lock_ctx_t busy_lock;
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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 try_busy_lock:1;
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unsigned busy_locked: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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ngx_uint_t status;
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u_char *status_start;
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u_char *status_end;
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ngx_uint_t status_count;
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ngx_uint_t 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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/*
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* we declare "action" as "char *" because the actions are usually
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* the static strings and in the "u_char *" case we have to override
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* all the time their types
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*/
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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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typedef struct {
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ngx_uint_t connection;
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ngx_http_proxy_ctx_t *proxy;
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} ngx_http_proxy_log_ctx_t;
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#define NGX_HTTP_PROXY_PARSE_NO_HEADER 30
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#define NGX_HTTP_PROXY_FT_ERROR 0x02
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#define NGX_HTTP_PROXY_FT_TIMEOUT 0x04
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#define NGX_HTTP_PROXY_FT_INVALID_HEADER 0x08
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#define NGX_HTTP_PROXY_FT_HTTP_500 0x10
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#define NGX_HTTP_PROXY_FT_HTTP_404 0x20
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#define NGX_HTTP_PROXY_FT_BUSY_LOCK 0x40
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#define NGX_HTTP_PROXY_FT_MAX_WAITING 0x80
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int ngx_http_proxy_request_upstream(ngx_http_proxy_ctx_t *p);
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#if (NGX_HTTP_FILE_CACHE)
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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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void ngx_http_proxy_cache_busy_lock(ngx_http_proxy_ctx_t *p);
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#endif
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void ngx_http_proxy_check_broken_connection(ngx_event_t *ev);
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void ngx_http_proxy_busy_lock_handler(ngx_event_t *rev);
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void ngx_http_proxy_upstream_busy_lock(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_http_proxy_ctx_t *p);
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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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