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comparison src/http/modules/proxy/ngx_http_proxy_handler.h @ 0:f0b350454894 NGINX_0_1_0

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nginx 0.1.0 *) The first public version.
author Igor Sysoev <http://sysoev.ru>
date Mon, 04 Oct 2004 00:00:00 +0400
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children cc9f381affaa
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1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #ifndef _NGX_HTTP_PROXY_HANDLER_H_INCLUDED_
8 #define _NGX_HTTP_PROXY_HANDLER_H_INCLUDED_
9
10
11 #include <ngx_config.h>
12 #include <ngx_core.h>
13 #include <ngx_event.h>
14 #include <ngx_event_connect.h>
15 #include <ngx_event_pipe.h>
16 #include <ngx_http.h>
17
18
19 typedef enum {
20 NGX_HTTP_PROXY_CACHE_PASS = 1,
21 NGX_HTTP_PROXY_CACHE_BYPASS,
22 NGX_HTTP_PROXY_CACHE_AUTH,
23 NGX_HTTP_PROXY_CACHE_PGNC,
24 NGX_HTTP_PROXY_CACHE_MISS,
25 NGX_HTTP_PROXY_CACHE_EXPR,
26 NGX_HTTP_PROXY_CACHE_AGED,
27 NGX_HTTP_PROXY_CACHE_HIT
28 } ngx_http_proxy_state_e;
29
30
31 typedef enum {
32 NGX_HTTP_PROXY_CACHE_BPS = 1,
33 NGX_HTTP_PROXY_CACHE_XAE,
34 NGX_HTTP_PROXY_CACHE_CTL,
35 NGX_HTTP_PROXY_CACHE_EXP,
36 NGX_HTTP_PROXY_CACHE_MVD,
37 NGX_HTTP_PROXY_CACHE_LMF,
38 NGX_HTTP_PROXY_CACHE_PDE
39 } ngx_http_proxy_reason_e;
40
41
42 typedef struct {
43 ngx_str_t url;
44 ngx_str_t host;
45 ngx_str_t uri;
46 ngx_str_t host_header;
47 ngx_str_t port_text;
48 ngx_str_t *location;
49
50 in_port_t port;
51
52 unsigned default_port:1;
53 } ngx_http_proxy_upstream_conf_t;
54
55
56 typedef struct {
57 size_t header_buffer_size;
58 size_t busy_buffers_size;
59 size_t max_temp_file_size;
60 size_t temp_file_write_size;
61
62 ngx_msec_t connect_timeout;
63 ngx_msec_t send_timeout;
64 ngx_msec_t read_timeout;
65 time_t default_expires;
66
67 ngx_int_t lm_factor;
68
69 ngx_uint_t next_upstream;
70 ngx_uint_t use_stale;
71
72 ngx_bufs_t bufs;
73
74 ngx_flag_t cyclic_temp_file;
75 ngx_flag_t cache;
76 ngx_flag_t preserve_host;
77 ngx_flag_t set_x_real_ip;
78 ngx_flag_t add_x_forwarded_for;
79 ngx_flag_t pass_server;
80 ngx_flag_t pass_x_accel_expires;
81 ngx_flag_t ignore_expires;
82
83 ngx_path_t *cache_path;
84 ngx_path_t *temp_path;
85
86 ngx_http_busy_lock_t *busy_lock;
87
88 ngx_http_proxy_upstream_conf_t *upstream;
89 ngx_peers_t *peers;
90 } ngx_http_proxy_loc_conf_t;
91
92
93 /*
94 * "EXPR/10/5/- 200/EXP/60 4"
95 * "MISS/-/-/B 503/-/- -"
96 * "EXPR/10/20/SB HIT/-/- -"
97 * "EXPR/10/15/NB HIT/-/- -"
98 */
99
100 typedef struct {
101 ngx_http_proxy_state_e cache_state;
102 time_t expired;
103 time_t bl_time;
104 ngx_uint_t bl_state;
105
106 ngx_uint_t status;
107 ngx_http_proxy_reason_e reason;
108 time_t time;
109 time_t expires;
110
111 ngx_str_t *peer;
112 } ngx_http_proxy_state_t;
113
114
115 typedef struct {
116 ngx_list_t headers;
117 #if 0
118 ngx_table_t headers; /* it must be first field */
119 #endif
120
121 ngx_table_elt_t *date;
122 ngx_table_elt_t *server;
123
124 ngx_table_elt_t *expires;
125 ngx_table_elt_t *cache_control;
126 ngx_table_elt_t *etag;
127 ngx_table_elt_t *x_accel_expires;
128
129 ngx_table_elt_t *connection;
130 ngx_table_elt_t *content_type;
131 ngx_table_elt_t *content_length;
132 ngx_table_elt_t *last_modified;
133 ngx_table_elt_t *location;
134 ngx_table_elt_t *accept_ranges;
135 ngx_table_elt_t *x_pad;
136
137 off_t content_length_n;
138 } ngx_http_proxy_headers_in_t;
139
140
141 typedef struct {
142 ngx_http_cache_ctx_t ctx;
143 ngx_uint_t status;
144 ngx_str_t status_line;
145
146 ngx_http_proxy_headers_in_t headers_in;
147 } ngx_http_proxy_cache_t;
148
149
150 typedef struct {
151 ngx_peer_connection_t peer;
152 ngx_uint_t status;
153 ngx_str_t status_line;
154 ngx_uint_t method;
155
156 ngx_output_chain_ctx_t *output_chain_ctx;
157 ngx_event_pipe_t *event_pipe;
158
159 ngx_http_proxy_headers_in_t headers_in;
160 } ngx_http_proxy_upstream_t;
161
162
163 typedef struct ngx_http_proxy_ctx_s ngx_http_proxy_ctx_t;
164
165 struct ngx_http_proxy_ctx_s {
166 ngx_http_request_t *request;
167 ngx_http_proxy_loc_conf_t *lcf;
168 ngx_http_proxy_upstream_t *upstream;
169 ngx_http_proxy_cache_t *cache;
170
171 ngx_buf_t *header_in;
172
173 ngx_http_busy_lock_ctx_t busy_lock;
174
175 unsigned accel:1;
176
177 unsigned cachable:1;
178 unsigned stale:1;
179 unsigned try_busy_lock:1;
180 unsigned busy_locked:1;
181 unsigned valid_header_in:1;
182
183 unsigned request_sent:1;
184 unsigned header_sent:1;
185
186
187 /* used to parse an upstream HTTP header */
188 ngx_uint_t status;
189 u_char *status_start;
190 u_char *status_end;
191 ngx_uint_t status_count;
192 ngx_uint_t parse_state;
193
194 ngx_http_proxy_state_t *state;
195 ngx_array_t states; /* of ngx_http_proxy_state_t */
196
197 /*
198 * we declare "action" as "char *" because the actions are usually
199 * the static strings and in the "u_char *" case we have to override
200 * all the time their types
201 */
202
203 char *action;
204 ngx_http_log_ctx_t *saved_ctx;
205 ngx_log_handler_pt saved_handler;
206 };
207
208
209 typedef struct {
210 ngx_uint_t connection;
211 ngx_http_proxy_ctx_t *proxy;
212 } ngx_http_proxy_log_ctx_t;
213
214
215 #define NGX_HTTP_PROXY_PARSE_NO_HEADER 30
216
217
218 #define NGX_HTTP_PROXY_FT_ERROR 0x02
219 #define NGX_HTTP_PROXY_FT_TIMEOUT 0x04
220 #define NGX_HTTP_PROXY_FT_INVALID_HEADER 0x08
221 #define NGX_HTTP_PROXY_FT_HTTP_500 0x10
222 #define NGX_HTTP_PROXY_FT_HTTP_404 0x20
223 #define NGX_HTTP_PROXY_FT_BUSY_LOCK 0x40
224 #define NGX_HTTP_PROXY_FT_MAX_WAITING 0x80
225
226
227 int ngx_http_proxy_request_upstream(ngx_http_proxy_ctx_t *p);
228
229 #if (NGX_HTTP_FILE_CACHE)
230
231 int ngx_http_proxy_get_cached_response(ngx_http_proxy_ctx_t *p);
232 int ngx_http_proxy_send_cached_response(ngx_http_proxy_ctx_t *p);
233 int ngx_http_proxy_is_cachable(ngx_http_proxy_ctx_t *p);
234 int ngx_http_proxy_update_cache(ngx_http_proxy_ctx_t *p);
235
236 void ngx_http_proxy_cache_busy_lock(ngx_http_proxy_ctx_t *p);
237
238 #endif
239
240 void ngx_http_proxy_check_broken_connection(ngx_event_t *ev);
241
242 void ngx_http_proxy_busy_lock_handler(ngx_event_t *rev);
243 void ngx_http_proxy_upstream_busy_lock(ngx_http_proxy_ctx_t *p);
244
245 size_t ngx_http_proxy_log_error(void *data, char *buf, size_t len);
246 void ngx_http_proxy_finalize_request(ngx_http_proxy_ctx_t *p, int rc);
247 void ngx_http_proxy_close_connection(ngx_http_proxy_ctx_t *p);
248
249 int ngx_http_proxy_parse_status_line(ngx_http_proxy_ctx_t *p);
250 int ngx_http_proxy_copy_header(ngx_http_proxy_ctx_t *p,
251 ngx_http_proxy_headers_in_t *headers_in);
252
253
254
255 extern ngx_module_t ngx_http_proxy_module;
256 extern ngx_http_header_t ngx_http_proxy_headers_in[];
257
258
259
260 #endif /* _NGX_HTTP_PROXY_HANDLER_H_INCLUDED_ */