Mercurial > hg > nginx
comparison src/http/modules/ngx_http_mirror_module.c @ 7072:0bb747b2d7cb
Mirror module.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Thu, 20 Jul 2017 08:50:49 +0300 |
parents | |
children | 230d16d35ebc |
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7071:cce6936ed2f4 | 7072:0bb747b2d7cb |
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1 | |
2 /* | |
3 * Copyright (C) Roman Arutyunyan | |
4 * Copyright (C) Nginx, Inc. | |
5 */ | |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_http.h> | |
11 | |
12 | |
13 typedef struct { | |
14 ngx_array_t *mirror; | |
15 ngx_flag_t request_body; | |
16 } ngx_http_mirror_loc_conf_t; | |
17 | |
18 | |
19 typedef struct { | |
20 ngx_int_t status; | |
21 } ngx_http_mirror_ctx_t; | |
22 | |
23 | |
24 static ngx_int_t ngx_http_mirror_handler(ngx_http_request_t *r); | |
25 static void ngx_http_mirror_body_handler(ngx_http_request_t *r); | |
26 static ngx_int_t ngx_http_mirror_handler_internal(ngx_http_request_t *r); | |
27 static void *ngx_http_mirror_create_loc_conf(ngx_conf_t *cf); | |
28 static char *ngx_http_mirror_merge_loc_conf(ngx_conf_t *cf, void *parent, | |
29 void *child); | |
30 static ngx_int_t ngx_http_mirror_init(ngx_conf_t *cf); | |
31 | |
32 | |
33 static ngx_command_t ngx_http_mirror_commands[] = { | |
34 | |
35 { ngx_string("mirror"), | |
36 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
37 ngx_conf_set_str_array_slot, | |
38 NGX_HTTP_LOC_CONF_OFFSET, | |
39 offsetof(ngx_http_mirror_loc_conf_t, mirror), | |
40 NULL }, | |
41 | |
42 { ngx_string("mirror_request_body"), | |
43 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, | |
44 ngx_conf_set_flag_slot, | |
45 NGX_HTTP_LOC_CONF_OFFSET, | |
46 offsetof(ngx_http_mirror_loc_conf_t, request_body), | |
47 NULL }, | |
48 | |
49 ngx_null_command | |
50 }; | |
51 | |
52 | |
53 static ngx_http_module_t ngx_http_mirror_module_ctx = { | |
54 NULL, /* preconfiguration */ | |
55 ngx_http_mirror_init, /* postconfiguration */ | |
56 | |
57 NULL, /* create main configuration */ | |
58 NULL, /* init main configuration */ | |
59 | |
60 NULL, /* create server configuration */ | |
61 NULL, /* merge server configuration */ | |
62 | |
63 ngx_http_mirror_create_loc_conf, /* create location configuration */ | |
64 ngx_http_mirror_merge_loc_conf /* merge location configuration */ | |
65 }; | |
66 | |
67 | |
68 ngx_module_t ngx_http_mirror_module = { | |
69 NGX_MODULE_V1, | |
70 &ngx_http_mirror_module_ctx, /* module context */ | |
71 ngx_http_mirror_commands, /* module directives */ | |
72 NGX_HTTP_MODULE, /* module type */ | |
73 NULL, /* init master */ | |
74 NULL, /* init module */ | |
75 NULL, /* init process */ | |
76 NULL, /* init thread */ | |
77 NULL, /* exit thread */ | |
78 NULL, /* exit process */ | |
79 NULL, /* exit master */ | |
80 NGX_MODULE_V1_PADDING | |
81 }; | |
82 | |
83 | |
84 static ngx_int_t | |
85 ngx_http_mirror_handler(ngx_http_request_t *r) | |
86 { | |
87 ngx_int_t rc; | |
88 ngx_http_mirror_ctx_t *ctx; | |
89 ngx_http_mirror_loc_conf_t *mlcf; | |
90 | |
91 if (r != r->main) { | |
92 return NGX_DECLINED; | |
93 } | |
94 | |
95 mlcf = ngx_http_get_module_loc_conf(r, ngx_http_mirror_module); | |
96 | |
97 if (mlcf->mirror == NULL) { | |
98 return NGX_DECLINED; | |
99 } | |
100 | |
101 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "mirror handler"); | |
102 | |
103 if (mlcf->request_body) { | |
104 ctx = ngx_http_get_module_ctx(r, ngx_http_mirror_module); | |
105 | |
106 if (ctx) { | |
107 return ctx->status; | |
108 } | |
109 | |
110 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_mirror_ctx_t)); | |
111 if (ctx == NULL) { | |
112 return NGX_ERROR; | |
113 } | |
114 | |
115 ctx->status = NGX_DONE; | |
116 | |
117 ngx_http_set_ctx(r, ctx, ngx_http_mirror_module); | |
118 | |
119 rc = ngx_http_read_client_request_body(r, ngx_http_mirror_body_handler); | |
120 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { | |
121 return rc; | |
122 } | |
123 | |
124 ngx_http_finalize_request(r, NGX_DONE); | |
125 return NGX_DONE; | |
126 } | |
127 | |
128 return ngx_http_mirror_handler_internal(r); | |
129 } | |
130 | |
131 | |
132 static void | |
133 ngx_http_mirror_body_handler(ngx_http_request_t *r) | |
134 { | |
135 ngx_http_mirror_ctx_t *ctx; | |
136 | |
137 ctx = ngx_http_get_module_ctx(r, ngx_http_mirror_module); | |
138 | |
139 ctx->status = ngx_http_mirror_handler_internal(r); | |
140 | |
141 r->preserve_body = 1; | |
142 | |
143 r->write_event_handler = ngx_http_core_run_phases; | |
144 ngx_http_core_run_phases(r); | |
145 } | |
146 | |
147 | |
148 static ngx_int_t | |
149 ngx_http_mirror_handler_internal(ngx_http_request_t *r) | |
150 { | |
151 ngx_str_t *name; | |
152 ngx_uint_t i; | |
153 ngx_http_request_t *sr; | |
154 ngx_http_mirror_loc_conf_t *mlcf; | |
155 | |
156 mlcf = ngx_http_get_module_loc_conf(r, ngx_http_mirror_module); | |
157 | |
158 name = mlcf->mirror->elts; | |
159 | |
160 for (i = 0; i < mlcf->mirror->nelts; i++) { | |
161 if (ngx_http_subrequest(r, &name[i], &r->args, &sr, NULL, | |
162 NGX_HTTP_SUBREQUEST_BACKGROUND) | |
163 != NGX_OK) | |
164 { | |
165 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
166 } | |
167 | |
168 sr->header_only = 1; | |
169 sr->method = r->method; | |
170 sr->method_name = r->method_name; | |
171 } | |
172 | |
173 return NGX_DECLINED; | |
174 } | |
175 | |
176 | |
177 static void * | |
178 ngx_http_mirror_create_loc_conf(ngx_conf_t *cf) | |
179 { | |
180 ngx_http_mirror_loc_conf_t *mlcf; | |
181 | |
182 mlcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_mirror_loc_conf_t)); | |
183 if (mlcf == NULL) { | |
184 return NULL; | |
185 } | |
186 | |
187 mlcf->mirror = NGX_CONF_UNSET_PTR; | |
188 mlcf->request_body = NGX_CONF_UNSET; | |
189 | |
190 return mlcf; | |
191 } | |
192 | |
193 | |
194 static char * | |
195 ngx_http_mirror_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
196 { | |
197 ngx_http_mirror_loc_conf_t *prev = parent; | |
198 ngx_http_mirror_loc_conf_t *conf = child; | |
199 | |
200 ngx_conf_merge_ptr_value(conf->mirror, prev->mirror, NULL); | |
201 ngx_conf_merge_value(conf->request_body, prev->request_body, 1); | |
202 | |
203 return NGX_CONF_OK; | |
204 } | |
205 | |
206 | |
207 static ngx_int_t | |
208 ngx_http_mirror_init(ngx_conf_t *cf) | |
209 { | |
210 ngx_http_handler_pt *h; | |
211 ngx_http_core_main_conf_t *cmcf; | |
212 | |
213 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
214 | |
215 h = ngx_array_push(&cmcf->phases[NGX_HTTP_PRECONTENT_PHASE].handlers); | |
216 if (h == NULL) { | |
217 return NGX_ERROR; | |
218 } | |
219 | |
220 *h = ngx_http_mirror_handler; | |
221 | |
222 return NGX_OK; | |
223 } |