1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9 #include <ngx_http.h>
10
11
12 typedef struct {
13 ngx_bufs_t bufs;
14 } ngx_http_copy_filter_conf_t;
15
16
17 static void *ngx_http_copy_filter_create_conf(ngx_conf_t *cf);
18 static char *ngx_http_copy_filter_merge_conf(ngx_conf_t *cf,
19 void *parent, void *child);
20 static ngx_int_t ngx_http_copy_filter_init(ngx_conf_t *cf);
21
22
23 static ngx_command_t ngx_http_copy_filter_commands[] = {
24
25 { ngx_string("output_buffers"),
26 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
27 ngx_conf_set_bufs_slot,
28 NGX_HTTP_LOC_CONF_OFFSET,
29 offsetof(ngx_http_copy_filter_conf_t, bufs),
30 NULL },
31
32 ngx_null_command
33 };
34
35
36 static ngx_http_module_t ngx_http_copy_filter_module_ctx = {
37 NULL, /* preconfiguration */
38 ngx_http_copy_filter_init, /* postconfiguration */
39
40 NULL, /* create main configuration */
41 NULL, /* init main configuration */
42
43 NULL, /* create server configuration */
44 NULL, /* merge server configuration */
45
46 ngx_http_copy_filter_create_conf, /* create location configuration */
47 ngx_http_copy_filter_merge_conf /* merge location configuration */
48 };
49
50
51 ngx_module_t ngx_http_copy_filter_module = {
52 NGX_MODULE_V1,
53 &ngx_http_copy_filter_module_ctx, /* module context */
54 ngx_http_copy_filter_commands, /* module directives */
55 NGX_HTTP_MODULE, /* module type */
56 NULL, /* init master */
57 NULL, /* init module */
58 NULL, /* init process */
59 NULL, /* init thread */
60 NULL, /* exit thread */
61 NULL, /* exit process */
62 NULL, /* exit master */
63 NGX_MODULE_V1_PADDING
64 };
65
66
67 static ngx_http_output_body_filter_pt ngx_http_next_filter;
68
69
70 static ngx_int_t
71 ngx_http_copy_filter(ngx_http_request_t *r, ngx_chain_t *in)
72 {
73 ngx_int_t rc;
74 ngx_connection_t *c;
75 ngx_output_chain_ctx_t *ctx;
76 ngx_http_copy_filter_conf_t *conf;
77
78 c = r->connection;
79
80 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
81 "copy filter: \"%V?%V\"", &r->uri, &r->args);
82
83 ctx = ngx_http_get_module_ctx(r, ngx_http_copy_filter_module);
84
85 if (ctx == NULL) {
86 conf = ngx_http_get_module_loc_conf(r, ngx_http_copy_filter_module);
87
88 ctx = ngx_pcalloc(r->pool, sizeof(ngx_output_chain_ctx_t));
89 if (ctx == NULL) {
90 return NGX_ERROR;
91 }
92
93 ngx_http_set_ctx(r, ctx, ngx_http_copy_filter_module);
94
95 ctx->sendfile = c->sendfile;
96 ctx->need_in_memory = r->main_filter_need_in_memory
97 || r->filter_need_in_memory;
98 ctx->need_in_temp = r->filter_need_temporary;
99
100 ctx->pool = r->pool;
101 ctx->bufs = conf->bufs;
102 ctx->tag = (ngx_buf_tag_t) &ngx_http_copy_filter_module;
103
104 ctx->output_filter = (ngx_output_chain_filter_pt) ngx_http_next_filter;
105 ctx->filter_ctx = r;
106
107 r->request_output = 1;
108 }
109
110 rc = ngx_output_chain(ctx, in);
111
112 if (!c->destroyed) {
113
114 if (ctx->in == NULL) {
115 r->buffered &= ~NGX_HTTP_COPY_BUFFERED;
116 } else {
117 r->buffered |= NGX_HTTP_COPY_BUFFERED;
118 }
119
120 if (r != r->main) {
121 r->out = ctx->in;
122 }
123
124 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
125 "copy filter: %i \"%V?%V\"", rc, &r->uri, &r->args);
126 }
127
128 return rc;
129 }
130
131
132 static void *
133 ngx_http_copy_filter_create_conf(ngx_conf_t *cf)
134 {
135 ngx_http_copy_filter_conf_t *conf;
136
137 conf = ngx_palloc(cf->pool, sizeof(ngx_http_copy_filter_conf_t));
138 if (conf == NULL) {
139 return NULL;
140 }
141
142 conf->bufs.num = 0;
143
144 return conf;
145 }
146
147
148 static char *
149 ngx_http_copy_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child)
150 {
151 ngx_http_copy_filter_conf_t *prev = parent;
152 ngx_http_copy_filter_conf_t *conf = child;
153
154 ngx_conf_merge_bufs_value(conf->bufs, prev->bufs, 1, 32768);
155
156 return NULL;
157 }
158
159
160 static ngx_int_t
161 ngx_http_copy_filter_init(ngx_conf_t *cf)
162 {
163 ngx_http_next_filter = ngx_http_top_body_filter;
164 ngx_http_top_body_filter = ngx_http_copy_filter;
165
166 return NGX_OK;
167 }
168
169
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