|
178
|
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_str_t before_body;
|
|
|
14 ngx_str_t after_body;
|
|
|
15 } ngx_http_addition_conf_t;
|
|
|
16
|
|
|
17
|
|
|
18 typedef struct {
|
|
|
19 unsigned before_body_sent:1;
|
|
|
20 unsigned after_body_sent:1;
|
|
|
21 } ngx_http_addition_ctx_t;
|
|
|
22
|
|
|
23
|
|
|
24 static ngx_int_t ngx_http_addition_filter_init(ngx_cycle_t *cycle);
|
|
|
25 static void *ngx_http_addition_create_conf(ngx_conf_t *cf);
|
|
|
26 static char *ngx_http_addition_merge_conf(ngx_conf_t *cf, void *parent,
|
|
|
27 void *child);
|
|
|
28
|
|
|
29
|
|
|
30 static ngx_command_t ngx_http_addition_commands[] = {
|
|
|
31
|
|
|
32 { ngx_string("add_before_body"),
|
|
|
33 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
|
|
|
34 ngx_conf_set_str_slot,
|
|
|
35 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
36 offsetof(ngx_http_addition_conf_t, before_body),
|
|
|
37 NULL },
|
|
|
38
|
|
|
39 { ngx_string("add_after_body"),
|
|
|
40 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
|
|
|
41 ngx_conf_set_str_slot,
|
|
|
42 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
43 offsetof(ngx_http_addition_conf_t, after_body),
|
|
|
44 NULL },
|
|
|
45
|
|
|
46 ngx_null_command
|
|
|
47 };
|
|
|
48
|
|
|
49
|
|
|
50 static ngx_http_module_t ngx_http_addition_filter_module_ctx = {
|
|
|
51 NULL, /* preconfiguration */
|
|
|
52 NULL, /* postconfiguration */
|
|
|
53
|
|
|
54 NULL, /* create main configuration */
|
|
|
55 NULL, /* init main configuration */
|
|
|
56
|
|
|
57 NULL, /* create server configuration */
|
|
|
58 NULL, /* merge server configuration */
|
|
|
59
|
|
|
60 ngx_http_addition_create_conf, /* create location configuration */
|
|
|
61 ngx_http_addition_merge_conf /* merge location configuration */
|
|
|
62 };
|
|
|
63
|
|
|
64
|
|
|
65 ngx_module_t ngx_http_addition_filter_module = {
|
|
|
66 NGX_MODULE_V1,
|
|
|
67 &ngx_http_addition_filter_module_ctx, /* module context */
|
|
|
68 ngx_http_addition_commands, /* module directives */
|
|
|
69 NGX_HTTP_MODULE, /* module type */
|
|
|
70 NULL, /* init master */
|
|
|
71 ngx_http_addition_filter_init, /* init module */
|
|
|
72 NULL, /* init process */
|
|
|
73 NULL, /* init thread */
|
|
|
74 NULL, /* exit thread */
|
|
|
75 NULL, /* exit process */
|
|
|
76 NULL, /* exit master */
|
|
|
77 NGX_MODULE_V1_PADDING
|
|
|
78 };
|
|
|
79
|
|
|
80
|
|
|
81 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
|
|
|
82 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
|
|
|
83
|
|
|
84
|
|
|
85 static ngx_int_t
|
|
|
86 ngx_http_addition_header_filter(ngx_http_request_t *r)
|
|
|
87 {
|
|
|
88 ngx_http_addition_ctx_t *ctx;
|
|
|
89 ngx_http_addition_conf_t *conf;
|
|
|
90
|
|
|
91 if (r->headers_out.status != NGX_HTTP_OK || r != r->main) {
|
|
|
92 return ngx_http_next_header_filter(r);
|
|
|
93 }
|
|
|
94
|
|
|
95 if (ngx_strncasecmp(r->headers_out.content_type.data, "text/html",
|
|
|
96 sizeof("text/html") - 1)
|
|
|
97 != 0)
|
|
|
98 {
|
|
|
99 return ngx_http_next_header_filter(r);
|
|
|
100 }
|
|
|
101
|
|
|
102 conf = ngx_http_get_module_loc_conf(r, ngx_http_addition_filter_module);
|
|
|
103
|
|
|
104 if (conf->before_body.len == 0 && conf->after_body.len == 0) {
|
|
|
105 return ngx_http_next_header_filter(r);
|
|
|
106 }
|
|
|
107
|
|
|
108 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_addition_ctx_t));
|
|
|
109 if (ctx == NULL) {
|
|
|
110 return NGX_ERROR;
|
|
|
111 }
|
|
|
112
|
|
|
113 ngx_http_set_ctx(r, ctx, ngx_http_addition_filter_module);
|
|
|
114
|
|
|
115 ngx_http_clear_content_length(r);
|
|
|
116 ngx_http_clear_accept_ranges(r);
|
|
|
117
|
|
|
118 return ngx_http_next_header_filter(r);
|
|
|
119 }
|
|
|
120
|
|
|
121
|
|
|
122 static ngx_int_t
|
|
|
123 ngx_http_addition_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
|
|
|
124 {
|
|
|
125 ngx_int_t rc;
|
|
|
126 ngx_uint_t last;
|
|
|
127 ngx_chain_t *cl;
|
|
|
128 ngx_http_addition_ctx_t *ctx;
|
|
|
129 ngx_http_addition_conf_t *conf;
|
|
|
130
|
|
|
131 if (in == NULL || r->header_only) {
|
|
|
132 return ngx_http_next_body_filter(r, in);
|
|
|
133 }
|
|
|
134
|
|
|
135 ctx = ngx_http_get_module_ctx(r, ngx_http_addition_filter_module);
|
|
|
136
|
|
|
137 if (ctx == NULL) {
|
|
|
138 return ngx_http_next_body_filter(r, in);
|
|
|
139 }
|
|
|
140
|
|
|
141 conf = ngx_http_get_module_loc_conf(r, ngx_http_addition_filter_module);
|
|
|
142
|
|
|
143 if (!ctx->before_body_sent) {
|
|
|
144 ctx->before_body_sent = 1;
|
|
|
145
|
|
|
146 if (conf->before_body.len) {
|
|
|
147 if (ngx_http_subrequest(r, &conf->before_body, NULL, 0) != NGX_OK) {
|
|
|
148 return NGX_ERROR;
|
|
|
149 }
|
|
|
150 }
|
|
|
151 }
|
|
|
152
|
|
|
153 last = 0;
|
|
|
154
|
|
|
155 for (cl = in; cl; cl = cl->next) {
|
|
|
156 if (cl->buf->last_buf) {
|
|
|
157 cl->buf->last_buf = 0;
|
|
|
158 last = 1;
|
|
|
159 }
|
|
|
160 }
|
|
|
161
|
|
|
162 rc = ngx_http_next_body_filter(r, in);
|
|
|
163
|
|
|
164 if (rc == NGX_ERROR
|
|
|
165 || !last
|
|
|
166 || ctx->after_body_sent
|
|
|
167 || conf->after_body.len == 0)
|
|
|
168 {
|
|
|
169 return rc;
|
|
|
170 }
|
|
|
171
|
|
|
172 if (ngx_http_subrequest(r, &conf->after_body, NULL, 0) != NGX_OK) {
|
|
|
173 return NGX_ERROR;
|
|
|
174 }
|
|
|
175
|
|
|
176 ctx->after_body_sent = 1;
|
|
|
177
|
|
|
178 return ngx_http_send_special(r, NGX_HTTP_LAST);
|
|
|
179 }
|
|
|
180
|
|
|
181
|
|
|
182 static ngx_int_t
|
|
|
183 ngx_http_addition_filter_init(ngx_cycle_t *cycle)
|
|
|
184 {
|
|
|
185 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
186 ngx_http_top_header_filter = ngx_http_addition_header_filter;
|
|
|
187
|
|
|
188 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
189 ngx_http_top_body_filter = ngx_http_addition_body_filter;
|
|
|
190
|
|
|
191 return NGX_OK;
|
|
|
192 }
|
|
|
193
|
|
|
194
|
|
|
195 static void *
|
|
|
196 ngx_http_addition_create_conf(ngx_conf_t *cf)
|
|
|
197 {
|
|
|
198 ngx_http_addition_conf_t *conf;
|
|
|
199
|
|
|
200 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_addition_conf_t));
|
|
|
201 if (conf == NULL) {
|
|
|
202 return NGX_CONF_ERROR;
|
|
|
203 }
|
|
|
204
|
|
|
205 /*
|
|
|
206 * set by ngx_pcalloc():
|
|
|
207 *
|
|
|
208 * conf->before_body.len = 0;
|
|
|
209 * conf->before_body.date = NULL;
|
|
|
210 * conf->after_body.len = 0;
|
|
|
211 * conf->after_body.date = NULL;
|
|
|
212 */
|
|
|
213
|
|
|
214 return conf;
|
|
|
215 }
|
|
|
216
|
|
|
217
|
|
|
218 static char *
|
|
|
219 ngx_http_addition_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
220 {
|
|
|
221 ngx_http_addition_conf_t *prev = parent;
|
|
|
222 ngx_http_addition_conf_t *conf = child;
|
|
|
223
|
|
|
224 ngx_conf_merge_str_value(conf->before_body, prev->before_body, "");
|
|
|
225 ngx_conf_merge_str_value(conf->after_body, prev->after_body, "");
|
|
|
226
|
|
|
227 return NGX_CONF_OK;
|
|
|
228 }
|
