58
|
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
|
132
|
12 static ngx_int_t
|
|
13 ngx_http_postpone_filter_output_postponed_request(ngx_http_request_t *r);
|
58
|
14 static ngx_int_t ngx_http_postpone_filter_init(ngx_cycle_t *cycle);
|
|
15
|
|
16
|
|
17 static ngx_http_module_t ngx_http_postpone_filter_module_ctx = {
|
|
18 NULL, /* preconfiguration */
|
|
19 NULL, /* postconfiguration */
|
|
20
|
|
21 NULL, /* create main configuration */
|
|
22 NULL, /* init main configuration */
|
|
23
|
|
24 NULL, /* create server configuration */
|
|
25 NULL, /* merge server configuration */
|
|
26
|
|
27 NULL, /* create location configuration */
|
|
28 NULL /* merge location configuration */
|
|
29 };
|
|
30
|
|
31
|
|
32 ngx_module_t ngx_http_postpone_filter_module = {
|
|
33 NGX_MODULE_V1,
|
|
34 &ngx_http_postpone_filter_module_ctx, /* module context */
|
|
35 NULL, /* module directives */
|
|
36 NGX_HTTP_MODULE, /* module type */
|
90
|
37 NULL, /* init master */
|
58
|
38 ngx_http_postpone_filter_init, /* init module */
|
90
|
39 NULL, /* init process */
|
|
40 NULL, /* init thread */
|
|
41 NULL, /* exit thread */
|
|
42 NULL, /* exit process */
|
|
43 NULL, /* exit master */
|
|
44 NGX_MODULE_V1_PADDING
|
58
|
45 };
|
|
46
|
|
47
|
|
48 static ngx_http_output_body_filter_pt ngx_http_next_filter;
|
|
49
|
|
50
|
|
51 static ngx_int_t
|
|
52 ngx_http_postpone_filter(ngx_http_request_t *r, ngx_chain_t *in)
|
|
53 {
|
|
54 ngx_int_t rc;
|
|
55 ngx_chain_t *out;
|
|
56 ngx_http_postponed_request_t *pr, **ppr;
|
|
57
|
132
|
58 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
59 "http postpone filter \"%V?%V\" %p", &r->uri, &r->args, in);
|
76
|
60
|
58
|
61 if (r != r->connection->data || (r->postponed && in)) {
|
|
62
|
|
63 if (r->postponed) {
|
|
64 for (pr = r->postponed; pr->next; pr = pr->next) { /* void */ }
|
|
65
|
|
66 ppr = pr->request ? &pr->next : NULL;
|
|
67
|
|
68 } else {
|
|
69 ppr = &r->postponed;
|
|
70 #if (NGX_SUPPRESS_WARN)
|
|
71 pr = NULL;
|
|
72 #endif
|
|
73 }
|
|
74
|
|
75 if (ppr) {
|
|
76 pr = ngx_palloc(r->pool, sizeof(ngx_http_postponed_request_t));
|
|
77 if (pr == NULL) {
|
|
78 return NGX_ERROR;
|
|
79 }
|
|
80
|
|
81 *ppr = pr;
|
|
82
|
|
83 pr->request = NULL;
|
|
84 pr->out = NULL;
|
|
85 pr->next = NULL;
|
|
86 }
|
|
87
|
|
88 if (ngx_chain_add_copy(r->pool, &pr->out, in) == NGX_ERROR) {
|
|
89 return NGX_ERROR;
|
|
90 }
|
|
91
|
|
92 if (r != r->connection->data || r->postponed->request) {
|
|
93 return NGX_AGAIN;
|
|
94 }
|
|
95 }
|
|
96
|
|
97 if (r->postponed) {
|
|
98 out = r->postponed->out;
|
146
|
99 if (out) {
|
|
100 r->postponed = r->postponed->next;
|
|
101 }
|
58
|
102
|
|
103 } else {
|
|
104 out = in;
|
|
105 }
|
|
106
|
144
|
107 rc = NGX_OK;
|
|
108
|
146
|
109 if (out
|
|
110 || (r->connection->buffered
|
|
111 & (NGX_HTTP_LOWLEVEL_BUFFERED|NGX_LOWLEVEL_BUFFERED)))
|
|
112 {
|
144
|
113
|
|
114 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
115 "http postpone filter out \"%V?%V\"", &r->uri, &r->args);
|
58
|
116
|
144
|
117 if (!(out && out->next == NULL && ngx_buf_sync_only(out->buf))) {
|
|
118
|
|
119 rc = ngx_http_next_filter(r->main, out);
|
58
|
120
|
144
|
121 if (rc == NGX_ERROR) {
|
|
122 /* NGX_ERROR may be returned by any filter */
|
|
123 r->connection->error = 1;
|
|
124 }
|
|
125 }
|
132
|
126 }
|
|
127
|
|
128 if (r->postponed == NULL) {
|
|
129 return rc;
|
|
130 }
|
|
131
|
|
132 rc = ngx_http_postpone_filter_output_postponed_request(r);
|
|
133
|
|
134 if (rc == NGX_ERROR) {
|
|
135 /* NGX_ERROR may be returned by any filter */
|
|
136 r->connection->error = 1;
|
58
|
137 }
|
|
138
|
|
139 return rc;
|
|
140 }
|
|
141
|
|
142
|
|
143 static ngx_int_t
|
132
|
144 ngx_http_postpone_filter_output_postponed_request(ngx_http_request_t *r)
|
|
145 {
|
|
146 ngx_int_t rc;
|
144
|
147 ngx_chain_t *out;
|
132
|
148 ngx_http_postponed_request_t *pr;
|
|
149
|
|
150 for ( ;; ) {
|
|
151 pr = r->postponed;
|
|
152
|
|
153 if (pr == NULL) {
|
|
154 return NGX_OK;
|
|
155 }
|
|
156
|
|
157 if (pr->request) {
|
|
158
|
|
159 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
160 "http postpone filter handle \"%V?%V\"",
|
|
161 &pr->request->uri, &pr->request->args);
|
|
162
|
|
163 if (!pr->request->done) {
|
|
164 r->connection->data = pr->request;
|
|
165 return NGX_AGAIN;
|
|
166 }
|
|
167
|
|
168 rc = ngx_http_postpone_filter_output_postponed_request(pr->request);
|
|
169
|
|
170 if (rc == NGX_AGAIN || rc == NGX_ERROR) {
|
|
171 return rc;
|
|
172 }
|
|
173
|
|
174 r->postponed = r->postponed->next;
|
|
175 pr = r->postponed;
|
|
176 }
|
|
177
|
146
|
178 if (pr == NULL) {
|
|
179 return NGX_OK;
|
|
180 }
|
|
181
|
144
|
182 out = pr->out;
|
|
183
|
|
184 if (out) {
|
132
|
185 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
186 "http postpone filter out postponed \"%V?%V\"",
|
|
187 &r->uri, &r->args);
|
|
188
|
144
|
189 if (!(out && out->next == NULL && ngx_buf_sync_only(out->buf))) {
|
|
190 if (ngx_http_next_filter(r->main, out) == NGX_ERROR) {
|
|
191 return NGX_ERROR;
|
|
192 }
|
132
|
193 }
|
|
194 }
|
|
195
|
|
196 r->postponed = r->postponed->next;
|
|
197 }
|
|
198 }
|
|
199
|
|
200
|
|
201 static ngx_int_t
|
58
|
202 ngx_http_postpone_filter_init(ngx_cycle_t *cycle)
|
|
203 {
|
|
204 ngx_http_next_filter = ngx_http_top_body_filter;
|
|
205 ngx_http_top_body_filter = ngx_http_postpone_filter;
|
|
206
|
|
207 return NGX_OK;
|
|
208 }
|