Annotation of embedaddon/nginx/src/http/ngx_http_postpone_filter_module.c, revision 1.1.1.1
1.1 misho 1:
2: /*
3: * Copyright (C) Igor Sysoev
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: static ngx_int_t ngx_http_postpone_filter_add(ngx_http_request_t *r,
14: ngx_chain_t *in);
15: static ngx_int_t ngx_http_postpone_filter_init(ngx_conf_t *cf);
16:
17:
18: static ngx_http_module_t ngx_http_postpone_filter_module_ctx = {
19: NULL, /* preconfiguration */
20: ngx_http_postpone_filter_init, /* postconfiguration */
21:
22: NULL, /* create main configuration */
23: NULL, /* init main configuration */
24:
25: NULL, /* create server configuration */
26: NULL, /* merge server configuration */
27:
28: NULL, /* create location configuration */
29: NULL /* merge location configuration */
30: };
31:
32:
33: ngx_module_t ngx_http_postpone_filter_module = {
34: NGX_MODULE_V1,
35: &ngx_http_postpone_filter_module_ctx, /* module context */
36: NULL, /* module directives */
37: NGX_HTTP_MODULE, /* module type */
38: NULL, /* init master */
39: NULL, /* init module */
40: NULL, /* init process */
41: NULL, /* init thread */
42: NULL, /* exit thread */
43: NULL, /* exit process */
44: NULL, /* exit master */
45: NGX_MODULE_V1_PADDING
46: };
47:
48:
49: static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
50:
51:
52: static ngx_int_t
53: ngx_http_postpone_filter(ngx_http_request_t *r, ngx_chain_t *in)
54: {
55: ngx_connection_t *c;
56: ngx_http_postponed_request_t *pr;
57:
58: c = r->connection;
59:
60: ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0,
61: "http postpone filter \"%V?%V\" %p", &r->uri, &r->args, in);
62:
63: if (r != c->data) {
64:
65: if (in) {
66: ngx_http_postpone_filter_add(r, in);
67: return NGX_OK;
68: }
69:
70: #if 0
71: /* TODO: SSI may pass NULL */
72: ngx_log_error(NGX_LOG_ALERT, c->log, 0,
73: "http postpone filter NULL inactive request",
74: &r->uri, &r->args);
75: #endif
76:
77: return NGX_OK;
78: }
79:
80: if (r->postponed == NULL) {
81:
82: if (in || c->buffered) {
83: return ngx_http_next_body_filter(r->main, in);
84: }
85:
86: return NGX_OK;
87: }
88:
89: if (in) {
90: ngx_http_postpone_filter_add(r, in);
91: }
92:
93: do {
94: pr = r->postponed;
95:
96: if (pr->request) {
97:
98: ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
99: "http postpone filter wake \"%V?%V\"",
100: &pr->request->uri, &pr->request->args);
101:
102: r->postponed = pr->next;
103:
104: c->data = pr->request;
105:
106: return ngx_http_post_request(pr->request, NULL);
107: }
108:
109: if (pr->out == NULL) {
110: ngx_log_error(NGX_LOG_ALERT, c->log, 0,
111: "http postpone filter NULL output",
112: &r->uri, &r->args);
113:
114: } else {
115: ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
116: "http postpone filter output \"%V?%V\"",
117: &r->uri, &r->args);
118:
119: if (ngx_http_next_body_filter(r->main, pr->out) == NGX_ERROR) {
120: return NGX_ERROR;
121: }
122: }
123:
124: r->postponed = pr->next;
125:
126: } while (r->postponed);
127:
128: return NGX_OK;
129: }
130:
131:
132: static ngx_int_t
133: ngx_http_postpone_filter_add(ngx_http_request_t *r, ngx_chain_t *in)
134: {
135: ngx_http_postponed_request_t *pr, **ppr;
136:
137: if (r->postponed) {
138: for (pr = r->postponed; pr->next; pr = pr->next) { /* void */ }
139:
140: if (pr->request == NULL) {
141: goto found;
142: }
143:
144: ppr = &pr->next;
145:
146: } else {
147: ppr = &r->postponed;
148: }
149:
150: pr = ngx_palloc(r->pool, sizeof(ngx_http_postponed_request_t));
151: if (pr == NULL) {
152: return NGX_ERROR;
153: }
154:
155: *ppr = pr;
156:
157: pr->request = NULL;
158: pr->out = NULL;
159: pr->next = NULL;
160:
161: found:
162:
163: if (ngx_chain_add_copy(r->pool, &pr->out, in) == NGX_OK) {
164: return NGX_OK;
165: }
166:
167: return NGX_ERROR;
168: }
169:
170:
171: static ngx_int_t
172: ngx_http_postpone_filter_init(ngx_conf_t *cf)
173: {
174: ngx_http_next_body_filter = ngx_http_top_body_filter;
175: ngx_http_top_body_filter = ngx_http_postpone_filter;
176:
177: return NGX_OK;
178: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>