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comparison src/http/ngx_http_spdy_module.c @ 5121:c0f7b94e88ba

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Preliminary experimental support for SPDY draft 2.
author Valentin Bartenev <vbart@nginx.com>
date Wed, 20 Mar 2013 10:36:57 +0000
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children e5fb14e85040
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5120:7956af6b6a02 5121:c0f7b94e88ba
1
2 /*
3 * Copyright (C) Nginx, Inc.
4 * Copyright (C) Valentin V. Bartenev
5 */
6
7
8 #include <ngx_config.h>
9 #include <ngx_core.h>
10 #include <ngx_http.h>
11 #include <ngx_http_spdy_module.h>
12
13
14 static ngx_int_t ngx_http_spdy_add_variables(ngx_conf_t *cf);
15
16 static ngx_int_t ngx_http_spdy_variable(ngx_http_request_t *r,
17 ngx_http_variable_value_t *v, uintptr_t data);
18 static ngx_int_t ngx_http_spdy_request_priority_variable(ngx_http_request_t *r,
19 ngx_http_variable_value_t *v, uintptr_t data);
20
21 static ngx_int_t ngx_http_spdy_module_init(ngx_cycle_t *cycle);
22
23 static void *ngx_http_spdy_create_main_conf(ngx_conf_t *cf);
24 static char *ngx_http_spdy_init_main_conf(ngx_conf_t *cf, void *conf);
25
26 static void *ngx_http_spdy_create_srv_conf(ngx_conf_t *cf);
27 static char *ngx_http_spdy_merge_srv_conf(ngx_conf_t *cf, void *parent,
28 void *child);
29
30 static char *ngx_http_spdy_recv_buffer_size(ngx_conf_t *cf, void *post,
31 void *data);
32 static char *ngx_http_spdy_pool_size(ngx_conf_t *cf, void *post, void *data);
33 static char *ngx_http_spdy_streams_index_mask(ngx_conf_t *cf, void *post,
34 void *data);
35
36
37 static ngx_conf_num_bounds_t ngx_http_spdy_headers_comp_bounds = {
38 ngx_conf_check_num_bounds, 0, 9
39 };
40
41 static ngx_conf_post_t ngx_http_spdy_recv_buffer_size_post =
42 { ngx_http_spdy_recv_buffer_size };
43 static ngx_conf_post_t ngx_http_spdy_pool_size_post =
44 { ngx_http_spdy_pool_size };
45 static ngx_conf_post_t ngx_http_spdy_streams_index_mask_post =
46 { ngx_http_spdy_streams_index_mask };
47
48
49 static ngx_command_t ngx_http_spdy_commands[] = {
50
51 { ngx_string("spdy_recv_buffer_size"),
52 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
53 ngx_conf_set_size_slot,
54 NGX_HTTP_MAIN_CONF_OFFSET,
55 offsetof(ngx_http_spdy_main_conf_t, recv_buffer_size),
56 &ngx_http_spdy_recv_buffer_size_post },
57
58 { ngx_string("spdy_pool_size"),
59 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
60 ngx_conf_set_size_slot,
61 NGX_HTTP_SRV_CONF_OFFSET,
62 offsetof(ngx_http_spdy_srv_conf_t, pool_size),
63 &ngx_http_spdy_pool_size_post },
64
65 { ngx_string("spdy_max_concurrent_streams"),
66 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
67 ngx_conf_set_num_slot,
68 NGX_HTTP_SRV_CONF_OFFSET,
69 offsetof(ngx_http_spdy_srv_conf_t, concurrent_streams),
70 NULL },
71
72 { ngx_string("spdy_streams_index_size"),
73 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
74 ngx_conf_set_num_slot,
75 NGX_HTTP_SRV_CONF_OFFSET,
76 offsetof(ngx_http_spdy_srv_conf_t, streams_index_mask),
77 &ngx_http_spdy_streams_index_mask_post },
78
79 { ngx_string("spdy_recv_timeout"),
80 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
81 ngx_conf_set_msec_slot,
82 NGX_HTTP_SRV_CONF_OFFSET,
83 offsetof(ngx_http_spdy_srv_conf_t, recv_timeout),
84 NULL },
85
86 { ngx_string("spdy_keepalive_timeout"),
87 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
88 ngx_conf_set_msec_slot,
89 NGX_HTTP_SRV_CONF_OFFSET,
90 offsetof(ngx_http_spdy_srv_conf_t, keepalive_timeout),
91 NULL },
92
93 { ngx_string("spdy_headers_comp"),
94 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
95 ngx_conf_set_num_slot,
96 NGX_HTTP_SRV_CONF_OFFSET,
97 offsetof(ngx_http_spdy_srv_conf_t, headers_comp),
98 &ngx_http_spdy_headers_comp_bounds },
99
100 ngx_null_command
101 };
102
103
104 static ngx_http_module_t ngx_http_spdy_module_ctx = {
105 ngx_http_spdy_add_variables, /* preconfiguration */
106 NULL, /* postconfiguration */
107
108 ngx_http_spdy_create_main_conf, /* create main configuration */
109 ngx_http_spdy_init_main_conf, /* init main configuration */
110
111 ngx_http_spdy_create_srv_conf, /* create server configuration */
112 ngx_http_spdy_merge_srv_conf, /* merge server configuration */
113
114 NULL, /* create location configuration */
115 NULL /* merge location configuration */
116 };
117
118
119 ngx_module_t ngx_http_spdy_module = {
120 NGX_MODULE_V1,
121 &ngx_http_spdy_module_ctx, /* module context */
122 ngx_http_spdy_commands, /* module directives */
123 NGX_HTTP_MODULE, /* module type */
124 NULL, /* init master */
125 ngx_http_spdy_module_init, /* init module */
126 NULL, /* init process */
127 NULL, /* init thread */
128 NULL, /* exit thread */
129 NULL, /* exit process */
130 NULL, /* exit master */
131 NGX_MODULE_V1_PADDING
132 };
133
134
135 static ngx_http_variable_t ngx_http_spdy_vars[] = {
136
137 { ngx_string("spdy"), NULL,
138 ngx_http_spdy_variable, 0, 0, 0 },
139
140 { ngx_string("spdy_request_priority"), NULL,
141 ngx_http_spdy_request_priority_variable, 0, 0, 0 },
142
143 { ngx_null_string, NULL, NULL, 0, 0, 0 }
144 };
145
146
147 static ngx_int_t
148 ngx_http_spdy_add_variables(ngx_conf_t *cf)
149 {
150 ngx_http_variable_t *var, *v;
151
152 for (v = ngx_http_spdy_vars; v->name.len; v++) {
153 var = ngx_http_add_variable(cf, &v->name, v->flags);
154 if (var == NULL) {
155 return NGX_ERROR;
156 }
157
158 var->get_handler = v->get_handler;
159 var->data = v->data;
160 }
161
162 return NGX_OK;
163 }
164
165
166 static ngx_int_t
167 ngx_http_spdy_variable(ngx_http_request_t *r,
168 ngx_http_variable_value_t *v, uintptr_t data)
169 {
170 if (r->spdy_stream) {
171 v->len = 1;
172 v->valid = 1;
173 v->no_cacheable = 0;
174 v->not_found = 0;
175 v->data = (u_char *) "2";
176
177 return NGX_OK;
178 }
179
180 *v = ngx_http_variable_null_value;
181
182 return NGX_OK;
183 }
184
185
186 static ngx_int_t
187 ngx_http_spdy_request_priority_variable(ngx_http_request_t *r,
188 ngx_http_variable_value_t *v, uintptr_t data)
189 {
190 if (r->spdy_stream) {
191 v->len = 1;
192 v->valid = 1;
193 v->no_cacheable = 0;
194 v->not_found = 0;
195
196 v->data = ngx_pnalloc(r->pool, 1);
197 if (v->data == NULL) {
198 return NGX_ERROR;
199 }
200
201 v->data[0] = '0' + (u_char) r->spdy_stream->priority;
202
203 return NGX_OK;
204 }
205
206 *v = ngx_http_variable_null_value;
207
208 return NGX_OK;
209 }
210
211
212 static ngx_int_t
213 ngx_http_spdy_module_init(ngx_cycle_t *cycle)
214 {
215 ngx_http_spdy_request_headers_init();
216
217 return NGX_OK;
218 }
219
220
221 static void *
222 ngx_http_spdy_create_main_conf(ngx_conf_t *cf)
223 {
224 ngx_http_spdy_main_conf_t *smcf;
225
226 smcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_spdy_main_conf_t));
227 if (smcf == NULL) {
228 return NULL;
229 }
230
231 smcf->recv_buffer_size = NGX_CONF_UNSET_SIZE;
232
233 return smcf;
234 }
235
236
237 static char *
238 ngx_http_spdy_init_main_conf(ngx_conf_t *cf, void *conf)
239 {
240 ngx_http_spdy_main_conf_t *smcf = conf;
241
242 if (smcf->recv_buffer_size == NGX_CONF_UNSET_SIZE) {
243 smcf->recv_buffer_size = 256 * 1024;
244 }
245
246 return NGX_CONF_OK;
247 }
248
249
250 static void *
251 ngx_http_spdy_create_srv_conf(ngx_conf_t *cf)
252 {
253 ngx_http_spdy_srv_conf_t *sscf;
254
255 sscf = ngx_pcalloc(cf->pool, sizeof(ngx_http_spdy_srv_conf_t));
256 if (sscf == NULL) {
257 return NULL;
258 }
259
260 sscf->pool_size = NGX_CONF_UNSET_SIZE;
261
262 sscf->concurrent_streams = NGX_CONF_UNSET_UINT;
263 sscf->streams_index_mask = NGX_CONF_UNSET_UINT;
264
265 sscf->recv_timeout = NGX_CONF_UNSET_MSEC;
266 sscf->keepalive_timeout = NGX_CONF_UNSET_MSEC;
267
268 sscf->headers_comp = NGX_CONF_UNSET;
269
270 return sscf;
271 }
272
273
274 static char *
275 ngx_http_spdy_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
276 {
277 ngx_http_spdy_srv_conf_t *prev = parent;
278 ngx_http_spdy_srv_conf_t *conf = child;
279
280 ngx_conf_merge_size_value(conf->pool_size, prev->pool_size, 4096);
281
282 ngx_conf_merge_uint_value(conf->concurrent_streams,
283 prev->concurrent_streams, 100);
284
285 ngx_conf_merge_uint_value(conf->streams_index_mask,
286 prev->streams_index_mask, 32 - 1);
287
288 ngx_conf_merge_msec_value(conf->recv_timeout,
289 prev->recv_timeout, 30000);
290 ngx_conf_merge_msec_value(conf->keepalive_timeout,
291 prev->keepalive_timeout, 180000);
292
293 ngx_conf_merge_value(conf->headers_comp, prev->headers_comp, 0);
294
295 return NGX_CONF_OK;
296 }
297
298
299 static char *
300 ngx_http_spdy_recv_buffer_size(ngx_conf_t *cf, void *post, void *data)
301 {
302 size_t *sp = data;
303
304 if (*sp <= 2 * NGX_SPDY_STATE_BUFFER_SIZE) {
305 return "value is too small";
306 }
307
308 return NGX_CONF_OK;
309 }
310
311
312 static char *
313 ngx_http_spdy_pool_size(ngx_conf_t *cf, void *post, void *data)
314 {
315 size_t *sp = data;
316
317 if (*sp < NGX_MIN_POOL_SIZE) {
318 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
319 "the pool size must be no less than %uz",
320 NGX_MIN_POOL_SIZE);
321 return NGX_CONF_ERROR;
322 }
323
324 if (*sp % NGX_POOL_ALIGNMENT) {
325 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
326 "the pool size must be a multiple of %uz",
327 NGX_POOL_ALIGNMENT);
328 return NGX_CONF_ERROR;
329 }
330
331 return NGX_CONF_OK;
332 }
333
334
335 static char *
336 ngx_http_spdy_streams_index_mask(ngx_conf_t *cf, void *post, void *data)
337 {
338 ngx_uint_t *np = data;
339
340 ngx_uint_t mask;
341
342 mask = *np - 1;
343
344 if (*np == 0 || (*np & mask)) {
345 return "must be a power of two";
346 }
347
348 *np = mask;
349
350 return NGX_CONF_OK;
351 }