Annotation of embedaddon/nginx/src/http/ngx_http_spdy_module.c, revision 1.1
1.1 ! misho 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: }
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