new file mode 100644
--- /dev/null
+++ b/src/http/ngx_http_spdy_module.c
@@ -0,0 +1,351 @@
+
+/*
+ * Copyright (C) Nginx, Inc.
+ * Copyright (C) Valentin V. Bartenev
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_http.h>
+#include <ngx_http_spdy_module.h>
+
+
+static ngx_int_t ngx_http_spdy_add_variables(ngx_conf_t *cf);
+
+static ngx_int_t ngx_http_spdy_variable(ngx_http_request_t *r,
+    ngx_http_variable_value_t *v, uintptr_t data);
+static ngx_int_t ngx_http_spdy_request_priority_variable(ngx_http_request_t *r,
+    ngx_http_variable_value_t *v, uintptr_t data);
+
+static ngx_int_t ngx_http_spdy_module_init(ngx_cycle_t *cycle);
+
+static void *ngx_http_spdy_create_main_conf(ngx_conf_t *cf);
+static char *ngx_http_spdy_init_main_conf(ngx_conf_t *cf, void *conf);
+
+static void *ngx_http_spdy_create_srv_conf(ngx_conf_t *cf);
+static char *ngx_http_spdy_merge_srv_conf(ngx_conf_t *cf, void *parent,
+    void *child);
+
+static char *ngx_http_spdy_recv_buffer_size(ngx_conf_t *cf, void *post,
+    void *data);
+static char *ngx_http_spdy_pool_size(ngx_conf_t *cf, void *post, void *data);
+static char *ngx_http_spdy_streams_index_mask(ngx_conf_t *cf, void *post,
+    void *data);
+
+
+static ngx_conf_num_bounds_t  ngx_http_spdy_headers_comp_bounds = {
+    ngx_conf_check_num_bounds, 0, 9
+};
+
+static ngx_conf_post_t  ngx_http_spdy_recv_buffer_size_post =
+    { ngx_http_spdy_recv_buffer_size };
+static ngx_conf_post_t  ngx_http_spdy_pool_size_post =
+    { ngx_http_spdy_pool_size };
+static ngx_conf_post_t  ngx_http_spdy_streams_index_mask_post =
+    { ngx_http_spdy_streams_index_mask };
+
+
+static ngx_command_t  ngx_http_spdy_commands[] = {
+
+    { ngx_string("spdy_recv_buffer_size"),
+      NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_size_slot,
+      NGX_HTTP_MAIN_CONF_OFFSET,
+      offsetof(ngx_http_spdy_main_conf_t, recv_buffer_size),
+      &ngx_http_spdy_recv_buffer_size_post },
+
+    { ngx_string("spdy_pool_size"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_size_slot,
+      NGX_HTTP_SRV_CONF_OFFSET,
+      offsetof(ngx_http_spdy_srv_conf_t, pool_size),
+      &ngx_http_spdy_pool_size_post },
+
+    { ngx_string("spdy_max_concurrent_streams"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_num_slot,
+      NGX_HTTP_SRV_CONF_OFFSET,
+      offsetof(ngx_http_spdy_srv_conf_t, concurrent_streams),
+      NULL },
+
+    { ngx_string("spdy_streams_index_size"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_num_slot,
+      NGX_HTTP_SRV_CONF_OFFSET,
+      offsetof(ngx_http_spdy_srv_conf_t, streams_index_mask),
+      &ngx_http_spdy_streams_index_mask_post },
+
+    { ngx_string("spdy_recv_timeout"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_msec_slot,
+      NGX_HTTP_SRV_CONF_OFFSET,
+      offsetof(ngx_http_spdy_srv_conf_t, recv_timeout),
+      NULL },
+
+    { ngx_string("spdy_keepalive_timeout"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_msec_slot,
+      NGX_HTTP_SRV_CONF_OFFSET,
+      offsetof(ngx_http_spdy_srv_conf_t, keepalive_timeout),
+      NULL },
+
+    { ngx_string("spdy_headers_comp"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_num_slot,
+      NGX_HTTP_SRV_CONF_OFFSET,
+      offsetof(ngx_http_spdy_srv_conf_t, headers_comp),
+      &ngx_http_spdy_headers_comp_bounds },
+
+      ngx_null_command
+};
+
+
+static ngx_http_module_t  ngx_http_spdy_module_ctx = {
+    ngx_http_spdy_add_variables,           /* preconfiguration */
+    NULL,                                  /* postconfiguration */
+
+    ngx_http_spdy_create_main_conf,        /* create main configuration */
+    ngx_http_spdy_init_main_conf,          /* init main configuration */
+
+    ngx_http_spdy_create_srv_conf,         /* create server configuration */
+    ngx_http_spdy_merge_srv_conf,          /* merge server configuration */
+
+    NULL,                                  /* create location configuration */
+    NULL                                   /* merge location configuration */
+};
+
+
+ngx_module_t  ngx_http_spdy_module = {
+    NGX_MODULE_V1,
+    &ngx_http_spdy_module_ctx,             /* module context */
+    ngx_http_spdy_commands,                /* module directives */
+    NGX_HTTP_MODULE,                       /* module type */
+    NULL,                                  /* init master */
+    ngx_http_spdy_module_init,             /* init module */
+    NULL,                                  /* init process */
+    NULL,                                  /* init thread */
+    NULL,                                  /* exit thread */
+    NULL,                                  /* exit process */
+    NULL,                                  /* exit master */
+    NGX_MODULE_V1_PADDING
+};
+
+
+static ngx_http_variable_t  ngx_http_spdy_vars[] = {
+
+    { ngx_string("spdy"), NULL,
+      ngx_http_spdy_variable, 0, 0, 0 },
+
+    { ngx_string("spdy_request_priority"), NULL,
+      ngx_http_spdy_request_priority_variable, 0, 0, 0 },
+
+    { ngx_null_string, NULL, NULL, 0, 0, 0 }
+};
+
+
+static ngx_int_t
+ngx_http_spdy_add_variables(ngx_conf_t *cf)
+{
+   ngx_http_variable_t  *var, *v;
+
+    for (v = ngx_http_spdy_vars; v->name.len; v++) {
+        var = ngx_http_add_variable(cf, &v->name, v->flags);
+        if (var == NULL) {
+            return NGX_ERROR;
+        }
+
+        var->get_handler = v->get_handler;
+        var->data = v->data;
+    }
+
+    return NGX_OK;
+}
+
+
+static ngx_int_t
+ngx_http_spdy_variable(ngx_http_request_t *r,
+    ngx_http_variable_value_t *v, uintptr_t data)
+{
+    if (r->spdy_stream) {
+        v->len = 1;
+        v->valid = 1;
+        v->no_cacheable = 0;
+        v->not_found = 0;
+        v->data = (u_char *) "2";
+
+        return NGX_OK;
+    }
+
+    *v = ngx_http_variable_null_value;
+
+    return NGX_OK;
+}
+
+
+static ngx_int_t
+ngx_http_spdy_request_priority_variable(ngx_http_request_t *r,
+    ngx_http_variable_value_t *v, uintptr_t data)
+{
+    if (r->spdy_stream) {
+        v->len = 1;
+        v->valid = 1;
+        v->no_cacheable = 0;
+        v->not_found = 0;
+
+        v->data = ngx_pnalloc(r->pool, 1);
+        if (v->data == NULL) {
+            return NGX_ERROR;
+        }
+
+        v->data[0] = '0' + (u_char) r->spdy_stream->priority;
+
+        return NGX_OK;
+    }
+
+    *v = ngx_http_variable_null_value;
+
+    return NGX_OK;
+}
+
+
+static ngx_int_t
+ngx_http_spdy_module_init(ngx_cycle_t *cycle)
+{
+    ngx_http_spdy_request_headers_init();
+
+    return NGX_OK;
+}
+
+
+static void *
+ngx_http_spdy_create_main_conf(ngx_conf_t *cf)
+{
+    ngx_http_spdy_main_conf_t  *smcf;
+
+    smcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_spdy_main_conf_t));
+    if (smcf == NULL) {
+        return NULL;
+    }
+
+    smcf->recv_buffer_size = NGX_CONF_UNSET_SIZE;
+
+    return smcf;
+}
+
+
+static char *
+ngx_http_spdy_init_main_conf(ngx_conf_t *cf, void *conf)
+{
+    ngx_http_spdy_main_conf_t *smcf = conf;
+
+    if (smcf->recv_buffer_size == NGX_CONF_UNSET_SIZE) {
+        smcf->recv_buffer_size = 256 * 1024;
+    }
+
+    return NGX_CONF_OK;
+}
+
+
+static void *
+ngx_http_spdy_create_srv_conf(ngx_conf_t *cf)
+{
+    ngx_http_spdy_srv_conf_t  *sscf;
+
+    sscf = ngx_pcalloc(cf->pool, sizeof(ngx_http_spdy_srv_conf_t));
+    if (sscf == NULL) {
+        return NULL;
+    }
+
+    sscf->pool_size = NGX_CONF_UNSET_SIZE;
+
+    sscf->concurrent_streams = NGX_CONF_UNSET_UINT;
+    sscf->streams_index_mask = NGX_CONF_UNSET_UINT;
+
+    sscf->recv_timeout = NGX_CONF_UNSET_MSEC;
+    sscf->keepalive_timeout = NGX_CONF_UNSET_MSEC;
+
+    sscf->headers_comp = NGX_CONF_UNSET;
+
+    return sscf;
+}
+
+
+static char *
+ngx_http_spdy_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
+{
+    ngx_http_spdy_srv_conf_t *prev = parent;
+    ngx_http_spdy_srv_conf_t *conf = child;
+
+    ngx_conf_merge_size_value(conf->pool_size, prev->pool_size, 4096);
+
+    ngx_conf_merge_uint_value(conf->concurrent_streams,
+                              prev->concurrent_streams, 100);
+
+    ngx_conf_merge_uint_value(conf->streams_index_mask,
+                              prev->streams_index_mask, 32 - 1);
+
+    ngx_conf_merge_msec_value(conf->recv_timeout,
+                              prev->recv_timeout, 30000);
+    ngx_conf_merge_msec_value(conf->keepalive_timeout,
+                              prev->keepalive_timeout, 180000);
+
+    ngx_conf_merge_value(conf->headers_comp, prev->headers_comp, 0);
+
+    return NGX_CONF_OK;
+}
+
+
+static char *
+ngx_http_spdy_recv_buffer_size(ngx_conf_t *cf, void *post, void *data)
+{
+    size_t *sp = data;
+
+    if (*sp <= 2 * NGX_SPDY_STATE_BUFFER_SIZE) {
+        return "value is too small";
+    }
+
+    return NGX_CONF_OK;
+}
+
+
+static char *
+ngx_http_spdy_pool_size(ngx_conf_t *cf, void *post, void *data)
+{
+    size_t *sp = data;
+
+    if (*sp < NGX_MIN_POOL_SIZE) {
+        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+                           "the pool size must be no less than %uz",
+                           NGX_MIN_POOL_SIZE);
+        return NGX_CONF_ERROR;
+    }
+
+    if (*sp % NGX_POOL_ALIGNMENT) {
+        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+                           "the pool size must be a multiple of %uz",
+                           NGX_POOL_ALIGNMENT);
+        return NGX_CONF_ERROR;
+    }
+
+    return NGX_CONF_OK;
+}
+
+
+static char *
+ngx_http_spdy_streams_index_mask(ngx_conf_t *cf, void *post, void *data)
+{
+    ngx_uint_t *np = data;
+
+    ngx_uint_t  mask;
+
+    mask = *np - 1;
+
+    if (*np == 0 || (*np & mask)) {
+        return "must be a power of two";
+    }
+
+    *np = mask;
+
+    return NGX_CONF_OK;
+}