--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -31,7 +31,8 @@ static ngx_int_t ngx_http_process_cookie
 
 static ngx_int_t ngx_http_process_request_header(ngx_http_request_t *r);
 static void ngx_http_process_request(ngx_http_request_t *r);
-static ssize_t ngx_http_validate_host(u_char *host, size_t len);
+static ssize_t ngx_http_validate_host(ngx_http_request_t *r, u_char **host,
+    size_t len, ngx_uint_t alloc);
 static ngx_int_t ngx_http_find_virtual_server(ngx_http_request_t *r,
     u_char *host, size_t len);
 
@@ -87,6 +88,10 @@ ngx_http_header_t  ngx_http_headers_in[]
                  offsetof(ngx_http_headers_in_t, if_modified_since),
                  ngx_http_process_unique_header_line },
 
+    { ngx_string("If-Unmodified-Since"),
+                 offsetof(ngx_http_headers_in_t, if_unmodified_since),
+                 ngx_http_process_unique_header_line },
+
     { ngx_string("User-Agent"), offsetof(ngx_http_headers_in_t, user_agent),
                  ngx_http_process_user_agent },
 
@@ -380,7 +385,7 @@ ngx_http_init_request(ngx_event_t *rev)
     r->virtual_names = addr_conf->virtual_names;
 
     /* the default server configuration for the address:port */
-    cscf = addr_conf->core_srv_conf;
+    cscf = addr_conf->default_server;
 
     r->main_conf = cscf->ctx->main_conf;
     r->srv_conf = cscf->ctx->srv_conf;
@@ -554,7 +559,7 @@ ngx_http_ssl_handshake(ngx_event_t *rev)
     }
 
     if (n == 1) {
-        if (buf[0] == 0x80 /* SSLv2 */ || buf[0] == 0x16 /* SSLv3/TLSv1 */) {
+        if (buf[0] & 0x80 /* SSLv2 */ || buf[0] == 0x16 /* SSLv3/TLSv1 */) {
             ngx_log_debug1(NGX_LOG_DEBUG_HTTP, rev->log, 0,
                            "https ssl handshake: 0x%02Xd", buf[0]);
 
@@ -627,6 +632,7 @@ int
 ngx_http_ssl_servername(ngx_ssl_conn_t *ssl_conn, int *ad, void *arg)
 {
     size_t                    len;
+    u_char                   *host;
     const char               *servername;
     ngx_connection_t         *c;
     ngx_http_request_t       *r;
@@ -651,7 +657,15 @@ ngx_http_ssl_servername(ngx_ssl_conn_t *
 
     r = c->data;
 
-    if (ngx_http_find_virtual_server(r, (u_char *) servername, len) != NGX_OK) {
+    host = (u_char *) servername;
+
+    len = ngx_http_validate_host(r, &host, len, 1);
+
+    if (len <= 0) {
+        return SSL_TLSEXT_ERR_NOACK;
+    }
+
+    if (ngx_http_find_virtual_server(r, host, len) != NGX_OK) {
         return SSL_TLSEXT_ERR_NOACK;
     }
 
@@ -670,6 +684,7 @@ ngx_http_ssl_servername(ngx_ssl_conn_t *
 static void
 ngx_http_process_request_line(ngx_event_t *rev)
 {
+    u_char                    *host;
     ssize_t                    n;
     ngx_int_t                  rc, rv;
     ngx_connection_t          *c;
@@ -745,6 +760,7 @@ ngx_http_process_request_line(ngx_event_
             r->unparsed_uri.len = r->uri_end - r->uri_start;
             r->unparsed_uri.data = r->uri_start;
 
+            r->valid_unparsed_uri = r->space_in_uri ? 0 : 1;
 
             r->method_name.len = r->method_end - r->request_start + 1;
             r->method_name.data = r->request_line.data;
@@ -777,14 +793,31 @@ ngx_http_process_request_line(ngx_event_
 
             p = r->uri.data + r->uri.len - 1;
 
-            if (*p == '.') {
-
-                while (--p > r->uri.data && *p == '.') { /* void */ }
-
+            while (p > r->uri.data) {
+
+                if (*p == ' ') {
+                    p--;
+                    continue;
+                }
+
+                if (*p == '.') {
+                    p--;
+                    continue;
+                }
+
+                if (ngx_strncasecmp(p - 6, (u_char *) "::$data", 7) == 0) {
+                    p -= 7;
+                    continue;
+                }
+
+                break;
+            }
+
+            if (p != r->uri.data + r->uri.len - 1) {
                 r->uri.len = p + 1 - r->uri.data;
-
                 ngx_http_set_exten(r);
             }
+
             }
 #endif
 
@@ -801,18 +834,25 @@ ngx_http_process_request_line(ngx_event_
                            "http exten: \"%V\"", &r->exten);
 
             if (r->host_start && r->host_end) {
-                n = ngx_http_validate_host(r->host_start,
-                                           r->host_end - r->host_start);
-
-                if (n <= 0) {
+
+                host = r->host_start;
+                n = ngx_http_validate_host(r, &host,
+                                           r->host_end - r->host_start, 0);
+
+                if (n == 0) {
                     ngx_log_error(NGX_LOG_INFO, c->log, 0,
                                   "client sent invalid host in request line");
                     ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
                     return;
                 }
 
+                if (n < 0) {
+                    ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
+                    return;
+                }
+
                 r->headers_in.server.len = n;
-                r->headers_in.server.data = r->host_start;
+                r->headers_in.server.data = host;
             }
 
             if (r->http_version < NGX_HTTP_VERSION_10) {
@@ -936,9 +976,20 @@ ngx_http_process_request_headers(ngx_eve
                 }
 
                 if (rv == NGX_DECLINED) {
-                    len = r->header_in->end - r->header_name_start;
                     p = r->header_name_start;
 
+                    r->lingering_close = 1;
+
+                    if (p == NULL) {
+                        ngx_log_error(NGX_LOG_INFO, c->log, 0,
+                                      "client sent too large request");
+                        ngx_http_finalize_request(r,
+                                            NGX_HTTP_REQUEST_HEADER_TOO_LARGE);
+                        return;
+                    }
+
+                    len = r->header_in->end - p;
+
                     if (len > NGX_MAX_ERROR_STR - 300) {
                         len = NGX_MAX_ERROR_STR - 300;
                         p[len++] = '.'; p[len++] = '.'; p[len++] = '.';
@@ -947,7 +998,9 @@ ngx_http_process_request_headers(ngx_eve
                     ngx_log_error(NGX_LOG_INFO, c->log, 0,
                                   "client sent too long header line: \"%*s\"",
                                   len, r->header_name_start);
-                    ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
+
+                    ngx_http_finalize_request(r,
+                                            NGX_HTTP_REQUEST_HEADER_TOO_LARGE);
                     return;
                 }
             }
@@ -1312,27 +1365,34 @@ static ngx_int_t
 ngx_http_process_host(ngx_http_request_t *r, ngx_table_elt_t *h,
     ngx_uint_t offset)
 {
-    ssize_t  len;
+    u_char   *host;
+    ssize_t   len;
 
     if (r->headers_in.host == NULL) {
         r->headers_in.host = h;
     }
 
-    len = ngx_http_validate_host(h->value.data, h->value.len);
-
-    if (len <= 0) {
+    host = h->value.data;
+    len = ngx_http_validate_host(r, &host, h->value.len, 0);
+
+    if (len == 0) {
         ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
                       "client sent invalid host header");
         ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
         return NGX_ERROR;
     }
 
+    if (len < 0) {
+        ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
+        return NGX_ERROR;
+    }
+
     if (r->headers_in.server.len) {
         return NGX_OK;
     }
 
     r->headers_in.server.len = len;
-    r->headers_in.server.data = h->value.data;
+    r->headers_in.server.data = host;
 
     return NGX_OK;
 }
@@ -1412,6 +1472,12 @@ ngx_http_process_user_agent(ngx_http_req
         if (ngx_strstrn(user_agent, "Gecko/", 6 - 1)) {
             r->headers_in.gecko = 1;
 
+        } else if (ngx_strstrn(user_agent, "Chrome/", 7 - 1)) {
+            r->headers_in.chrome = 1;
+
+        } else if (ngx_strstrn(user_agent, "Safari/", 7 - 1)) {
+            r->headers_in.safari = 1;
+
         } else if (ngx_strstrn(user_agent, "Konqueror", 9 - 1)) {
             r->headers_in.konqueror = 1;
         }
@@ -1588,21 +1654,23 @@ ngx_http_process_request(ngx_http_reques
 
 
 static ssize_t
-ngx_http_validate_host(u_char *host, size_t len)
+ngx_http_validate_host(ngx_http_request_t *r, u_char **host, size_t len,
+    ngx_uint_t alloc)
 {
-    u_char      ch;
-    size_t      i, last;
-    ngx_uint_t  dot;
+    u_char      *h, ch;
+    size_t       i, last;
+    ngx_uint_t   dot;
 
     last = len;
+    h = *host;
     dot = 0;
 
     for (i = 0; i < len; i++) {
-        ch = host[i];
+        ch = h[i];
 
         if (ch == '.') {
             if (dot) {
-                return -1;
+                return 0;
             }
 
             dot = 1;
@@ -1617,7 +1685,11 @@ ngx_http_validate_host(u_char *host, siz
         }
 
         if (ngx_path_separator(ch) || ch == '\0') {
-            return -1;
+            return 0;
+        }
+
+        if (ch >= 'A' || ch < 'Z') {
+            alloc = 1;
         }
     }
 
@@ -1625,6 +1697,15 @@ ngx_http_validate_host(u_char *host, siz
         last--;
     }
 
+    if (alloc) {
+        *host = ngx_pnalloc(r->pool, last) ;
+        if (*host == NULL) {
+            return -1;
+        }
+
+        ngx_strlow(*host, h, last);
+    }
+
     return last;
 }
 
@@ -1632,29 +1713,15 @@ ngx_http_validate_host(u_char *host, siz
 static ngx_int_t
 ngx_http_find_virtual_server(ngx_http_request_t *r, u_char *host, size_t len)
 {
-    u_char                    *server;
-    ngx_uint_t                 hash;
     ngx_http_core_loc_conf_t  *clcf;
     ngx_http_core_srv_conf_t  *cscf;
-    u_char                     buf[32];
 
     if (r->virtual_names == NULL) {
         return NGX_DECLINED;
     }
 
-    if (len <= 32) {
-        server = buf;
-
-    } else {
-        server = ngx_pnalloc(r->pool, len);
-        if (server == NULL) {
-            return NGX_ERROR;
-        }
-    }
-
-    hash = ngx_hash_strlow(server, host, len);
-
-    cscf = ngx_hash_find_combined(&r->virtual_names->names, hash, server, len);
+    cscf = ngx_hash_find_combined(&r->virtual_names->names,
+                                  ngx_hash_key(host, len), host, len);
 
     if (cscf) {
         goto found;
@@ -1662,64 +1729,31 @@ ngx_http_find_virtual_server(ngx_http_re
 
 #if (NGX_PCRE)
 
-    if (r->virtual_names->nregex) {
-        size_t                   ncaptures;
+    if (len && r->virtual_names->nregex) {
         ngx_int_t                n;
         ngx_uint_t               i;
         ngx_str_t                name;
         ngx_http_server_name_t  *sn;
 
         name.len = len;
-        name.data = server;
-
-        ncaptures = 0;
+        name.data = host;
 
         sn = r->virtual_names->regex;
 
         for (i = 0; i < r->virtual_names->nregex; i++) {
 
-            if (sn[i].captures && r->captures == NULL) {
-
-                ncaptures = (NGX_HTTP_MAX_CAPTURES + 1) * 3;
-
-                r->captures = ngx_palloc(r->pool, ncaptures * sizeof(int));
-                if (r->captures == NULL) {
-                    return NGX_ERROR;
-                }
-
-                if (server == buf) {
-                    server = ngx_pnalloc(r->pool, len);
-                    if (server == NULL) {
-                        return NGX_ERROR;
-                    }
-
-                    ngx_memcpy(server, buf, len);
-                    name.data = server;
-                }
+            n = ngx_http_regex_exec(r, sn[i].regex, &name);
+
+            if (n == NGX_OK) {
+                cscf = sn[i].server;
+                goto found;
             }
 
-            n = ngx_regex_exec(sn[i].regex, &name, r->captures, ncaptures);
-
-            if (n == NGX_REGEX_NO_MATCHED) {
+            if (n == NGX_DECLINED) {
                 continue;
             }
 
-            if (n < 0) {
-                ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
-                              ngx_regex_exec_n
-                              " failed: %d on \"%V\" using \"%V\"",
-                              n, &name, &sn[i].name);
-                return NGX_ERROR;
-            }
-
-            /* match */
-
-            cscf = sn[i].core_srv_conf;
-
-            r->ncaptures = ncaptures;
-            r->captures_data = server;
-
-            goto found;
+            return NGX_ERROR;
         }
     }
 
@@ -1993,6 +2027,7 @@ ngx_http_finalize_request(ngx_http_reque
     }
 
     r->done = 1;
+    r->write_event_handler = ngx_http_request_empty_handler;
 
     if (!r->post_action) {
         r->request_complete = 1;
@@ -2032,6 +2067,10 @@ ngx_http_terminate_request(ngx_http_requ
     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                    "http terminate request count:%d", mr->count);
 
+    if (rc > 0 && (mr->headers_out.status == 0 || mr->connection->sent == 0)) {
+        mr->headers_out.status = rc;
+    }
+
     cln = mr->cleanup;
     mr->cleanup = NULL;
 
@@ -2081,13 +2120,24 @@ ngx_http_finalize_connection(ngx_http_re
 {
     ngx_http_core_loc_conf_t  *clcf;
 
+    clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
+
     if (r->main->count != 1) {
+
+        if (r->discard_body) {
+            r->read_event_handler = ngx_http_discarded_request_body_handler;
+
+            if (r->lingering_time == 0) {
+                r->lingering_time = ngx_time()
+                                      + (time_t) (clcf->lingering_time / 1000);
+                ngx_add_timer(r->connection->read, clcf->lingering_timeout);
+            }
+        }
+
         ngx_http_close_request(r, 0);
         return;
     }
 
-    clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
-
     if (!ngx_terminate
          && !ngx_exiting
          && r->keepalive
@@ -2113,7 +2163,9 @@ ngx_http_set_write_handler(ngx_http_requ
 
     r->http_state = NGX_HTTP_WRITING_REQUEST_STATE;
 
-    r->read_event_handler = ngx_http_test_reading;
+    r->read_event_handler = r->discard_body ?
+                                ngx_http_discarded_request_body_handler:
+                                ngx_http_test_reading;
     r->write_event_handler = ngx_http_writer;
 
     wev = r->connection->write;
@@ -2215,6 +2267,8 @@ ngx_http_writer(ngx_http_request_t *r)
     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, wev->log, 0,
                    "http writer done: \"%V?%V\"", &r->uri, &r->args);
 
+    r->write_event_handler = ngx_http_request_empty_handler;
+
     ngx_http_finalize_request(r, rc);
 }
 
@@ -2391,6 +2445,8 @@ ngx_http_set_keepalive(ngx_http_request_
         }
     }
 
+    r->keepalive = 0;
+
     ngx_http_free_request(r, 0);
 
     c->data = hc;
@@ -2538,6 +2594,7 @@ ngx_http_set_keepalive(ngx_http_request_
 #endif
 
     c->idle = 1;
+    ngx_reusable_connection(c, 1);
 
     if (rev->ready) {
         ngx_post_event(rev, &ngx_posted_events);
@@ -2647,6 +2704,7 @@ ngx_http_keepalive_handler(ngx_event_t *
     c->log->action = "reading client request line";
 
     c->idle = 0;
+    ngx_reusable_connection(c, 0);
 
     ngx_http_init_request(rev);
 }