--- a/src/http/ngx_http_parse.c
+++ b/src/http/ngx_http_parse.c
@@ -1075,6 +1075,154 @@ header_done:
 
 
 ngx_int_t
+ngx_http_parse_uri(ngx_http_request_t *r)
+{
+    u_char  *p, ch;
+    enum {
+        sw_start = 0,
+        sw_after_slash_in_uri,
+        sw_check_uri,
+        sw_uri
+    } state;
+
+    state = sw_start;
+
+    for (p = r->uri_start; p != r->uri_end; p++) {
+
+        ch = *p;
+
+        switch (state) {
+
+        case sw_start:
+
+            if (ch != '/') {
+                return NGX_ERROR;
+            }
+
+            state = sw_after_slash_in_uri;
+            break;
+
+        /* check "/.", "//", "%", and "\" (Win32) in URI */
+        case sw_after_slash_in_uri:
+
+            if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
+                state = sw_check_uri;
+                break;
+            }
+
+            switch (ch) {
+            case ' ':
+                r->space_in_uri = 1;
+                state = sw_check_uri;
+                break;
+            case '.':
+                r->complex_uri = 1;
+                state = sw_uri;
+                break;
+            case '%':
+                r->quoted_uri = 1;
+                state = sw_uri;
+                break;
+            case '/':
+                r->complex_uri = 1;
+                state = sw_uri;
+                break;
+#if (NGX_WIN32)
+            case '\\':
+                r->complex_uri = 1;
+                state = sw_uri;
+                break;
+#endif
+            case '?':
+                r->args_start = p + 1;
+                state = sw_uri;
+                break;
+            case '#':
+                r->complex_uri = 1;
+                state = sw_uri;
+                break;
+            case '+':
+                r->plus_in_uri = 1;
+                break;
+            default:
+                state = sw_check_uri;
+                break;
+            }
+            break;
+
+        /* check "/", "%" and "\" (Win32) in URI */
+        case sw_check_uri:
+
+            if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
+                break;
+            }
+
+            switch (ch) {
+            case '/':
+#if (NGX_WIN32)
+                if (r->uri_ext == p) {
+                    r->complex_uri = 1;
+                    state = sw_uri;
+                    break;
+                }
+#endif
+                r->uri_ext = NULL;
+                state = sw_after_slash_in_uri;
+                break;
+            case '.':
+                r->uri_ext = p + 1;
+                break;
+            case ' ':
+                r->space_in_uri = 1;
+                break;
+#if (NGX_WIN32)
+            case '\\':
+                r->complex_uri = 1;
+                state = sw_after_slash_in_uri;
+                break;
+#endif
+            case '%':
+                r->quoted_uri = 1;
+                state = sw_uri;
+                break;
+            case '?':
+                r->args_start = p + 1;
+                state = sw_uri;
+                break;
+            case '#':
+                r->complex_uri = 1;
+                state = sw_uri;
+                break;
+            case '+':
+                r->plus_in_uri = 1;
+                break;
+            }
+            break;
+
+        /* URI */
+        case sw_uri:
+
+            if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
+                break;
+            }
+
+            switch (ch) {
+            case ' ':
+                r->space_in_uri = 1;
+                break;
+            case '#':
+                r->complex_uri = 1;
+                break;
+            }
+            break;
+        }
+    }
+
+    return NGX_OK;
+}
+
+
+ngx_int_t
 ngx_http_parse_complex_uri(ngx_http_request_t *r, ngx_uint_t merge_slashes)
 {
     u_char  c, ch, decoded, *p, *u;