Fix for extensions for server

websocket-sharp/Ext.cs

@@ -426,11 +426,6 @@ namespace WebSocketSharp
              : stream.ToByteArray ();
     }
 
-    internal static bool Equals (this string value, CompressionMethod method)
-    {
-      return value == method.ToCompressionExtension ();
-    }
-
     /// <summary>
     /// Determines whether the specified <see cref="int"/> equals the specified
     /// <see cref="char"/>, and invokes the specified Action&lt;int&gt; delegate
@@ -709,10 +704,9 @@ namespace WebSocketSharp
         null);
     }
 
-    internal static string RemovePrefix (
-      this string value, params string [] prefixes)
+    internal static string RemovePrefix (this string value, params string [] prefixes)
     {
-      int i = 0;
+      var i = 0;
       foreach (var prefix in prefixes) {
         if (value.StartsWith (prefix)) {
           i = prefix.Length;
@@ -728,13 +722,16 @@ namespace WebSocketSharp
     internal static IEnumerable<string> SplitHeaderValue (
       this string value, params char [] separator)
     {
+      var len = value.Length;
       var separators = new string (separator);
-      var buffer = new StringBuilder (64);
-      int len = value.Length;
-      bool quoted = false;
-      bool escaped = false;
-      for (int i = 0; i < len; i++) {
-        char c = value [i];
+
+      var buffer = new StringBuilder (32);
+      var quoted = false;
+      var escaped = false;
+
+      char c;
+      for (var i = 0; i < len; i++) {
+        c = value [i];
         if (c == '"') {
           if (escaped)
             escaped = !escaped;
@@ -749,6 +746,7 @@ namespace WebSocketSharp
           if (!quoted) {
             yield return buffer.ToString ();
             buffer.Length = 0;
+
             continue;
           }
         }
@@ -791,22 +789,22 @@ namespace WebSocketSharp
              : buffer.Reverse ().ToArray ();
     }
 
-    internal static string ToCompressionExtension (this CompressionMethod method)
-    {
-      return method != CompressionMethod.NONE
-             ? String.Format ("permessage-{0}", method.ToString ().ToLower ())
-             : String.Empty;
-    }
-
     internal static CompressionMethod ToCompressionMethod (this string value)
     {
       foreach (CompressionMethod method in Enum.GetValues (typeof (CompressionMethod)))
-        if (value.Equals (method))
+        if (method.ToExtensionString () == value)
           return method;
 
       return CompressionMethod.NONE;
     }
 
+    internal static string ToExtensionString (this CompressionMethod method)
+    {
+      return method != CompressionMethod.NONE
+             ? String.Format ("permessage-{0}", method.ToString ().ToLower ())
+             : String.Empty;
+    }
+
     internal static System.Net.IPAddress ToIPAddress (
       this string hostNameOrAddress)
     {

websocket-sharp/WebSocket.cs

@@ -593,9 +593,7 @@ namespace WebSocketSharp
     {
       _logger.Debug (
         String.Format (
-          "A WebSocket connection request from {0}:\n{1}",
-          _context.UserEndPoint,
-          _context));
+          "A WebSocket connection request from {0}:\n{1}", _context.UserEndPoint, _context));
 
       var msg = checkIfValidHandshakeRequest (_context);
       if (msg != null) {
@@ -608,13 +606,12 @@ namespace WebSocketSharp
       }
 
       if (_protocol != null &&
-          !_context.SecWebSocketProtocols.Contains (
-            protocol => protocol == _protocol))
+          !_context.SecWebSocketProtocols.Contains (protocol => protocol == _protocol))
         _protocol = null;
 
       var extensions = _context.Headers ["Sec-WebSocket-Extensions"];
       if (extensions != null && extensions.Length > 0)
-        processRequestedExtensions (extensions);
+        acceptSecWebSocketExtensionsHeader (extensions);
 
       return send (createHandshakeResponse ());
     }
@@ -636,6 +633,34 @@ namespace WebSocketSharp
       return true;
     }
 
+    // As server
+    private void acceptSecWebSocketExtensionsHeader (string value)
+    {
+      var extensions = new StringBuilder (32);
+
+      var compress = false;
+      foreach (var extension in value.SplitHeaderValue (',')) {
+        var trimed = extension.Trim ();
+        var unprefixed = trimed.RemovePrefix ("x-webkit-");
+
+        if (!compress && unprefixed.IsCompressionExtension ()) {
+          var method = unprefixed.ToCompressionMethod ();
+          if (method != CompressionMethod.NONE) {
+            _compression = method;
+            compress = true;
+
+            extensions.Append (trimed + ", ");
+          }
+        }
+      }
+
+      var len = extensions.Length;
+      if (len > 0) {
+        extensions.Length = len - 2;
+        _extensions = extensions.ToString ();
+      }
+    }
+
     private bool acceptUnsupportedFrame (
       WsFrame frame, CloseStatusCode code, string reason)
     {
@@ -682,8 +707,7 @@ namespace WebSocketSharp
                ? "Invalid Host header."
                : !validateSecWebSocketKeyHeader (headers ["Sec-WebSocket-Key"])
                  ? "Invalid Sec-WebSocket-Key header."
-                 : !validateSecWebSocketVersionClientHeader (
-                     headers ["Sec-WebSocket-Version"])
+                 : !validateSecWebSocketVersionClientHeader (headers ["Sec-WebSocket-Version"])
                    ? "Invalid Sec-WebSocket-Version header."
                    : !validateCookies (context.CookieCollection, _cookies)
                      ? "Invalid Cookies."
@@ -883,8 +907,9 @@ namespace WebSocketSharp
     private string createExtensionsRequest ()
     {
       var extensions = new StringBuilder (32);
+
       if (_compression != CompressionMethod.NONE)
-        extensions.Append (_compression.ToCompressionExtension ());
+        extensions.Append (_compression.ToExtensionString ());
 
       return extensions.Length > 0
              ? extensions.ToString ()
@@ -1015,28 +1040,6 @@ namespace WebSocketSharp
       }
     }
 
-    // As server
-    private void processRequestedExtensions (string extensions)
-    {
-      var comp = false;
-      var buffer = new List<string> ();
-      foreach (var e in extensions.SplitHeaderValue (',')) {
-        var extension = e.Trim ();
-        var tmp = extension.RemovePrefix ("x-webkit-");
-        if (!comp && tmp.IsCompressionExtension ()) {
-          var method = tmp.ToCompressionMethod ();
-          if (method != CompressionMethod.NONE) {
-            _compression = method;
-            comp = true;
-            buffer.Add (extension);
-          }
-        }
-      }
-
-      if (buffer.Count > 0)
-        _extensions = buffer.ToArray ().ToString (", ");
-    }
-
     // As client
     private HandshakeResponse receiveHandshakeResponse ()
     {
@@ -1374,7 +1377,7 @@ namespace WebSocketSharp
 
       var extensions = value.SplitHeaderValue (',');
       if (extensions.Contains (
-            extension => !extension.Trim ().Equals (_compression)))
+            extension => extension.Trim () != _compression.ToExtensionString ()))
         return false;
 
       _extensions = value;