(websocket) fix #167, a long standing issue with sending empty messages with per-message deflate extension (and hopefully other zlib bug)

2020-03-23 15:21:53 -07:00
parent e0733d205c
commit f41a54186c
4 changed files with 12 additions and 4 deletions
--- a/ixwebsocket/IXWebSocketPerMessageDeflateCodec.cpp
+++ b/ixwebsocket/IXWebSocketPerMessageDeflateCodec.cpp
@ -89,8 +89,12 @@ namespace ix

        if (in.empty())
        {
-            uint8_t buf[6] = {0x02, 0x00, 0x00, 0x00, 0xff, 0xff};
-            out.append((char*) (buf), 6);
+            // See issue #167
+            // The normal buffer size should be 6 but
+            // we remove the 4 octets from the tail (#4)
+            uint8_t buf[2] = {0x02, 0x00};
+            out.append((char*) (buf), 2);
+
            return true;
        }