Large messages would yield invalid JSON

[webOS101]

Because the forwarding code does not check for end of data, it's possible that a large message from gitter could be chunked into more than one chunk, causing an exception when attempting to parse the partial message.

[phillipuniverse]

@webOS101 thanks for the report, sorry this languished for so long. Do you have an example message that failed? This will be a good use case to add tests.