Invalid content-type regexp

[sekaijin]

Hi line 127: var contentTypeRegExp = /^text\/event\-stream;?(\s*charset\=utf\-8)?$/i;

but the server can send text/event-stream;element-type="application/json" or others types of elements.

;?(\s*charset\=utf\-8)? is not used in your code. I suggest to relax the constraint whith /^text\/event\-stream;?.*$/i; or add support of more complex content-type