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    Check if you didn't set RequestProperty Content-Type to the wrong type or if you're trying to send the wrong file to the server.

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via Google Groups by stevenmo, 1 year ago
via GitHub by fangzehua
, 1 year ago
Error while handshaking
java.io.IOException: Invalid Http response	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1331)	at io.socket.IOConnection.handshake(IOConnection.java:303)	at io.socket.IOConnection.access$8(IOConnection.java:282)	at io.socket.IOConnection$ConnectThread.run(IOConnection.java:200)