Feature: add socket io support

[moonrailgun]

Add Socket.IO support, resolves #611

Now is a simple implement , more feature will be append soon.

Pick up some function to separate file, please check it.

By the way, i have not found a public socketio server as a default value, is any good idea to improve it?

[ghost]

DeepCode's analysis on #6a9672 found:

• ❌ 0 critical issues. ⚠️ 0 warnings and 2 minor issues. ✔️ 0 issues were fixed.

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[TravisBuddy]

Hey @moonrailgun,
Your changes look good to me!

View build log

TravisBuddy Request Identifier: 999f8110-5de6-11ea-8706-0d65ca3fb05e

[liyasthomas]

@moonrailgun thanks for the quick PR 🎉

https://amritb.github.io/socketio-client-tool/ fyi this open source tool is feature rich! We can make use of this for future features.

We should allow http/https protocols other than ws/wss for Socket.io endpoints. For ex: https://socket-io-chat.now.sh/ is an socker.io endpoint which will be rejected by current URL validation. Without the https protocol, it works fine though.

By the way, I couldn't find a public socket.io endpoint for default value. Anyways, we'll add that later.

[liyasthomas]

Everything looks good to me.

[TravisBuddy]

Hey @moonrailgun,
Your changes look good to me!

View build log

TravisBuddy Request Identifier: c8f12800-5e00-11ea-8706-0d65ca3fb05e