Socket.io: data strings changes over socket

[yotamgever]

Note: for support questions, please use one of these channels: stackoverflow or slack

You want to:

• [x] report a bug
• [ ] request a feature

Current behaviour

when emitting an object as data and within it using a string of ≥ (or the unicode \u2265) it turns it to the string letter e and ≤ trurns to d

Steps to reproduce (if the current behaviour is a bug)

client side

channel.emit('data', {data:'≥'});

server side

socket.on('data',({data:bla})=>{
console.log(bla); // prints 'e'
});

Note: the best way to get a quick answer is to provide a failing test case, by forking the following fiddle for example.

Expected behaviour

that the data will stay the same consistently

Setup

• OS: Windows
• browser: Chrome 62
• socket.io version: 1.7.2

Other information (e.g. stacktraces, related issues, suggestions how to fix)

[deanshub]

This happens only when the socket hasn't upgraded (first use) over xhr,
after it upgrades to websocket all data is sent correctly

[deanshub]

see #451 and #572

[darrachequesne]

There was an issue regarding utf8 parsing in version 1.x, could you please try with version 2.x ?

Related:

• https://github.com/socketio/socket.io/releases/tag/2.0.0
• https://github.com/socketio/engine.io-parser/pull/81

[deanshub]

tried it with 2.0.4, still happens...
fixed it with encoding and decoding the data with this code:
client side

function strencode( data ) {
    return encodeURIComponent( escape( JSON.stringify( data ) ) );
}

server side

function strdecode( data ) {
    return JSON.parse( unescape( decodeURIComponent( data ) ) );
}

[yotamgever]

Yeah that's seems to be working. Thanks!