createConnection option not work for https module

[yibopi]

Version: v10.13.0
Platform: Linux 4.15.0-39-generic x86_64

I am trying to use the createConnection option in the https module to set the client local port (localPort=34567 in the example below), but this only works when port = 80, not when port = 443. Following is the code I used to test. Does it mean that https module cannot set a custom socket for https in this way? Thanks.

const https = require('https');
const url = require('url');

var req = https.get({
    host: 'google.com',
    pathname: '/',
    port: 443,   // works when equal to 80, but not 443
    family: 4,
    localPort: 34567,
    createConnection: require('net').createConnection
}, function(res) {
    console.log('localPort:', req.socket.localPort, "remotePort:", req.socket.remotePort);
});

req.on('error', console.error);

[Trott]

@nodejs/http Seems like a legit bug in the https module?

[yibopi]

@leeight , thanks.
Adding localPort does enforce the local port, but it cannot be used together with the createConnection option. Why createConnection only works for http, not https?

[cjihrig]

but this only works when port = 80, not when port = 443
Why createConnection only works for http, not https?

I thinks it's because net.createConnection() and port 80 use HTTP, not HTTPS. The HTTPS agent's createConnection() is built around tls.connect().

[eecs441staff]

@cjihrig creatConnection is useful for opening a custom socket. Can this feature be added for HTTPS? Or is there a way to customize socket for HTTPS? Thanks!

[cjihrig]

@eecs441staff does createConnection: require('tls').connect not work for you?

[eecs441staff]

@cjihrig It worked! Thanks.

[Trott]

Sounds to me like this can be closed, but comment and/or re-open if I've misunderstood.