Summary

Trying to do a HTTPS request with a HTTP proxy fails.

const req = await axios({
  url: 'https://somedomain.com',
  proxy: {
    host: '89.151.146.7',
    port: 6060,
    auth: {
      username: 'myname',
      password: 'mypass',
    },
  },
});

Results in:

Error: write EPROTO 140736379442112:error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:../deps/openssl/openssl/ssl/s23_clnt.c:794

The problem is already described by @chovy in this ticket, which ended up closed as OP did not have the same problem: #662

@chovy says:

I still have this issue not being able to hit an https url with an http proxy. I can do it fine in request and also in curl from shell. Something not working with axios. I get an EPROTO error.

### Context

• axios version: v0.16.1
• Environment: node v7.10.0, Mac OSX Sierra