PlatformIO update fails behind proxy

[ADeeds]

---

Configuration

Operating system:

OSX 10.11.6

PlatformIO Version (platformio --version):

3.4.1

Description of problem

the platformio update command fails when used behind a proxy, even when $http_proxy & friends are properly configured. I belief this is because the internet_on function in util.py tries to make a direct socket connection and barfs when it hits the proxy

Steps to Reproduce

1. Install platformio on a computer that is connected to the internet via a proxy
2. Install some libraries, boards, etc. (platformio install doesn't check the internet_on function, so it works as expected)
3. Run platformio update. Every package shows "off-line" as the status and never gets updated (unless you uninstall it and reinstall)

Actual Results

Every package shows as [Off-line]

Expected Results

[Up-to-date] or whatever it says when packages are out of date (and ideally it would update stuff that was old)

If problems with PlatformIO Build System:

Source file to reproduce issue:

import urllib2
import socket

timeout = 3;
try:
	socket.setdefaulttimeout(timeout)
	socket.socket(socket.AF_INET, socket.SOCK_STREAM).connect(('example.com', 80))
	print('yay')
except:
	print('no')
try:
	urllib2.urlopen('http://example.com', timeout=timeout)
	print('yay')
except:
	print('no')

Additional info

Replacing the direct socket stuff with urllib2 as shown in the example above seems to do the right thing on my end. Plus I think it fixes any future issue with ipv6 compatibility :)

[ivankravets]

Thanks a lot for the report! I don't know why didn't use requests directly.

Please re-test http://docs.platformio.org/en/latest/installation.html#development-version

[ivankravets]

Fixed in fc7f1c0

[ADeeds]

Works great, thanks!