XHR proxy does not support environment HTTP proxy settings

[denandz]

Running the simulator and forwarding traffic through an intercepting HTTP proxy such as fiddler, owasp zap, burp, glorp or so forth, is currently not possible.

This is due to the xhr proxy using the http and https request libraries, which require additional configuration to read proxy configurations from HTTP_PROXY environment variables and so forth.

cordova-simulate/src/server/xhr-proxy.js

Lines 3 to 4 in 5ab7baf

	var http = require('http'),
	https = require('https'),

cordova-simulate/src/server/xhr-proxy.js

Lines 30 to 34 in 5ab7baf

	if (requestURL.protocol === 'https:') {
	proxyRequest = https.request(options, proxyCallback);
	} else {
	proxyRequest = http.request(options, proxyCallback);
	}

Running with HTTP_PROXY=http://127.0.0.1:8080 HTTPS_PROXY=http://127.0.0.1:8080 NODE_TLS_REJECT_UNAUTHORIZED=0 simulate android or similar does not result in XHR calls being sent to the proxy.

The current state:

┌─────────────────────────────┐               ┌─────────┐           ┌───┐
│  Browser simulating Cordova ┼──────────────►│xhr_proxy┼──────────►│API│
└─────────────────────────────┘               └─────────┘           └───┘

What needs be implemented:

┌──────────────────────────┐          ┌─────────┐       ┌──────────┐      ┌───┐
│Browser simulating Cordova┼─────────►│xhr_proxy┼──────►│HTTP_PROXY┼─────►│API│
└──────────────────────────┘          └─────────┘       └──────────┘      └───┘