Support proxying behind corporate proxies

[akshayeshenoi]

The lack of this feature is making it impossible to carry out development behind a corporate proxy. Prior to version 1.0.0, the solution to this problem was assigning the http-proxy-agent object to req.agent (#56 ).

This is not allowed in 1.0.0.

This line seems to provision a custom module, but there's no way I can configure that option.
Are you missing a line here?

@monkpow

[akshayeshenoi]

Looks like you could always pass an http-proxy-agent object to reqOpts.agent using the proxyReqOptDecorator option.

var HttpsProxyAgent = require('http-proxy-agent');

app.use('/proxy', proxy('http://example.com', {
  proxyReqOptDecorator: function (reqOpt, req) {
    reqOpt.agent = new HttpsProxyAgent('http://corporate-proxy.com');
    return reqOpt;
  }
}));