Using Proxy

google.requestOptions = {
  proxy: 'http://12.41.141.10:8080',
  timeout: 30000,
  localAddress: '127.0.0.1',
  jar: true,
  headers: {
    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
    'Accept-Encoding': 'gzip, deflate',
    'Accept-Language': 'en;q=0.5',
    'Cache-Control': 'max-age=0',
    'Connection': 'keep-alive',
    'DNT': 1,
    'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.75 Safari/537.36'
  }
}

If I use a proxy and some other headers, I just get this error:

Error: Error on response:Error: connect EADDRNOTAVAIL 12.41.141.10:8080 - Local (127.0.0.1:58302) : undefined
    at Request._callback (/Users/john/Work/www/myapp/node_modules/google/lib/google.js:98:16)
    at self.callback (/Users/john/Work/www/myapp/node_modules/request/request.js:186:22)
    at emitOne (events.js:96:13)
    at Request.emit (events.js:188:7)
    at Request.onRequestError (/Users/john/Work/www/myapp/node_modules/request/request.js:845:8)
    at emitOne (events.js:96:13)
    at ClientRequest.emit (events.js:188:7)
    at Socket.socketErrorListener (_http_client.js:310:9)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:188:7)
/Users/john/Work/www/myapp/scrape.js:25
  for (var i = 0; i < res.links.length; ++i) {
                         ^

TypeError: Cannot read property 'links' of null
    at /Users/john/Work/www/myapp/scrape.js:25:26
    at Request._callback (/Users/john/Work/www/myapp/node_modules/google/lib/google.js:98:7)
    at self.callback (/Users/john/Work/www/myapp/node_modules/request/request.js:186:22)
    at emitOne (events.js:96:13)
    at Request.emit (events.js:188:7)
    at Request.onRequestError (/Users/john/Work/www/myapp/node_modules/request/request.js:845:8)
    at emitOne (events.js:96:13)
    at ClientRequest.emit (events.js:188:7)
    at Socket.socketErrorListener (_http_client.js:310:9)
    at emitOne (events.js:96:13)

Start by reproducing the proxy request and inspect lib/google.js around the callback at line 98, along with the failing usage in scrape.js at line 25. Determine whether the reported connection error or the subsequent null response is the issue, then verify the chosen behavior with a focused reproduction or test.