Example of filepicker.io requests with `X-Forwarded-For` header resulting in 404.

example.text

> WORKING=yes node request.js
STATUS: 200

> WORKING=no node request.js
STATUS: 404

request.js

var http = require('http');

var working = {}

working.yes = {
  hostname: 'www.filepicker.io',
  port: 80,
  method: 'GET',
  path: '/api/file/Umgh0Q0SKejjXxAr7FVw/convert?w=110&h=100&fit=crop&align=faces&cache=true',
  headers: {
    "x-varnish":"2021007451",
    "x-timer":"S1376006935.645165682,VS0",
    "x-request-start":"1376006935759",
    "x-forwarded-proto":"http",
    "x-forwarded-port":"80",
    "x-forwarded-host":"www.filepicker.io", // not necessary, but interesting
    "x-forwarded-for":"199.27.77.21",
    "user-agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.95 Safari/537.36",
    "host":"www.filepicker.io",
    "fastly-orig-host":"fbio-test.goodeggs.com",
    "fastly-ff":"cache-sv61-SJC3",
    "fastly-client-ip":"173.247.204.122",
    "connection":"close",
    "accept-language":"en-US,en;q=0.8",
    "accept-encoding":"gzip",
    "accept":"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"
  }
}

working.no = {
  hostname: 'www.filepicker.io',
  port: 80,
  method: 'GET',
  path: '/api/file/Umgh0Q0SKejjXxAr7FVw/convert?w=110&h=100&fit=crop&align=faces&cache=true',
  headers: {
    "x-varnish": "2010962303, 662837607",
    "x-timer":"S1376005777.287178993,VS0",
    "x-request-start":"1376005777405",
    "x-forwarded-server":"cache-sv61.a.ssl.fastly.net",
    "x-forwarded-proto":"http",
    "x-forwarded-port":"80",
    "x-forwarded-host":"fbio-test.goodeggs.com",
    "x-forwarded-for":"173.247.204.122, 199.27.77.22",
    "user-agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.95 Safari/537.36",
    "host":"www.filepicker.io",
    "fastly-ssl":"1",
    "fastly-orig-host":"fbio-test.goodeggs.com",
    "fastly-ff":"cache-sv61-SJC3, cache-sv62-SJC3",
    "fastly-client-ip":"173.247.204.122",
    "fastly-client":"1",
    "connection":"close",
    "accept-language":"en-US,en;q=0.8",
    "accept-encoding":"gzip",
    "accept":"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"
  }
}

http.request(working[process.env['WORKING']], function(res) {
  console.log('STATUS: ' + res.statusCode);
}).end();