Craigslist with auth

Corresponding Node Server

// Hats off to https://gist.github.com/hackable/1294667

var express = require('express'),
    request = require('request'),
    BufferList = require('bufferlist').BufferList,
    sys = require('sys'),
    fs = require('fs');

var app = express.createServer();

app.get('/', function(req, res) {
  if(req.param("url")) {
    var url = unescape(req.param("url"));
    request({
        uri:url, 
        encoding: 'binary'
      }, function (error, response, body) {
      if (!error && response.statusCode == 200) {
        var data_uri_prefix = "data:" + response.headers["content-type"] + ";base64,";
        var image = new Buffer(body.toString(), "binary").toString("base64");
        var image = data_uri_prefix + image;
        res.send(image);
      }else{
        res.send('you brokes me!!');
      }
      return
    }); 
  }else{
    res.send('Dude. Specify a url');
  }
});

var port = process.env.PORT || 5000;
app.listen(port, function() {
  console.log("Listening on " + port);
});

GreasemonkeyUpload.js

// ==UserScript==
// @name test upload
// @namespace namespace
// @description description
// @include https://post.craigslist.org/*
// @version 1
// ==/UserScript==
$ = unsafeWindow.jQuery; 
 
if (location.search.indexOf('editimage') > -1) {
  GM_xmlhttpRequest({
     method: "GET",
     url: "http://server?url=", //what ever you specify the url to be 
     onload: function(xhr) {
        run(xhr.responseText);
    }
  });
}
function run(data){
    var canvas = document.createElement('canvas'),
    ctx = canvas.getContext('2d'),
    img = new Image();
    img.onload = function() {
        canvas.setAttribute('width', img.width);
        canvas.setAttribute('height', img.height);
        ctx.drawImage(img, 0, 0);
        var blob = canvas.mozGetAsFile('image.jpg');
        sendBlob(blob);
    }
    img.src = data;
}
function sendBlob(file){
    var name1 = $('.addmore form input:nth-child(1)').attr('name');
    var value1 = $('.addmore form input:nth-child(1)').attr('value');
    var name2 = $('.addmore form input:nth-child(2)').attr('name');
     
    // submit as a multipart form, along with any other data
    var form = new FormData();
    var xhr = new XMLHttpRequest();
    xhr.open('POST', location, true); // Post to current URL
    xhr.onreadystatechange = function() {
    if (xhr.readyState == 4) {
        if (xhr.status == 200) { // Success?
                alert('Success');
            } else {
                alert('Error submitting image: ' + xhr.status);
            }
        }
    };
    // Name : Value
    form.append(name1, value1);
    // Name : Value
    form.append(name2, 'add');
    // Name : Value
    form.append('file', file);
    if(confirm('submit?'))
        xhr.send(form);
}

Only submits black images atm

Hells to the yeah. Submits funky bird image