crx-test - Chrome插件开发-请问如何跨域XMLHttpRequest中修改Referer

background.js

chrome.webRequest.onBeforeSendHeaders.addListener(
    function(details) {
        if (details.type === 'xmlhttprequest') {
            var exists = false;
            for (var i = 0; i < details.requestHeaders.length; ++i) {
                if (details.requestHeaders[i].name === 'Referer') {
                    exists = true;
                    details.requestHeaders[i].value = 'http://www.baidu.com';
                    break;
                }
            }

            if (!exists) {
             details.requestHeaders.push({ name: 'Referer', value: 'http://www.baidu.com'});
            }

            return { requestHeaders: details.requestHeaders };
        }
    },
    {urls: ['http://www.geekpark.net/ajax/*']},
    ["blocking", "requestHeaders"]
);


var url = 'http://www.geekpark.net/ajax/load_seeds/?order=undefined&type=img&tag_id=160388&start=36&num=12&tt=1366382330986&t=';

function test() {
    var xhr = new XMLHttpRequest();
    xhr.open('GET', url, true);
    xhr.onreadystatechange = function() {
      if (xhr.readyState === 4) {
        if (xhr.status === 200) {
            var seeds = JSON.parse(xhr.responseText).data.seeds;
            for (var i in seeds) {
                console.log(' - ' + seeds[i].title)
            }
        }
      }
    }
    xhr.send();
}

setInterval(test, 3000);

manifest.json

{
  "name": "crx-test",
  "version": "1.0",
  "manifest_version": 2,
  "description": "Chrome插件开发-请问如何跨域XMLHttpRequest中修改Referer",
  "background": { "scripts": ["background.js"] },
  "permissions": [
    "webRequest", "webRequestBlocking", "http://www.geekpark.net/ajax/"
  ]
}