我尝试通过ajax解析Google Alert Feed，但我得到了异常。这就是我试过的：
$(document).ready(function () {
$.ajax({
url: 'http://www.google.com/alerts/feeds/01662123773360489091/16526224428036307178',
type: 'GET',
dataType: "xml"
}).done(function(xml) {
$.each($("item", xml), function(i, e) {
$("#results").append($("enclosure").attr("url").text() + "<br />");
});
});
});
但我明白了：
XMLHttpRequest cannot load http://www.google.com/alerts/feeds/01662123773360489091/16526224428036307178. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access.
任何帮助？
P.S：我已经阅读了几篇关于通过ajax和jquery解析rss feed的帖子，但是没有一篇能为我工作。
答案 0 :(得分：3)
抱歉，您将不被允许使用跨域脚本。请在此处查看答案：
jQuery XML REST Access-Control-Allow-Origin
只要REST API的服务器（不是您的服务器）就不可能 server）通过设置CORS允许来自不同源的请求 （跨源资源共享）HTTP标头，例如通过设置 响应中的“Access-Control-Allow-Origin”HTTP标头：
Access-Control-Allow-Origin：*
在查看Google的标题时，他们不会提供该选项：
$ curl -I 'http://www.google.com/alerts/feeds/01662123773360489091/16526224428036307178'
HTTP/1.1 200 OK
Date: Sun, 26 Jan 2014 23:46:50 GMT
Pragma: no-cache
Expires: Fri, 01 Jan 1990 00:00:00 GMT
Cache-Control: no-cache, must-revalidate
Content-Type: text/xml; charset=UTF-8
X-Frame-Options: DENY
Set-Cookie: PREF=ID=3c2ff90717c79524:TM=1390780010:LM=1390780010:S=f9cyzI-rk2Nca7W3; expires=Tue, 26-Jan-2016 23:46:50 GMT; path=/; domain=.google.com
X-Content-Type-Options: nosniff
Server: psfe
X-XSS-Protection: 1; mode=block
Alternate-Protocol: 80:quic
Transfer-Encoding: chunked
您唯一的选择是使用您的服务器获取值，然后将值传递给您的jQuery应用程序。
答案 1 :(得分：3)
您正在与之通话的服务器http://www.google.com/alerts/feeds/...未发回称为Access-Control-Allow-Origin的响应标头。因为它不会发回此标题允许您的网站与其联系，所以您的浏览器会阻止这些请求。这是浏览器实现的安全措施。如果您正在执行此服务器端，则不存在此类限制。但客户端，它有所作为，这些限制已经到位。
您需要创建一个服务器端代理（用C＃/ Python /您的选择编写），然后向您的目标URL发出请求。
换句话说，您的JQuery请求http://example.com/proxy/alerts.py，后者又调用Google Alerts URL，并将其发送到JavaScript。
答案 2 :(得分：0)
您可以通过 answer here on SO 复制粘贴代码。
当然，如果没有尝试从XML中获取确切的名称，它将无法工作。 enclosure不在Feed结果中。
一行php和对该.php文件的AJAX调用：
<强> getFeed.php
<?php echo file_get_contents(htmlspecialchars($_GET['url'])); ?>
<强> yourpage.html
<!DOCTYPE html>
<html>
<head>
<script src="http://code.jquery.com/jquery-2.0.3.min.js"></script>
<meta charset=utf-8 />
<title>Test Feeds by Roko C.B.</title>
</head>
<body>
<p id="feeds"></p>
<script>
$(function(){
var feedsHTML = ""
$("<div/>").load('getFeed.php?url=http://www.google.com/alerts/feeds/01662123773360489091/16526224428036307178', function(response, status, xhr){
var xmlDoc = $.parseXML( response ),
$xml = $( xmlDoc ),
$entry = $xml.find( "entry" );
$.each($entry, function(i){
var title = $(this).find('title').text();
var link = $(this).find('link').attr("href");
feedsHTML += "<a href='"+ link +"'>"+ title +"</a> <br>";
});
$('#feeds').html(feedsHTML);
});
});
</script>
</body>
</html>
概念证明？这是我得到的结果：
<p id="feeds"><a href="https://www.google.com/url?q=http://www.arabnews.com/news/516076&ct=ga&cd=&cad=CAI&usg=AFQjCNFhY_O6hwv7_d9EaA0pIyxFBstrlQ">Premarital drug <b>test</b> 'useless'</a> <br><a href="https://www.google.com/url?q=http://secondgradesugarandspice.blogspot.com/2014/01/ready-to-write-test-prep-practice-for.html&ct=ga&cd=&cad=CAI&usg=AFQjCNH3y_Bf6rk_sPoshh6F5b45308daQ">Sugar and Spice: Ready to Write! <b>Test</b> Prep & Practice For Lil <b>...</b></a> <br><a href="https://www.google.com/url?q=http://www.csmonitor.com/Commentary/the-monitors-view/2014/0126/Ukraine-protests-a-test-for-the-idea-of-progress-as-inevitable&ct=ga&cd=&cad=CAI&usg=AFQjCNG9jCY57FsoCsrOZcP_timbk7odVg">Ukraine protests: a <b>test</b> for the idea of progress as inevitable</a> <br><a href="https://www.google.com/url?q=http://tommorris.org/posts/8757&ct=ga&cd=&cad=CAI&usg=AFQjCNGdE5yyKMLFDlPA-qfq5C_aMn7O3g">The Minimal Viable Vegetarian <b>test</b> - Tom Morris</a> <br><a href="https://www.google.com/url?q=http://www.navy-net.co.uk/joining-up-royal-navy-recruiting/73629-test.html&ct=ga&cd=&cad=CAI&usg=AFQjCNG4-3ZfVeGj1jA7FCBgQsD5jO9lwA"><b>Test</b> - Navy Net</a> <br><a href="https://www.google.com/url?q=http://www.rawstory.com/rs/2014/01/26/dna-test-of-7000-year-old-tooth-overturns-popular-image-of-light-skinned-european-hunter-gatherers/&ct=ga&cd=&cad=CAI&usg=AFQjCNGjqu6y8GTcw1W_MFzen2nR0mBkIQ">DNA <b>test</b> of 7000-year-old tooth overturns popular image of light <b>...</b></a> <br><a href="https://www.google.com/url?q=http://financialadvisercoach.com/2014/01/27/the-4-step-ethics-test-for-financial-professionals/&ct=ga&cd=&cad=CAI&usg=AFQjCNHn-o8toDuYi-PX4buRf0hZCfy4cw">The 4 Step Ethics <b>Test</b> for Financial Professionals – The Financial <b>...</b></a> <br><a href="https://www.google.com/url?q=http://nypost.com/2014/01/26/test-tube-grown-meat-might-be-coming-to-brooklyn/&ct=ga&cd=&cad=CAI&usg=AFQjCNHd8-9mUEGl_VwJXkLDjInWQsGYTA"><b>Test</b> tube grown meat might be coming to Brooklyn</a> <br><a href="https://www.google.com/url?q=http://www.ministryoftesting.com/2014/01/testing-presentations/&ct=ga&cd=&cad=CAI&usg=AFQjCNEfjw4Gr3Io70EVzZCx0lZjq7WOrg"><b>Testing</b> Presentations | Ministry of TestingMinistry of <b>Testing</b></a> <br><a href="https://www.google.com/url?q=http://gospeldrivendisciples.blogspot.com/2014/01/the-test-of-fellowship-part-3.html&ct=ga&cd=&cad=CAI&usg=AFQjCNHX5Q5kZfeHSTo389RAVutxxwHWcg">*Gospel-driven Disciples: The <b>Test</b> of Fellowship (Part 3)</a> <br><a href="https://www.google.com/url?q=http://forums.wpcentral.com/developers-beta-testing/260700-test-livezen-windows-phone.html&ct=ga&cd=&cad=CAI&usg=AFQjCNFjJuCwnVm_FGFbhrnQFuEG54bi2w"><b>Test</b> LiveZen on Windows Phone - Windows Phone Central Forums</a> <br><a href="https://www.google.com/url?q=http://www.clevelandbanner.com/view/full_story/24452083/article-CSCC-to-offer-both-HiSet--GED-tests%3Finstance%3Dlatest_articles&ct=ga&cd=&cad=CAI&usg=AFQjCNEv00h7ou07AOehSP2l16Wmdv-h_Q">CSCC to offer both HiSet, GED <b>tests</b></a> <br><a href="https://www.google.com/url?q=http://www.willitsnews.com/news/ci_24996241/api-school-test-scores-expected-vanish-california-2&ct=ga&cd=&cad=CAI&usg=AFQjCNFyKOmfO9R_E9VYbA6xkYnVmwIO6w">API school <b>test</b> scores expected to vanish in California for 2 years <b>...</b></a> <br><a href="https://www.google.com/url?q=http://www.farmweekly.com.au/news/agriculture/cattle/dairy/preg-test-lifts-dairy-profit/2685288.aspx&ct=ga&cd=&cad=CAI&usg=AFQjCNFFCyCOwYkmo-BmaW44cEXclb8VqA">Preg <b>test</b> lifts dairy profit</a> <br><a href="https://www.google.com/url?q=http://ajw.asahi.com/article/economy/technology/AJ201401270001&ct=ga&cd=&cad=CAI&usg=AFQjCNGXyAR1NLEgPti_Hfm8MJCETjvZtg">Researchers <b>test</b> sail for energy-efficient cargo ship</a> <br><a href="https://www.google.com/url?q=http://bringatrailer.com/2014/01/25/one-of-one-1970-chrysler-electric-test-vehicle-1/&ct=ga&cd=&cad=CAI&usg=AFQjCNHgALMWfD8AHa87pDRzcGGtTFXf6A">One of One: 1970 Chrysler Electric <b>Test</b> Vehicle-1 - Bring a Trailer</a> <br><a href="https://www.google.com/url?q=http://forums.linn.co.uk/bb/showthread.php%3Ftid%3D25860&ct=ga&cd=&cad=CAI&usg=AFQjCNGkR33R46DtOCfuwrqd5wBCC6BvDw">Interesting Hearing Study and <b>Test</b> - Linn Forums</a> <br><a href="https://www.google.com/url?q=http://www.musiccitymiracles.com/2014/1/26/5347204/tennessee-titans-free-agents-sign-test-cut&ct=ga&cd=&cad=CAI&usg=AFQjCNEglk6qoddYkY_H6ISPAyRzteCJ5w">Tennessee Titans free agents: Sign, <b>test</b>, cut - Music City Miracles</a> <br><a href="https://www.google.com/url?q=http://techlorebyigor.blogspot.com/2014/01/passing-my-piss-test.html&ct=ga&cd=&cad=CAI&usg=AFQjCNGFXpQSZbXZL2oKANeYbWA1q2_eng">tech lore by igor: Passing My Piss-<b>Test</b></a> <br><a href="https://www.google.com/url?q=http://www.lenorahenson.com/2014/01/test.html&ct=ga&cd=&cad=CAI&usg=AFQjCNEqPuP8KuzAngKU5jO43pKtK1dahA">The Lenora Aura: <b>test</b></a> <br></p>