应该可以用YQL自定义表+ JS XHR，看看: http://developer.yahoo.com/yql/guide/index.html

我用它来做一些客户端(js) html抓取，工作很好 (我有一个完整的音频播放器，搜索互联网/播放列表/歌词/最后调频信息，所有客户端js + YQL)

更新:在继续之前，每个人都应该阅读并理解html5rocks关于CORS的教程。它很容易理解，也很清楚。

如果您控制被post的服务器，只需通过在服务器上设置响应头来利用“跨源资源共享标准”。这个答案在本帖的其他答案中讨论过，但在我看来不是很清楚。

简而言之，下面是如何完成从from.com/1.html到to.com/postHere.php的跨域POST(以PHP为例)。注意:你只需要为NON OPTIONS请求设置Access-Control-Allow-Origin -这个例子总是为一个较小的代码片段设置所有的头部。

In postHere.php setup the following: switch ($_SERVER['HTTP_ORIGIN']) { case 'http://from.com': case 'https://from.com': header('Access-Control-Allow-Origin: '.$_SERVER['HTTP_ORIGIN']); header('Access-Control-Allow-Methods: GET, PUT, POST, DELETE, OPTIONS'); header('Access-Control-Max-Age: 1000'); header('Access-Control-Allow-Headers: Content-Type, Authorization, X-Requested-With'); break; } This allows your script to make cross domain POST, GET and OPTIONS. This will become clear as you continue to read... Setup your cross domain POST from JS (jQuery example): $.ajax({ type: 'POST', url: 'https://to.com/postHere.php', crossDomain: true, data: '{"some":"json"}', dataType: 'json', success: function(responseData, textStatus, jqXHR) { var value = responseData.someKey; }, error: function (responseData, textStatus, errorThrown) { alert('POST failed.'); } });

When you do the POST in step 2, your browser will send a "OPTIONS" method to the server. This is a "sniff" by the browser to see if the server is cool with you POSTing to it. The server responds with an "Access-Control-Allow-Origin" telling the browser its OK to POST|GET|ORIGIN if request originated from "http://from.com" or "https://from.com". Since the server is OK with it, the browser will make a 2nd request (this time a POST). It is good practice to have your client set the content type it is sending - so you'll need to allow that as well.

MDN有一篇关于HTTP访问控制的文章，详细介绍了整个流程是如何工作的。根据他们的文档，它应该“在支持跨站XMLHttpRequest的浏览器中工作”。这有点误导，然而，因为我认为只有现代浏览器允许跨域POST。我只验证了这适用于safari,chrome,FF 3.6。

如果你这样做，请记住以下几点:

Your server will have to handle 2 requests per operation You will have to think about the security implications. Be careful before doing something like 'Access-Control-Allow-Origin: *' This wont work on mobile browsers. In my experience they do not allow cross domain POST at all. I've tested android, iPad, iPhone There is a pretty big bug in FF < 3.6 where if the server returns a non 400 response code AND there is a response body (validation errors for example), FF 3.6 wont get the response body. This is a huge pain in the ass, since you cant use good REST practices. See bug here (its filed under jQuery, but my guess is its a FF bug - seems to be fixed in FF4). Always return the headers above, not just on OPTION requests. FF needs it in the response from the POST.

Create two hidden iframes (add "display: none;" to the css style). Make your second iframe point to something on your own domain. Create a hidden form, set its method to "post" with target = your first iframe, and optionally set enctype to "multipart/form-data" (I'm thinking you want to do POST because you want to send multipart data like pictures?) When ready, make the form submit() the POST. If you can get the other domain to return javascript that will do Cross-Domain Communication With Iframes (http://softwareas.com/cross-domain-communication-with-iframes) then you are in luck, and you can capture the response as well.

当然，如果您想使用您的服务器作为代理，您可以避免所有这些。只需将表单提交到您自己的服务器，该服务器将把请求代理到另一个服务器(假设另一个服务器没有设置为注意到IP差异)，获得响应，并返回您想要的任何内容。

检查http://taiyolab.com/mbtweet/scripts/twitterapi_call.js中的post_method函数——这是上面描述的iframe方法的一个很好的例子。

这是一个老问题，但一些新技术可能会帮助人们解决这个问题。

如果你有对其他服务器的管理访问权限，那么你可以使用开源Forge项目来完成你的跨域POST。Forge提供了一个跨域JavaScript XmlHttpRequest包装器，它利用了Flash的原始套接字API。POST甚至可以通过TLS完成。

您需要对您要发布的服务器进行管理访问的原因是，您必须提供一个跨域策略，允许从您的域进行访问。

http://github.com/digitalbazaar/forge

我认为最好的方法是使用XMLHttpRequest(例如:jQuery中的$.ajax()， $.post())与跨起源资源共享polyfills之一https://github.com/Modernizr/Modernizr/wiki/HTML5-Cross-Browser-Polyfills#wiki-CORS