GWT Web应用程序试图从PHP获取json [英] GWT web app trying to get json from PHP

问题描述

我有一个GWT应用程序，我正在使用RequestBuilder从我在Fatcow.com服务器上运行的PHP脚本获取GET JSON.它在浏览器中返回的json很好，并且在Charles Web调试代理中返回200的状态，但是在GWT应用程序中，它总是说响应状态为0，并且不给我任何json.当我在一个已知的工作URL上测试我的代码时，它返回200，我得到了我期望的json.另外，我已经有了header('Content-Type:application/json; charset = utf-8');在我的php中，我知道这是一个常见错误.是否有任何理由将无法正常工作?这是PHP的事情，还是我做错了什么?

I have a GWT app and I'm using RequestBuilder get GET some json from a php script I have running on a Fatcow.com server. It returns the json just fine in the browser and returns a 200 status in Charles web debug proxy, but in the GWT app it always says the response status is 0 and doesn't give me any json. When I test my code on a known working URL, it returns 200 and I get the json I expect. Also, I already have header('Content-Type: application/json; charset=utf-8'); in my php, which I know is a common error. Is there any reason this would not be working? Is it a php thing, or am I doing something wrong?

推荐答案

您遇到的是 Same-Origin政策.

CORS 是受支持在最新的浏览器中(例外:IE和Opera；将分别在IE 10和Opera 12中提供).

CORS is supported in most recent browsers (exceptions: IE and Opera; will be coming in IE 10 and Opera 12 respectively).

只有可行的替代方法是 JSONP (使用

Only viable alternatives are JSONP (using JsonpRequestBuilder in GWT) or a "proxy" on the same server serving your GWT app.

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