jsonp

文章分享： 详解JS跨域问题 HTTP access control (CORS) html5 postMessage解决跨域、跨窗口消息传递 跨域与跨域访问 一、什么是跨域？ 概念：只要 协议 、 域名 、 端口 有任何一个不同，都被当作是不同的域。 二、为什么浏览器要限制跨域访问呢？ 原因就是安全问题：如果一个网页可以随意地访问另外一个网站的资源，那么就有可能在客户完全不知情的情况下出现安全问题。 三、跨域的常用方法 1. 跨域资源共享（CORS） 服务器端对于CORS的支持，主要就是通过设置 Access-Control-Allow-Origin 来进行的 2. JSONP 什么是jsonp？维基百科的定义是：JSONP（JSON with Padding） JSONP由两部分组成： 回调函数 和 数据 。回调函数是当响应到来时应该在页面中调用的函数，而数据就是传入回调函数中的JSON数据。 JSONP实现原理 ：在js中，我们直接用XMLHttpRequest请求不同域上的数据时是不可以的。但是，在页面上引入不同域上的js脚本文件却是可以的，jsonp正是利用这个特性来实现的。 // jQuery < script type = "text/javascript" > $.getJSON( 'http://example.com/data.php?callback=?

It seems like pretty much every question or explanation I find regarding $http or angularjs in general assumes you can modify the response from your requests. I can't do that and the response I'm getting is malformed (according to the AngularJS parser). It's malformed in a consistent way so I could modify the plain text to fix the problem before parsing it, but both response interceptors and transform response functions occur after the default (content type based?) parsing. Edit: The issue is with the fact that I need to use the JSONP methodology to make a request for information from another

1、js请求后端服务时，域名不同或域名相同端口不同都是 跨域 ； 2、无论哪个浏览器js都不能跨域请求后端服务，解决办法为jsonp；jsonp不是新技术，只是一个解决方案；即js不请求后端服务而是跨域请求js，即跨域加载js文件， 而这个js文件由服务器端返回 。 3、js中可以在cookie中取出token 4、js跨域取数据时，即使数据返回来，但浏览器判断是跨域取的数据也不会让js拿到，自动屏蔽掉 5、jsonp原理图： 上图解释： 情况1--直接请求： 当localhost:8082 服务器js文件Ajax跨域请求时，localhost:8088处理数据正常返回json数据，返回到浏览器时被屏蔽掉，即localhost:8082上不能显示请求的信息 情况2--直接请求带参数callback==mycall： 当localhost:8082 服务器js文件Ajax跨域请求时，在js中Ajax请求代码中配置上daType:jsonp【 jQuery已对jsonp进行了封装，请求时在自己编写的ajax请求链接后面自动携带参数callback=mycall 。 此请求相当于src请求，请求一个远程的js文件，这个远程的文件中包含了服务器端返回的数据，格式为mycall(data)。 jQuery在本地js文件中创建函数mycall(data)

This question already has an answer here: What are the differences between JSON and JSONP? 8 answers I already have a .json object in a server. It is correct and has no syntax errors (valid json). I want to call this object through JSONP because it resides in a server different from my app's. I think I understand how to achieve it client-wise, but I have no idea what to do in relation to the server part. I am having errors all the time when following the info already on the web. Any help? JSONP is basically a "hack" to allow sites to load data and ignore the same-origin policy . It works by

I'm wondering what the header mentioned above is. It's included in the response when I do JSONP calls to Facebook, or even when I simply access http://static.ak.fbcdn.net/ I haven't found any documentation on facebook, e.g. on https://developers.facebook.com/docs/reference/ads-api/etags-reference/ So, hope somebody can help me. thx! To me, this seems to be a request tracking id, so that Facebook can find and trace an specific request details [faster] when you fill in a bug report. Have seen them in lots of bug reports on their bug tracker. A little late, but just to add more information that I

I'm trying to call external site webmethod, and post some data. I tried a lot of different ways and still cannot get the method to be called. Here is my js code: $.ajax({ url: "http://sitename.com/methods.aspx/mywebmethod", data: "{'id':'" + 4 + "'}", dataType: "jsonp", type: "GET", contentType: "application/json; charset=utf-8", success: function (data) { alert(data); }, error: function (XMLHttpRequest, textStatus, errorThrown) { alert(errorThrown); } }); Here is my webmethod code: [WebMethod()] public static bool mywebmethod(int id) { if(id != 0){ return true;} else{return false;} } and I

i'm trying to build a Power Rankings app with the help of Challonge Api, but it seems the JS just keep sending me errors when i retrieve the json. Test Site $(document).ready(function(){ $.ajax({ url: 'https://api.challonge.com/v1/tournaments/3j91s6g1/matches.json', type: 'GET', dataType: "jsonp", success: function (data) { // FOR TEST PURPOSE $.each(data, function(index, element) { $('body').append($('<div>', { text: element.name })); }); }, error : function(error){ console.log(error) } }); }); Any ideas? I was searching around for stuff about the Challonge API and happened upon this question

I'm trying to get a cross domain call to work using JSONP within JQuery. In IE, the alert method never executed. In FF/Safari/Chrome, it's always null. I looked at Fiddler and the result from the WCF method is as I'm expecting, which is: method({"Name":"blah1","Data":"blah2"}); Here's my JavaScript: $.getJSON("http://localhost:5603/MyService/?method=test", null, function (result) { alert("in test: " + result); $("#spText").html(result); }); Here's the WCF method: [OperationContract] [WebInvoke(UriTemplate = "", Method = "GET", BodyStyle=WebMessageBodyStyle.Bare, ResponseFormat =

react获取服务器APi接口的数据： react中没有提供专门的请求数据的模块。但是我们可以使用任何第三方请求数据模块实现请求数据 一、axios 获取Api数据 使用文档： https://www.npmjs.com/package/axios git项目地址： https://github.com/axios/axios axios的作者觉得jsonp不太友好，推荐用CORS方式更为干净（后端运行跨域） npm官网：https://www.npmjs.com，在其搜索：axios即可看到详细说明。接下来cmd运行： 1、安装axios模块 npm install axios --save / cnpm install axios --save (--save必加，表示把模块写入配置文件，否则别人无法运行；建议用cnpm 前者容易失败) 2、在哪里使用就在哪里引入 import axios from 'axios' 3、看文档使用 【调用api关键代码】： var api='http://www.phonegap100.com/appapi.php?a=getPortalList&catid=20'; axios.get(api) .then(function (response) { console.log(response); }) .catch(function