jsonp

Read continuous feed from CouchDB using Ajax/jQuery

由 旧巷老猫 提交于 2020-01-13 02:10:22
问题 I want to listen for continuous changes from CouchDB using jQuery - now this works: http://localhost:5984/testdb/_changes?feed=continuous which means that I get a new line of json every time there is a db update - but how do I read updates off this URL using jQuery? I tried using this but it doesn't work: $.ajax( { url : "http://localhost:5984/testdb/_changes?feed=continuous&callback=?", dataType : 'json', success : function(data) { alert(data.results.length); } }); Edit : $.ajax calls the

Read continuous feed from CouchDB using Ajax/jQuery

由 徘徊边缘 提交于 2020-01-13 02:10:13
问题 I want to listen for continuous changes from CouchDB using jQuery - now this works: http://localhost:5984/testdb/_changes?feed=continuous which means that I get a new line of json every time there is a db update - but how do I read updates off this URL using jQuery? I tried using this but it doesn't work: $.ajax( { url : "http://localhost:5984/testdb/_changes?feed=continuous&callback=?", dataType : 'json', success : function(data) { alert(data.results.length); } }); Edit : $.ajax calls the

$.ajax()方法详解

由 只谈情不闲聊 提交于 2020-01-12 15:59:58
$.ajax()方法详解 1.url : 要求为String类型的参数，（默认为当前页地址）发送请求的地址。 2.type : 要求为String类型的参数，请求方式（post或get）默认为get。注意其他http请求方法，例如put和delete也可以使用，但仅部分浏览器支持。 3.timeout : 要求为Number类型的参数，设置请求超时时间（毫秒）。此设置将覆盖$.ajaxSetup()方法的全局设置。 4.async : 要求为Boolean类型的参数，默认设置为true，所有请求均为异步请求。如果需要发送同步请求，请将此选项设置为false。注意，同步请求将锁住浏览器，用户其他操作必须等待请求完成才可以执行。 5.cache : 要求为Boolean类型的参数，默认为true（当dataType为script时，默认为false），设置为false将不会从浏览器缓存中加载请求信息。 6.data : 要求为Object或String类型的参数，发送到服务器的数据。如果已经不是字符串，将自动转换为字符串格式。get请求中将附加在url后。防止这种自动转换，可以查看　　processData选项。对象必须为key/value格式，例如{foo1:"bar1",foo2:"bar2"}转换为&foo1=bar1&foo2=bar2。如果是数组

jsonp is not firing beforeSend?

由 馋奶兔 提交于 2020-01-12 08:52:58
问题 I am working on a project to call a webservice from different domain using $.ajax with dataType set to jsonp. $.ajax({ type: "GET", url: testService.asmx, async: true, contentType: "application/json; charset=utf-8", dataType: "jsonp", beforeSend: function (XMLHttpRequest) { alert('Before Send'); //Nothing happnes }, success: function (response) { alert('Success'); //this was fired }, complete: function (XMLHttpRequest, textStatus) { alert('After Send'); //this was fired } }); The problem is I

使用JSONP来进行mashup

由 房东的猫 提交于 2020-01-12 03:23:10
什么是JSONP？ JSONP即JSON with Padding。由于同源策略的限制，XmlHttpRequest只允许请求当前源（域名、协议、端口）的资源。如果要进行跨域请求，我们可以通过使用 html的script标记来进行跨域请求，并在响应中返回要执行的script代码，其中可以直接使用JSON传递javascript对象。这种跨域的通讯方式称为JSONP。 使用jQuery $.ajax({ url:'http://api.flickr.com/services/feeds/photos_public.gne?format=json&jsoncallback=?', dataType:'jsonp', success:function(data){ console.log(data); } }); 注意其中的jsoncallback针对不同的服务提供商是变化的。比如推特就是callback~~ 使用Dojo /** * @author xing */ dojo.provide("libs.test"); dojo.require("dojo.io.script"); dojo.io.script.get({ url:'http://api.flickr.com/services/feeds/photos_public.gne', content:{ format:

Why is cross-domain JSONP safe, but cross-domainJSON not?

由 流过昼夜 提交于 2020-01-11 15:48:52
问题 I'm having trouble connecting some dots having recently learned of JSONP. Here's my understanding: Cross-domain XmlHttpRequests for any content (including JSON) is banned, due to the same origin policy. This protects against XSRF. You are permitted to have a script tag with a src that returns JSONP - some JSON padded inside a call to a Javascript function (say 'Foo') You can have some implementation of 'foo' on the page that will get called when the JSONP data is returned, and you can do

Why is cross-domain JSONP safe, but cross-domainJSON not?

由 前提是你 提交于 2020-01-11 15:48:29
问题 I'm having trouble connecting some dots having recently learned of JSONP. Here's my understanding: Cross-domain XmlHttpRequests for any content (including JSON) is banned, due to the same origin policy. This protects against XSRF. You are permitted to have a script tag with a src that returns JSONP - some JSON padded inside a call to a Javascript function (say 'Foo') You can have some implementation of 'foo' on the page that will get called when the JSONP data is returned, and you can do

jQuery, CORS, JSON (without padding) and authentication issues

由 北战南征 提交于 2020-01-11 05:42:11
问题 I have two domains. I'm trying to access a JSON object from one domain through a page on another. I've read everything I could find regarding this issue, and still can't figure this out. The domain serving the JSON has the following settings: Header set Access-Control-Allow-Origin "*" Header set Access-Control-Allow-Methods "GET, OPTIONS" Header set Access-Control-Allow-Headers "origin, authorization, accept" From my other domain, I'm calling the following: $.ajax({ type:'get', beforeSend:

Is there an existing tool for jsonp like fetching of xml in jquery?

由 喜你入骨 提交于 2020-01-10 19:33:54
问题 For a web service I'm developing I would like my embedded code (on the client's site) to fetch an xml file from my sever script which resides on my domain. As this is a cross-domain request I figured to use jsonp as it seems the de facto standard for such apis. However, for my application it would be easier for me to use xml instead of json. Now, I could of course convert my xml to json on the server and then back again to xml in the client's site javascript, but that seems unnecessarily

How to parse malformed JSONP with hex-encoded characters using JSON.NET?

由 和自甴很熟 提交于 2020-01-10 05:23:28
问题 I make a call to google's dictionary api like this: var json = new WebClient().DownloadString(string.Format(@"http://www.google.com/dictionary/json?callback=dict_api.callbacks.id100&q={0}&sl=en&tl=en", "bar")); However I get a response that this code fails to parse correctly: json = json.Replace("dict_api.callbacks.id100(", "").Replace(",200,null)", ""); JObject o = JObject.Parse(json); The parse dies at encountering this: "entries":[{"type":"example","terms":[{"type":"text","text":"\x3cem
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