xmlhttprequest | 易学教程

GET request working on postman but not in browser

阅读更多关于 GET request working on postman but not in browser

问题 I have encountered a strange issue with a GET request that I am stuck on. I am calling a GET request from my ASP.Net application that works fine in postman but does not hit my userGETReq.onload. function getUser(username){ userGETReq.open("GET", userURL + "/" + username); userGETReq.send(); userGETReq.onload = () => {if(userGETReq.status === 200){//cool stuff }} I am running on a localhost in the browser - the function to start this is being called from a form that returns false. <form

JS AJAX

阅读更多关于 JS AJAX

1. ajax与XMLHttpRequest 什么是XMLHttpRequest 一种支持异步请求的技术，是ajax的核心 XMLHttpRequest的作用向服务器提出请求并处理响应而不阻塞用户可以在页面加载后进行局部页面更新如何使用ajax 创建XMLHttpRequest异步调用对象创建一个新的HTTP请求，并指定该HTTP请求的方法URL 设置响应HTTP请求状态变化的函数 2. XMLHttpRequest对象简单版本 var xmlhttp ; if ( window . XMLHttpRequest ) { xmlhttp = new XMLHttpRequest ( ) ; } else { xmlhttp = new ActiveXObject ( 'Microsoft.XMLHTTP' ) ; } 全面版本 function createXHR ( ) { if ( typeof XMLHttpRequest != "undefined" ) { return new XMLHttpRequest ( ) ; } else if ( typeof ActiveXObject != "undefined" ) { var xhrArr = [ 'Microsoft.XMLHTTP' , 'MSXML2.XMLHTTP.6.0' , 'MSXML2

CORS 'Allow-Credentials' Nodejs/Express

阅读更多关于 CORS 'Allow-Credentials' Nodejs/Express

问题 My project is running on Node with an Express backend. I'm trying to query my Arango database clientside with Arangojs. ArangoDB is running on Docker on Digital Ocean. I have no issues querying my database serverside, however I get the following error on page load: Failed to load http://0.0.0.0:8529/_db/database/_api/cursor: Response to preflight request doesn't pass access control check: The value of the 'Access-Control-Allow-Credentials' header in the response is 'false' which must be 'true

No 'Access-Control-Allow-Origin' header is present. XmlHttpRequest

阅读更多关于 No 'Access-Control-Allow-Origin' header is present. XmlHttpRequest

问题 I got XmlHttpRequest object, and i'am trying to send long html data string to Asp Net Core, to make out of it content PDF file. But still getting CORS policies. Even-though i have "Access-Control-Allow-Origin" in my header, it still an issue for me. Already tried everything with CORS. Installed cors for Asp net Core, nothing changed. Everything works fine if i use my HTML document from local. Full error: Access to XMLHttpRequest at 'https://.../getInfoWindowPdf?' from origin 'https://...' has

Ajax

阅读更多关于 Ajax

一、简介 “Ajax”这个名字是在2005年2月，Adaptive Path的Jesse James Garrett在他的文章Ajax:A New Approach to Web Application中创造。而Ajax这项技术，是Google在Google Labs发布Google Maps和Google Suggest后真正为人所认识。 Ajax被认为是(Asynchronous JavaScript and XML的缩写）。现在，允许浏览器与服务器通信而无须刷新当前页面的技术都被叫做Ajax. Ajax：一种不用刷新整个页面便可与服务器通讯的办法。不用刷新整个页面便可与服务器通讯的办法： Flash Java applet 框架：如果使用一组框架构造了一个网页，可以只更新其中一个框架，而不必惊动整个页面隐藏的iframe XMLHttpRequest：该对象是对 JavaScript 的一个扩展，可使网页与服务器进行通信。是创建 Ajax 应用的最佳选择。实际上通常把 Ajax 当成 XMLHttpRequest 对象的代名词 Ajax并不是一项新技术，它实际上是几种技术，每种技术各尽其职，以一种全新的方式聚合在一起服务器端语言：服务器需要具备向浏览器发送特定信息的能力。Ajax与服务器端语言无关。 XML (eXtensible Markup Language

Using gettext with Javascript from PHP via XMLHttpRequest

阅读更多关于 Using gettext with Javascript from PHP via XMLHttpRequest

问题 I have an application mainly written in PHP. The translations are done using gettext(). There is a small JavaScript part which also contains strings to be translated. I wrote this simple but working method using XMLHttpRequest: function gettext(string_to_translate) { var filename = get_php_script_folder() + 'gettext.php?string_to_translate=' + string_to_translate; var xmlhttp = new XMLHttpRequest(); xmlhttp.open("GET", filename, false); xmlhttp.send(); if (xmlhttp.status === 200) { var

Using gettext with Javascript from PHP via XMLHttpRequest

阅读更多关于 Using gettext with Javascript from PHP via XMLHttpRequest

AJAX技术中XMLHttpRequest对象学习笔记

阅读更多关于 AJAX技术中XMLHttpRequest对象学习笔记

在AJAX使用的技术中，最核心的技术就是XMLHttpRequest,它是一个人具有应用程序接口的JavaScript对象，能够使用超文本传输协议（http）连接一台服务器。XML的英文释义是可扩展标记语言，它提供了用于描述结构化数据的格式，适用于不同应用程序之间的数据交换。XMLHttpRequest的数据通常采用XML格式。 1.XML 文档结构如下图所示是一个简单的XML文档：在上面的XML文档代码中，第一行是XML声明。其中为根元素，其它的都是该元素的子元素。 2.XML语法要求 1.XML文档必须有一个顶层元素，其它元素必须嵌入顶层元素中 2.每个元素必须有结束标签 3.区分大小写 4.元素可以包含属性，但是属性值必须用单引号或双引号括起来。在一个元素节点中，属性名不能重复。 XML的注释 XML中的注释结构为，是对文档结构内容的解释说明。该部分不属于XML文档内容，所以XML解释器不会处理该内容。, 来源： CSDN 作者： Tony_20 链接： https://blog.csdn.net/Tony_20/article/details/104142233

AJAX request progress percentage log

阅读更多关于 AJAX request progress percentage log

问题 I read content from http://www.dave-bond.com/blog/2010/01/JQuery-ajax-progress-HMTL5/ and i try make that ajax progress bar on my own site, but in console i have only xhr response when php script is full completed. My part of JS code: $('#userSaveData').on('click', function(e){ e.preventDefault(); var $form = $(this).closest('form'); var route = $form.attr('action'); var form_data = $form.serializeObject(); $.ajax({ xhr: function() { var xhr = new window.XMLHttpRequest(); //Upload progress

AngularJS: How to execute a controller function AFTER completion of AJAX call in a service?

阅读更多关于 AngularJS: How to execute a controller function AFTER completion of AJAX call in a service?

问题 Here's my code in the service. this.loginUser = function(checkUser) { Parse.User.logIn(checkUser.username, checkUser.password, { success: function(user) { $rootScope.$apply(function (){ $rootScope.currentUser = user; }); } }); }; Here's my code in the controller: $scope.logIn = function(){ authenticationService.loginUser($scope.checkUser); console.log($scope.currentUser) }; So, what I want to do is, execute some code AFTER the completion of AJAX call, whose success function sets the value of

订阅 xmlhttprequest