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Same-origin policy One restriction of AJAX is the same origin policy. It requires that all requests come from the same domain name and subdomain name, and the ports of the addresses must be consistent. The main reason is security considerations: When an Ajax request is sent, all requests are sent together with the cookie information of the primary domain. That is to say, for remote services, if a request co

Introduction to angular. js cross-origin post solution, Introduction to angular. js Cross-origin: problems frequently encountered in front-end development. AngularJS implements cross-origin methods similar to Ajax and uses CORS mechanisms. The following describes how to use $ http in AngularJS to implement cross-origin

A project uses the Canvas label of Html5. The image displayed by canvas comes from the subdomain of api.xx.com. the domain of the current page is m.xx.com. once it is called through JS: canvas. toDataURL () will report the cross-origin issue: Redirectatorigin #039; api. xx. c... A project uses the Canvas label of Html5. The image displayed by canvas comes from the subdomain of api.xx.com. the domain of the current page is m.xx.com. once it is called

Implement cross-origin ajax requests based on iframe to obtain ajax data in webpages. As we all know, ajax requests cannot be sent in different domains. the browser reports the following error: At the same time, the embedded iframe cannot perform cross-domain communication, that is, the iframe of different domains cannot read data from each other (of course, the hash change can be used to pass data from the parent window to the Child iframe, ). When

Case I. Web proxy method (on server) That is, the cross-origin access requests to website B generated when you access website a are submitted to the specified page of website a. The page replaces the user page to complete interaction and return appropriate results. This solution can solve most of the Cross-origin access problems that can be considered at this stage, but requires website A to provide su

Ajax is Asynchronous JavaScript and XML. By performing a small amount of data exchange with the server in the background, AJAX can implement asynchronous updates on webpages. This means that you can update a part of a webpage without reloading the entire webpage.Interaction Process: 1 -- start to get the XMLHTTPRequest object2 -- open the URL channel and set asynchronous transmission3 -- send sends data to the server4 -- the server receives and processes the data, and returns the result after th

Same-origin policy IntroductionIf the protocol, port (if specified), and host name of the two pages are the same, the two pages have the same source. The same-origin policy prevents you from retrieving or setting attributes of documents loaded from one source. This policy can be traced back to Netscape Navigator 2.0. However, in many cases, pages in two different domains need to communicate with each other,

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Label:Ajax cross-domain access is an old problem, a lot of solutions, more commonly used is the Jsonp method, the Jsonp method is an unofficial method, and this method only supports get mode, not as secure as post. Even if you use the Jsonp method of jquery, type is set to post and is automatically changed to get. Official Question Description: "Script": evaluates the response as JavaScript and returns it as plain text. Disables caching by appending a query string parameter, "_=[timestamp]",

Ajax cross-domain access is an old problem, a lot of solutions, more commonly used is the Jsonp method, the Jsonp method is an unofficial method, and this method only supports get mode, not as secure as post. Even if you use the Jsonp method of jquery, type is set to post and is automatically changed to get.Official Question Description:"Script": evaluates the response as JavaScript and returns it as plain text. Disables caching by appending a query string parameter, "_=[timestamp]", to the URL

Combined with the previous commit. If you use different domain names, you will encounter cross-origin requests... Combine the previous http://www.2cto.com/ OS /201511/112841.html, and continue the resources of the separation sites to the different sites If a java site uses a tomcat server, the css, images, and js of the site must be separated. If you use different domain names, you will encounter cross-domain situations. Therefore, apache Proxy is u

Html5 postMessage implements cross-origin message transmission, html5postmessage I. same-origin policy To understand cross-origin, we must first know what the same-origin policy is. In this way, Baidu encyclopedia defines the Same origin policy: the Same

Angular uses CORS to implement cross-origin Solutions In the past, there was a very old article on the Internet, including the keyword "cross-origin summary and solution for Baidu" now, the first few recommendations were "Javascript cross-origin summary and solution ". after reading it, I felt that the method was a little outdated. Some of them were documents. d

JavaScript is a front-end dynamic script technology that is frequently used in Web development. In JavaScript, there is a very important security restriction, called "Same-Origin Policy" (Same-Origin Policy ). This Policy imposes significant limitations on the page content that JavaScript code can access, that is, JavaScript can only access content in the same domain as the document containing it. JavaScrip

Cross-origin issue occurs in get request URLs in AngularJS. angularjsget This morning, I helped my students read an AngularJS issue, mainly because a cross-origin access occurred in the request and the request was blocked. The Code she gave me is as follows: Problems We can see that the URL is accessed through the get method of $ http and cannot be accessed all the time. I printed the specific response to

Based on the actual situation, this article discusses cross-origin Technology in two cases: first, the cross-origin Technology for different subdomains is discussed, and then the cross-origin Technology for completely different domains is discussed. If you need a friend, you can check it carefully. JavaScript is a front-end dynamic script technology that is frequ