How does XMLHttpRequest work in modern browsers?
XMLHttpRequest cross-site. Modern browsers support cross-site requests by implementing the Cross-Origin Resource Sharing (CORS) standard. As long as the server is configured to allow requests from the origin of your web application, XMLHttpRequest will work. Otherwise, an INVALID_ACCESS_ERR exception is thrown.
Table of Contents
How to send HTTP request using XmlHTTPRequestObject?
To send an HTTP request, create an XMLHttpRequest object, open a URL, and send the request. After the transaction completes, the object will contain useful information, such as the response body and the HTTP status of the result.
How to use Cross Site Tracking (XST) attack?
1. Description. A Cross-Site Tracing (XST) attack involves the use of Cross-Site Scripting (XSS) and the TRACE or TRACK HTTP methods. 2 Risk Factors 3 Examples. An example using cURL from the command line to send a TRACE request to a web server on localhost with TRACE enabled. 4 Remediation. 5 References
Is the XMLHttpRequest process handled asynchronously or synchronously?
If this argument is true or not specified, the XMLHttpRequest is processed asynchronously; otherwise, the process is handled synchronously. You can find a detailed discussion and demos of these two types of requests on the Synchronous and Asynchronous Requests page.
What is the optional argument in XMLHttpRequest?
The request type is dictated by the optional async argument (the third argument) that is set in the XMLHttpRequest.open() method. If this argument is true or not specified, the XMLHttpRequest is processed asynchronously; otherwise, the process is managed synchronously.
Why is XMLHttpRequest not used in Safari 4?
XMLHttpRequest is used in many Ajax libraries, but until the release of browsers like Firefox 3.5 and Safari 4 it could only be used within the framework of the same-origin policy for JavaScript. This meant that a web application using XMLHttpRequest could only make HTTP requests to the domain it was loaded from, and not to other domains.