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The browser makes an Ajax-style request to the server, which is kept open until the server has new data to send to the browser, which is sent to the browser in a complete response. The browser initiates a new long polling request in order to obtain subsequent events.
The utility of these background HTTP requests and asynchronous Web technologies remained fairly obscure until it started appearing in large scale online applications such as Outlook Web Access (2000) [8] and Oddpost (2002). [9] Google made a wide deployment of standards-compliant, cross browser Ajax with Gmail (2004) and Google Maps (2005). [10]
For pages constructed on the fly, the server software may defer requests to separate programs and relay the results to the requesting client (usually, a Web browser that displays the page to the end user). Such programs usually require some additional information to be specified with the request, such as query strings or cookies. Conversely ...
XMLHttpRequest (XHR) is an API in the form of a JavaScript object whose methods transmit HTTP requests from a web browser to a web server. [1] The methods allow a browser-based application to send requests to the server after page loading is complete, and receive information back. [2] XMLHttpRequest is a component of Ajax programming.
The Cache-Control: no-cache HTTP/1.1 header field is also intended for use in requests made by the client. It is a means for the browser to tell the server and any intermediate caches that it wants a fresh version of the resource. The Pragma: no-cache header field, defined in the HTTP/1.0 spec, has the same purpose. It, however, is only defined ...
If your account is working on a web browser and you made sure you're using the right server settings, then update your email app to the newest version available. If you're still experiencing issues with your app, contact the manufacturer. Also, access your AOL Mail on a web browser. Keep in mind - For two-step verification, generate an app ...
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