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Category: Technique Introduction
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Introduction to Cross-Domain Ajax
Abstract: AFAIK, the cross-domain Ajax calls are prohibited on the browser level due to the security reason. What to do if you really need to use the different source for Ajax response? This article is a great overview of the available tips and tricks.
What's this all about? First, lets talk about the problem for a bit. It goes by the name same origin policy, and this explanation from mozilla.org is typical: - The same origin policy prevents document or script loaded from one origin from getting or setting properties of a document from a different origin.
- -- From http://www.mozilla.org/projects/security/components/same-origin.html
This means that it is largely impossible to load scripts from one domain into another. For example, the following are prohibited: - Issuing an XMLHttpRequest() to another domain (a core component of Ajax).
- Accessing or modifying the DOM of a <frame> or <iframe> which has a src attribute with another domain.
- Accessing or modifying another window (or tab) which has a different location.
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