The New Adventures of GA4: A Reporting Issues Update
July 2023 marked the beginning of a thrilling journey into the world of Google Analytics 4 (GA4). But like any…
When browser standards were first implemented, they included what is known as the same-origin policy, which still holds true today. This policy allows for scripts from the same originating domain to be accessed, but for security reasons it denies cross domain HTTP requests. In order to overcome this, many developers had no choice but to implement what is known as a proxy; however, they are difficult to implement and maintain.
Then along came CORS, which is a W3C specification that has added HTTP header standards to allow for cross domain requests. This makes mobile app web service development much more straight forward. You can implement CORS on just about any framework or language such as Java, PHP, or .NET. If you’re a .NET developer and have had trouble developing cross domain services, look no further than the new ASP.NET Web API 2. It comes included in the .NET framework version 4.5. This library makes it a breeze to implement CORS, so you can focus your time on the services themselves instead of trying to find a work around cross domain restrictions. However, when developing cross domain services you must be cautious. You will need to limit the access of the services to trusted domains and also deny HTTP request types that your services don’t implement. I.e. deny POST & DELETE if they are not required methods for your services. CORS services should never make sensitive data publicly available because of the openness of the CORS architecture.
So if you’re going to be developing apps, at some point your going to have to deal with getting around the same-origin browser policy and the best solution is to implement CORS.
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