Part 3. Debugging CORS requests
The previous two parts of this book focused on how CORS works from both the client’s and the server’s perspective. Because there is both a client- and server-side component to CORS, there are many places where things can go wrong, and debugging these issues can be difficult.
Chapter 7 provides details on how to debug CORS requests. It starts by introducing you to the browser’s developer tools. These developer tools provide a lot of insightful information about CORS requests, including any CORS-related errors, and a view into the request and response headers. If the developer tools aren’t sufficient, the chapter looks at Wireshark, which is a tool that analyzes network traffic. Wireshark can help shed some light ...
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