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TROUBLESHOOTING.md

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Troubleshooting for Muxer

This troubleshooting outline provides solutions to common issues and errors that you may encounter when using the Muxer package. If you're experiencing difficulties or unexpected behavior, follow the steps outlined below to identify and resolve the problem.

Table of Contents

  1. Missing Route Registration
  2. Route Not Found
  3. Incorrect Request Method
  4. Parameter Extraction Failure
  5. Middleware Execution Order
  6. CORS Headers Not Set
  7. Gzip Compression Not Applied
  8. Recovery from Panic Not Working

1. Missing Route Registration

Problem

You're unable to access a specific endpoint or receive a "404 Not Found" error for a registered route.

Solution

Make sure you have registered the route using the Handle or HandleFunc methods of the Router instance. Check the following:

  • Verify that the route is registered with the correct HTTP method (GET, POST, etc.).
  • Ensure that the path pattern used in the route registration matches the requested URL path.
  • Double-check that the router instance is correctly created and used as the HTTP handler in your application.

2. Route Not Found

Problem

All requests to your application result in a "404 Not Found" error, even though routes are registered correctly.

Solution

Check the following:

  • Ensure that the ServeHTTP method of your Router instance is correctly implemented and used as the HTTP handler for incoming requests. It should be called by the http.ListenAndServe function.
  • Verify that the registered routes have the correct HTTP method and path patterns.
  • If your application is using subrouters, ensure that they are correctly created and used.

3. Incorrect Request Method

Problem

Requests to your application return a "405 Method Not Allowed" error, even though the request method is correct.

Solution

Check the following:

  • Make sure that the registered route has the correct HTTP method specified.
  • Verify that the incoming request has the same HTTP method as the registered route. The comparison is case-sensitive, so ensure they match exactly (e.g.,GET vs. get).

4. Parameter Extraction Failure

Problem

The parameters extracted from the URL path using the Params method of the Router instance are not populated correctly.

Solution

Review the following:

  • Ensure that the route registration pattern contains the named parameters using the :paramName syntax.
  • Verify that the parameter names in the route registration pattern match the names used in the handler function or middleware.
  • Check that the Params method is called with the correct *http.Request instance.

5. Middleware Execution Order

Problem

The execution order of middleware functions is not as expected, leading to incorrect behavior or missing functionality.

Solution

Check the following:

  • Make sure the middleware functions are registered using the Use method of the Router instance in the correct order. Middleware functions are executed in the order they are registered.
  • Verify that the middleware functions are applied to the correct router instance. If you're using subrouters, ensure that the middleware is registered on the appropriate router.

6. CORS Headers Not Set

Problem

Cross-Origin Resource Sharing (CORS) headers are not set in the HTTP response, causing cross-origin requests to fail.

Solution

Review the following:

  • Ensure that the CORS middleware is correctly registered using the Use method of the Router instance.
  • If you need to customize the CORS options, pass the appropriate CORSOption values when creating the CORS middleware.
  • Check that the CORS middleware is registered before the routes that require CORS headers.

7. Gzip Compression Not Applied

Problem

The response body is not compressed using Gzip encoding, even though the Gzip middleware is registered.

Solution

Check the following:

  • Make sure the Gzip middleware is correctly registered using the Use method of the Router instance.
  • Ensure that the Gzip middleware is registered before the routes that require compression.
  • Verify that the client supports Gzip encoding by sending an Accept-Encoding header with a value that includes gzip.

8. Recovery from Panic Not Working

Problem

Your application panics, but the RecoveryHandler middleware doesn't recover from the panic or log any error messages.

Solution

Check the following:

  • Ensure that the RecoveryHandler middleware is correctly registered using the Use method of the Router instance.
  • Make sure that the RecoveryHandler middleware is registered before the routes that may cause panics.
  • If you're providing a custom logger, ensure that it implements the necessary logging functionality.

If the above steps don't resolve the issue, consider examining the application's error logs and adding additional logging statements to identify the cause of the panic.