Why is my Go web server redirecting POST requests to GET requests?

Go Web Server Automatically Redirecting POST Requests

Issue

When sending a POST request to a specific URL using a web server built with Go, users may encounter an unexpected redirection to a GET request. This issue often occurs when there is a discrepancy between the registered handler path and the requested URL, resulting in a redirect.

Explanation

The default implementation of the http package in Go enforces certain rules regarding URL trailing slashes. If a user registers a handler for a path with a trailing slash / but directs the browser to a URL without the trailing slash, the server automatically sends a 301 redirect response. This ensures that the browser follows the correct URL format and matches the registered handler.

Solution

To resolve this issue, developers can employ several strategies:

• Direct the browser to the correct URL: By directing the browser to the registered handler path, including the trailing slash, the redirect issue can be avoided.
• Register the handler for both paths: One approach is to register the handler for both the path with and without the trailing slash, allowing either URL to be used without triggering a redirect.
• Avoid using trailing slashes in the handler registration: If a specific path without a trailing slash is desired, developers should register the handler accordingly, without the trailing slash.

Considerations

It's important to note that when a redirect occurs, the browser will not repeat the POST data. This is because the browser cannot determine if the user intends to send the same sensitive data to the new URL. Therefore, users should ensure that the correct URL is used when submitting POST requests.

The above is the detailed content of Why is my Go web server redirecting POST requests to GET requests?. For more information, please follow other related articles on the PHP Chinese website!