What causes the 404 bad request in my Django application when utilizing MediaStreamRecorder.js to send a blob to the server?

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There are several possible causes of a 404 bad request error in a Django application when using MediaStreamRecorder.js to send a blob to the server. Here are some possible reasons:

1. Incorrect URL: Check that the URL to which the blob is being sent is correct and corresponds to an existing view in your Django application. Make sure that the URL is properly configured and registered in your urls.py file.

2. CSRF token missing or invalid: Django's built-in CSRF protection requires a valid CSRF token to be included in the POST request. Make sure that your JavaScript code includes the CSRF token in the HTTP headers or in the POST data.

3. Permission denied: If the view or endpoint receiving the blob requires certain permissions, make sure that the user making the request has the necessary permissions to access it.

4. Unsupported HTTP method: Make sure that the HTTP method used to send the blob is supported by the view or endpoint in your Django application. Check that the view has the @csrf_exempt decorator if you are using a non-standard method.

5. Server configuration issues: Check that the server hosting your Django application is properly configured to handle POST requests and that there are no firewall or network issues preventing the request from being delivered.