Hello! If you have been working with HTTP requests and CORS (Cross-Origin Resource Sharing), you may have encountered the CORSInvalidAllowMethod error. Here, we will simply explain why this error occurs and how we can resolve it.
The nature of HTTP is such that for more security, it does not allow requests between multiple origins (or in other words, Cross-Origin) to be carried out easily. To achieve this type of request, we must use CORS, which grants us the necessary permissions. However, sometimes these permissions are not set correctly, and as a result, we encounter the CORSInvalidAllowMethod error.
This error occurs when your request is being sent to a server that has a method you specified (Method), such as GET or POST, not included in the Access-Control-Allow-Methods header. In other words, the server does not permit this specific method for Cross-Origin access.
Now, the question is how can we resolve this issue? The main solution is to ensure your server responds to the request by sending appropriate headers that allow necessary methods. This is usually accomplished with a backend server or API.
If you are a developer, you may request from the server manager to configure the necessary headers. If you have direct access, familiarize yourself with server settings to ensure that required methods are included in Access-Control-Allow-Methods.
Furthermore, here’s an example of server configurations that can help resolve this issue:
<!-- Server configuration in a specific language (such as Node.js) -->
response.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
Here, each line of code indicates how to include GET, POST, and OPTIONS methods in Access-Control-Allow-Methods.
I hope these explanations help you better understand how to manage the CORSInvalidAllowMethod error and properly send your requests.