@gaozhengzhou Hello! I'm here to help you with any bugs, questions, or contributions. Let's tackle this issue together!

There are similar issues and discussions related to the problem of not being able to obtain a URL when uploading a local file in a self-hosted Dify setup:

1. Closed Issue: Unable to retrieve url from file - This issue was resolved by a pull request that fixed the error of being unable to retrieve the URL from a file.

2. Closed Issue: Unable to read the URL variable from the file - The solution involved ensuring that environment variables are correctly loaded from the .env file or set directly in the docker-compose.yaml file. It's important to verify that these files are correctly set up and that the DifyConfig is properly loading them.

3. Closed Issue: file not found error when upload file - The solution was to set the STORAGE_TYPE to local and ensure the STORAGE_LOCAL_PATH is properly defined and mounted. This involves configuring the Docker setup to mount the storage directory correctly and ensuring appropriate permissions and ownership settings.

You might want to check if your environment variables and Docker configurations are set up as described in these solutions. This could help resolve the issue of not being able to obtain a URL for locally uploaded files ^[1][2][3].

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Duplicated #9567
I've pinned this issue.