How to safely and efficiently obtain the local file path when a browser uploads large files?

Uploading large files by browsers: Challenges and solutions for securely obtaining file paths

When uploading large files, how to obtain local file paths safely and efficiently is a problem faced by many developers. Modern browsers such as Chrome and Firefox have disabled APIs that directly get local file paths for security reasons. This article will explore safe and reliable methods to solve this problem.

There is a serious security risk to obtaining the local file path directly, and browser manufacturers will not provide such APIs. The solution proposed in the article to obtain the path directly through the browser is not feasible. For example, modifying the Chromium source code is extremely risky and impractical.

Therefore, two alternatives are recommended in this article:

Solution 1: Use ElectronJS to build desktop applications

ElectronJS allows integration of Node.js into desktop applications, thereby obtaining local file paths using Node.js' file system API. This solution is feasible, but the developer requires the development experience of ElectronJS and Node.js and bear certain development costs.

Solution 2: Backend service scans local files

This is a more recommended solution. The backend service scans the local file and returns the file list for users to choose. After the user selects, the file name is passed to the backend. This solution does not require modifying the browser or building desktop applications, which is low in implementation and high in security. Just add file scanning function to the backend, display the file list on the frontend, and submit the file name after the user selects it to complete the file upload.

Which option to choose depends on project requirements and development capabilities. If you pursue the most efficient solution and have the corresponding development capabilities, ElectronJS is a feasible choice. If security and development costs are preferred, backend services scanning local files is a better choice.

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