In this structure, the "attachment" directive tells the browser not to display the file inline. The "filename" parameter suggests the name the file should have when saved to the user's local disk. Without this header, the browser usually defaults to the last segment of the URL path, which can often be a confusing string of IDs or hashes.
The standard format for the header is:Content-Disposition: attachment; filename="example.pdf" file name download header
I can provide the specific you need for your project. In this structure, the "attachment" directive tells the
The Content-Disposition header is the primary tool used by web developers to control how a browser handles a file download. By default, browsers try to display files like PDFs, images, or text files directly in the window. When you want to force the browser to download the file instead and give it a specific name, you must configure this header correctly. When you want to force the browser to
Handling special characters and non-ASCII names requires an extended syntax defined in RFC 6266. Modern browsers look for the "filename*" parameter, which allows for UTF-8 encoding. This prevents filenames with accents, spaces, or symbols from breaking or appearing as "garbage" text. A robust implementation often includes both parameters for maximum compatibility:Content-Disposition: attachment; filename="manual.pdf"; filename*=UTF-8''manual%20guide.pdf
Security is a critical consideration when dynamic filenames are involved. You must sanitize user-inputted filenames to prevent directory traversal attacks. An attacker might try to use "../" sequences to overwrite sensitive system files. Always strip path information and validate the file extension before serving the download.