What does request filename return

Most browsers will propose to save it under the cool. Header type Response header for the main body , Request header , Response header for a subpart of a multipart body Forbidden header name no.

Previously, the first matching parameter would be used, thereby preventing a more appropriate name from being used. See bug Response header for the main body , Request header , Response header for a subpart of a multipart body.

To declare File bodies, you need to use File , because otherwise the parameters would be interpreted as query parameters or body JSON parameters. If you declare the type of your path operation function parameter as bytes , FastAPI will read the file for you and you will receive the contents as bytes. Have in mind that this means that the whole contents will be stored in memory.

This will work well for small files. UploadFile has the following async methods. Next the functions that check if an extension is valid and that uploads the file and redirects the user to the URL for the uploaded file:. This is also true for the filename of an uploaded file. All submitted form data can be forged, and filenames can be dangerous.

For the moment just remember: always use that function to secure a filename before storing it directly on the filesystem. So just imagine someone would send the following information as filename to your application:.

Assuming the number of.. This does require some knowledge about how the application looks like, but trust me, hackers are patient :. Any pointers for resolving this gratefully received Improve this question. Paul Dixon. Paul Dixon Paul Dixon 1, 3 3 gold badges 20 20 silver badges 35 35 bronze badges. Add a comment. Active Oldest Votes. Improve this answer. MrWhite I know, hence my confusion. I think it might because I've done this before via. MrWhite MrWhite