Flask file download with last_modified






















This is quite a common requirement for webapps nowadays. Some examples are :. We will be creating back-end to remove watermark from pdf files. For that we need to get user file, process remove watermark from pdf file and provide processed file to user for download. We will create a simple HTML page that provides a button to select file and another button to upload that file. Let the HTML page be index. Now we render this page as the main page i. We need to specify a directory to the Flask app where the uploaded files would be stored.

Above line creates a uploads folder in the same directory where the src code of the site is stored. We should also check for file extension that the user is uploading as there would be some specific type of file that the site can process. Latest version Released: Jun 30, Add query parameters to static file paths.

Navigation Project description Release history Download files. Project links Homepage. Maintainers bmcculley. Project description Project details Release history Download files Project description Flask Autoversion Automatically version static file paths. Project details Project links Homepage. Download files Download the file for your platform. Files for Flask-Autoversion, version 0. You could of course omit it and ask the user to provide the file extension too.

You may want a nested directory structure within your trusted base directory, where users can provide a path to a file in the URL to retrieve a file. Let's say reports is our trusted base directory, containing several sub-directories and files, like so:. Without using a database, we can create a dynamic system of URL's and allow users to provide a path to a file. Let's create a new route and put this into practice, allowing our user to download a report by providing a path in the URL. We're doing exactly the same as above, with the exception of adding the path prefix to the URL variable.

The path should be relative from the reports directory saved in our app. Likewise any non-existent filenames would throw a error. The reason? I'm sure you wouldn't want users to be able to downlaod any file from your application at their own will. Read more about sending files in Flask over at the official documentation, linked here. Drop the app. Using the sass, rcssmin and rjsmin Python packages to optimize web assets, including Bootstrap. Using Python decorators to add another layer of functionality to Flask routes.



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