It will be destroyed as soonĪs it is closed (including an implicit close when the object is garbageĬollected). The file is created securely, using the same rules as mkstemp(). Return a file-like object that can be used as a temporary storage area. TemporaryFile ( mode = 'w+b', buffering = - 1, encoding = None, newline = None, suffix = None, prefix = None, dir = None, *, errors = None ) ¶ The module defines the following user-callable items: tempfile. Is recommended to use keyword arguments for clarity. To maintain backward compatibility, the argument order is somewhat odd it Random characters which allows those files to be securely created in Files names used by this module include a string of
#Python download a file manual
Mkdtemp() are lower-level functions which require manual cleanup.Īll the user-callable functions and constructors take additional arguments whichĪllow direct control over the location and name of temporary files andĭirectories. Interfaces which provide automatic cleanup and can be used as TemporaryDirectory, and SpooledTemporaryFile are high-level This module creates temporary files and directories. Hitting the URL will show you a page similar to the below image:Ĭlicking on the download link will ask you to save the file according to your chosen location.Tempfile - Generate temporary files and directories ¶ If you want to change the port then you can change the line app.run() to app.run(port=50001), where 5001 is the new port. Now navigate to the project root directory from command line tool and execute the command python main.py or simply main.py if your Python is available on class path, your server will start on default port 5000.
Notice in the above template file I am using Flask EL (Expression language) to evaluate the link endpoint. templates directory is the standard directory structure of Flask based web application for putting templates or HTMLs or any static resources – js, css, images. Now create a download.html file and put it under templates directory. I hope this example will work with other file types as well. As you see I have tested with four types of files. The endpoint /download is called on clinking upon the link on UI and a file is sent to the client or UI. Clicking on the link will ask user to save the file in a chosen location. This UI contains only one link for downloading a file from the server. In the above source code, the root path or endpoint will simply render the UI. Return send_file(path, as_attachment=True) from app import appįrom flask import Flask, send_file, upload_form(): Next I will create main.py script that will define all URIs or Action paths for performing certain operations such as rendering the UI and downloading the file from server. This file should be created under the project root directory. Configuring FlaskĬreate the below app.py script (py is the extension to indicate Python script) where I import the flask module. I may not mention the project root directory in subsequent sections while creating new files and I will assume that I am talking with respect to the project’s root directory. Let’s say I am going to create a project root directory python-flask-file-download. Project Directoryįirst step is to create a project root directory under which I will put all the required files for the project. Now I will create the web application that will download any kind of file which is kept in a server location. The reason could be, you want to generate reports from database and download these reports.
There could be any reason to download a file from server.
The downloaded file will ask you to choose a file location for saving it. In this example there will be a simple UI (user Interface), where a link will be provided to the end users and clicking on the download link a file will be download. The file could be of any type of file, i.e., pdf, text, excel, word etc. I will download the file which is kept in the server location.
#Python download a file how to
Here I am going to show a simple example on how to download a file from web application using Python Flask.