So if the file is large, this will do nothing but waste bandwidth. I looked into the requests documentation and found a better way to do it. That way involved just fetching the headers of a url before actually downloading it. This allows us to skip downloading files which weren't meant to be downloaded.
To restrict download by file size, we can get the filesize from the Content-Length header and then do suitable comparisons. We can parse the url to get the filename. This will be give the filename in some cases correctly. However, there are times when the filename information is not present in the url. In that case, the Content-Disposition header will contain the filename information. Here is how to fetch it.
The url-parsing code in conjuction with the above method to get filename from Content-Disposition header will work for most of the cases. Use them and test the results. These are my 2 cents on downloading files using requests in Python. Let me know of other tricks I might have overlooked.
This article was first posted on my personal blog. Try to change. Martin Prikryl k 46 46 gold badges silver badges bronze badges. Paran Paran 1 2 2 bronze badges. You cannot use os. SFTP path always uses forward slashes , while os.
Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Who owns this outage? Building intelligent escalation chains for modern SRE. Podcast Who is building clouds for the independent developer? Featured on Meta. Now live: A fully responsive profile. Reducing the weight of our footer. Linked Because of this, I wouldn't recommend using it in favor of one of the methods below.
We've included it here due to is popularity in Python 2. Another way to download files in Python is via the urllib2 module. The urlopen method of the urllib2 module returns an object that contains file data.
To read the contents of. Note that in Python 3, urllib2 was merged in to urllib as urllib. Therefore, this script works only in Python 2. The open method accepts two parameters, the path to the local file and the mode in which data will be written.
Here "wb" states that the open method should have permission to write binary data to the given file. Execute the above script and go to your "Downloads" directory. You should see the downloaded pdf document as "cat2.
You can also download files using requests module. The get method of the requests module is used to download the file contents in binary format. You can then use the open method to open a file on your system, just like we did with the previous method, urllib2. In the above script, the open method is used once again to write binary data to local file.
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