How to download a file through a url

Copy out , resp. The good news is you can do the same in Go and rather simply too. Mock S3 Uploads in Go Tests — Feb 22, A common scenario a back-end web developer might encounter is writing code which uploads a file to an external storage platform, like S3 or Azure. Build a Basic Web Scraper in Go — Oct 26, This is a single page web scraper, it uses the goquery library to parse the html and allow it to be queried easily like jQuery.

There is a Find method we can use to query for classes and ids in same way as a css selector. In our example we use this to get the latest blog titles from golangcode. When the URL linked to a webpage rather than a binary, I had to not download that file and just keep the link as is. To solve this, what I did was inspecting the headers of the URL. Headers usually contain a Content-Type parameter which tells us about the type of data the url is linking to.

A naive way to do it will be -. It works but is not the optimum way to do so as it involves downloading the file for checking the header. 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. Learn more. How to download a file from a URL? Ask Question. Asked 7 years, 8 months ago. Active 11 months ago. Viewed k times. Improve this question. Giacomo Chud37 Chud37 1 1 gold badge 5 5 silver badges 18 18 bronze badges. Can you provide the URL?

Sure, I've got it now, but for testing try this: oizo You can't force your browser to download this. The web link points to a file which contains a built in rendering system which displays the content within the page. If you own the website you can change code to do this, but from your end it would have to be a save as job. It's absolute rubbish that Chrome doesnt have this feature built in. I should just be able say right click in the url bar and click save as, but instead I have to go a stupid long winded way.

I'm still dertermined there's a solution out there. Show 1 more comment. Active Oldest Votes. In Command Line Open your favorite terminal emulator type curl -o myfile. Improve this answer. NonlinearFruit NonlinearFruit 8 8 silver badges 16 16 bronze badges.