How to Send Files in Rails
May 19th, 2006
Setting up a link in your Rails app to allow your users to download any file is incredibly easy. Not just
incredibly easy - OMGWTHBBQ easy! Stuff like this makes Rails so cool!
First, put the file out on your server. I put my "README.txt" file in a "files" folder like this: "rails/ appname/files/README.txt."
Next, set up a link in one of your pages:
Finally, add the "get_readme" action method to your controller:
That's it! Now, whenever a user clicks the "Get Readme" link on your page, the file will be sent to the
client. The :filename option simply allows you to suggest a name for the file to your users. I threw it in
just to see how it works. I couldn't believe it was this easy, but sure enough, it is. Very cool.
There are other options like the :filename option which allow you to tell the browser what type of file to expect, how to display the file, and whether or not to stream the download. Streaming is turned on by default and allows downloading of very large files. All of these options go into the same line of code. Take a look at the article at this link.
As usual, expect a quick video demonstration of this posted later tonight.
First, put the file out on your server. I put my "README.txt" file in a "files" folder like this: "rails/ appname/files/README.txt."
Next, set up a link in one of your pages:
1 2 |
<%= link_to 'Get Readme', :action => 'get_readme' %> |
1 2 3 4 |
def get_readme send_file("files/README.txt", :filename => 'yo_readme.txt') end |
There are other options like the :filename option which allow you to tell the browser what type of file to expect, how to display the file, and whether or not to stream the download. Streaming is turned on by default and allows downloading of very large files. All of these options go into the same line of code. Take a look at the article at this link.
As usual, expect a quick video demonstration of this posted later tonight.
June 10th, 2007 at 07:21 PM I have been looking up this very same thing myself (a bit of a supernoob, myself!). I am coming from an IIS background and curisous how to make sure someone cant just type in an URL to get to this file?
June 10th, 2007 at 07:21 PM I'm not sure peri. I'm guessing that this method doesn't obscure the URL so that someone can't just get it that way. There's probably some other way to do that.
October 31st, 2007 at 03:19 PM
to answer your question about securing the file, you will need to install an authentication system like acts_as_authenticated, and protect the controller (or your entire application) with a login system. this is pretty straightforward to setup. you might be able to configure your webserver, i.e. apache, lighttpd, etc. to do the authentication but this is messy. hope that helps.
March 26th, 2008 at 03:13 AM
can i do the two things at a time means i want to use send_file function and at the same time after download the file how should i redirect to some another page. and how should i know that the file is actually downloaded. could you tell me please
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