Rails - Feb 2007 - How can I open a file via a clickable link.

I am new to RoR,
How can I open a file via a clickable link.
suppose I have a excel file in a folder named "myfiles" in the public
directory.
as example
I have an excel(named as data.xls) file in "myfiles" directory

Now i want to allow the user to open the file by clicking a link in my
page.

How can i do that?
please help me.

Tuhin

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Just make an html link to it, same as you would for any other system.
-Nathan

On 22/02/07, tuhin
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
>
>
> I am new to RoR,
> How can I open a file via a clickable link.
> suppose I have a excel file in a folder named "myfiles" in the
public
> directory.
> as example
> I have an excel(named as data.xls) file in "myfiles" directory
>
> Now i want to allow the user to open the file by clicking a link in my
> page.
>
> How can i do that?
> please help me.
>
> Tuhin
>
> --
> Posted via http://www.ruby-forum.com/.
>
> >
>
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API is your friend.
http://api.rubyonrails.org/classes/ActionController/Streaming.html#M000091
send_file

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Either method will work... the advantage of Ben''s method suggestion is
that
you can have Ruby code which runs each time the file is downloaded, whereas
with my method, the file is just downloaded directly.
-N

On 22/02/07, Ben
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
>
>
> API is your friend.
> http://api.rubyonrails.org/classes/ActionController/Streaming.html#M000091
> send_file
>
> --
> Posted via http://www.ruby-forum.com/.
>
> >
>
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Ben wrote:
> API is your friend.
> http://api.rubyonrails.org/classes/ActionController/Streaming.html#M000091
> send_file
I put this code block in files_controller.rb

  def send_file(path, options = {}) #:doc:
        raise MissingFile, "Cannot read file #{path}" unless 
File.file?(path) and File.readable?(path)

        options[:length]   ||= File.size(path)
        options[:filename] ||= File.basename(path)
        send_file_headers! options

        @performed_render = false

        if options[:stream]
          render :text => Proc.new { |response, output|
            logger.info "Streaming file #{path}" unless logger.nil?
            len = options[:buffer_size] || 4096
            File.open(path, ''rb'') do |file|
              if output.respond_to?(:syswrite)
                begin
                  while true
                    output.syswrite(file.sysread(len))
                  end
                rescue EOFError
                end
              else
                while buf = file.read(len)
                  output.write(buf)
                end
              end
            end
          }
        else
          logger.info "Sending file #{path}" unless logger.nil?
          File.open(path, ''rb'') { |file| render :text =>
file.read }
        end
      end
And add this line in my page
<%= link_to ''file download'', :action =>
''send_file(download_filename)''
%>
where download_filename is a veriable <%= 
download_filename=''/images/myfile.xls''%>

when I click the link, it display error message as
"No action responded to send_file(download_filename)"
Any syntax error in my code?
plz help me as i am new.

Tuhin

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Hold on, no need to copy its source to your controller.

<%= link_to ''Get File'', :action =>
''get_file'', :file =>
download_filename %>

def get_file
     send_file(params[:file])
end

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Ben wrote:
> Hold on, no need to copy its source to your controller.
> 
> <%= link_to ''Get File'', :action =>
''get_file'', :file =>
> download_filename %>
> 
> def get_file
>      send_file(params[:file])
> end
thanks for ur help.

but error is
"Cannot read file myfile.xls"

why? i can not understand.

Tuhin

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you need to specify the correct path.
<% download_filename="#{RAILS_ROOT}/public/files/myfile.xls"%>

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