sinatra application with file_uploader

app.rb

require 'rubygems'
require 'haml'
require 'sinatra'
require 'sinatra/flash'
require 'file_uploader'

enable :sessions

get '/' do
  haml :index
end

post '/upload' do
  FileUploader.create.save(params[:file]) do |path|
    flash[:upload] = "#{path} is saved."
  end

  redirect '/'
end

__END__

@@ layout
%html
  %head
    %title File Uploader
  %body
    = yield
    
@@ index
%h1 File Uploader

- if flash[:upload]
  %div{:style => 'color:green'}= flash[:upload]

%form{:action => '/upload', :method => 'post', :enctype => 'multipart/form-data'}
  %label{:for => 'file'} Select file:
  %input{:type => 'file', :id => 'file', :name => 'file'}
  %input{:type => 'submit', :value => 'Upload'}

You should mention that path is actually a File object and not just a String with a path in it. In Sinatra you might want to just have the filename as you don't access /public/upload/filenmae. You want to use /upload/filename So if you want to access a newly created file you want ot use "/upload/#{path.basename}". Took me a while to look through all the classes to make sure this works.

I actually return path of the uploaded file as String not a File object

This is strange. Uploads are not complete. I tried with several images and always the last couple of bytes are missing. i.e. in a picture the lower right corner is missing. Is this a problem with the buffered stream? I use sinatra 1.2.1 and thin 1.2.10

Last broken bytes problem is fixed on v0.2.1.