first commit

.rbenv-version

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+1.9.2-p290

Gemfile

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+source :rubygems
+
+gem 'rack-raw-upload'
+gem 'sinatra'
+gem "haml"

Gemfile.lock

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+GEM
+  remote: http://rubygems.org/
+  specs:
+    haml (3.1.4)
+    json (1.6.4)
+    rack (1.3.5)
+    rack-protection (1.1.4)
+      rack
+    rack-raw-upload (1.0.11)
+      json
+    sinatra (1.3.1)
+      rack (~> 1.3, >= 1.3.4)
+      rack-protection (~> 1.1, >= 1.1.2)
+      tilt (~> 1.3, >= 1.3.3)
+    tilt (1.3.3)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  haml
+  rack-raw-upload
+  sinatra

config.ru

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+require 'bundler'
+Bundler.require
+require './superupload'
+
+use Rack::RawUpload
+run Sinatra::Application

lib/rack/raw_upload.rb

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+module Rack
+  class RawUpload
+
+    def initialize(app, opts = {})
+      @app = app
+      @paths = opts[:paths]
+      @paths = [@paths] if @paths.kind_of?(String)
+    end
+
+    def call(env)
+      raw_file_post?(env) ? convert_and_pass_on(env) : @app.call(env)
+    end
+
+    def upload_path?(request_path)
+      return true if @paths.nil?
+
+      @paths.any? do |candidate|
+        literal_path_match?(request_path, candidate) || wildcard_path_match?(request_path, candidate)
+      end
+    end
+
+
+    private
+
+    def convert_and_pass_on(env)
+      tempfile = Tempfile.new('raw-upload.')
+      tempfile << env['rack.input'].read
+      tempfile.flush
+      tempfile.rewind
+      fake_file = {
+        :filename => env['HTTP_X_FILE_NAME'],
+        :type => 'application/octet-stream',
+        :tempfile => tempfile,
+      }
+      env['rack.request.form_input'] = env['rack.input']
+      env['rack.request.form_hash'] ||= {}
+      env['rack.request.query_hash'] ||= {}
+      env['rack.request.form_hash']['file'] = fake_file
+      env['rack.request.query_hash']['file'] = fake_file
+      if query_params = env['HTTP_X_QUERY_PARAMS']
+        require 'json'
+        params = JSON.parse(query_params)
+        env['rack.request.form_hash'].merge!(params)
+        env['rack.request.query_hash'].merge!(params)
+      end
+      @app.call(env)
+    end
+
+    def raw_file_post?(env)
+      upload_path?(env['PATH_INFO']) &&
+        env['REQUEST_METHOD'] == 'POST' &&
+        env['CONTENT_TYPE'] == 'application/octet-stream'
+    end
+
+    def literal_path_match?(request_path, candidate)
+      candidate == request_path
+    end
+
+    def wildcard_path_match?(request_path, candidate)
+      return false unless candidate.include?('*')
+      regexp = '^' + candidate.gsub('.', '\.').gsub('*', '[^/]*') + '$'
+      !! (Regexp.new(regexp) =~ request_path)
+    end
+  end
+end

public/superupload.js

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+$(document).ready(function() {
+  document.getElementById('the-file').onchange = function () {
+    var fileInput = document.getElementById('the-file');
+    var file = fileInput.files[0];
+
+    var xhr = new XMLHttpRequest();
+    xhr.upload.addEventListener('loadstart', onloadstartHandler, false);
+    xhr.upload.addEventListener('progress', onprogressHandler, false);
+    xhr.upload.addEventListener('load', onloadHandler, false);
+    xhr.addEventListener('readystatechange', onreadystatechangeHandler, false);
+    xhr.open('POST', '/', true);
+    xhr.setRequestHeader("Content-Type", "application/octet-stream");
+    xhr.setRequestHeader("X-File-Name", file.name);
+    xhr.send(file); // Simple!
+
+    function onloadstartHandler(evt) {
+        $('#upload-status').html('Upload started!');
+    }
+
+    function onloadHandler(evt) {
+        $('#upload-status').html('Upload successful!');
+    }
+
+    function onprogressHandler(evt) {
+        var percent = evt.loaded/evt.total*100;
+        $('#progress').html('Progress: ' + percent.toFixed(2) + '%');
+    }
+
+    function onreadystatechangeHandler(evt) {
+        var status = null;
+
+        try {
+            status = evt.target.status;
+        }
+        catch(e) {
+            return;
+        }
+
+        if (status == '200' && evt.target.responseText) {
+          $('#result').html('<p>The server saw it as:</p><pre>' + evt.target.responseText + '</pre>');
+        }
+    }
+  }
+});

superupload.rb

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+require 'json'
+
+get '/' do
+  haml :index
+end
+
+post '/' do
+  JSON.generate(params[:file])
+end

views/index.haml

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+!!!
+%html{:lang => "en"}
+  %head
+    %meta{:charset => "utf-8"}
+    %title Superupload
+    %script{:src => "http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"}
+    %script{:src => "/superupload.js"}
+  %body
+    %input#the-file{:name => "file", :type => "file"}
+    %p#upload-status
+    %p#progress
+    #result