Gollum with basic auth + file uploads

_Footer.txt

<!-- commit this to your wiki as _Footer.md -->
<div id="file-upload">
  <form action="/upload" method="post" enctype="multipart/form-data">
    <label for="file">Upload a file: <input type="file" name="file"></label>
    <input type="submit" value="Upload">
  </form>
</div>

app.rb

require 'gollum/frontend/app'
require 'digest/sha1'

class App < Precious::App
  User = Struct.new(:name, :email, :password_hash, :can_write)
 
  before { authenticate! }
 
  helpers do
    def authenticate!
      @auth ||=  Rack::Auth::Basic::Request.new(request.env)
      if @auth.provided? && @auth.basic? && @auth.credentials
        set_author
      else
        response['WWW-Authenticate'] = %(Basic realm="Gollum Wiki")
        throw(:halt, [401, "Not authorized\n"])
      end
    end
 
    def set_author
      session['gollum.author'] = {
        :name => @auth.username,
        :email => "#{@auth.username}@instructure.com",
      }
    end
  end

  post "/upload" do
    if params[:file]
      name   = params[:file][:filename]
      format = nil
      data   = params[:file][:tempfile].read
      path   = ''
      wiki   = wiki_new

      begin
        params[:message] = "Uploaded #{name}"
        wiki.write_page(name, format, data, commit_message, path)

        redirect to("/")
      rescue Gollum::DuplicatePageError => e
        @message = "Duplicate file: #{e.message}"
        mustache :error
      end
    else
      redirect to("/")
    end
  end
end

module Gollum
  class Wiki
    alias_method :orig_page_file_name, :page_file_name
    def page_file_name(name, format)
      return name unless format
      orig_page_file_name(name, format)
    end
  end

  class Committer
    def add_to_index(dir, name, format, data, allow_same_ext = false)
      # spaces must be dashes
      dir.gsub!(' ', '-')
      name.gsub!(' ', '-')

      path = @wiki.page_file_name(name, format)

      dir = '/' if dir.strip.empty?

      fullpath = ::File.join(*[@wiki.page_file_dir, dir, path].compact)
      fullpath = fullpath[1..-1] if fullpath =~ /^\//

      if index.current_tree && tree = index.current_tree / (@wiki.page_file_dir || '/')
        tree = tree / dir unless tree.nil?
      end

      if tree
        downpath = path.downcase.sub(/\.\w+$/, '')

        tree.blobs.each do |blob|
          next if page_path_scheduled_for_deletion?(index.tree, fullpath)
          
          existing_file = blob.name.downcase.sub(/\.\w+$/, '')
          existing_file_ext = ::File.extname(blob.name).sub(/^\./, '')

          new_file_ext = ::File.extname(path).sub(/^\./, '')

          if downpath == existing_file && !(allow_same_ext && new_file_ext == existing_file_ext)
            raise DuplicatePageError.new(dir, blob.name, path)
          end
        end
      end

      fullpath = fullpath.force_encoding('ascii-8bit') if fullpath.respond_to?(:force_encoding)

      # Don't normalize for file uploads
      data = @wiki.normalize(data) if format
      index.add(fullpath, data)
    end
  end    
end

config.ru

require 'rubygems'
require 'app'

App.set(:gollum_path, File.expand_path(File.dirname(__FILE__)) + '/wiki')
App.set(:default_markup, :markdown)
App.set(:wiki_options, {
  :universal_toc => false,  # ???
  :show_all => true,        # Shows all files in file view. By default only valid pages are shown.
  # :css => true,           # Inject custom css. Uses custom.css from root repository.
  # :page_file_dir => "",   # Specify the sub directory for all page files (default: repository root).
  # :base_path => "",       # Specify the base path.
  # :gollum_path => "",     # Specify the gollum path.
  # :ref => "",             # Specify the repository ref to use (default: master).
  # :live_preview => false, # Disables livepreview.
  # :mathjax => true,       # Enables mathjax.
  # :user_icons => "",      # Set the history user icons. Valid values: gravatar, identicon, none. Default: none.
  # :collapse_tree => true, # Collapse file view tree. By default, expanded tree is shown.
  # :h1_title => true,      # Sets page title to value of first h1.
})

run App