bigdir/app/controllers/avatar_controller.rb

class AvatarController < ApplicationController
  
     
  #before_filter :set_cache_buster   
  include AvatarHelper   
      
  def upload
    # Make sure that API users get used to set this content type
    # as it won't trigger Rails' automatic parsing of the request body for parameters
    unless request.content_type == 'application/octet-stream'
      render :nothing => true, :status => 406
      return
    end

    unless request.raw_post.nil?
     @source_type = params[:source_type]
      @source_id = params[:source_id]
      @temp_file = request.raw_post
      if @temp_file.size > 0
        if @temp_file.respond_to?(:original_filename)
          @image_file = @temp_file.original_filename
          #image_file.force_encoding("UTF-8") if filename.respond_to?(:force_encoding)
        else
          @image_file=params[:filename]
        end      
      end
    end
    if  @temp_file && (@temp_file.size > 0)
      diskfile=disk_filename(@source_type,@source_id)
      @urlfile='/' << File.join("images","avatars",avatar_directory(@source_type),avatar_filename(@source_id,@image_file))
      logger.info("Saving avatar '#{diskfile}' (#{@temp_file.size} bytes)")
      path = File.dirname(diskfile)
      unless File.directory?(path)
        FileUtils.mkdir_p(path)
      end
      md5 = Digest::MD5.new
      File.open(diskfile, "wb") do |f|
        if @temp_file.respond_to?(:read)
          buffer = ""
          while (buffer = @temp_file.read(8192))
            f.write(buffer)
            md5.update(buffer)
          end
        else
        f.write(@temp_file)
        md5.update(@temp_file)
        end
      end
#    self.digest = md5.hexdigest
    end
    @temp_file = nil
    # @avatar = Avatar.new(:receive_file => request.raw_post)
    # @avatar.source_id = User.current.id
    # @avatar.image_file = params[:filename].presence || Redmine::Utils.random_hex(16)
    # saved = @avatar.save
    begin
      f = Magick::ImageList.new(diskfile)
      width = 300.0
      proportion = (width/f[0].columns)
      height = (f[0].rows*proportion)
      f.resize_to_fill!(width,height)
      # f.scale!(width,height)
      f.write(diskfile)
    rescue Exception => e
      logger.error "[Error] avatar : avatar_controller#upload ===> #{e}"
    end

    
    respond_to do |format|
      format.js
      format.api {
        if saved
          render :action => 'upload', :status => :created
        else
          render_validation_errors(@avatar)
        end
      }
    end
  end
  
  private
  
    def set_cache_buster  
      response.headers["Cache-Control"] = "no-cache, no-store, max-age=0, must-revalidate"  
      response.headers["Pragma"] = "no-cache"  
      response.headers["Expires"] = "Fri, 01 Jan 1990 00:00:00 GMT"  
    end 


end