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class TasksController < ApplicationController
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before_filter :authenticate, :check_viewability
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def index
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redirect_to :action => 'list'
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end
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def list
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@problems = @user.available_problems
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end
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# this has contest-wide access control
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def view
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base_name = params[:file]
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base_filename = File.basename("#{base_name}.#{params[:ext]}")
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filename = "#{Problem.download_file_basedir}/#{base_filename}"
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if !FileTest.exists?(filename)
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redirect_to :action => 'index' and return
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end
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send_file_to_user(filename, base_filename)
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end
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# this has problem-level access control
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def download
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problem = Problem.find(params[:id])
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if !problem or !problem.available or !@user.can_view_problem? problem
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redirect_to :action => 'index' and return
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end
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base_name = params[:file]
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base_filename = File.basename("#{base_name}.#{params[:ext]}")
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filename = "#{Problem.download_file_basedir}/#{params[:id]}/#{base_filename}"
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puts "SENDING: #{filename}"
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if !FileTest.exists?(filename)
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redirect_to :action => 'index' and return
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end
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puts "SENDING: #{filename}"
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send_file_to_user(filename, base_filename)
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end
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protected
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def send_file_to_user(filename, base_filename)
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if defined?(USE_APACHE_XSENDFILE) and USE_APACHE_XSENDFILE
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response.headers['Content-Type'] = "application/force-download"
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response.headers['Content-Disposition'] = "attachment; filename=\"#{File.basename(filename)}\""
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response.headers["X-Sendfile"] = filename
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response.headers['Content-length'] = File.size(filename)
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render :nothing => true
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else
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if params[:ext]=='pdf'
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content_type = 'application/pdf'
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else
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content_type = 'application/octet-stream'
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end
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send_file filename, :stream => false, :disposition => 'inline', :filename => base_filename, :type => content_type
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end
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end
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def check_viewability
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@user = User.find(session[:user_id])
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if @user==nil or !GraderConfiguration.show_tasks_to?(@user)
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redirect_to :controller => 'main', :action => 'list'
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return false
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end
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end
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end
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