Class: PrintController

Inherits:
ApplicationController show all
Defined in:
app/controllers/print_controller.rb

Overview

Mapfish print controller with access control and servlet call

Defined Under Namespace

Classes: JavaError

Constant Summary collapse

TMP_PREFIX =

WARNING: use NFS for multi-node setups! TODO: external config

"/opt/geodata/tmp/mfPrintTempFile"
TMP_SUFFIX = 
".pdf"
TMP_PURGE_SECONDS = 
600
OUTPUT_FORMATS = 
["pdf", "png", "jpg", "tif", "gif"]

Instance Method Summary collapse

Constructor Details

#initialize ⇒ PrintController

Returns a new instance of PrintController.



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# File 'app/controllers/print_controller.rb', line 21

def initialize
  @configFile = "#{Rails.root}/config/print.yml"
end

Instance Method Details

#create ⇒ Object 



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# File 'app/controllers/print_controller.rb', line 65

def create
  cleanupTempFiles

  accessible_topics = Topic.accessible_by(current_ability).collect{ |topic| topic.name }
  layers_to_delete = []
  request.parameters["layers"].each do |layer|
    if layer["baseURL"] # WMS layers
      topic = File.basename(URI.parse(layer["baseURL"]).path)
      if accessible_topics.include?(topic)
        # rewrite URL for local WMS, use CGI if layer filter is used
        use_cgi = !layer["customParams"].nil? && layer["customParams"].any? { |param, value| param =~ LAYER_FILTER_REGEX }
        layer["baseURL"] = rewrite_wms_uri(layer["baseURL"], use_cgi)
        if layer["customParams"] #Set map_resolution for mapserver (MapFish print bug?)
          layer["customParams"].delete("DPI")
          layer["customParams"]["map_resolution"] = request.parameters["dpi"]
        end
        # For permission check in WMS controller: pass session as WMS request parameter
        #layer["customParams"]["session"] =
      else
        # collect inaccessible layers for later removal
        layers_to_delete << layer
      end
    end

    if layer["baseURL"].nil? && layer["styles"] #Vector layers
      layer["styles"].each_value do |style| #NoMethodError (undefined method `each_value' for [""]:Array):
        if style["externalGraphic"]
          style["externalGraphic"].gsub!(LOCAL_GRAPHICS_HOST, '127.0.0.1')
          style["externalGraphic"].gsub!(/^https:/, 'http:')
        end
      end
    end
  end
  # remove inaccessible layers
  request.parameters["layers"] -= layers_to_delete

  request.parameters["pages"].each do |page|
    # round center coordinates
    page["center"].collect! {|coord| (coord * 100.0).round / 100.0  }
    # add blank user strings if missing
    page["user_title"] = " " if page["user_title"].blank?
    page["user_comment"] = " " if page["user_comment"].blank?
    # base url
    page["base_url"] = "#{request.protocol}#{request.host}"
    # disclaimer
    topic = Topic.accessible_by(current_ability).where(:name => page["topic"]).first
    page["disclaimer"] = topic.nil? ? Topic.default_print_disclaimer : topic.print_disclaimer
  end

  logger.info request.parameters.to_yaml

  if PRINT_URL.present?
    call_servlet(request)
  else
    #print-standalone
    tempId = SecureRandom.random_number(2**31)
    temp = TMP_PREFIX + tempId.to_s + TMP_SUFFIX
    cmd = baseCmd + " --output=" + temp
    result = ""
    errors = ""
    status = POpen4::popen4(cmd) do |stdout, stderr, stdin, pid|
      stdin.puts request.parameters.to_json
      #body = request.body
      #FileUtils.copy_stream(body, stdin)
      #body.close
      stdin.close
      result = stdout.readlines.join("\n")
      errors = stderr.readlines.join("\n")
    end
    if status.nil? || status.exitstatus != 0
      raise JavaError.new(cmd, errors)
    else
      convert_and_send_link(temp, tempId, request.parameters["dpi"], request.parameters["outputFormat"])
    end
  end
end

#info ⇒ Object 



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# File 'app/controllers/print_controller.rb', line 31

def info
  #if PRINT_URL.present?
  #TODO:  call_servlet(request)
  cmd = baseCmd + " --clientConfig"
  result = ""
  errors = ""
  status = POpen4::popen4(cmd) do |stdout, stderr, stdin, pid|

    result = stdout.readlines.join("\n")
    errors = stderr.readlines.join("\n")
  end
  if status.nil? || status.exitstatus != 0
    raise JavaError.new(cmd, errors)
  else
    info = ActiveSupport::JSON.decode(result)
    info['createURL'] = url_for(:protocol => request.protocol, :action=>'create') + '.json'
    # add output formats
    info['outputFormats'] = []
    OUTPUT_FORMATS.each do |output_format|
      info['outputFormats'] << {:name => output_format}
    end

    respond_to do |format|
      format.json do
        if params[:var]
          render :text=>"var "+params[:var]+"="+result+";"
        else
          render :json=>info
        end
      end
    end
  end
end

#show ⇒ Object 



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# File 'app/controllers/print_controller.rb', line 142

def show
  output_format = params[:format]
  if OUTPUT_FORMATS.include?(output_format)
    temp = TMP_PREFIX + params[:id] + ".#{output_format}"
    case output_format
    when "pdf"
      type = 'application/x-pdf'
    when "png"
      type = 'image/png'
    when "jpg"
      type = 'image/jpeg'
    when "tif"
      type = 'image/tiff'
    when "gif"
      type = 'image/gif'
    end
    send_file temp, :type => type, :disposition => 'attachment', :filename => params[:id] + ".#{output_format}"
  end
end