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# Copyright (C) 2007, 2008, 2009, 2010 Heiko Bernloehr (FreeIT.de).
#
# This file is part of ECS.
#
# ECS is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of
# the License, or (at your option) any later version.
#
# ECS is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public
# License along with ECS. If not, see <http://www.gnu.org/licenses/>.
class MessagesController < ApplicationController
before_filter :late_initialize
before_filter :authentication
before_filter :add_cookie_header
before_filter :get_record, :only => [:show, :update, :destroy]
after_filter :touch_participant_ttl
def initialize
super
@render_cmd=nil
end
def index
index_querystring_list
@list.each do |li|
@body << @ressource_name << "/" << li.id.to_s << "\n"
end unless @list.empty?
index_render
end
def show
# TODO Webcache via stale? and fresh_when
@memberships = Membership.receiver(@participant.id, @record.id)
case
when @record.outtimed_auths_resource_by_non_owner?(@app_namespace, @resource_name, @participant)
raise Ecs::OuttimedAuthsException, 'Authorization token outtimed'
when (!@memberships.empty? or @participant.sender?(@record))
@record.filter(__method__, @app_namespace, @ressource_name, params)
@body = @record.body
show_render
eval(@render_cmd) unless @render_cmd.blank?
else
raise Ecs::AuthorizationException,
"You are not allowed to access this resource, " +
"because you are not the original sender or a receiver."
end
end
# Create and save a new message. Then render "Created 201" response.
# TODO exceptions for: create, constantize
def create
@record= Message.create__(request, @app_namespace, @ressource_name, @participant)
@body = @record.body
create_render
end
def update
@record.update__(request, @app_namespace, @ressource_name, @participant)
update_render
end
def destroy
@body = @record.body
@memberships = Membership.receiver(@participant.id, @record.id)
show_render
case
when @record.outtimed_auths_resource_by_non_owner?(@app_namespace, @resource_name, @participant)
@record.destroy_as_receiver(@participant)
raise Ecs::OuttimedAuthsException, 'Authorization token outtimed'
when (@participant.sender?(@record) and not @participant.receiver?(@record))
@record.destroy_as_sender
else
@record.destroy_as_receiver(@participant)
end
eval(@render_cmd) unless @render_cmd.blank?
end
def fifo
queue(:queue_type => :fifo)
end
def lifo
queue(:queue_type => :lifo)
end
def details
details = nil
no_data_to_render = false
if params["id"]
# member subresource
details = member_subresource_details(params["id"])
if !details[:receivers] then no_data_to_render = true end
else
index_querystring_list
# collection subresource
details ||= []
@list.each do |li|
details << member_subresource_details(li.id)
end unless @list.empty?
if details.empty? then no_data_to_render = true end
end
if no_data_to_render
render :text => "", :content_type => "application/json", :layout => false
else
respond_to do |format|
format.json { render :json => JSON.pretty_generate(details) }
format.xml { render :xml => details }
end
end
end
protected
def member_subresource_details(record_id)
get_record(record_id)
if @participant.sender?(@record) or @participant.receiver?(@record)
receivers=[]
senders=[]
Membership.receivers(@record.id).each do |recv|
receivers << { :pid => recv.participant.id, :mid => recv.id, :cid => recv.community_id,
:itsyou => recv.participant_id == @participant.id }
senders << { :mid => Membership.find_by_participant_id_and_community_id(@record.sender, recv.community_id).id }
end
content_type = @record.content_type
url = @ressource_name + "/" + record_id.to_s
{ :receivers => receivers,
:senders => senders,
:content_type => content_type,
:url => url,
:owner => { :itsyou => @participant.id == @record.sender,
:pid => @record.sender }
}
else
raise Ecs::AuthorizationException,
"You are not allowed to access this resource, " +
"because you are not the original sender or a receiver."
end
end
def index_querystring_list
header_querystrings = request.headers["X-EcsQueryStrings"]
if header_querystrings
hqs = header_querystrings.split(",").map{|s| s.strip}.map{|s| s.split("=").map{|s| s.strip}}
sender = (m=hqs.assoc("sender")) ? m[1] : nil
receiver = (m=hqs.assoc("receiver")) ? m[1] : nil
all = (m=hqs.assoc("all")) ? m[1] : nil
end
sender ||= params["sender"] ? params["sender"] : nil
receiver ||= params["receiver"] ? params["receiver"] : nil
all ||= params["all"] ? params["all"] : nil
case
when sender == "true"
@list = Message.for_participant_sender(@participant).for_resource(@app_namespace,@ressource_name).for_not_removed.uniq
when receiver == "true"
@list = Message.for_participant_receiver(@participant).for_resource(@app_namespace,@ressource_name).for_not_removed.uniq
when all == "true"
list1 = Message.for_participant_sender(@participant).for_resource(@app_namespace,@ressource_name).for_not_removed
list2 = Message.for_participant_receiver(@participant).for_resource(@app_namespace,@ressource_name).for_not_removed
@list = list1.concat(list2).uniq
else
@list = Message.for_participant_receiver(@participant).for_resource(@app_namespace,@ressource_name).for_not_removed.uniq
end
end
def queue(queue_options = {:queue_type => :fifo})
begin
Message.transaction do
# returned record holds a lock (pessimistic locking)
@record = Message.fifo_lifo_rest(@app_namespace, @ressource_name,@participant.id, queue_options)
if @record
@memberships = Membership.receiver(@participant.id, @record.id)
@body = @record.body
if request.post?
if @record
show_render
@record.destroy_as_receiver(@participant)
eval(@render_cmd) unless @render_cmd.blank?
else
raise ActiveRecord::RecordNotFound
end
else
show_render
eval(@render_cmd) unless @render_cmd.blank?
end
else
empty_render
end
end
rescue ActiveRecord::StaleObjectError, ActiveRecord::RecordNotFound => error
logger.info "Concurrent access at queue resource"
raise
end
end
# inititialize instance variables dependent from request object
def late_initialize
@app_namespace= request.path.sub(/^\//,'').sub(/\/.*/,'')
@ressource_name= $&.sub(/\//,'').sub(/\/.*/,'')
#@ar_model_name= "#{@app_namespace}_#{@ressource_name}".pluralize.classify
#@ar_model= @ar_model_name.constantize
end
# get a record out of the message table
def get_record(record_id = params["id"], app_namespace=@app_namespace, ressource_name=@ressource_name)
@record, @outdated_auth_token = Message.get_record(record_id, app_namespace, ressource_name)
end
def empty_render
render :text => "", :content_type => "application/json"
end
def index_render
render :text => @body, :content_type => "text/uri-list"
end
def show_render
#expires_in 3.hours, 'max-stale' => 5.hours, :public => true
headers["Cache-Control"] = "private, max-age=5"
x_ecs_receiver_communities= ""
x_ecs_sender= ""
@memberships.each do |memb|
x_ecs_receiver_communities << memb.community.id.to_s
x_ecs_sender << Membership.find_by_participant_id_and_community_id(Participant.find(@record.sender).id, memb.community.id).id.to_s
unless @memberships.last == memb
x_ecs_receiver_communities << ","
x_ecs_sender << ","
end
end unless @memberships.blank?
headers["X-EcsReceiverCommunities"]= x_ecs_receiver_communities unless x_ecs_receiver_communities.blank?
headers["X-EcsSender"]= x_ecs_sender unless x_ecs_sender.blank?
@render_cmd='render :text => @body, :layout => false, :status => 200, :content_type => Mime::Type.lookup(@record.content_type)'
end
def create_render
location = request.protocol + request.host
# FIXME request.headers["SERVER_PORT"] is a string compared to integers.
location += ":" + request.headers["SERVER_PORT"] unless [80,443].include? request.headers["SERVER_PORT"]
location += request.headers["SCRIPT_NAME"] if request.headers["SCRIPT_NAME"]
location += request.path.gsub(/\/*$/,'') + "/" + @record.id.to_s
if @app_namespace == 'sys' and @ressource_name == 'auths'
render :text => @body, :layout => false, :status => 201, :location => location, :content_type => Mime::Type.lookup_by_extension("json")
else
render :text => "", :layout => false, :status => 201, :location => location, :content_type => Mime::Type.lookup(@record.content_type)
end
end
def update_render
location = request.protocol + request.host
location += request.headers["SCRIPT_NAME"] if request.headers["SCRIPT_NAME"]
location += request.path.gsub(/\/*$/,'')
render :text => "", :layout => false, :status => 200,
:location => location
end
def destroy_render
render :nothing => true, :layout => false, :status => 200,
:content_type => "application/json"
end
end
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