Improve broadcast message logic

Expect broadcast message API endpoint to return 200 with empty JSON if
no broadcast messages available

CHANGELOG

+v2.5.1
+  - Expect broadcast message to return empty JSON if no message now
+
 v2.5.0
   - Support git-annex tool (disabled by default)
   - Add rubocop (Ruby static code analyzer) for development

VERSION

-2.5.0
+2.5.1

lib/gitlab_net.rb

@@ -45,11 +45,7 @@ class GitlabNet
 
   def broadcast_message
     resp = get("#{host}/broadcast_message")
-    if resp.code == '200'
-      JSON.parse(resp.body) rescue nil
-    else
-      nil
-    end
+    JSON.parse(resp.body) rescue {}
   end
 
   def check
@@ -95,7 +91,7 @@ class GitlabNet
     $logger.debug "Performing #{method.to_s.upcase} #{url}"
 
     uri = URI.parse(url)
-    
+
     http = http_client_for(uri)
     request = http_request_for(method, uri, params)
 
@@ -103,7 +99,7 @@ class GitlabNet
       response = http.start { http.request(request) }
     rescue => e
       $logger.warn "Failed to connect to internal API <#{method.to_s.upcase} #{url}>: #{e.inspect}"
-      raise ApiUnreachableError 
+      raise ApiUnreachableError
     end
 
     if response.code == "200"

lib/gitlab_post_receive.rb

@@ -20,11 +20,13 @@ class GitlabPostReceive
 
     begin
       broadcast_message = GitlabNet.new.broadcast_message
-      if broadcast_message
+
+      if broadcast_message.has_key?("message")
         puts
         print_broadcast_message(broadcast_message["message"])
       end
     rescue GitlabNet::ApiUnreachableError
+      nil
     end
   end
 

spec/gitlab_net_spec.rb

@@ -70,7 +70,7 @@ describe GitlabNet, vcr: true do
       it 'should return nil' do
         VCR.use_cassette("broadcast_message-none") do
           result = gitlab_net.broadcast_message
-          result.should == nil
+          result.should == {}
         end
       end
     end
@@ -125,7 +125,7 @@ describe GitlabNet, vcr: true do
 
     it "raises an exception if the connection fails" do
       Net::HTTP.any_instance.stub(:request).and_raise(StandardError)
-      expect { 
+      expect {
         gitlab_net.check_access('git-upload-pack', 'gitlab/gitlabhq.git', 'user-1', changes)
       }.to raise_error(GitlabNet::ApiUnreachableError)
     end

spec/vcr_cassettes/broadcast_message-none.yml

@@ -15,7 +15,7 @@ http_interactions:
       - Ruby
   response:
     status:
-      code: 404
+      code: 200
       message: Not Found
     headers:
       Server:
@@ -32,7 +32,7 @@ http_interactions:
       - 200 OK
     body:
       encoding: UTF-8
-      string: '{"message":"404 Not Found"}'
+      string: '{}'
     http_version: 
   recorded_at: Sat, 07 Feb 2015 16:45:35 GMT
 recorded_with: VCR 2.4.0