Allow to download logs in plain text

lib/travis/api/app/helpers/respond_with.rb

@@ -29,7 +29,7 @@ class Travis::Api::App
         end
 
         def responders(resource, options)
-          [:Service, :Json, :Image, :Xml].map do |name|
+          [:Service, :Json, :Image, :Xml, :Plain].map do |name|
             Responders.const_get(name)
           end
         end

lib/travis/api/app/middleware/rewrite.rb

@@ -3,7 +3,7 @@ require 'travis/api/app'
 class Travis::Api::App
   class Middleware
     class Rewrite < Middleware
-      FORMAT      = %r(\.(json|xml|png)$)
+      FORMAT      = %r(\.(json|xml|png|txt)$)
       V1_REPO_URL = %r(^(/[^/]+/[^/]+(?:/builds(?:/[\d]+)?|/cc)?)$)
 
       helpers :accept

lib/travis/api/app/responders.rb

@@ -5,6 +5,7 @@ class Travis::Api::App
     autoload :Base,    'travis/api/app/responders/base'
     autoload :Image,   'travis/api/app/responders/image'
     autoload :Json,    'travis/api/app/responders/json'
+    autoload :Plain,   'travis/api/app/responders/plain'
     autoload :Service, 'travis/api/app/responders/service'
     autoload :Xml,     'travis/api/app/responders/xml'
   end

lib/travis/api/app/responders/plain.rb

@@ -0,0 +1,22 @@
+module Travis::Api::App::Responders
+  class Plain < Base
+    def apply?
+      # make sure that we don't leak anything by processing only Artifact::Log
+      # instances here. I don't want to create entire new API builder just
+      # for log's content for now.
+      #
+      # TODO: think how to handle other formats correctly
+      options[:format] == 'txt' && resource.is_a?(Artifact::Log)
+    end
+
+    def apply
+      filename    = resource.id
+      disposition = params[:attachment] ? 'attachment' : 'inline'
+
+      headers['Content-Disposition'] = %(#{disposition}; filename="#{filename}")
+
+      endpoint.content_type 'text/plain'
+      halt resource.content
+    end
+  end
+end

spec/unit/endpoint/artifacts_spec.rb

@@ -9,4 +9,22 @@ describe Travis::Api::App::Endpoint::Artifacts do
       get("/artifacts/#{id}", {}, 'HTTP_ACCEPT' => 'application/vnd.travis-ci.2+json, */*; q=0.01').should be_ok
     end
   end
+
+  describe 'GET /artifacts/:id.txt' do
+    it 'loads the artifact' do
+      response = get("/artifacts/#{id}.txt", {})
+
+      response.should be_ok
+      response.body.should == artifact.content
+      response.headers['Content-Disposition'].should == "inline; filename=\"#{artifact.id}\""
+    end
+
+    it 'sets Content-Disposition to attachment with attachment=true param' do
+      response = get("/artifacts/#{id}.txt", {'attachment' => true})
+
+      response.should be_ok
+      response.body.should == artifact.content
+      response.headers['Content-Disposition'].should == "attachment; filename=\"#{artifact.id}\""
+    end
+  end
 end