Merge pull request #2027 from CocoaPods/feature-allow-homepage-redirects

Feature allow homepage redirects

CHANGELOG.md

@@ -33,6 +33,12 @@ To install or update CocoaPods see this [guide](http://docs.cocoapods.org/guides
   [Samuel Ford](https://github.com/samuelwford)
   [#1042](https://github.com/CocoaPods/CocoaPods/issues/1042)
 
+##### Bug Fixes
+
+* Support HTTP redirects when linting homepage and screenshots.
+  [Boris Bügling](https://github.com/neonichu)
+  [#2027](https://github.com/CocoaPods/CocoaPods/pull/2027)
+
 ## 0.31.1
 [CocoaPods](https://github.com/CocoaPods/CocoaPods/compare/0.31.1...0.31.0)
 • [CocoaPods-Core](https://github.com/CocoaPods/Core/compare/0.31.1...0.31.0)

lib/cocoapods/validator.rb

@@ -223,13 +223,32 @@ module Pod
     attr_accessor :consumer
     attr_accessor :subspec_name
 
+    MAX_HTTP_REDIRECTS = 3
+
     # Performs validation of a URL
     #
     def validate_url(url)
       require 'rest'
 
       begin
-        resp = ::REST.head(url)
+        redirects = 0
+        resp = nil
+        loop do
+          resp = ::REST.head(url)
+
+          if resp.status_code == 405
+            resp = ::REST.get(url)
+          end
+
+          if [301, 302, 303, 307, 308].include? resp.status_code
+            url = resp.headers['location'].first
+            redirects += 1
+          else
+            break
+          end
+
+          break unless redirects < MAX_HTTP_REDIRECTS
+        end
       rescue
         warning "There was a problem validating the URL #{url}."
         resp = nil
@@ -253,7 +272,7 @@ module Pod
     # Performs validation related to the `screenshots` attribute.
     #
     def validate_screenshots(spec)
-      spec.screenshots.each do |screenshot|
+      spec.screenshots.compact.each do |screenshot|
         request = validate_url(screenshot)
         if request && !(request.headers['content-type'] && request.headers['content-type'].first =~ /image\/.*/i)
           warning "The screenshot #{screenshot} is not a valid image."

spec/unit/validator_spec.rb

@@ -109,6 +109,33 @@ module Pod
           @sut.validate
           @sut.results.map(&:to_s).first.should.match /There was a problem validating the URL/
         end
+
+        it "does not fail if the homepage redirects" do
+          WebMock::API.stub_request(:head, /redirect/).to_return(
+            :status => 301, :headers => { 'Location' => 'http://banana-corp.local/found/' } )
+          WebMock::API.stub_request(:head, /found/).to_return( :status => 200 )
+          Specification.any_instance.stubs(:homepage).returns('http://banana-corp.local/redirect/')
+          @sut.validate
+          @sut.results.length.should.equal 0
+        end
+
+        it "does not fail if the homepage does not support HEAD" do
+          WebMock::API.stub_request(:head, /page/).to_return( :status => 405 )
+          WebMock::API.stub_request(:get, /page/).to_return( :status => 200 )
+          Specification.any_instance.stubs(:homepage).returns('http://banana-corp.local/page/')
+          @sut.validate
+          @sut.results.length.should.equal 0
+        end
+
+        it "does not follow redirects infinitely" do
+          WebMock::API.stub_request(:head, /redirect/).to_return(
+            :status => 301,
+            :headers => { 'Location' => 'http://banana-corp.local/redirect/' } )
+          Specification.any_instance.stubs(:homepage).returns(
+            'http://banana-corp.local/redirect/')
+          @sut.validate
+          @sut.results.map(&:to_s).first.should.match /The URL \(.*\) is not reachable/
+        end
       end
 
       describe "Screenshot validation" do