improve webfinger failure handling

* do not raise if profile xrd isn't found
* error out on a ssl error rather than on the unexpected nil value later
* be more verbose about failed xrd fetches

lib/webfinger.rb

@@ -29,7 +29,12 @@ class Webfinger
   def get(url)
     Rails.logger.info("Getting: #{url} for #{account}")
     begin
-      Faraday.get(url).body
+      res = Faraday.get(url)
+      return false if res.status == 404
+      res.body
+    rescue OpenSSL::SSL::SSLError => e
+      Rails.logger.info "Failed to fetch #{url}: SSL setup invalid"
+      raise e
     rescue => e
       Rails.logger.info("Failed to fetch: #{url} for #{account}; #{e.message}")
       raise e
@@ -51,7 +56,7 @@ class Webfinger
     else
       person = make_person_from_webfinger
     end
-    FEDERATION_LOGGER.info("successfully webfingered#{@account}")
+    FEDERATION_LOGGER.info("successfully webfingered#{@account}") if person
     person
   end
 
@@ -64,7 +69,7 @@ class Webfinger
         self.ssl = false
         retry
       else
-        raise I18n.t('webfinger.xrd_fetch_failed', :account => account)
+        raise "there was an error getting the xrd from account #{@account}: #{e.message}"
       end
     end
   end
@@ -90,6 +95,8 @@ class Webfinger
 
   def webfinger_profile_xrd
     @webfinger_profile_xrd ||= get(webfinger_profile_url)
+    FEDERATION_LOGGER.info "#{@account} doesn't exists anymore" if @webfinger_profile_xrd == false
+    @webfinger_profile_xrd
   end
 
   def hcard_xrd
@@ -97,7 +104,7 @@ class Webfinger
   end
 
   def make_person_from_webfinger
-    Person.create_from_webfinger(webfinger_profile, hcard)
+    Person.create_from_webfinger(webfinger_profile, hcard) unless webfinger_profile_xrd == false
   end
 
   def host_meta_url

spec/lib/webfinger_spec.rb

@@ -72,6 +72,15 @@ describe Webfinger do
 
       a_request(:get, redirect_url).should have_been_made
     end
+    
+    it 'returns false on 404' do
+      url ="https://bar.com/.well-known/host-meta"
+      stub_request(:get, url).
+        to_return(:status => 404, :body => nil)
+
+      finger.get(url).should_not == nil
+      finger.get(url).should == false
+    end
   end
 
   describe 'existing_person_with_profile?' do
@@ -176,10 +185,17 @@ describe Webfinger do
   describe '#make_person_from_webfinger' do
     it 'with an hcard and a webfinger_profile, it calls Person.create_from_webfinger' do
       finger.stub(:hcard).and_return("hcard")
+      finger.stub(:webfinger_profile_xrd).and_return("webfinger_profile_xrd")
       finger.stub(:webfinger_profile).and_return("webfinger_profile")
       Person.should_receive(:create_from_webfinger).with("webfinger_profile", "hcard")
       finger.make_person_from_webfinger
     end
+    
+    it 'with an false xrd it does not call Person.create_from_webfinger' do
+      finger.stub(:webfinger_profile_xrd).and_return(false)
+      Person.should_not_receive(:create_from_webfinger)
+      finger.make_person_from_webfinger
+    end
   end