parse webfinger without guid and public key

lib/diaspora_federation/discovery/h_card.rb

@@ -70,10 +70,8 @@ module DiasporaFederation
       #   DER-encoded PKCS#1 key beginning with the text
       #   "-----BEGIN PUBLIC KEY-----" and ending with "-----END PUBLIC KEY-----".
       #
-      #   @note the public key is new in the hcard and is optional now.
-      #
       #   @return [String] public key
-      property :public_key, default: nil
+      property :public_key
 
       # @!attribute [r] photo_large_url
       #   @return [String] url to the big avatar (300x300)
@@ -172,14 +170,14 @@ module DiasporaFederation
           photo_medium_url: photo_from_doc(doc, :photo_medium),
           photo_small_url:  photo_from_doc(doc, :photo_small),
           searchable:       (content_from_doc(doc, :searchable) == "true"),
+          # TODO: public key is new and can be missing
+          public_key:       (content_from_doc(doc, :key) unless element_from_doc(doc, :key).nil?),
 
           # TODO: remove me!  ###################
           first_name:       content_from_doc(doc, :given_name),
           last_name:        content_from_doc(doc, :family_name)
           #######################################
         }
-        # TODO: public key is new and can be missing
-        data[:public_key] = content_from_doc(doc, :key) unless element_from_doc(doc, :key).nil?
         new(data)
       end
 

lib/diaspora_federation/discovery/web_finger.rb

@@ -147,20 +147,23 @@ module DiasporaFederation
       def self.from_xml(webfinger_xml)
         data = parse_xml_and_validate(webfinger_xml)
 
-        hcard_url, seed_url, guid, profile_url, atom_url, salmon_url, public_key = parse_links(data)
+        links = data[:links]
+
+        # TODO: remove! public key is deprecated in webfinger
+        public_key  = parse_link(links, REL_PUBKEY)
 
         new(
           acct_uri:    data[:subject],
           alias_url:   data[:aliases].first,
-          hcard_url:   hcard_url,
+          hcard_url:   parse_link(links, REL_HCARD),
-          seed_url:    seed_url,
+          seed_url:    parse_link(links, REL_SEED),
-          profile_url: profile_url,
+          profile_url: parse_link(links, REL_PROFILE),
-          atom_url:    atom_url,
+          atom_url:    parse_link(links, REL_ATOM),
-          salmon_url:  salmon_url,
+          salmon_url:  parse_link(links, REL_SALMON),
 
           # TODO: remove me!  ##########
-          guid:        guid,
+          guid:        parse_link(links, REL_GUID),
-          public_key:  Base64.strict_decode64(public_key)
+          public_key:  (Base64.strict_decode64(public_key) if public_key)
         )
       end
 
@@ -209,22 +212,9 @@ module DiasporaFederation
         ##################################
       end
 
-      def self.parse_links(data)
-        links = data[:links]
-        hcard   = parse_link(links, REL_HCARD)
-        seed    = parse_link(links, REL_SEED)
-        guid    = parse_link(links, REL_GUID)
-        profile = parse_link(links, REL_PROFILE)
-        atom    = parse_link(links, REL_ATOM)
-        salmon  = parse_link(links, REL_SALMON)
-        pubkey  = parse_link(links, REL_PUBKEY)
-        raise InvalidData, "webfinger xml is incomplete" unless [hcard, seed, guid, profile, atom, salmon, pubkey].all?
-        [hcard[:href], seed[:href], guid[:href], profile[:href], atom[:href], salmon[:href], pubkey[:href]]
-      end
-      private_class_method :parse_links
-
       def self.parse_link(links, rel)
-        links.find {|l| l[:rel] == rel }
+        element = links.find {|l| l[:rel] == rel }
+        element ? element[:href] : nil
       end
       private_class_method :parse_link
     end

spec/lib/diaspora_federation/discovery/web_finger_spec.rb

@@ -97,8 +97,35 @@ XML
         expect(wf.public_key).to eq(person.serialized_public_key)
       end
 
+      it "reads future XML without guid and public key" do
+        future_xml = <<-XML
+<?xml version="1.0" encoding="UTF-8"?>
+<XRD xmlns="http://docs.oasis-open.org/ns/xri/xrd-1.0">
+  <Subject>#{acct}</Subject>
+  <Alias>#{person.alias_url}</Alias>
+  <Link rel="http://microformats.org/profile/hcard" type="text/html" href="#{person.hcard_url}"/>
+  <Link rel="http://joindiaspora.com/seed_location" type="text/html" href="#{person.url}"/>
+  <Link rel="http://webfinger.net/rel/profile-page" type="text/html" href="#{person.profile_url}"/>
+  <Link rel="http://schemas.google.com/g/2010#updates-from" type="application/atom+xml" href="#{person.atom_url}"/>
+  <Link rel="salmon" href="#{person.salmon_url}"/>
+</XRD>
+XML
+
+        wf = Discovery::WebFinger.from_xml(future_xml)
+        expect(wf.acct_uri).to eq(acct)
+        expect(wf.alias_url).to eq(person.alias_url)
+        expect(wf.hcard_url).to eq(person.hcard_url)
+        expect(wf.seed_url).to eq(person.url)
+        expect(wf.profile_url).to eq(person.profile_url)
+        expect(wf.atom_url).to eq(person.atom_url)
+        expect(wf.salmon_url).to eq(person.salmon_url)
+
+        expect(wf.guid).to be_nil
+        expect(wf.public_key).to be_nil
+      end
+
       it "fails if the document is empty" do
-        invalid_xml = <<XML
+        invalid_xml = <<-XML
 <?xml version="1.0" encoding="UTF-8"?>
 <XRD xmlns="http://docs.oasis-open.org/ns/xri/xrd-1.0">
 </XRD>