Fix bad URL schemes being accepted (#6219)

* Fix actors accepting invalid URI schemes or different host between URI and URL

* Fix statuses accepting invalid URI scheme or different host to actor

* Adjust tests to new requirements

* Improve readability of mismatching_origin?/invalid_origin? methods

spec/lib/activitypub/activity/create_spec.rb

@@ -6,7 +6,7 @@ RSpec.describe ActivityPub::Activity::Create do
   let(:json) do
     {
       '@context': 'https://www.w3.org/ns/activitystreams',
-      id: 'foo',
+      id: [ActivityPub::TagManager.instance.uri_for(sender), '#foo'].join,
       type: 'Create',
       actor: ActivityPub::TagManager.instance.uri_for(sender),
       object: object_json,
@@ -16,6 +16,8 @@ RSpec.describe ActivityPub::Activity::Create do
   subject { described_class.new(json, sender) }
 
   before do
+    sender.update(uri: ActivityPub::TagManager.instance.uri_for(sender))
+
     stub_request(:get, 'http://example.com/attachment.png').to_return(request_fixture('avatar.txt'))
     stub_request(:get, 'http://example.com/emoji.png').to_return(body: attachment_fixture('emojo.png'))
   end
@@ -28,7 +30,7 @@ RSpec.describe ActivityPub::Activity::Create do
     context 'standalone' do
       let(:object_json) do
         {
-          id: 'bar',
+          id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
           type: 'Note',
           content: 'Lorem ipsum',
         }
@@ -52,7 +54,7 @@ RSpec.describe ActivityPub::Activity::Create do
     context 'public' do
       let(:object_json) do
         {
-          id: 'bar',
+          id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
           type: 'Note',
           content: 'Lorem ipsum',
           to: 'https://www.w3.org/ns/activitystreams#Public',
@@ -70,7 +72,7 @@ RSpec.describe ActivityPub::Activity::Create do
     context 'unlisted' do
       let(:object_json) do
         {
-          id: 'bar',
+          id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
           type: 'Note',
           content: 'Lorem ipsum',
           cc: 'https://www.w3.org/ns/activitystreams#Public',
@@ -88,7 +90,7 @@ RSpec.describe ActivityPub::Activity::Create do
     context 'private' do
       let(:object_json) do
         {
-          id: 'bar',
+          id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
           type: 'Note',
           content: 'Lorem ipsum',
           to: 'http://example.com/followers',
@@ -108,7 +110,7 @@ RSpec.describe ActivityPub::Activity::Create do
 
       let(:object_json) do
         {
-          id: 'bar',
+          id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
           type: 'Note',
           content: 'Lorem ipsum',
           to: ActivityPub::TagManager.instance.uri_for(recipient),
@@ -128,7 +130,7 @@ RSpec.describe ActivityPub::Activity::Create do
 
       let(:object_json) do
         {
-          id: 'bar',
+          id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
           type: 'Note',
           content: 'Lorem ipsum',
           inReplyTo: ActivityPub::TagManager.instance.uri_for(original_status),
@@ -151,7 +153,7 @@ RSpec.describe ActivityPub::Activity::Create do
 
       let(:object_json) do
         {
-          id: 'bar',
+          id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
           type: 'Note',
           content: 'Lorem ipsum',
           tag: [
@@ -174,7 +176,7 @@ RSpec.describe ActivityPub::Activity::Create do
     context 'with mentions missing href' do
       let(:object_json) do
         {
-          id: 'bar',
+          id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
           type: 'Note',
           content: 'Lorem ipsum',
           tag: [
@@ -194,7 +196,7 @@ RSpec.describe ActivityPub::Activity::Create do
     context 'with media attachments' do
       let(:object_json) do
         {
-          id: 'bar',
+          id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
           type: 'Note',
           content: 'Lorem ipsum',
           attachment: [
@@ -218,7 +220,7 @@ RSpec.describe ActivityPub::Activity::Create do
     context 'with media attachments missing url' do
       let(:object_json) do
         {
-          id: 'bar',
+          id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
           type: 'Note',
           content: 'Lorem ipsum',
           attachment: [
@@ -239,7 +241,7 @@ RSpec.describe ActivityPub::Activity::Create do
     context 'with hashtags' do
       let(:object_json) do
         {
-          id: 'bar',
+          id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
           type: 'Note',
           content: 'Lorem ipsum',
           tag: [
@@ -263,7 +265,7 @@ RSpec.describe ActivityPub::Activity::Create do
     context 'with hashtags missing name' do
       let(:object_json) do
         {
-          id: 'bar',
+          id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
           type: 'Note',
           content: 'Lorem ipsum',
           tag: [
@@ -284,7 +286,7 @@ RSpec.describe ActivityPub::Activity::Create do
     context 'with emojis' do
       let(:object_json) do
         {
-          id: 'bar',
+          id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
           type: 'Note',
           content: 'Lorem ipsum :tinking:',
           tag: [
@@ -310,7 +312,7 @@ RSpec.describe ActivityPub::Activity::Create do
     context 'with emojis missing name' do
       let(:object_json) do
         {
-          id: 'bar',
+          id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
           type: 'Note',
           content: 'Lorem ipsum :tinking:',
           tag: [
@@ -333,7 +335,7 @@ RSpec.describe ActivityPub::Activity::Create do
     context 'with emojis missing icon' do
       let(:object_json) do
         {
-          id: 'bar',
+          id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
           type: 'Note',
           content: 'Lorem ipsum :tinking:',
           tag: [