FEATURE: consider SVG as an image when authorized

app/assets/javascripts/discourse/lib/utilities.js

@@ -269,7 +269,7 @@ Discourse.Utilities = {
     @param {String} path The path
   **/
   isAnImage: function(path) {
-    return (/\.(png|jpg|jpeg|gif|bmp|tif|tiff)$/i).test(path);
+    return (/\.(png|jpg|jpeg|gif|bmp|tif|tiff|svg|webp)$/i).test(path);
   },
 
   /**
@@ -279,7 +279,7 @@ Discourse.Utilities = {
   **/
   allowsAttachments: function() {
     return Discourse.Utilities.authorizesAllExtensions() ||
-           !(/((png|jpg|jpeg|gif|bmp|tif|tiff)(,\s)?)+$/i).test(Discourse.Utilities.authorizedExtensions());
+           !(/((png|jpg|jpeg|gif|bmp|tif|tiff|svg|webp)(,\s)?)+$/i).test(Discourse.Utilities.authorizedExtensions());
   },
 
   displayErrorForUpload: function(data) {

app/models/optimized_image.rb

@@ -31,9 +31,16 @@ class OptimizedImage < ActiveRecord::Base
         extension = File.extname(original_path)
         temp_file = Tempfile.new(["discourse-thumbnail", extension])
         temp_path = temp_file.path
-        original_path += "[0]" unless opts[:allow_animation]
 
-        if resize(original_path, temp_path, width, height)
+        if extension =~ /\.svg$/i
+          FileUtils.cp(original_path, temp_path)
+          resized = true
+        else
+          original_path << "[0]" unless opts[:allow_animation]
+          resized = resize(original_path, temp_path, width, height)
+        end
+
+        if resized
           thumbnail = OptimizedImage.create!(
             upload_id: upload.id,
             sha1: Digest::SHA1.file(temp_path).hexdigest,

app/models/upload.rb

@@ -75,13 +75,24 @@ class Upload < ActiveRecord::Base
       # deal with width & height for images
       if FileHelper.is_image?(filename)
         begin
+          if filename =~ /\.svg$/i
+            svg = Nokogiri::XML(file).at_css("svg")
+            width, height = svg["width"].to_i, svg["height"].to_i
+            if width == 0 || height == 0
+              upload.errors.add(:base, I18n.t("upload.images.size_not_found"))
+            else
+              upload.width, upload.height = ImageSizer.resize(width, height)
+            end
+          else
             # fix orientation first
             Upload.fix_image_orientation(file.path)
             # retrieve image info
             image_info = FastImage.new(file, raise_on_failure: true)
               # compute image aspect ratio
             upload.width, upload.height = ImageSizer.resize(*image_info.size)
-          # make sure we're at the beginning of the file (FastImage moves the pointer)
+          end
+          # make sure we're at the beginning of the file
+          # (FastImage and Nokogiri move the pointer)
           file.rewind
         rescue FastImage::ImageFetchFailure
           upload.errors.add(:base, I18n.t("upload.images.fetch_failure"))

spec/fixtures/images/image.svg

@@ -0,0 +1,3 @@
+<svg width="100" height="50">
+  <text x="25" y="25">Discourse</text>
+</svg>

spec/models/upload_spec.rb

@@ -15,11 +15,15 @@ describe Upload do
   let(:user_id) { 1 }
   let(:url) { "http://domain.com" }
 
-  let(:image) { file_from_fixtures("logo.png") }
   let(:image_filename) { "logo.png" }
+  let(:image) { file_from_fixtures(image_filename) }
   let(:image_filesize) { File.size(image) }
   let(:image_sha1) { Digest::SHA1.file(image).hexdigest }
 
+  let(:image_svg_filename) { "image.svg" }
+  let(:image_svg) { file_from_fixtures(image_svg_filename) }
+  let(:image_svg_filesize) { File.size(image_svg) }
+
   let(:attachment_path) { __FILE__ }
   let(:attachment) { File.new(attachment_path) }
   let(:attachment_filename) { File.basename(attachment_path) }
@@ -96,6 +100,27 @@ describe Upload do
       upload.url.should == url
     end
 
+    context "when svg is authorized" do
+
+      before { SiteSetting.stubs(:authorized_extensions).returns("svg") }
+
+      it "consider SVG as an image" do
+        store = {}
+        Discourse.expects(:store).returns(store)
+        store.expects(:store_upload).returns(url)
+
+        upload = Upload.create_for(user_id, image_svg, image_svg_filename, image_svg_filesize)
+
+        upload.user_id.should == user_id
+        upload.original_filename.should == image_svg_filename
+        upload.filesize.should == image_svg_filesize
+        upload.width.should == 100
+        upload.height.should == 50
+        upload.url.should == url
+      end
+
+    end
+
   end
 
   context ".get_from_url" do