Download raw files through the API

lib/api/files.rb

@@ -81,6 +81,42 @@ module API
         end
       end
+      # Get file from repository
+      # File content is Base64 encoded
+      #
+      # Parameters:
+      #   file_path (required) - The path to the file. Ex. lib/class.rb
+      #   ref (required) - The name of branch, tag or commit
+      #
+      # Example Request:
+      #   GET /projects/:id/repository/files/raw
+      #
+      get ":id/repository/files/raw" do
+        authorize! :download_code, user_project
+
+        required_attributes! [:file_path, :ref]
+        attrs = attributes_for_keys [:file_path, :ref]
+        ref       = attrs.delete(:ref)
+        file_path = attrs.delete(:file_path)
+
+        commit = user_project.commit(ref)
+        not_found! 'Commit' unless commit
+
+        repo = user_project.repository
+        blob = repo.blob_at(commit.sha, file_path)
+
+        if blob
+          content_type "application/octet-stream"
+          header['Content-Disposition'] = "attachment; filename=#{blob.name}"
+          env['api.format'] = :binary
+
+          blob.load_all_data!(repo)
+          blob.data
+        else
+          not_found! 'File'
+        end
+      end
+
       # Create new file in repository
       #
       # Parameters:

spec/requests/api/files_spec.rb

@@ -39,6 +39,19 @@ describe API::API, api: true  do
     end
   end
+  describe "GET /projects/:id/repository/files/raw" do
+    it "only returns the blob" do
+      params = {
+        file_path: "CONTRIBUTING.md", # big enough to hit #load_all_data!
+        ref: 'master',
+      }
+
+      get api("/projects/#{project.id}/repository/files/raw", user), params
+      expect(response.status).to eq(200)
+      expect(response.body).to match /shell_commands\.md\)\n\z/
+    end
+  end
+
   describe "POST /projects/:id/repository/files" do
     let(:valid_params) do
       {