Allow smb:// links in Markdown text.

app/helpers/gitlab_markdown_helper.rb

@@ -119,7 +119,7 @@ module GitlabMarkdownHelper
   end
 
   def ignored_protocols
-    ["http://","https://", "ftp://", "mailto:"]
+    ["http://","https://", "ftp://", "mailto:", "smb://"]
   end
 
   def rebuild_path(file_path)

config/application.rb

@@ -50,6 +50,8 @@ module Gitlab
     # Version of your assets, change this if you want to expire all your assets
     config.assets.version = '1.0'
 
+    config.action_view.sanitized_allowed_protocols = %w(smb)
+
     # Relative url support
     # Uncomment and customize the last line to run in a non-root path
     # WARNING: We recommend creating a FQDN to host GitLab in a root path instead of this.

lib/redcarpet/render/gitlab_html.rb

@@ -10,6 +10,12 @@ class Redcarpet::Render::GitlabHTML < Redcarpet::Render::HTML
     super options
   end
 
+  def preprocess(full_document)
+    # Redcarpet doesn't allow SMB links when `safe_links_only` is enabled.
+    # FTP links are allowed, so we trick Redcarpet.
+    full_document.gsub("smb://", "ftp://smb:")
+  end
+
   # If project has issue number 39, apostrophe will be linked in
   # regular text to the issue as Redcarpet will convert apostrophe to
   # #39;
@@ -54,6 +60,8 @@ class Redcarpet::Render::GitlabHTML < Redcarpet::Render::HTML
   end
 
   def postprocess(full_document)
+    full_document.gsub!("ftp://smb:", "smb://")
+
     full_document.gsub!("&rsquo;", "'")
     unless @template.instance_variable_get("@project_wiki") || @project.nil?
       full_document = h.create_relative_links(full_document)