109 lines
3 KiB
Ruby
109 lines
3 KiB
Ruby
# frozen_string_literal: true
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class HelpController < ApplicationController
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skip_before_action :authenticate_user!
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layout 'help'
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# Taken from Jekyll
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# https://github.com/jekyll/jekyll/blob/3.5-stable/lib/jekyll/document.rb#L13
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YAML_FRONT_MATTER_REGEXP = /\A(---\s*\n.*?\n?)^((---|\.\.\.)\s*$\n?)/m
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def index
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# Remove YAML frontmatter so that it doesn't look weird
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@help_index = File.read(Rails.root.join('doc', 'README.md')).sub(YAML_FRONT_MATTER_REGEXP, '')
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# Prefix Markdown links with `help/` unless they are external links.
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# '//' not necessarily part of URL, e.g., mailto:mail@example.com
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# See https://rubular.com/r/DFHZl5w8d3bpzV
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@help_index.gsub!(%r{(?<delim>\]\()(?!\w+:)(?!/)(?<link>[^\)\(]+\))}) do
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"#{$~[:delim]}#{Gitlab.config.gitlab.relative_url_root}/help/#{$~[:link]}"
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end
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end
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def show
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@path = clean_path_info(path_params[:path])
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respond_to do |format|
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format.any(:markdown, :md, :html) do
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# Note: We are purposefully NOT using `Rails.root.join`
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path = File.join(Rails.root, 'doc', "#{@path}.md")
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if File.exist?(path)
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# Remove YAML frontmatter so that it doesn't look weird
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@markdown = File.read(path).gsub(YAML_FRONT_MATTER_REGEXP, '')
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render 'show.html.haml'
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else
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# Force template to Haml
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render 'errors/not_found.html.haml', layout: 'errors', status: 404
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end
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end
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# Allow access to images in the doc folder
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format.any(:png, :gif, :jpeg, :mp4) do
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# Note: We are purposefully NOT using `Rails.root.join`
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path = File.join(Rails.root, 'doc', "#{@path}.#{params[:format]}")
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if File.exist?(path)
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send_file(path, disposition: 'inline')
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else
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head :not_found
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end
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end
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# Any other format we don't recognize, just respond 404
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format.any { head :not_found }
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end
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end
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def shortcuts
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end
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def instance_configuration
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@instance_configuration = InstanceConfiguration.new
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end
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def ui
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@user = User.new(id: 0, name: 'John Doe', username: '@johndoe')
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end
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private
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def path_params
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params.require(:path)
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params
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end
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PATH_SEPS = Regexp.union(*[::File::SEPARATOR, ::File::ALT_SEPARATOR].compact)
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# Taken from ActionDispatch::FileHandler
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# Cleans up the path, to prevent directory traversal outside the doc folder.
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def clean_path_info(path_info)
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parts = path_info.split(PATH_SEPS)
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clean = []
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# Walk over each part of the path
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parts.each do |part|
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# Turn `one//two` or `one/./two` into `one/two`.
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next if part.empty? || part == '.'
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if part == '..'
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# Turn `one/two/../` into `one`
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clean.pop
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else
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# Add simple folder names to the clean path.
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clean << part
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end
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end
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# If the path was an absolute path (i.e. `/` or `/one/two`),
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# add `/` to the front of the clean path.
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clean.unshift '/' if parts.empty? || parts.first.empty?
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# Join all the clean path parts by the path separator.
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::File.join(*clean)
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end
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end
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