192 lines
5.9 KiB
Ruby
192 lines
5.9 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Utils
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extend self
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PathTraversalAttackError ||= Class.new(StandardError)
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# Ensure that the relative path will not traverse outside the base directory
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# We url decode the path to avoid passing invalid paths forward in url encoded format.
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# We are ok to pass some double encoded paths to File.open since they won't resolve.
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# Also see https://gitlab.com/gitlab-org/gitlab/-/merge_requests/24223#note_284122580
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# It also checks for ALT_SEPARATOR aka '\' (forward slash)
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def check_path_traversal!(path, allowed_absolute: false)
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path = CGI.unescape(path)
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if path.start_with?("..#{File::SEPARATOR}", "..#{File::ALT_SEPARATOR}") ||
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path.include?("#{File::SEPARATOR}..#{File::SEPARATOR}") ||
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path.end_with?("#{File::SEPARATOR}..") ||
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(!allowed_absolute && Pathname.new(path).absolute?)
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raise PathTraversalAttackError.new('Invalid path')
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end
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path
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end
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def force_utf8(str)
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str.dup.force_encoding(Encoding::UTF_8)
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end
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def ensure_utf8_size(str, bytes:)
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raise ArgumentError, 'Empty string provided!' if str.empty?
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raise ArgumentError, 'Negative string size provided!' if bytes.negative?
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truncated = str.each_char.each_with_object(+'') do |char, object|
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if object.bytesize + char.bytesize > bytes
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break object
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else
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object.concat(char)
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end
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end
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truncated + ('0' * (bytes - truncated.bytesize))
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end
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# Append path to host, making sure there's one single / in between
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def append_path(host, path)
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"#{host.to_s.sub(%r{\/+$}, '')}/#{path.to_s.sub(%r{^\/+}, '')}"
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end
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# A slugified version of the string, suitable for inclusion in URLs and
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# domain names. Rules:
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#
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# * Lowercased
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# * Anything not matching [a-z0-9-] is replaced with a -
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# * Maximum length is 63 bytes
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# * First/Last Character is not a hyphen
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def slugify(str)
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str.downcase
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.gsub(/[^a-z0-9]/, '-')[0..62]
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.gsub(/(\A-+|-+\z)/, '')
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end
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# Wraps ActiveSupport's Array#to_sentence to convert the given array to a
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# comma-separated sentence joined with localized 'or' Strings instead of 'and'.
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def to_exclusive_sentence(array)
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array.to_sentence(two_words_connector: _(' or '), last_word_connector: _(', or '))
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end
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# Converts newlines into HTML line break elements
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def nlbr(str)
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ActionView::Base.full_sanitizer.sanitize(+str, tags: []).gsub(/\r?\n/, '<br>').html_safe
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end
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def remove_line_breaks(str)
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str.gsub(/\r?\n/, '')
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end
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def to_boolean(value, default: nil)
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return value if [true, false].include?(value)
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return true if value =~ /^(true|t|yes|y|1|on)$/i
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return false if value =~ /^(false|f|no|n|0|off)$/i
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default
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end
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def boolean_to_yes_no(bool)
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if bool
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'Yes'
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else
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'No'
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end
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end
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def random_string
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Random.rand(Float::MAX.to_i).to_s(36)
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end
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# See: http://stackoverflow.com/questions/2108727/which-in-ruby-checking-if-program-exists-in-path-from-ruby
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# Cross-platform way of finding an executable in the $PATH.
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#
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# which('ruby') #=> /usr/bin/ruby
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def which(cmd, env = ENV)
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exts = env['PATHEXT'] ? env['PATHEXT'].split(';') : ['']
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env['PATH'].split(File::PATH_SEPARATOR).each do |path|
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exts.each do |ext|
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exe = File.join(path, "#{cmd}#{ext}")
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return exe if File.executable?(exe) && !File.directory?(exe)
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end
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end
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nil
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end
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def try_megabytes_to_bytes(size)
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Integer(size).megabytes
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rescue ArgumentError
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size
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end
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def bytes_to_megabytes(bytes)
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bytes.to_f / Numeric::MEGABYTE
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end
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def ms_to_round_sec(ms)
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(ms.to_f / 1000).round(6)
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end
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# Used in EE
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# Accepts either an Array or a String and returns an array
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def ensure_array_from_string(string_or_array)
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return string_or_array if string_or_array.is_a?(Array)
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string_or_array.split(',').map(&:strip)
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end
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def deep_indifferent_access(data)
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if data.is_a?(Array)
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data.map(&method(:deep_indifferent_access))
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elsif data.is_a?(Hash)
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data.with_indifferent_access
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else
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data
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end
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end
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def string_to_ip_object(str)
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return unless str
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IPAddr.new(str)
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rescue IPAddr::InvalidAddressError
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end
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# Converts a string to an Addressable::URI object.
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# If the string is not a valid URI, it returns nil.
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# Param uri_string should be a String object.
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# This method returns an Addressable::URI object or nil.
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def parse_url(uri_string)
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Addressable::URI.parse(uri_string)
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rescue Addressable::URI::InvalidURIError, TypeError
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end
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# Invert a hash, collecting all keys that map to a given value in an array.
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#
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# Unlike `Hash#invert`, where the last encountered pair wins, and which has the
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# type `Hash[k, v] => Hash[v, k]`, `multiple_key_invert` does not lose any
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# information, has the type `Hash[k, v] => Hash[v, Array[k]]`, and the original
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# hash can always be reconstructed.
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#
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# example:
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#
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# multiple_key_invert({ a: 1, b: 2, c: 1 })
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# # => { 1 => [:a, :c], 2 => [:b] }
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#
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def multiple_key_invert(hash)
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hash.flat_map { |k, v| Array.wrap(v).zip([k].cycle) }
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.group_by(&:first)
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.transform_values { |kvs| kvs.map(&:last) }
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end
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# This sort is stable (see https://en.wikipedia.org/wiki/Sorting_algorithm#Stability)
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# contrary to the bare Ruby sort_by method. Using just sort_by leads to
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# instability across different platforms (e.g., x86_64-linux and x86_64-darwin18)
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# which in turn leads to different sorting results for the equal elements across
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# these platforms.
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# This method uses a list item's original index position to break ties.
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def stable_sort_by(list)
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list.sort_by.with_index { |x, idx| [yield(x), idx] }
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end
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end
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end
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