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Versions: 11
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Contents
module NdrError
# Mixin to help with fuzzing of exception messages/traces.
module Fuzzing
def fuzz(description, backtrace, parent_print = nil)
Digest::MD5.hexdigest([
fuzz_description(description),
fuzz_backtrace(backtrace),
parent_print
].compact.join)
end
private
# Prepare a fuzzed description:
def fuzz_description(description)
# Apply the fuzzers sequentially:
NdrError.description_fuzzers.inject(description) { |a, e| e.call(a) }
end
# Fuzz a backtrace:
# * independent of deployment paths
# * independent of line numbers
def fuzz_backtrace(backtrace)
backtrace.map { |line| fuzz_line(line) }.join("\n")
end
def fuzz_line(line)
line = line.sub(Rails.root.to_s, 'Rails.root')
# Remove gem version numbers from backtrace
line.sub!(Regexp.new('/gems/([^/]*-)[0-9][0-9.]*/'), '/gems/\1/')
# Remove GEM_PATH / LOAD_PATH differences:
sub_paths!(line)
# Remove Rails compiled callback & template identifiers:
line.gsub!(Regexp.new('___?[0-9][0-9_]*[0-9]'), '__COMPILED_ID')
# Remove line numbers:
line.gsub!(/:(\d+):/, '')
line
end
def sub_paths!(line)
Gem.path.each do |path|
line.sub!(Regexp.new('^' + Regexp.escape(path)), 'Gem.path')
end
$LOAD_PATH.each do |path|
line.sub!(Regexp.new('^' + Regexp.escape(path)), '$LOAD_PATH')
end
end
end
end
Version data entries
11 entries across 11 versions & 1 rubygems