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Merge pull request #3096 from phuibonhoa/master 

FileStore key_file_path does not properly limit filenames to 255 characters
This commit is contained in:
Santiago Pastorino 2011-09-22 10:03:54 -07:00
parent 43d27e9105 a0352a425f
commit 855184c468
2 changed files with 18 additions and 10 deletions
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17
activesupport/lib/active_support/cache/file_store.rb vendored
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@ -13,6 +13,7 @@ module ActiveSupport
attr_reader :cache_path
DIR_FORMATTER = "%03X"
FILENAME_MAX_SIZE = 230 # max filename size on file system is 255, minus room for timestamp and random characters appended by Tempfile (used by atomic write)
def initialize(cache_path, options = nil)
super(options)
@ -129,15 +130,13 @@ module ActiveSupport
hash, dir_1 = hash.divmod(0x1000)
dir_2 = hash.modulo(0x1000)
fname_paths = []
# Make sure file name is < 255 characters so it doesn't exceed file system limits.
if fname.size <= 255
fname_paths << fname
else
while fname.size <= 255
fname_path << fname[0, 255]
fname = fname[255, -1]
end
end
# Make sure file name doesn't exceed file system limits.
begin
fname_paths << fname[0...FILENAME_MAX_SIZE]
fname = fname[FILENAME_MAX_SIZE..-1]
end until fname.blank?
File.join(cache_path, DIR_FORMATTER % dir_1, DIR_FORMATTER % dir_2, *fname_paths)
end

11
activesupport/test/caching_test.rb
View File

@ -357,7 +357,7 @@ module CacheStoreBehavior
def test_really_long_keys
key = ""
1000.times{key << "x"}
900.times{key << "x"}
assert_equal true, @cache.write(key, "bar")
assert_equal "bar", @cache.read(key)
assert_equal "bar", @cache.fetch(key)
@ -557,6 +557,15 @@ class FileStoreTest < ActiveSupport::TestCase
key = @cache_with_pathname.send(:key_file_path, "views/index?id=1")
assert_equal "views/index?id=1", @cache_with_pathname.send(:file_path_key, key)
end
# Because file systems have a maximum filename size, filenames > max size should be split in to directories
# If filename is 'AAAAB', where max size is 4, the returned path should be AAAA/B
def test_key_transformation_max_filename_size
key = "#{'A' * ActiveSupport::Cache::FileStore::FILENAME_MAX_SIZE}B"
path = @cache.send(:key_file_path, key)
assert path.split('/').all? { |dir_name| dir_name.size <= ActiveSupport::Cache::FileStore::FILENAME_MAX_SIZE}
assert_equal 'B', File.basename(path)
end
end
class MemoryStoreTest < ActiveSupport::TestCase