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Use iterative MD5 hashing.

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This commit is contained in:
John Kleint 2012-07-09 13:27:47 -04:00
parent 211f1e69c3
commit 375a1eaf43
4 changed files with 60 additions and 49 deletions
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26
lib/ansible/utils.py
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@ -33,11 +33,9 @@ except ImportError:
import simplejson as json
try:
import hashlib
HAVE_HASHLIB=True
from hashlib import md5 as _md5
except ImportError:
import md5
HAVE_HASHLIB=False
from md5 import md5 as _md5
from ansible import errors
import ansible.constants as C
@ -321,13 +319,19 @@ def parse_kv(args):
return options
def md5(filename):
''' compute md5sum, return None if file is not present '''
if not os.path.exists(filename):
return None
if HAVE_HASHLIB:
return hashlib.md5(file(filename).read()).hexdigest()
else:
return md5.new(file(filename).read()).hexdigest()
''' Return MD5 hex digest of local file, or None if file is not present. '''
if not os.path.exists(filename):
return None
digest = _md5()
blocksize = 64 * 1024
infile = open(filename, 'rb')
block = infile.read(blocksize)
while block:
digest.update(block)
block = infile.read(blocksize)
infile.close()
return digest.hexdigest()
####################################################################