#===================================
# CODE LIB
# COD STRTOMD5 字符串计算MD5
def cod_str2md5(instr):
import
hashlib
umd5str=hashlib.md5(instr)
return
str(umd5str.hexdigest())
# COD FILETOMD5 计算文件的MD5
def cod_file2md5(filepathname):
import
hashlib
try:
umd5str=hashlib.md5()
#需要使用二进制格式读取文件内容
ufile =
open(unicode(filepathname,'utf8'), 'rb')
umd5str.update(ufile.read())
uoutstr=str(umd5str.hexdigest())
ufile.close()
return uoutstr
except:
return ''
def cod_str2crc32(instr):
m_pdwCrc32Table = [0 for x in range(0,256)]
dwPolynomial = 0xEDB88320;
dwCrc =
0
for i
in range(0,255):
dwCrc = i
for j in
[8,7,6,5,4,3,2,1]:
if dwCrc & 1:
dwCrc =
(dwCrc >> 1) ^ dwPolynomial
else:
dwCrc
>>= 1
m_pdwCrc32Table[i] =
dwCrc
dwCrc32
= 0xFFFFFFFFL
for i
in instr:
b = ord(i)
dwCrc32 = ((dwCrc32)
>> 8) ^ m_pdwCrc32Table[(b) ^
((dwCrc32) & 0x000000FF)]
dwCrc32
= dwCrc32 ^ 0xFFFFFFFFL
return
dwCrc32
def cod_str2crc32x(instr):
import
binascii
return
binascii.crc32(instr)
def cod_file2crc32(filepathname):
import
binascii
try:
uf =
open(unicode(filepathname,'utf8'),"rb")
ucrc =
binascii.crc32(uf.read())
uf.close()
if
ucrc>0:
uoutint=ucrc
else :
uoutint= ~ ucrc ^ 0xffffffff
return '%x' % (uoutint)
except:
return ''
#===================================
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