常用方法?

import hashlib# 創建MD5對象，可以直接傳入要加密的數據 m = hashlib.md5('123456'.encode(encoding='utf-8')) # m = hashlib.md5(b'123456') 與上面等價 print(hashlib.md5('123456'.encode(encoding='utf-8')).hexdigest()) print(m) print(m.hexdigest()) # 轉化為16進制打印md5值

結果

<md5 HASH object @ 0x000001C67C71C8A0> e10adc3949ba59abbe56e057f20f883e

?

如果要被加密的數據太長，可以分段update, 結果是一樣的

import hashlibstr = 'This is a string.' m = hashlib.md5() m.update('This i'.encode('utf-8')) m.update('s a string.'.encode('utf-8')) print(m.hexdigest())

結果

13562b471182311b6eea8d241103e8f0

?

封裝成常用庫md5.py

#!/usr/bin/env python # -*- coding: utf-8 -*-import hashlibdef get_file_md5(file_name):"""計算文件的md5:param file_name::return:"""m = hashlib.md5() #創建md5對象with open(file_name,'rb') as fobj:while True:data = fobj.read(4096)if not data:breakm.update(data) #更新md5對象return m.hexdigest() #返回md5對象def get_str_md5(content):"""計算字符串md5:param content::return:"""m = hashlib.md5(content) #創建md5對象return m.hexdigest()

?

某源碼封裝

class Files(Storage):@staticmethoddef temp_put(content, path=None):"""Store a temporary file or files.@param content: the content of this file@param path: directory path to store the file"""fd, filepath = tempfile.mkstemp(prefix="upload_", dir=path or temppath())if hasattr(content, "read"):chunk = content.read(1024)while chunk:os.write(fd, chunk)chunk = content.read(1024)else:os.write(fd, content)os.close(fd)return filepath@staticmethoddef temp_named_put(content, filename, path=None):"""Store a named temporary file.@param content: the content of this file@param filename: filename that the file should have@param path: directory path to store the file@return: full path to the temporary file"""filename = Storage.get_filename_from_path(filename)#dirpath = tempfile.mkdtemp(dir=path or temppath())dirpath = temppath()Files.create(dirpath, filename, content)return os.path.join(dirpath, filename)@staticmethoddef create(root, filename, content):if isinstance(root, (tuple, list)):root = os.path.join(*root)filepath = os.path.join(root, filename)with open(filepath, "wb") as f:if hasattr(content, "read"):chunk = content.read(1024 * 1024)while chunk:f.write(chunk)chunk = content.read(1024 * 1024)else:f.write(content)return filepath@staticmethoddef copy(path_target, path_dest):"""Copy a file. The destination may be a directory.@param path_target: The@param path_dest: path_dest@return: path to the file or directory"""shutil.copy(src=path_target, dst=path_dest)return os.path.join(path_dest, os.path.basename(path_target))@staticmethoddef hash_file(method, filepath):"""Calculate a hash on a file by path.@param method: callable hashing method@param path: file path@return: computed hash string"""f = open(filepath, "rb")h = method()while True:buf = f.read(1024 * 1024)if not buf:breakh.update(buf)return h.hexdigest()@staticmethoddef md5_file(filepath):return Files.hash_file(hashlib.md5, filepath)@staticmethoddef sha1_file(filepath):return Files.hash_file(hashlib.sha1, filepath)@staticmethoddef sha256_file(filepath):return Files.hash_file(hashlib.sha256, filepath)

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