关于Python对文件字节流数据的处理

读取文件的字节流数据，将其转换为十六进制数据

def read_file(): with open('./flag.zip','rb') as file_byte: file_hex = file_byte.read().hex() print(file_hex) write_file(file_hex) def write_file(file_hex): with open('new.txt','w') as new_file: new_file.write(file_hex) if __name__ == '__main__': read_file() 

读取文件的字节流数据，将其编码为base64并输出

import base64 def read_file(): with open('./flag.zip','rb') as file_byte: file_base64 = base64.b64encode(file_byte.read()) print(file_base64) if __name__ == '__main__': read_file()

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将十六进制文件转化为字节流文件写入

import struct a = open("str.txt","r")#十六进制数据文件 lines = a.read() res = [lines[i:i+2] for i in range(0,len(lines),2)] with open("xxx.xxx","wb") as f: for i in res: s = struct.pack('B',int(i,16)) f.write(s)

binascii.b2a_hex()、binascii.hexlify()：将字节类型字符串数据转换为十六进制数据

>>> import binascii >>> text=b'flag{MoChu7_Need_A_Girlfriend}' >>> binascii.b2a_hex(text) b'666c61677b4d6f436875375f4e6565645f415f4769726c667269656e647d' >>> binascii.hexlify(text) b'666c61677b4d6f436875375f4e6565645f415f4769726c667269656e647d' 

 

binascii.a2b_hex()、binascii.unhexlify()：将十六进制数据转换位字节类型字符串数据

>>> import binascii >>> hex_str='666c61677b4d6f436875375f4e6565645f415f4769726c667269656e647d' >>> binascii.a2b_hex(hex_str) b'flag{MoChu7_Need_A_Girlfriend}' >>> binascii.unhexlify(hex_str) b'flag{MoChu7_Need_A_Girlfriend}' 

 

import binascii with open('./xxx.xxx','r') as file: with open('xxx.xxx','wb') as write_file: write_file.write(binascii.unhexlify(file.read())) 

 

如果碰到是图片字节流的base64编码，可以在浏览器中使用

data:image/png;base64,这里添加base64字符串