CTF | bugku | 速度要快

检查源码时发现有

<!-- OK ,now you have to post the margin what you find -->

检查响应头发现有

flag: 6LeR55qE6L+Y5LiN6ZSZ77yM57uZ5L2gZmxhZ+WQpzogTWpZNE9USTU=

然后写代码爬网页

'''

@Modify Time      @Author

------------      -------    http://123.206.87.240:8002/web6/

2019/9/7 16:40   laoalo

'''

import requests

import base64

url='http://123.206.87.240:8002/web6/'

response = requests.session()

head = response.get(url=url).headers

str1 = base64.b64decode(head['flag'])

flag = base64.b64decode(repr(str1).split(':')[1])

# flag = base64.b64decode(head['flag']).decode('utf-8').split(':')[1]

# print(flag)

data = {'margin':flag}

key = response.post(url=url,data=data).text

print(key)

记一次错误的写法：

原因

flags = base64.b64decode(head['flag']).decode('utf-8').split(':')[1]  # 将flag从respond解析出来，结果是str.

flag = base64.b64decode(flags)  # 在post的时候也需要编码,原来的码缺这一步

repr() 函数将对象转化为供解释器读取的形式。返回值：string 参数：object

'''

@Modify Time      @Author

------------      -------    http://123.206.87.240:8002/web6/

2019/9/7 16:40   laoalo

'''

import requests

import base64

url='http://123.206.87.240:8002/web6/'

response = requests.session()

head = response.get(url=url).headers

# str1 = base64.b64decode(head['flag'])

#

# print("答案的：",repr(str1).split(':')[1],type(repr(str1).split(':')[1]))

# print("我的：",base64.b64decode(head['flag']).decode('utf-8').split(':')[1])

#

# flag = base64.b64decode(repr(str1).split(':')[1])

# print(flag)

flags = base64.b64decode(head['flag']).decode('utf-8').split(':')[1]  # 将flag从respond解析出来，结果是str.

flag = base64.b64decode(flags)  # 在post的时候也需要上传

print(flag)

data = {'margin':flag}

key = response.post(url=url,data=data).text

print(key)

修改后

巴特西

CTF | bugku | 速度要快

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