在 Python 请求中使用 cookies.txt 文件

Question

我正在尝试使用带有 Python 请求的cookies.txt<\/code>文件（使用 Chrome 扩展程序生成）访问经过身份验证的站点：

import requests, cookielib

cj = cookielib.MozillaCookieJar('cookies.txt')
cj.load()
r = requests.get(url, cookies=cj)

Answer 1

MozillaCookieJar inherits from FileCookieJar which has the following docstring in its constructor:

Cookies are NOT loaded from the named file until either the .load() or
.revert() method is called.

You need to call .load() method then.

Also, like Jermaine Xu noted the first line of the file needs to contain either # Netscape HTTP Cookie File or # HTTP Cookie File string. Files generated by the plugin you use do not contain such a string so you have to insert it yourself. I raised appropriate bug at http://code.google.com/p/cookie-txt-export/issues/detail?id=5

EDIT

Session cookies are saved with 0 in the 5th column. If you don't pass ignore_expires=True to load() method all such cookies are discarded when loading from a file.

File session_cookie.txt :

# Netscape HTTP Cookie File
.domain.com TRUE    /   FALSE   0   name    value

Python script:

import cookielib

cj = cookielib.MozillaCookieJar('session_cookie.txt')
cj.load()
print len(cj)

Output: 0

EDIT 2

Although we managed to get cookies into the jar above they are subsequently discarded by cookielib because they still have 0 value in the expires attribute. To prevent this we have to set the expire time to some future time like so:

for cookie in cj:
    # set cookie expire date to 14 days from now
    cookie.expires = time.time() + 14 * 24 * 3600

EDIT 3

I checked both wget and curl and both use 0 expiry time to denote session cookies which means it's the de facto standard. However Python's implementation uses empty string for the same purpose hence the problem raised in the question. I think Python's behavior in this regard should be in line with what wget and curl do and that's why I raised the bug at http://bugs.python.org/issue17164
I'll note that replacing 0 s with empty strings in the 5th column of the input file and passing ignore_discard=True to load() is the alternate way of solving the problem (no need to change expiry time in this case).

Answer 2

I tried taking into account everything that Piotr Dobrogost had valiantly figured out about MozillaCookieJar but to no avail. I got fed up and just parsed the damn cookies.txt myself and now all is well:

import re
import requests

def parseCookieFile(cookiefile):
    """Parse a cookies.txt file and return a dictionary of key value pairs
    compatible with requests."""

    cookies = {}
    with open (cookiefile, 'r') as fp:
        for line in fp:
            if not re.match(r'^\#', line):
                lineFields = line.strip().split('\t')
                cookies[lineFields[5]] = lineFields[6]
    return cookies

cookies = parseCookieFile('cookies.txt')

import pprint
pprint.pprint(cookies)

r = requests.get('https://example.com', cookies=cookies)

Answer 3

This worked for me:

from http.cookiejar import MozillaCookieJar
from pathlib import Path
import requests

cookies = Path('/Users/name/cookies.txt')
jar = MozillaCookieJar(cookies)
jar.load()
requests.get('https://path.to.site.com', cookies=jar)
<Response [200]>

Answer 4

I tried editing Tristan answer to add some info to it but it seems SO edit q is full therefore, I am writing this answer, since, I have struggled real bad on using existing cookies with python request.

1. First, get the cookies from the Chrome. Easiest way would be to use an extension called 'cookies.txt'

https://chrome.google.com/webstore/detail/get-cookiestxt/bgaddhkoddajcdgocldbbfleckgcbcid/related

2. After downloading those cookies, use the below code to make sure that you are able to parse the file without any issues.

    import re
    import requests
    
    def parseCookieFile(cookiefile):
        """Parse a cookies.txt file and return a dictionary of key value pairs
        compatible with requests."""
    
        cookies = {}
        with open (cookiefile, 'r') as fp:
            for line in fp:
                if not re.match(r'^\#', line):
                    lineFields = line.strip().split('\t')
                    if len(lineFields) > 2:
                        try:
                            cookies[lineFields[5]] = lineFields[6]
                        except:
                            pass
        return cookies
    
    cookies = parseCookieFile('cookies.txt') #replace the filename
    
    import pprint
    pprint.pprint(cookies)

3. Next, use those cookies with python request

x = requests.get('your__url', verify=False, cookies=cookies)
print (x.content)

This should save your day from going on different SO posts and trying those cookielib and other methods which never worked for me.

Answer 5

I finally found a way to make it work (I got the idea by looking at curl 's verbose ouput): instead of loading my cookies from a file, I simply created a dict with the required value/name pairs:

cd = {'v1': 'n1', 'v2': 'n2'}
r = requests.get(url, cookies=cd)

and it worked (although it doesn't explain why the previous method didn't). Thanks for all the help, it's really appreciated.