Udemy-dl: 400 Bad Request

[pigullino1975]

From today, I stop downloading the courses.
I have tried many times without success ...

[smart-lemon]

Same here, I get this and also in the next try the error 429 (Too many requests).

[r0oth3x49]

you can use cookies based authentication until i fix the issue.

[vherasme]

you can use cookies based authentication until i fix the issue.

This works. I am downloading one of my courses. I understand they might be worried about piracy, and so they're blocking automatic downloads, but if you own a course you must have the right to download it

[kamalhm]

how can I get my cookies?

it's actually on the readme. Sorry.

The command becomes

python udemy-dl.py [courselink] -k [yourcookiesfile.txt]

[imVinayPandya]

cookie is also not working for me

[jmishal]

Same here, even with cookie not working.

[smart-lemon]

Cookies work fine for me 🍪

[chrisjunlee]

Cookies Workaround

Cookies do work, but the cookie parser is very fragile with no documentation and no debug output.

So I stepped through the source code and studied the logic.

Make a text file (cookie.txt) with this exact format:

Cookie: access_token=youraccesstokenvalue client_id=yourclientid

You need the "Cookie:" tag, space separators, '=' delimiter, and absolutely no line breaks.

Use the cookie switch: --cookie=cookie.txt

To get the actual values, you can use a cookie chrome extension.

[jmishal]

Cookies Workaround

Cookies do work, but the cookie parser is very fragile with no documentation and no debug output.

So I stepped through the source code and studied the logic.

Make a text file (cookie.txt) with this exact format:

Cookie: access_token=youraccesstokenvalue client_id=yourclientid

You need the "Cookie:" tag, space separators, '=' delimiter, and absolutely no line breaks.

Use the cookie switch: --cookie=cookie.txt

To get the actual values, you can use a cookie chrome extension.

yes ,, this working with me :-)
thanks

[RamAhm]

Cookies Workaround

Cookies do work, but the cookie parser is very fragile with no documentation and no debug output.

So I stepped through the source code and studied the logic.

Make a text file (cookie.txt) with this exact format:

Cookie: access_token=youraccesstokenvalue client_id=yourclientid

You need the "Cookie:" tag, space separators, '=' delimiter, and absolutely no line breaks.

Use the cookie switch: --cookie=cookie.txt

To get the actual values, you can use a cookie chrome extension.

Traceback (most recent call last):
File "C:\udemy-dl-master\udemy-dl.py", line 1443, in
main()
File "C:\udemy-dl-master\udemy-dl.py", line 952, in main
f_in = open(options.cookies)
FileNotFoundError: [Errno 2] No such file or directory: 'cookie.txt'

I still get this problem,
please how can I fix it
and is there any short video tutorial about cookies based authentication ?

[prateekdaniels]

Cookies Workaround

Cookies do work, but the cookie parser is very fragile with no documentation and no debug output.
So I stepped through the source code and studied the logic.
Make a text file (cookie.txt) with this exact format:

Cookie: access_token=youraccesstokenvalue client_id=yourclientid

You need the "Cookie:" tag, space separators, '=' delimiter, and absolutely no line breaks.
Use the cookie switch: --cookie=cookie.txt
To get the actual values, you can use a cookie chrome extension.

Traceback (most recent call last):
File "C:\udemy-dl-master\udemy-dl.py", line 1443, in
main()
File "C:\udemy-dl-master\udemy-dl.py", line 952, in main
f_in = open(options.cookies)
FileNotFoundError: [Errno 2] No such file or directory: 'cookie.txt'

I still get this problem,
please how can I fix it
and is there any short video tutorial about cookies based authentication ?

Same issue with me

[queeup]

I think you should give exact location of cookie.txt

Example:

--cookie=/home/user/cookie.txt

[prateekdaniels]

I think you should give exact location of cookie.txt

Example:

--cookie=/home/user/cookie.txt

Have done that too, but doesnt work

[r0oth3x49]

I think you should give exact location of cookie.txt
Example:

--cookie=/home/user/cookie.txt

Have done that too, but doesnt work

i have already mention the guide to extract cookies via firefox & chrome in readme file. the error you are facing is user error and not related to the tool you can follow the guide on readme how to use the tool.

[imVinayPandya]

Hello @all i am firefox user and this is working for me
https://github.com/r0oth3x49/udemy-dl/issues/303#issuecomment-441345792

[jmishal]

since you used windows I guess need to used back slash for the paths instead of slash.

[anagnam]

Hello, @r0oth3x49 I hope this can be fixed soon. thanks and more power!

[varunchandak]

@anagnam This is solved by cookies. Please check the closed issues on how to do that. It's also present in the README.

[anagnam]

@varunchandak I don't think so. I've tried using cookies and it worked on the first 3 chapters. Then after that, a series of error occurs so the total 14 chapter course was not downloaded in full. only the first 3 chapters were downloaded and were not actually finished.

[jck4422]

I had same 400 issue, then used cookies and it works! had to fix #347 before.

[Eugenio-Liso]

Worked also for me. Thanks!

[Nashaatfarrag]

Cookies Workaround

Cookies do work, but the cookie parser is very fragile with no documentation and no debug output.
So I stepped through the source code and studied the logic.
Make a text file (cookie.txt) with this exact format:

Cookie: access_token=youraccesstokenvalue client_id=yourclientid

You need the "Cookie:" tag, space separators, '=' delimiter, and absolutely no line breaks.
Use the cookie switch: --cookie=cookie.txt
To get the actual values, you can use a cookie chrome extension.

yes ,, this working with me :-)
thanks

the file must name cookies not cookie

[prateekdaniels]

Thank @r0oth3x49! You're the champ !

[farukh2352]

Hello all.

I was able to create cookies, but latter it process failed.

[] : Trying to login using cookies ...
[+] : Logged in successfully.
[] : Downloading course information .. -Traceback (most recent call last):
File "udemy-dl.py", line 1432, in
main()
File "udemy-dl.py", line 1091, in main
udemy.course_download(path=options.output, quality=options.quality, unsafe=options.unsafe)
File "udemy-dl.py", line 425, in course_download
course = udemy.course(url=self.url, username=self.username, password=self.password, cookies=self.cookies)
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_udemy.py", line 38, in course
return Udemy(url, username, password, cookies, basic, callback)
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_internal.py", line 44, in __init__
super(InternUdemyCourse, self).__init__(args, *kwargs)
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_shared.py", line 63, in __init__
self._fetch_course()
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_internal.py", line 56, in _fetch_course
self._info = self._real_extract(self._url)
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_extract.py", line 584, in _real_extract
'subtitles' : self._extract_subtitles(tracks),
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_extract.py", line 382, in _extract_subtitles
lang = track.get('language') or track.get('srclang') or track.get('label') or track['locale'].get('locale').split('_')[0]
KeyError: 'locale'

Please let me know if I am doing something wrong.

[r0oth3x49]

Hello all.

I was able to create cookies, but latter it process failed.

[_] : Trying to login using cookies ... [+] : Logged in successfully. [_] : Downloading course information .. -Traceback (most recent call last):
File "udemy-dl.py", line 1432, in
main()
File "udemy-dl.py", line 1091, in main
udemy.course_download(path=options.output, quality=options.quality, unsafe=options.unsafe)
File "udemy-dl.py", line 425, in course_download
course = udemy.course(url=self.url, username=self.username, password=self.password, cookies=self.cookies)
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_udemy.py", line 38, in course
return Udemy(url, username, password, cookies, basic, callback)
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_internal.py", line 44, in init
super(InternUdemyCourse, self).init(args, kwargs)
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_shared.py", line 63, in *init
self._fetch_course()
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_internal.py", line 56, in _fetch_course
self._info = self._real_extract(self._url)
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_extract.py", line 584, in _real_extract
'subtitles' : self._extract_subtitles(tracks),
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_extract.py", line 382, in _extract_subtitles lang = track.get('language') or track.get('srclang') or track.get('label') or track['locale'].get('locale').split('_')[0]
KeyError: 'locale'

Please let me know if I am doing something wrong.

pull the repository. i have recently merged a patch request for this error.

[agisan]

Hi! I have the same error... and I try to fix it but I don't know how to do it.
Can you help me?

[farukh2352]

Hello all.

I was able to create cookies, but latter it process failed.

[_] : Trying to login using cookies ... [+] : Logged in successfully. [_] : Downloading course information .. -Traceback (most recent call last):
File "udemy-dl.py", line 1432, in
main()
File "udemy-dl.py", line 1091, in main
udemy.course_download(path=options.output, quality=options.quality, unsafe=options.unsafe)
File "udemy-dl.py", line 425, in course_download
course = udemy.course(url=self.url, username=self.username, password=self.password, cookies=self.cookies)
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_udemy.py", line 38, in course
return Udemy(url, username, password, cookies, basic, callback)
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_internal.py", line 44, in init
super(InternUdemyCourse, self).init(args, kwargs)
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_shared.py", line 63, in *init
self._fetch_course()
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_internal.py", line 56, in _fetch_course
self._info = self._real_extract(self._url)
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_extract.py", line 584, in _real_extract
'subtitles' : self._extract_subtitles(tracks),
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_extract.py", line 382, in _extract_subtitles lang = track.get('language') or track.get('srclang') or track.get('label') or track['locale'].get('locale').split('_')[0]
KeyError: 'locale'

Please let me know if I am doing something wrong.

Hello all.
I was able to create cookies, but latter it process failed.
[_] : Trying to login using cookies ... [+] : Logged in successfully. [_] : Downloading course information .. -Traceback (most recent call last):
File "udemy-dl.py", line 1432, in
main()
File "udemy-dl.py", line 1091, in main
udemy.course_download(path=options.output, quality=options.quality, unsafe=options.unsafe)
File "udemy-dl.py", line 425, in course_download
course = udemy.course(url=self.url, username=self.username, password=self.password, cookies=self.cookies)
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_udemy.py", line 38, in course
return Udemy(url, username, password, cookies, basic, callback)
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_internal.py", line 44, in init
super(InternUdemyCourse, self).init(args, kwargs)
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_shared.py", line 63, in *init
self._fetch_course()
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_internal.py", line 56, in _fetch_course
self._info = self._real_extract(self._url)
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_extract.py", line 584, in _real_extract
'subtitles' : self._extract_subtitles(tracks),
File "C:\Program Files (x86)\Python37-32\udemy-dl-master\udemy_extract.py", line 382, in _extract_subtitles lang = track.get('language') or track.get('srclang') or track.get('label') or track['locale'].get('locale').split('_')[0]
KeyError: 'locale'
Please let me know if I am doing something wrong.

pull the repository. i have recently merged a patch request for this error.

Thank you its working now :)

[jokumar]

I used the cookies , but still getting the same error

[farukh2352]

It seems that you are not using correct format of cookies

On Tue, Mar 26, 2019, 7:40 PM Joydip Kumar [e-mail] wrote:

I used the cookies , but still getting the same error

[image: Capture]
https://user-images.githubusercontent.com/7227769/55003737-d9f4c600-4fd0-11e9-8afa-e5a0ed2901a4.JPG

—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub
https://github.com/r0oth3x49/udemy-dl/issues/341#issuecomment-476661159,
or mute the thread
https://github.com/notifications/unsubscribe-auth/AulraWm-LNShTUBkx4fMcrfjcxDx12nKks5vaipHgaJpZM4bwK_E
.

[jokumar]

Hi

I am using the below in cookie.txt
Cookie: access_token=xxxxxxxxxxxxxxxxx client_id=xxxxxxxxxxxxxxxxxx

command :
python udemy-dl.py http://..... --cookie=cookies.txt

I was able to download couple of days back . but its not working from today . Not sure what could be the issue .

[farukh2352]

Try using instructions for cookies from author's documentation.

On Tue, Mar 26, 2019, 8:38 PM Joydip Kumar [e-mail] wrote:

Hi

I am using the below in cookie.txt
Cookie: access_token=xxxxxxxxxxxxxxxxx client_id=xxxxxxxxxxxxxxxxxx

command :
python udemy-dl.py http://..... --cookie=cookies.txt

—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub
https://github.com/r0oth3x49/udemy-dl/issues/341#issuecomment-476692835,
or mute the thread
https://github.com/notifications/unsubscribe-auth/AulraeIttOcEjjJqbqK4yKdlAxd5ruUmks5vajfngaJpZM4bwK_E
.

[devprojectid]

Cookies Workaround

Cookies do work, but the cookie parser is very fragile with no documentation and no debug output.

So I stepped through the source code and studied the logic.

Make a text file (cookie.txt) with this exact format:

Cookie: access_token=youraccesstokenvalue client_id=yourclientid

You need the "Cookie:" tag, space separators, '=' delimiter, and absolutely no line breaks.

Use the cookie switch: --cookie=cookie.txt

To get the actual values, you can use a cookie chrome extension.

holy shoot, this is works for me, thanks, i love you

[jokumar]

It seems that you are not using correct format of cookies
…
On Tue, Mar 26, 2019, 7:40 PM Joydip Kumar @.*> wrote: I used the cookies , but still getting the same error [image: Capture] https://user-images.githubusercontent.com/7227769/55003737-d9f4c600-4fd0-11e9-8afa-e5a0ed2901a4.JPG — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#341 (comment)>, or mute the thread https://github.com/notifications/unsubscribe-auth/AulraWm-LNShTUBkx4fMcrfjcxDx12nKks5vaipHgaJpZM4bwK_E .

Yes it works for me now . Thanks a lot . I was using a wrong cookie .

[mag2000]

I make the file cook2.txt and just saved the file with following.
Cookie: access_token=mytoken client_id=myclientid
then issue the command
python udemy-dl.py cours_url -k cook2.txt -u xxxx -p xxxxx -q 720
copy cookies in file by using cookies google extension

Thanks it is working fine for me

[ghost]

@mag2000 you don't need -u -p if you're using -k 😅

[dealvidit]

I can successfully login using the cookie method but now I get this weird error:

TypeError: 'NoneType' object is not subscriptable

I can also see that udemy recently changed their interface and also their links and thus the "/v4/content" style linking doesn's exist and redirects straight to "/lecture/NUMBER#overview". So is this related?

EDIT: I'm just stupid. It works now. Totally my bad.

[xcesaralejandro]

cookies worked for me, thanks

[Fidozx]

Cookies Workaround

Cookies do work, but the cookie parser is very fragile with no documentation and no debug output.

So I stepped through the source code and studied the logic.

Make a text file (cookie.txt) with this exact format:

Cookie: access_token=youraccesstokenvalue client_id=yourclientid

You need the "Cookie:" tag, space separators, '=' delimiter, and absolutely no line breaks.

Use the cookie switch: --cookie=cookie.txt

To get the actual values, you can use a cookie chrome extension.

It works for me! Many thanks!!!!!!! i love you too!

[markusmaresch]

Cookies Workaround

Cookies do work, but the cookie parser is very fragile with no documentation and no debug output.

So I stepped through the source code and studied the logic.

Make a text file (cookie.txt) with this exact format:

Cookie: access_token=youraccesstokenvalue client_id=yourclientid

You need the "Cookie:" tag, space separators, '=' delimiter, and absolutely no line breaks.

Use the cookie switch: --cookie=cookie.txt

To get the actual values, you can use a cookie chrome extension.

Worked for me as described as of 2019/04/01 (no joke !)

[ronkiwest]

@markusmaresch So what is the command format to download the course in windows? udemy-dl.py -u username -p password courseurl -k fullpathof cookie.txt?

[ronkiwest]

@chrisjunlee I tried your method , and i get

[] : Trying to login using cookies ...
[+] : Logged in successfully.
[] : Downloading course information .. -Traceback (most recent call last):
File "C:\Users\Lenovo\udemy-dl-master\udemy-dl.py", line 1441, in
main()
File "C:\Users\Lenovo\udemy-dl-master\udemy-dl.py", line 1095, in main
udemy.course_download(skip_captions=options.skip_captions, path=options.output, quality=options.quality, unsafe=options.unsafe)
File "C:\Users\Lenovo\udemy-dl-master\udemy-dl.py", line 436, in course_download
course = udemy.course(url=self.url, username=self.username, password=self.password, cookies=self.cookies)
File "C:\Users\Lenovo\udemy-dl-master\udemy_udemy.py", line 38, in course
return Udemy(url, username, password, cookies, basic, callback)
File "C:\Users\Lenovo\udemy-dl-master\udemy_internal.py", line 44, in __init__
super(InternUdemyCourse, self).__init__(args, *kwargs)
File "C:\Users\Lenovo\udemy-dl-master\udemy_shared.py", line 62, in __init__
self._fetch_course()
File "C:\Users\Lenovo\udemy-dl-master\udemy_internal.py", line 56, in _fetch_course
self._info = self._real_extract(self._url)
File "C:\Users\Lenovo\udemy-dl-master\udemy_extract.py", line 547, in _real_extract
'subtitles' : self._extract_subtitles(tracks),
File "C:\Users\Lenovo\udemy-dl-master\udemy_extract.py", line 345, in _extract_subtitles
lang = track.get('language') or track.get('srclang') or track.get('label') or track['locale'].get('locale').split('_')[0]
KeyError: 'locale'

C:\Users\Lenovo>

[ghost]

@ronkiwest your udemy-dl is old, clone again. if you login with cookie, you only need -k command and cookie.txt file

[ronkiwest]

@ronkiwest your udemy-dl is old, clone again. if you login with cookie, you only need -k command and cookie.txt file

Thanks @brundidge , updated udemy-dl , it worked.

[ipsgit2018]

how to get youraccesstokenvalue and yourclientid
for
Cookie: access_token=youraccesstokenvalue client_id=yourclientid

[ghost]

@ipsgit2018 Guide Extracting Cookies in README.md works fine, you can follow that.

[chrisjunlee]

Awesome. Glad I could help. Happy learning everyone :)

[huydhoang]

Cookies Workaround

Cookies do work, but the cookie parser is very fragile with no documentation and no debug output.

So I stepped through the source code and studied the logic.

Make a text file (cookie.txt) with this exact format:

Cookie: access_token=youraccesstokenvalue client_id=yourclientid

You need the "Cookie:" tag, space separators, '=' delimiter, and absolutely no line breaks.

Use the cookie switch: --cookie=cookie.txt

To get the actual values, you can use a cookie chrome extension.

Awesome. Glad I could help. Happy learning everyone :)

Really nice workaround. Working as of today :)

[ahmedbokhari7]

kindly tell me what is clientID and i have given this way in cookies.txt

[ahmedbokhari7]

how should i execute the command with cookies
i do this

[Fidozx]

kindly tell me what is clientID

First you need to extract the cookie and save it in a txt file. Then search client_id in this file, you will find something like client_id=joiz7896dfaioejnfoizuc8g879za8691rif9.

[ahmedbokhari7]

client_id
@Fidozx
how can i extract cookies ?
and what is access_token ?

[ghost]

@ahmedbokhari7 follow guide in readme : https://github.com/r0oth3x49/udemy-dl#extracting-cookies--request-headers

[ahmedbokhari7]

thanks :) its done

[ahmedbokhari7]

now i get this issue if i download with cookies

[ghost]

@ahmedbokhari7 Check your access_token, i think it's broken, maybe you added or deleted some characters by mistake, should be 40 chars. Make a new cookie file again is the best option.

[fdbiondi]

Cookies Workaround

Cookies do work, but the cookie parser is very fragile with no documentation and no debug output.

So I stepped through the source code and studied the logic.

Make a text file (cookie.txt) with this exact format:

Cookie: access_token=youraccesstokenvalue client_id=yourclientid

You need the "Cookie:" tag, space separators, '=' delimiter, and absolutely no line breaks.

Use the cookie switch: --cookie=cookie.txt

To get the actual values, you can use a cookie chrome extension.

Great! this work fine
thanks!

[wldsaad]

USING FIREFOX:

1. open udemy and go to your courses page.
2. right click and select "Inspect Element"
3. choose "Network" tab
4. right click on any get request and select "Copy > Copy as cURL"
5. save it in a text file e.g "cookie.txt"
6. put that text file with the main directory of "udemy-dl-master" folder
7. open CMD and run the following command:
   python udemy-dl.py COURSE_URL -k cookie.txt
   OR
   py udemy-dl.py COURSE_URL -k cookie.txt

[shubhamjain-tolexo]

now i get this issue if i download with cookies

Note that udemy changes access token after we select any course to view. When we login to udemy and select any course to view its videos, access token gets changed and thus becomes different from the one which is set when we have not selected any course. Thus you have to use the access token which is set after you have selected the course (same course which you have to download via command line)

[ghost]

@shubhamjain-tolexo no, it doesn't change at all, stay the same because it's just a random string to identify you between requests after login. Unless you change your password or expired after 1 month or you logged out

[shubhamjain-tolexo]

@shubhamjain-tolexo no, it doesn't change at all, stay the same because it's just a random string to identify you between requests after login. Unless you change your password or expired after 1 month or you logged out

But when i logged in, i took the access token value from the browser, then used it to download the course via command line, but i got error: Udemy Says : 403 Forbidden You do not have permission to perform this action. .... But when i select the course, the access token changed and when i used this new access token to download the course via command line, it worked.

[ghost]

@shubhamjain-tolexo I tried what you said but it doesn't change at all, i moved from course to course and it still the same. Maybe your cookie method has some bug in it.

[shubhamjain-tolexo]

Maybe, it has some bug. I am using chrome "edit this cookie" extension.

[ghost]

@shubhamjain-tolexo Here is my method: https://github.com/r0oth3x49/udemy-dl/issues/351#issuecomment-476936783

[shubhamjain-tolexo]

Wow! what a wonderful and step-by-step guide you have made. Well i checked again, but now i am also getting the same value for the access_token. Don't know how i get different values before? Maybe i have made some mistake before. Maybe i have copied value of some other key before. Not sure.

[MRDO5]

Cookies Workaround

Cookies do work, but the cookie parser is very fragile with no documentation and no debug output.

So I stepped through the source code and studied the logic.

Make a text file (cookie.txt) with this exact format:

Cookie: access_token=youraccesstokenvalue client_id=yourclientid

You need the "Cookie:" tag, space separators, '=' delimiter, and absolutely no line breaks.

Use the cookie switch: --cookie=cookie.txt

To get the actual values, you can use a cookie chrome extension.

THX it's help me to ))

[vnay07]

Cookies Workaround

Cookies do work, but the cookie parser is very fragile with no documentation and no debug output.
So I stepped through the source code and studied the logic.
Make a text file (cookie.txt) with this exact format:

Cookie: access_token=youraccesstokenvalue client_id=yourclientid

You need the "Cookie:" tag, space separators, '=' delimiter, and absolutely no line breaks.
Use the cookie switch: --cookie=cookie.txt
To get the actual values, you can use a cookie chrome extension.

Traceback (most recent call last):
File "C:\udemy-dl-master\udemy-dl.py", line 1443, in
main()
File "C:\udemy-dl-master\udemy-dl.py", line 952, in main
f_in = open(options.cookies)
FileNotFoundError: [Errno 2] No such file or directory: 'cookie.txt'

I still get this problem,
please how can I fix it
and is there any short video tutorial about cookies based authentication ?

the problem You guys are facing is you might are saving the name wrong like cookies.txt
save the file like cookies txt is the extension don't explicitly add (.txt) in the name
I was also stuck at this problem and now its solved.

[vnay07]

Look at this image. This is what i mean