Hanging on 'Downloading library build "*" (might take a while)'

On the current master branch of mbed-cli:

mbed new simple_test --mbedlib 
[mbed] Working path "/home/arvoelke/git/..." (program)
[mbed] Creating new program "simple_test" (git)
[mbed] Adding library "mbed" from "https://mbed.org/users/mbed_official/code/mbed/builds" at branch/tag "tip"
[mbed] Downloading library build "65be27845400" (might take a while)

I've tried this three times now, each time keeping it open for more than 24 hours -- and it still hangs.

If I visit the above url (https://mbed.org/users/mbed_official/code/mbed/builds) and click on the first build (65be27845400), it takes me to an invalid page:

https://os.mbed.com/users/mbed_official/code/mbed//builds/65be27845400/

An error occurred while processing your request
no such method: builds

Note there are two slashes (//) in the URL. If I remove one of the slashes then the link becomes valid. Is there a fix or work-around? Thanks.

Did some checking around:

mbed-cli/mbed/mbed.py

Lines 393 to 400 in c2528f6

    
           action("Downloading library build \"%s\" (might take a while)" % rev) 
        
           inurl = urlopen(url) 
        
           with open(rev_file, 'wb') as outfd: 
        
               data = None 
        
               while data != '': 
        
                   # Download and write the data in 1 MB chunks 
        
                   data = inurl.read(1024 * 1024) 
        
                   outfd.write(data)

and noticed that the empty string check is an infinite loop in Python3 (since b'' != '').
Fixed in #969.

Internal Jira reference: https://jira.arm.com/browse/IOTBTOOL-648

For everyone still encountering this issue after 2022:

pip uninstall mbed-cli
git clone https://github.com/ARMmbed/mbed-cli.git
cd mbed-cli
pip install --editable .

edit mbed/mbed.py and change line 397 to:

while data != b'':

and line 294 to:

return stdout.decode("ANSI")

then you should be able to download the libraries

return stdout.decode("ANSI")

led to this error on my machine (Ubuntu 22.04):

ERROR: Unknown Error: unknown encoding: ANSI

so I changed it back to the original, then it worked successfully.

For everyone still encountering this issue after 2022:
pip uninstall mbed-cli
git clone https://github.com/ARMmbed/mbed-cli.git
cd mbed-cli
pip install --editable .
edit mbed/mbed.py and change line 397 to:
while data != b'':
and line 294 to:
return stdout.decode("ANSI")
then you should be able to download the libraries

This worked but without editing line 294 on Ubuntu (editing the line gave another error when creating the project). Thanks a lot, I have been going crazy over this

	action("Downloading library build \"%s\" (might take a while)" % rev)
	inurl = urlopen(url)
	with open(rev_file, 'wb') as outfd:
	data = None
	while data != '':
	# Download and write the data in 1 MB chunks
	data = inurl.read(1024 * 1024)
	outfd.write(data)