{Profile} az login: Polish UnicodeDecodeError

[jiasli]

Description
Fix #12957, #7989
If the computer name or C:\Windows\System32\drivers\etc\hosts 127.0.0.1 entries contain international characters (Unicode), Azure CLI fails with a nasty error:

Exception in thread Thread-1:
Traceback (most recent call last):
  File "C:\Program Files (x86)\Microsoft SDKs\Azure\CLI2\lib\threading.py", line 916, in _bootstrap_inner
    self.run()
  File "C:\Program Files (x86)\Microsoft SDKs\Azure\CLI2\lib\threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Users\VSSADM~1\AppData\Local\Temp\pip-install-_1mlo87m\azure-cli-core\azure\cli\core\_profile.py", line 1200, in _get_authorization_code_worker
  File "C:\Program Files (x86)\Microsoft SDKs\Azure\CLI2\lib\socketserver.py", line 453, in __init__
    self.server_bind()
  File "C:\Program Files (x86)\Microsoft SDKs\Azure\CLI2\lib\http\server.py", line 138, in server_bind
    self.server_name = socket.getfqdn(host)
  File "C:\Program Files (x86)\Microsoft SDKs\Azure\CLI2\lib\socket.py", line 673, in getfqdn
    hostname, aliases, ipaddrs = gethostbyaddr(name)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xf8 in position 10: invalid start byte

Login failed

This PR refines the error message to:

Please make sure there is no international (Unicode) character in the computer name or C:\Windows\System32\drivers\etc\hosts file's 127.0.0.1 entries. For more details, please see #12957

Testing Guide
Change computer name to a Unicode string like 测试 or add 127.0.0.1 测试 to C:\Windows\System32\drivers\etc\hosts. Run az login.

[yonzhan]

add to S168

[arrownj]

Just curious about that if we actually have international character in the compute name, the only way to get it passed is to rename the compute name ?

[jiasli]

The link does have instructions about how to bypass it: #12957

But using Unicode as a computer name is always a bad idea.

[arrownj]

Got it.

[qianwens]

except UnicodeDecodeError: [](start = 8, length = 26)

make sure we handle this exception in MSAL too

[jiasli]

Sure.

[qianwens]