Bas64 encoding bug when using JWT service

[Flo Baum]

I'm using the chat integration like described here: https://html5-chat.com/blog/jwt-a-quicker-and-simpler-version-using-the-html5-service/

Whih works fine for some users and some not.

Now I found out why:

I'm creating my data structure like this

$json = json_encode(array('username'=>'myUsername', 'password'=>'myChatAccountPassword', 'gender'=>'male', 'role'=>'user', 
'image'=>base64_encode('https://html5-chat.com/img/malecostume.svg'), 'profile'=>'https://monsite.com/profile/myUserername'));

Than before sending it to the JWT service I have to bas64 encode it.

BUT the bas64 coding also uses the / character. And for some users the Base64 encoded string has a / in it. 

And here the problem begin.

As this created string is part of the URL the JWT service does not get the complete encoded string. 

$encoded = file_get_contents("https://jwt.html5-chat.com/protect/".base64_encode($json));

for Example:

the Base 64 encoded string looks something like "sfeDf/fdsafsaw234"

the JWT URL is:

https://jwt.html5-chat.com/protect/sfeDf/fdsafsaw234

In this case the JWT service does not return the Token. It returns the follwoing error message

Array
(
    [0] => sfeDf
    [1] => fdsafsaw234
)

Bad count parameter:2

For using base64 encoded strings in a URL there is workaround to replace the / 

like this:

function base64url_encode($data) { 

 return rtrim(strtr(base64_encode($data), '+/', '-_'), '='); 

}

But of course than the JWT service is not working

Does anybody know how to use the JWT service so that it's really working .....