example/platform/return.php: ../keys.php: failed to open stream (file does not exist)

[hanleybrand]

Trying to get the example apps up and running, example isn't working because a file is missing (/example/keys.php) - calls to example/platform/return.php result in following error:

Warning: require_once(../keys.php): failed to open stream: No such file or directory in /srv/app/example/platform/return.php on line 2

Fatal error: require_once(): Failed opening required '../keys.php' (include_path='.:/usr/local/lib/php') in /srv/app/example/platform/return.php on line 2

(this is on a local machine after invoking docker-compose up --build

Is this a file that was meant to be created by the end user or is it just missing?

Creating example/keys.php and either creating a variable called $privateKey that does not contain a valid key (e.g. $privateKey = "blahblah";) or omitting that variable entirely will cause an error:

Warning: openssl_sign(): supplied key param cannot be coerced into a private key in /srv/app/lti/jwt/src/JWT.php on line 199

Fatal error: Uncaught DomainException: OpenSSL unable to sign data in /srv/app/lti/jwt/src/JWT.php:201 Stack trace: #0 /srv/app/lti/jwt/src/JWT.php(170): Firebase\JWT\JWT::sign('eyJ0eXAiOiJKV1Q...', 'blahblah', 'RS256') #1 /srv/app/example/platform/return.php(88): Firebase\JWT\JWT::encode(Array, 'blahblah', 'RS256', 'C_nvQUsUmo04et4...') #2 {main} thrown in /srv/app/lti/jwt/src/JWT.php on line 201
alternatively ... Firebase\JWT\JWT::encode(Array, NULL, 'RS256', ....

If the created keys.php does provide a valid key then the form POSTs to /example/platform/launch.php incorrectly (running via docker it attempts to post to http://localhost:9001/example/platform/launch.php rather than http://localhost:9001/example/launch.php) - if the form is corrected to action="../launch.php" it still doesn't work if $_REQUEST['state'] is null (this is probably fine for an example app tho)

[MartinLenord]

hmm, looks like the standard example is a bit out of date, i should probably remove it as it isn't as helpful as the other example. Have you tried the game_example launch, you may have better luck with that one