Uncaught RuntimeException (with Slim4)

[anandasubas]

Request Headers:
Content-Type:"application/json"
cache-control:"no-cache"
Postman-Token:"7aa53299-d109-4574-9e5c-b8e6df3e4e0a"
Authorization:"Bearer eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImp0sssssssaSI6IjgxOGM5ZTY0LWQyZTktNGZjYy1iZjIyLWJmOWY5MmMxYjgxMCJ9.eyJpc3MiOiJ3d3cua2VuaW1hZGFsYS5jb20iLCJqdGkiOiI4MThjOWU2NC1kMmU5LTRmY2MtYmYyMi1iZjlmOTJjMWI4MTAiLCJpYXQiOjE1OTAxNTA5OTMsIm5iZiI6MTU5MDE1MDk5MywiZXhwIjoxNTkwMTY1MzkzLCJ1aWQiOiJsb2dpbiJ9.x8mtKaeRCURZ-B7wMdI_D86ZiZDn29n1TFjckwOaJ4L7mWz3MXDDItsqOkY8mTpgmiHhc-KgrrcBFGQica_G67hxV1F63_aAIe4rr4yDlha5pK28_c5VxEjeoOhRBmBWWYeWSC61sxNiOyAsA3fjFFC3fqtdtQC3KBl-T-sGFEYvpRJfEfc70be12QCppxkQpXY93HeqsZJS2hnf9l-raJexyQeVnJxUuqzG9BdZFtI3b7zcvY2qrYdeToN6FSWGUdJIea63Wfp2hOI_NUsqMAWbTOzTxPv3KILa9RR0eDxGivzBkkc7j1BWUZ-IypY1lXxSVFKXsIv1VhONWGU7nQ"
User-Agent:"PostmanRuntime/7.6.0"
Accept:"/"
Host:"slimapi.local"
accept-encoding:"gzip, deflate"
content-length:158
Request Body:
Response Headers:
Date:"Fri, 22 May 2020 13:05:24 GMT"
Server:"Apache/2.4.41 (Ubuntu)"
Vary:"Accept-Encoding"
Content-Encoding:"gzip"
Content-Length:"455"
Keep-Alive:"timeout=5, max=100"
Connection:"Keep-Alive"
Content-Type:"text/html; charset=UTF-8"

Response Body:


Fatal error: Uncaught RuntimeException: Error while decoding to JSON: Malformed UTF-8 characters, possibly incorrectly encoded in /var/www/slimapi/vendor/lcobucci/jwt/src/Parsing/Decoder.php:36
Stack trace:
#0 /var/www/slimapi/vendor/lcobucci/jwt/src/Parser.php(112): Lcobucci\JWT\Parsing\Decoder->jsonDecode()
#1 /var/www/slimapi/vendor/lcobucci/jwt/src/Parser.php(60): Lcobucci\JWT\Parser->parseHeader()
#2 /var/www/slimapi/src/Lib/JwtAuth.php(104): Lcobucci\JWT\Parser->parse()
#3 /var/www/slimapi/src/Lib/JwtAuth.php(115): App\Lib\JwtAuth->createParsedToken()
#4 /var/www/slimapi/src/Middleware/JwtMiddleware.php(45): App\Lib\JwtAuth->validateToken()
#5 /var/www/slimapi/vendor/slim/slim/Slim/MiddlewareDispatcher.php(188): App\Middleware\JwtMiddleware->process()
#6 /var/www/slimapi/vendor/slim/slim/Slim/Middleware/BodyParsingMiddleware.php(66): class@anonymous->handle()
#7 /var in /var/www/slimapi/vendor/lcobucci/jwt/src/Parsing/Decoder.php on line 36

[lcobucci]

@anandasubas you have a token with invalid JSON data on the headers: https://3v4l.org/1LPTf

How did you issue the token?

[lcobucci]

Closing as invalid since it's not really an issue of this library (feel free to comment btw).

[berndtja]

I got the same error.

RuntimeException: Error while decoding to JSON: Control character error, possibly incorrectly encoded in /var/www/phpinclude/vendor_composer/lcobucci/jwt/src/Parsing/Decoder.php:36
Stack trace:
#0 /var/www/phpinclude/vendor_composer/lcobucci/jwt/src/Parser.php(130): Lcobucci\JWT\Parsing\Decoder->jsonDecode('{"...')
#1 /var/www/phpinclude/vendor_composer/lcobucci/jwt/src/Parser.php(61): Lcobucci\JWT\Parser->parseClaims('...')

I sent the token by GET parameter. When I modified the token in the address bar of my browser randomly this error occurred.
Shouldn't the $token->validate() function catch this error and returns FALSE?

Or what can I do to prevent throwing the error?

[lcobucci]

@berndtja validation happens after parsing. If the library is throwing an exception during parsing is because it's unable to create a valid token object from the string.