Support validation "maxErrors" option #8013
Description
We faced an DoS attack which simply was exploiting invalid requests like
query AAA ($a:a, $a:a, $a:a, $a:a, $a:a, $a:a, $a:a, $a:a, ..... 1000 elems..., $a:a, ) { a }
query AAB ($b:b, $a:a, $a:a, $a:a, $a:a, $a:a, $a:a, $a:a, ..... 1000 elems..., $a:a, ) { a }
query AAC ($c:c, $a:a, $a:a, $a:a, $a:a, $a:a, $a:a, $a:a, ..... 1000 elems..., $a:a, ) { a }
It it produces huge latency and blocks other concurrent queries (NodeJS loop is blocked by validating and/or errors generating) which is the most crucial point.
Graphql validate function has an option to configure maxErrors and aborts the validation if it hits the limit.
Before (unlimited, maxErrors: undefined)
After (maxErrors: 10)
