/ui/keywords stopped supporting OPTIONS

[paulftw]

/ui/keywords is an ancient API that Ratel uses to obtain the list of supported tokens for content assist.

It has stopped responding to HTTP OPTIONS in the 2.0 branch:

paul ratel 𝝺 curl -X OPTIONS http://localhost:8080/ui/keywords  -v
*   Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 8080 (#0)
> OPTIONS /ui/keywords HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.54.0
> Accept: */*
>
< HTTP/1.1 400 Bad Request
< Access-Control-Allow-Credentials: true
< Access-Control-Allow-Headers: X-Dgraph-AccessToken, Content-Type, Content-Length, Accept-Encoding, Cache-Control, X-CSRF-Token, X-Auth-Token, X-Requested-With
< Access-Control-Allow-Methods: POST, OPTIONS
< Access-Control-Allow-Origin: *
< Connection: close
< Content-Type: text/plain; charset=utf-8
< X-Content-Type-Options: nosniff
< Date: Tue, 17 Mar 2020 14:40:03 GMT
< Content-Length: 19
<
ErrorInvalidMethod
* Closing connection 0

I'm using the up-to-date dgraph:master docker image:

zero1_1   | Dgraph version   : v2.0.0-rc1-90-g4e3c1416
zero1_1   | Dgraph SHA-256   : 4de83d86237e62903a050add6b5d48207462256d6be2a166760bdd1fca77bb4c
zero1_1   | Commit SHA-1     : 4e3c1416
zero1_1   | Commit timestamp : 2020-03-17 16:34:09 +0530
zero1_1   | Branch           : master

[abhimanyusinghgaur]

It seems this commit cea0622#diff-d613c471a91cdfa86e5b06ed7b56a0b4 introduced way before v1.0.0 restricted /ui/keywords to only GET method.