json rpc over curl

You are missing header "Accept: application/json". The server refuses
to reply unless the client explicitly accepts application/json.

BTW, curl is better. It understands SNI like other modern browsers and
doesn't need to ignore the SSL certificate check:

  $ curl -H 'Content-Type: application/json' -H 'Accept:
application/json' --data


'{"jsonrpc":"2.0","method":"allQueryNext","params":["status:open","z",25],"id":1}'
https://gerrit-review.googlesource.com/gerrit/rpc/ChangeListService
  {"jsonrpc":"2.0","id":1,"result":{"accounts":{"accounts":[{"id":1003378},...