JSON Post

[u2]

wrk.method = "POST"
wrk.body   = '{"jsonrpc":"2.0","method":"cita_sendTransaction","params":["abcd"],"id":2}'
wrk.headers["Content-Type"] = "application/json"

Not support "application/json" post, it taken it as get method.

While I changed it to "application/x-www-form-urlencoded", the method is right.

[daodennis-zz]

Have you tried urlencoding the payload and seeing if that works?

[exAspArk]

Any updates on the issue?

Encoding the payload works fine for me but it will be nice to support headers other than application/x-www-form-urlencoded.

[turtleDev]

works fine on v4.0.2.2

[wg]

Thanks @turtleDev!

[jdhao]

Here is an example on how to post request as application/json, it works fine for me on wrk 4.2.0: https://stackoverflow.com/a/54457442/6064933.