java middleware with kafka out(json-format) miss req_boy

[Xiaolong Cao]

I am having a problem with goreplay version 1.3.2. When I used java middleware as a custom filter and exported to kafka, I found that the req_body was missing and I added a custom http header to the original message. here is the modified message after using java middleware

2 93941f900af407140afc1266 1686069659605231722 92821
HTTP/1.1 200 OK
transfer-encoding: chunked
X-TraceId: 840f302dbe741ea1
X-SpanId: 840f302dbe741ea1
Content-Type: application/json;charset=UTF-8
Date: Tue, 06 Jun 2023 16:40:59 GMT
X-Tenant-Id: 864f7539264b4c48993b997850737fc2

1b
{"data":[],"errorCode":"0"}
0


🐵🙈🙉

The http header X-Tenant-Id above is my custom addition，here are the messages in Kakfa

{
	"Req_URL": "",
	"Req_Type": "2",
	"Req_ID": "93941f900af407140afc1266",
	"Req_Ts": "1686069659605231722",
	"Req_Method": "HTTP/1.1",
	"Req_Headers": {
		"Content-Type": "application/json",
		"Date": "Tue, 06 Jun 2023 16:40:59 GMT",
		"Transfer-Encoding": "chunked",
		"X-Spanid": "840f302dbe741ea1",
		"X-Tenant-Id": "864f7539264b4c48993b997850737fc2",
		"X-Traceid": "840f302dbe741ea1"
	}
}

my Launch Script

./gor --input-raw :8080 --input-raw-track-response --middleware "java -jar goreplay-java.jar" --output-kafka-json-format --output-kafka-host 'ccf-uat-9-kafka-0.ccf-uat-9-kafka-headless.ccf-uat-9.svc.cluster.local:9092,ccf-uat-9-kafka-1.ccf-uat-9-kafka-headless.ccf-uat-9.svc.cluster.local:9092,ccf-uat-9-kafka-2.ccf-uat-9-kafka-headless.ccf-uat-9.svc.cluster.local:9092' --output-kafka-topic 'uat_gor'

Is this a bug or does goreplay do a checksum that doesn't allow modification of the original message? Thanks