bug: 当服务端不返回content-length时，网关输出的access中，response-length为-1

[dongsoft]

Current Behavior

错误的返回响应体大小为-1

Expected Behavior

应当为实际的响应体大小

Error Logs

![Uploading image.png…]()

Steps to Reproduce

1

Environment

Apinto version: 2024032714-
Golang version: go version go1.19.13 linux/amd64
Git commit hash:
Built on: 2024-03-27T06:50:19Z
Built by: gitlab
Built by eosc version: v0.16.1

[dongsoft]

"response": [
"$response_header",
"$response_body",
"$response_length",
"$length"
],