how to close tcp keep-alive for http.ListenAndServer

[orange-jacky]

What version of Go are you using (go version)?

$ go version
go version go1.14 darwin/amd64

Does this issue reproduce with the latest release?

yes

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
GO111MODULE="on"
GOARCH="amd64"
GOBIN="/Users/xx/Documents/develop/go/workspace/bin"
GOCACHE="/Users/xx/Library/Caches/go-build"
GOENV="/Users/xx/Library/Application Support/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOINSECURE=""
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/xx/Documents/develop/go/workspace"
GOPRIVATE=""
GOPROXY="direct"
GOROOT="/usr/local/go"
GOSUMDB="off"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/dev/null"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/7r/fpcvbc6d32j2lfls0lllcs240000gn/T/go-build785679791=/tmp/go-build -gno-record-gcc-switches -fno-common"
GOROOT/bin/go version: go version go1.14 darwin/amd64
GOROOT/bin/go tool compile -V: compile version go1.14
uname -v: Darwin Kernel Version 19.3.0: Thu Jan  9 20:58:23 PST 2020; root:xnu-6153.81.5~1/RELEASE_X86_64
ProductName:	Mac OS X
ProductVersion:	10.15.3
BuildVersion:	19D76
lldb --version: lldb-1100.0.30.12
Apple Swift version 5.1.3 (swiftlang-1100.0.282.1 clang-1100.0.33.15)

What did you do?

edit main.go

`package main

import (
"log"
"net/http"
)

func main() {
addr := "127.0.0.1:8080"
http.HandleFunc("/agent", agentHandler)

srv := http.Server{
	Addr: addr,
}
srv.SetKeepAlivesEnabled(false)

err := srv.ListenAndServe()
log.Fatal(err)

}

func agentHandler(w http.ResponseWriter, r *http.Request) {
}
`

in terminal1
go run main.go

in terminal2
telnet 127.0.0.1 8080

What did you expect to see?

http server not actively send a tcp keep-alive to client
or i can change time of send tcp keep-alive

What did you see instead?

every 15s, http server actively send a tcp keep-alive to client

[ianlancetaylor]

We generally do not use the issue tracker for questions. You will get better and faster answers on a forum. See https://golang.org/wiki/Questions. Thanks.

The srv.SetKeepAlivesEnabled method applies to HTTP keep-alives. What you are seeing is a different thing: TCP keep-alives. TCP keep-alives are controlled by methods like
https://golang.org/pkg/net/#TCPConn.SetKeepAlive. I'm not sure but I think you could probably set this by using ConnState in your http.Server. Asking on a forum may get better advice.