Closed
Description
What version of Go are you using (go version)?
$ go version go version go1.12.7 windows/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 set GOARCH=amd64 set GOBIN= set GOCACHE=C:\Users\nicktikhonov\AppData\Local\go-build set GOEXE=.exe set GOFLAGS= set GOHOSTARCH=amd64 set GOHOSTOS=windows set GOOS=windows set GOPATH=... set GOPROXY= set GORACE= set GOROOT=c:\go set GOTMPDIR= set GOTOOLDIR=c:\go\pkg\tool\windows_amd64 set GCCGO=gccgo set CC=gcc set CXX=g++ set CGO_ENABLED=1 set GOMOD= set CGO_CFLAGS=-g -O2 set CGO_CPPFLAGS= set CGO_CXXFLAGS=-g -O2 set CGO_FFLAGS=-g -O2 set CGO_LDFLAGS=-g -O2 set PKG_CONFIG=pkg-config set GOGCCFLAGS=-m64 -mthreads -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=C:\Users\NICKTI~1\AppData\Local\Temp\go-build372822890=/tmp/go-build -gno-record-gcc-switches
What did you do?
Ran the following script. Before that, you can run
fsutil file createnew bigfile 8589934610
to generate a large file.
package main
import (
"context"
"fmt"
"io"
"io/ioutil"
"net/http"
"time"
)
// Create a random file in the same directory
// fsutil file createnew bigfile 8589934610
type indexHandler struct {
}
func (h *indexHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
http.ServeFile(w, r, "bigfile")
}
func main() {
fmt.Println("Starting server....")
httpServer := &http.Server{Addr: fmt.Sprintf("%v:%v", "localhost", "8080"), Handler: &indexHandler{}}
go func() {
err := httpServer.ListenAndServe()
if err != nil {
fmt.Println("Err from server")
fmt.Println(err)
}
}()
time.Sleep(5 * time.Second)
fmt.Println("Starting client....")
client := &http.Client{}
req, err := http.NewRequest("GET", "http://localhost:8080/", nil)
req.Header.Add("Connection", "Keep-Alive")
req.Header.Add("Keep-Alive", "timeout=1000")
res, err := client.Do(req)
if err != nil {
panic(err)
}
fmt.Println(req)
totalLen := uint64(res.ContentLength)
bodyReader := res.Body
fmt.Printf("totalLen: %v\n", totalLen)
written, err := io.Copy(ioutil.Discard, bodyReader)
fmt.Printf("downloaded: %v\n", written)
fmt.Printf("err: %v\n", err)
httpServer.Shutdown(context.Background())
}
What did you expect to see?
I expected the download to have finished,
What did you see instead?
Instead, only 18 bytes are downloaded, and the client receives an unexpected EOF
totalLen: 8589934610
downloaded: 18
err: unexpected EOF