What version of Go are you using (go version)?
$ go version
go version go1.10.3 darwin/amd64
What operating system and processor architecture are you using (go env)?
go env Output
$ go env
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/qiufeng/Library/Caches/go-build"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/qiufeng/go"
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
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/pr/1blgkr1j60bbscwnp21g4bqr0000gn/T/go-build995562236=/tmp/go-build -gno-record-gcc-switches -fno-common"
What did you do?
package main
import (
"net"
"context"
"log"
)
func main() {
host:="*.qzone.qq.com"
log.Println(net.LookupHost(host))
r := net.Resolver{
PreferGo:true,
StrictErrors:true,
Dial: DNSDialer,
}
ctx := context.Background()
ipaddr, err := r.LookupHost(ctx, host)
if err != nil {
log.Println(err)
}
log.Println(ipaddr)
}
func DNSDialer(ctx context.Context, network, address string) (net.Conn, error) {
d := net.Dialer{}
return d.DialContext(ctx, "udp", "8.8.8.8:53")
}
What did you expect to see?
$ go run test2.go
2018/11/26 10:47:27 [180.163.21.59]
2018/11/26 10:47:27 [180.163.21.59]
What did you see instead?
$ go run test2.go
2018/11/26 10:47:27 [180.163.21.59]
2018/11/26 10:47:27 lookup *.qzone.qq.com: no such host
2018/11/26 10:47:27 []
