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net/http: issue with wildcard listening in net.http #6808

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gopherbot opened this issue Nov 21, 2013 · 3 comments
Closed

net/http: issue with wildcard listening in net.http #6808

gopherbot opened this issue Nov 21, 2013 · 3 comments
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@gopherbot
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by pavel.odintsov:

Hello!

I have troubles with wildcard listening on machine with IPv4 and IPv6 both. I need
listen only on IPv4 interfaces.


What steps will reproduce the problem?
If possible, include a link to a program on play.golang.org.
1.  http://play.golang.org./p/WOPvpx3UqT

What is the expected output?
tcp        0      0 0.0.0.0:8443                     :::*                        LISTEN 
    89622/./vzapi       

What do you see instead?
My applications listen both protocols:
netstat -lnpt|grep 8443
tcp        0      0 :::8443                     :::*                        LISTEN     
89622/./vzapi       


Which compiler are you using (5g, 6g, 8g, gccgo)?
go build

Which operating system are you using?
cat /etc/issue
CentOS release 6.4 (Final)
Kernel \r on an \m

Which version are you using?  (run 'go version')
go version
go version go1.1.2 linux/amd64

Please provide any additional information below.
ifconfig 
eth0      Link encap:Ethernet  HWaddr 00:1B:21:B8:7F:52  
          inet addr:176.9.59.50  Bcast:176.9.xxx.xx  Mask:255.255.255.255
          inet6 addr: 2a01:xxx:150:9222::2/64 Scope:Global
          inet6 addr: fe80::21b:21ff:feb8:7f52/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:12578573 errors:0 dropped:32 overruns:0 frame:0
          TX packets:8448379 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:14217230345 (13.2 GiB)  TX bytes:2232820668 (2.0 GiB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:23058 errors:0 dropped:0 overruns:0 frame:0
          TX packets:23058 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:1850865 (1.7 MiB)  TX bytes:1850865 (1.7 MiB)

venet0    Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          inet6 addr: fe80::1/128 Scope:Link
          UP BROADCAST POINTOPOINT RUNNING NOARP  MTU:1500  Metric:1
          RX packets:5764178 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8052839 errors:0 dropped:15 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:1890923604 (1.7 GiB)  TX bytes:8033500011 (7.4 GiB)
@mikioh
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mikioh commented Nov 22, 2013

Comment 1:

You can inject your favorite net.Listener into http stuff. For example,
package main
import (
        "fmt"
        "html"
        "log"
        "net"
        "net/http"
)
func main() {
        ln, err := net.Listen("tcp4", "0.0.0.0:8080")
        if err != nil {
                log.Fatal(err)
        }
        http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
                fmt.Fprintf(w, "Hello, %q", html.EscapeString(r.URL.Path))
        })
        if err := http.Serve(ln, nil); err != nil {
                log.Fatal(err)
        }
}

Status changed to Retracted.

@gopherbot
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Comment 2 by pavel.odintsov:

Hello!
Thank you for answer!
Unfortunately injecting custom listener into ListenAndServeTLS method leads to copy &
paste about ~35 lines of code from http.go.

@bradfitz
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Comment 3:

ListenAndServeTLS is just an example of code you should copy/paste when you have special
needs.  I've copy/pasted it a number of times and tweaked the config for what I need.  I
think that's okay.

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@bradfitz @mikioh @gopherbot