Fix ipv6 parsing (#12321)

* Fix ipv6 parsing

* Update modules/setting/setting.go

Co-authored-by: 6543 <6543@obermui.de>

Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

cmd/web.go

@@ -7,6 +7,7 @@ package cmd
 import (
 	"context"
 	"fmt"
+	"net"
 	"net/http"
 	_ "net/http/pprof" // Used for debugging if enabled and a web server is running
 	"os"
@@ -156,7 +157,7 @@ func runWeb(ctx *cli.Context) error {
 
 	listenAddr := setting.HTTPAddr
 	if setting.Protocol != setting.UnixSocket && setting.Protocol != setting.FCGIUnix {
-		listenAddr += ":" + setting.HTTPPort
+		listenAddr = net.JoinHostPort(listenAddr, setting.HTTPPort)
 	}
 	log.Info("Listen: %v://%s%s", setting.Protocol, listenAddr, setting.AppSubURL)
 

models/repo.go

@@ -17,6 +17,7 @@ import (
 	_ "image/jpeg"
 	"image/png"
 	"io/ioutil"
+	"net"
 	"net/url"
 	"os"
 	"path"
@@ -969,12 +970,21 @@ func (repo *Repository) cloneLink(isWiki bool) *CloneLink {
 	}
 
 	cl := new(CloneLink)
+
+	// if we have a ipv6 literal we need to put brackets around it
+	// for the git cloning to work.
+	sshDomain := setting.SSH.Domain
+	ip := net.ParseIP(setting.SSH.Domain)
+	if ip != nil && ip.To4() == nil {
+		sshDomain = "[" + setting.SSH.Domain + "]"
+	}
+
 	if setting.SSH.Port != 22 {
-		cl.SSH = fmt.Sprintf("ssh://%s@%s:%d/%s/%s.git", sshUser, setting.SSH.Domain, setting.SSH.Port, repo.OwnerName, repoName)
+		cl.SSH = fmt.Sprintf("ssh://%s@%s/%s/%s.git", sshUser, net.JoinHostPort(setting.SSH.Domain, strconv.Itoa(setting.SSH.Port)), repo.OwnerName, repoName)
 	} else if setting.Repository.UseCompatSSHURI {
-		cl.SSH = fmt.Sprintf("ssh://%s@%s/%s/%s.git", sshUser, setting.SSH.Domain, repo.OwnerName, repoName)
+		cl.SSH = fmt.Sprintf("ssh://%s@%s/%s/%s.git", sshUser, sshDomain, repo.OwnerName, repoName)
 	} else {
-		cl.SSH = fmt.Sprintf("%s@%s:%s/%s.git", sshUser, setting.SSH.Domain, repo.OwnerName, repoName)
+		cl.SSH = fmt.Sprintf("%s@%s:%s/%s.git", sshUser, sshDomain, repo.OwnerName, repoName)
 	}
 	cl.HTTPS = ComposeHTTPSCloneURL(repo.OwnerName, repoName)
 	return cl

modules/setting/setting.go

@@ -626,8 +626,10 @@ func NewContext() {
 	StaticURLPrefix = strings.TrimSuffix(sec.Key("STATIC_URL_PREFIX").MustString(AppSubURL), "/")
 	AppSubURLDepth = strings.Count(AppSubURL, "/")
 	// Check if Domain differs from AppURL domain than update it to AppURL's domain
-	// TODO: Can be replaced with url.Hostname() when minimal GoLang version is 1.8
-	urlHostname := strings.SplitN(appURL.Host, ":", 2)[0]
+	urlHostname, _, err := net.SplitHostPort(appURL.Host)
+	if err != nil {
+		log.Fatal("Invalid host in ROOT_URL '%s': %s", appURL.Host, err)
+	}
 	if urlHostname != Domain && net.ParseIP(urlHostname) == nil {
 		Domain = urlHostname
 	}
@@ -643,11 +645,10 @@ func NewContext() {
 	default:
 		defaultLocalURL = string(Protocol) + "://"
 		if HTTPAddr == "0.0.0.0" {
-			defaultLocalURL += "localhost"
+			defaultLocalURL += net.JoinHostPort("localhost", HTTPPort) + "/"
 		} else {
-			defaultLocalURL += HTTPAddr
+			defaultLocalURL += net.JoinHostPort(HTTPAddr, HTTPPort) + "/"
 		}
-		defaultLocalURL += ":" + HTTPPort + "/"
 	}
 	LocalURL = sec.Key("LOCAL_ROOT_URL").MustString(defaultLocalURL)
 	RedirectOtherPort = sec.Key("REDIRECT_OTHER_PORT").MustBool(false)