Support Proxy protocol (#12527)

This PR adds functionality to allow Gitea to sit behind an
HAProxy and HAProxy protocolled connections directly.

Fix #7508

Signed-off-by: Andrew Thornton <art27@cantab.net>

modules/setting/setting.go

@@ -94,45 +94,52 @@ var (
 	LocalURL string
 
 	// Server settings
-	Protocol             Scheme
-	Domain               string
-	HTTPAddr             string
-	HTTPPort             string
-	RedirectOtherPort    bool
-	PortToRedirect       string
-	OfflineMode          bool
-	CertFile             string
-	KeyFile              string
-	StaticRootPath       string
-	StaticCacheTime      time.Duration
-	EnableGzip           bool
-	LandingPageURL       LandingPage
-	LandingPageCustom    string
-	UnixSocketPermission uint32
-	EnablePprof          bool
-	PprofDataPath        string
-	EnableAcme           bool
-	AcmeTOS              bool
-	AcmeLiveDirectory    string
-	AcmeEmail            string
-	AcmeURL              string
-	AcmeCARoot           string
-	SSLMinimumVersion    string
-	SSLMaximumVersion    string
-	SSLCurvePreferences  []string
-	SSLCipherSuites      []string
-	GracefulRestartable  bool
-	GracefulHammerTime   time.Duration
-	StartupTimeout       time.Duration
-	PerWriteTimeout      = 30 * time.Second
-	PerWritePerKbTimeout = 10 * time.Second
-	StaticURLPrefix      string
-	AbsoluteAssetURL     string
+	Protocol                   Scheme
+	UseProxyProtocol           bool // `ini:"USE_PROXY_PROTOCOL"`
+	ProxyProtocolTLSBridging   bool //`ini:"PROXY_PROTOCOL_TLS_BRIDGING"`
+	ProxyProtocolHeaderTimeout time.Duration
+	ProxyProtocolAcceptUnknown bool
+	Domain                     string
+	HTTPAddr                   string
+	HTTPPort                   string
+	LocalUseProxyProtocol      bool
+	RedirectOtherPort          bool
+	RedirectorUseProxyProtocol bool
+	PortToRedirect             string
+	OfflineMode                bool
+	CertFile                   string
+	KeyFile                    string
+	StaticRootPath             string
+	StaticCacheTime            time.Duration
+	EnableGzip                 bool
+	LandingPageURL             LandingPage
+	LandingPageCustom          string
+	UnixSocketPermission       uint32
+	EnablePprof                bool
+	PprofDataPath              string
+	EnableAcme                 bool
+	AcmeTOS                    bool
+	AcmeLiveDirectory          string
+	AcmeEmail                  string
+	AcmeURL                    string
+	AcmeCARoot                 string
+	SSLMinimumVersion          string
+	SSLMaximumVersion          string
+	SSLCurvePreferences        []string
+	SSLCipherSuites            []string
+	GracefulRestartable        bool
+	GracefulHammerTime         time.Duration
+	StartupTimeout             time.Duration
+	PerWriteTimeout            = 30 * time.Second
+	PerWritePerKbTimeout       = 10 * time.Second
+	StaticURLPrefix            string
+	AbsoluteAssetURL           string
 
 	SSH = struct {
 		Disabled                              bool               `ini:"DISABLE_SSH"`
 		StartBuiltinServer                    bool               `ini:"START_SSH_SERVER"`
 		BuiltinServerUser                     string             `ini:"BUILTIN_SSH_SERVER_USER"`
+		UseProxyProtocol                      bool               `ini:"SSH_SERVER_USE_PROXY_PROTOCOL"`
 		Domain                                string             `ini:"SSH_DOMAIN"`
 		Port                                  int                `ini:"SSH_PORT"`
 		User                                  string             `ini:"SSH_USER"`
@@ -717,6 +724,10 @@ func loadFromConf(allowEmpty bool, extraConfig string) {
 			HTTPAddr = filepath.Join(AppWorkPath, HTTPAddr)
 		}
 	}
+	UseProxyProtocol = sec.Key("USE_PROXY_PROTOCOL").MustBool(false)
+	ProxyProtocolTLSBridging = sec.Key("PROXY_PROTOCOL_TLS_BRIDGING").MustBool(false)
+	ProxyProtocolHeaderTimeout = sec.Key("PROXY_PROTOCOL_HEADER_TIMEOUT").MustDuration(5 * time.Second)
+	ProxyProtocolAcceptUnknown = sec.Key("PROXY_PROTOCOL_ACCEPT_UNKNOWN").MustBool(false)
 	GracefulRestartable = sec.Key("ALLOW_GRACEFUL_RESTARTS").MustBool(true)
 	GracefulHammerTime = sec.Key("GRACEFUL_HAMMER_TIME").MustDuration(60 * time.Second)
 	StartupTimeout = sec.Key("STARTUP_TIMEOUT").MustDuration(0 * time.Second)
@@ -770,8 +781,10 @@ func loadFromConf(allowEmpty bool, extraConfig string) {
 	}
 	LocalURL = sec.Key("LOCAL_ROOT_URL").MustString(defaultLocalURL)
 	LocalURL = strings.TrimRight(LocalURL, "/") + "/"
+	LocalUseProxyProtocol = sec.Key("LOCAL_USE_PROXY_PROTOCOL").MustBool(UseProxyProtocol)
 	RedirectOtherPort = sec.Key("REDIRECT_OTHER_PORT").MustBool(false)
 	PortToRedirect = sec.Key("PORT_TO_REDIRECT").MustString("80")
+	RedirectorUseProxyProtocol = sec.Key("REDIRECTOR_USE_PROXY_PROTOCOL").MustBool(UseProxyProtocol)
 	OfflineMode = sec.Key("OFFLINE_MODE").MustBool()
 	DisableRouterLog = sec.Key("DISABLE_ROUTER_LOG").MustBool()
 	if len(StaticRootPath) == 0 {
@@ -836,6 +849,7 @@ func loadFromConf(allowEmpty bool, extraConfig string) {
 	SSH.KeygenPath = sec.Key("SSH_KEYGEN_PATH").MustString("ssh-keygen")
 	SSH.Port = sec.Key("SSH_PORT").MustInt(22)
 	SSH.ListenPort = sec.Key("SSH_LISTEN_PORT").MustInt(SSH.Port)
+	SSH.UseProxyProtocol = sec.Key("SSH_SERVER_USE_PROXY_PROTOCOL").MustBool(false)
 
 	// When disable SSH, start builtin server value is ignored.
 	if SSH.Disabled {