update README

__dist/README.txt

@@ -0,0 +1,52 @@
+A logging service for NMDC hubs.
+
+It logs public chat messages to a file, categorised by months. Binaries are provided for Windows/Linux amd64/i386.
+
+Written in golang
+Tags: nmdc
+
+=USAGE=
+
+`$nmdc-log-service -Help
+
+Usage of nmdc-log-service:
+  -Debug
+        Print additional information on stdout
+  -Dir string
+        Output directory (default ".")
+  -LogConnectionState
+        Include connection state changes in log (default true)
+  -Nick string
+        Nick (default "nmdc-log-service")
+  -PMResponse string
+        Message to respond with on PM (default "This is an automated service. For enquiries, please contact an administrator.")
+  -Password string
+        Registered nick password
+  -Server string
+        Addresses to connect to (comma-separated)
+  -VerifyTLS
+        Verify TLS certificates (default true)
+`
+
+=CHANGELOG=
+
+2016-04-16 1.0.4
+- Enhancement: Upgrade `libnmdc` from `r5` to `r6`
+- Include a sample systemd unit script in source archive
+- Fix an issue showing zero connected hubs in user tag
+- Fix a cosmetic issue with logging repeated identical connection failure messages
+
+2016-04-04 1.0.3
+- Enhancement: Upgrade `libnmdc` from `r4` to `r5`
+
+2016-04-03 1.0.2
+- Enhancement: Upgrade `libnmdc` from `r3` to `r4`
+
+2016-04-03 1.0.1
+- Enhancement: Add `-VerifyTLS` option
+- Enhancement: Upgrade `libnmdc` from `r2` to `r3`
+- Fix an issue writing log files on Linux
+- Fix a cosmetic issue with error message formatting
+
+2016-04-02 1.0.0
+- Initial public release

build.sh

@@ -7,6 +7,12 @@ export GOPATH=$(
 	cygpath -w "$(pwd)"
 )
 
+sanitise() {
+	local tmp=$(mktemp)
+	cat "$1" | perl -pe 's~C:.Users.......Documents.DEV.~C:/xxxxxxxxxxxxxxxxxxxxxxxxx/~g' > "$tmp"
+	mv "$tmp" "$1"
+}
+
 main() {
 
 	local version=""
@@ -24,22 +30,26 @@ main() {
 	fi
 	
 	echo "Building win64..."
-	GOARCH=amd64 GOOS=windows go build -ldflags -s -o nmdc-log-service.exe
+	GOARCH=amd64 GOOS=windows go build -a -ldflags -s -o nmdc-log-service.exe
+	sanitise nmdc-log-service.exe
 	7z a -mx9 nmdc-log-service-${version}-win64.7z nmdc-log-service.exe >/dev/null
 	rm ./nmdc-log-service.exe
 	
 	echo "Building win32..."
-	GOARCH=386 GOOS=windows go build -ldflags -s -o nmdc-log-service.exe
+	GOARCH=386 GOOS=windows go build -a -ldflags -s -o nmdc-log-service.exe
+	sanitise nmdc-log-service.exe
 	7z a -mx9 nmdc-log-service-${version}-win32.7z nmdc-log-service.exe >/dev/null
 	rm ./nmdc-log-service.exe
 	
 	echo "Building linux64..."
-	GOARCH=amd64 GOOS=linux go build -ldflags -s -o nmdc-log-service
+	GOARCH=amd64 GOOS=linux go build -a -ldflags -s -o nmdc-log-service
+	sanitise nmdc-log-service
 	XZ_OPT=-9 tar caf nmdc-log-service-${version}-linux64.tar.xz nmdc-log-service --owner=0 --group=0
 	rm ./nmdc-log-service
 	
 	echo "Building linux32..."
-	GOARCH=386 GOOS=linux go build -ldflags -s -o nmdc-log-service
+	GOARCH=386 GOOS=linux go build -a -ldflags -s -o nmdc-log-service
+	sanitise nmdc-log-service
 	XZ_OPT=-9 tar caf nmdc-log-service-${version}-linux32.tar.xz nmdc-log-service --owner=0 --group=0
 	rm ./nmdc-log-service
 	

hublog.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=NMDC Log Service
+
+[Service]
+Environment=TZ=Etc/UTC
+Type=simple
+ExecStart=/home/hublog/nmdc-log-service -Dir /home/hublog/logs/ -Server ... -Nick ... -Password '...' -VerifyTLS=false
+Restart=always
+RestartSec=30s
+User=hublog
+Group=nogroup
+
+[Install]
+WantedBy=multi-user.target

main.go

@@ -15,6 +15,7 @@ var BaseDir string = "."
 var PMResponse string = ""
 var LogConnectionState bool
 var DebugMode bool
+var VerifyTLS bool
 var CharacterMatcher *regexp.Regexp
 
 func init() {
@@ -36,7 +37,7 @@ func LogMessage(hub, message string) {
 	// Produce a timestamp
 	timeStamp := instant.Format("2006-01-02 15:04:05")
 
-	fh, err := os.OpenFile(logFilePath, os.O_APPEND|os.O_CREATE, 0644)
+	fh, err := os.OpenFile(logFilePath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "Couldn't open file '%s': %s\n", logFilePath, err.Error())
 		return
@@ -50,11 +51,16 @@ func LogMessage(hub, message string) {
 	}
 }
 
-func HubWorker(addr, nick, password string) {
+type HubWorker struct {
+	LastConnectionStateMessage string
+}
+
+func (this *HubWorker) MainLoop(addr, nick, password string) {
 
 	opts := libnmdc.HubConnectionOptions{
 		Address:       libnmdc.HubAddress(addr),
-		Self:         libnmdc.UserInfo{Nick: nick},
+		SkipVerifyTLS: !VerifyTLS,
+		Self:          *libnmdc.NewUserInfo(nick),
 		NickPassword:  password,
 	}
 	hub := opts.Connect()
@@ -69,11 +75,16 @@ func HubWorker(addr, nick, password string) {
 		switch event.EventType {
 		case libnmdc.EVENT_CONNECTION_STATE_CHANGED:
 			if LogConnectionState {
+				str := "* " + event.StateChange.Format()
 				if len(event.Message) > 0 {
-					LogMessage(addr, "* "+event.StateChange.Format()+" ("+event.Message+")")
-				} else {
-					LogMessage(addr, "* "+event.StateChange.Format())
+					str += " (" + event.Message + ")"
 				}
+
+				// Prevent logging the same message repeatedly
+				if str != this.LastConnectionStateMessage {
+					LogMessage(addr, str)
+				}
+				this.LastConnectionStateMessage = str
 			}
 
 		case libnmdc.EVENT_PUBLIC:
@@ -104,18 +115,23 @@ func main() {
 	flag.BoolVar(&LogConnectionState, "LogConnectionState", true, "Include connection state changes in log")
 	flag.StringVar(&PMResponse, "PMResponse", "This is an automated service. For enquiries, please contact an administrator.", "Message to respond with on PM")
 	flag.BoolVar(&DebugMode, "Debug", false, "Print additional information on stdout")
+	flag.BoolVar(&VerifyTLS, "VerifyTLS", true, "Verify TLS certificates")
 	flag.Parse()
 
 	// Assert dir exists
 	dinfo, err := os.Stat(BaseDir)
 	if err != nil {
-		fmt.Fprintf(os.Stderr, "FATAL: %s", err.Error())
+		fmt.Fprintf(os.Stderr, "FATAL: %s\n", err.Error())
 		os.Exit(1)
 	}
 	if !dinfo.IsDir() {
 		fmt.Fprintf(os.Stderr, "FATAL: Path '%s' is not a directory\n", BaseDir)
 	}
 
+	if !VerifyTLS {
+		fmt.Fprintf(os.Stderr, "WARNING: TLS certificates will not be verified!\n")
+	}
+
 	// Launch loggers
 	all_hubs := strings.Split(*hubs, ",")
 	launch_ct := 0
@@ -128,7 +144,8 @@ func main() {
 		os.MkdirAll(GetDirectoryNameForHub(hubaddr), 0755)
 
 		// Launch logger
-		go HubWorker(hubaddr, *nick, *password)
+		hw := HubWorker{}
+		go hw.MainLoop(hubaddr, *nick, *password)
 
 		launch_ct++
 	}