Add new console/http loggers (#6066)

- Add console target logging, enabled by default.
- Add http target logging, which supports an endpoint
  with basic authentication (username/password are passed
  in the endpoint url itself)
- HTTP target logging is asynchronous and some logs can be
  dropped if channel buffer (10000) is full

cmd/logger/logger.go

@@ -299,74 +299,21 @@ func LogIf(ctx context.Context, err error) {
 	// Get the cause for the Error
 	message := err.Error()
 
-	// Output the formatted log message at console
-	var output string
-	if jsonFlag {
-		logJSON, err := json.Marshal(&logEntry{
-			Level:      ErrorLvl.String(),
-			RemoteHost: req.RemoteHost,
-			RequestID:  req.RequestID,
-			UserAgent:  req.UserAgent,
-			Time:       time.Now().UTC().Format(time.RFC3339Nano),
-			API:        &api{Name: API, Args: &args{Bucket: req.BucketName, Object: req.ObjectName}},
-			Trace:      &traceEntry{Message: message, Source: trace, Variables: tags},
-		})
-		if err != nil {
-			panic(err)
-		}
-		output = string(logJSON)
-	} else {
-		// Add a sequence number and formatting for each stack trace
-		// No formatting is required for the first entry
-		for i, element := range trace {
-			trace[i] = fmt.Sprintf("%8v: %s", i+1, element)
-		}
-
-		tagString := ""
-		for key, value := range tags {
-			if value != "" {
-				if tagString != "" {
-					tagString += ", "
-				}
-				tagString += key + "=" + value
-			}
-		}
-
-		apiString := "API: " + API + "("
-		if req.BucketName != "" {
-			apiString = apiString + "bucket=" + req.BucketName
-		}
-		if req.ObjectName != "" {
-			apiString = apiString + ", object=" + req.ObjectName
-		}
-		apiString += ")"
-		timeString := "Time: " + time.Now().Format(loggerTimeFormat)
-
-		var requestID string
-		if req.RequestID != "" {
-			requestID = "\nRequestID: " + req.RequestID
-		}
-
-		var remoteHost string
-		if req.RemoteHost != "" {
-			remoteHost = "\nRemoteHost: " + req.RemoteHost
-		}
-
-		var userAgent string
-		if req.UserAgent != "" {
-			userAgent = "\nUserAgent: " + req.UserAgent
-		}
-
-		if len(tags) > 0 {
-			tagString = "\n       " + tagString
-		}
-
-		var msg = colorFgRed(colorBold(message))
-		output = fmt.Sprintf("\n%s\n%s%s%s%s\nError: %s%s\n%s",
-			apiString, timeString, requestID, remoteHost, userAgent,
-			msg, tagString, strings.Join(trace, "\n"))
+	entry := logEntry{
+		DeploymentID: deploymentID,
+		Level:        ErrorLvl.String(),
+		RemoteHost:   req.RemoteHost,
+		RequestID:    req.RequestID,
+		UserAgent:    req.UserAgent,
+		Time:         time.Now().UTC().Format(time.RFC3339Nano),
+		API:          &api{Name: API, Args: &args{Bucket: req.BucketName, Object: req.ObjectName}},
+		Trace:        &traceEntry{Message: message, Source: trace, Variables: tags},
+	}
+
+	// Iterate over all logger targets to send the log entry
+	for _, t := range Targets {
+		t.send(entry)
 	}
-	fmt.Println(output)
 }
 
 // ErrCritical is the value panic'd whenever CriticalIf is called.