fix(watchdog): fix watchdog unable to send webhook and simplify the parsing of json config

- Change webhook config headers and body from map to string format
- Move command parsing logic to separate function in command.go
- Add debug logging for webhook operations
- Improve exception handling with proper JSON parsing
- Simplify config loading logic with default values

watchdog/command.go

@@ -3,6 +3,7 @@ package watchdog
 import (
 	"fmt"
 	"super-frpc/postLog"
+	"super-frpc/utils"
 )
 
 func AddInstance(serviceName string) bool {
@@ -70,4 +71,17 @@ func Close() bool {
 	}
 
 	return false
+}
+
+func parseCommand(cmd string) (result string, err error) {
+	cmdType := utils.GetCmdType(cmd)
+	if cmdType == "Exception" {
+		// Watchdog msg: [Exception] <exceptionType>...</exceptionType> <serviceName>...</serviceName> <errorMsg>...</errorMsg>
+		exceptionType := utils.GetCmdParams(cmd, "exceptionType")
+		serviceName := utils.GetCmdParams(cmd, "serviceName")
+		errorMsg := utils.GetCmdParams(cmd, "errorMsg")
+		postLog.Error(fmt.Sprintf("[Watchdog] Exception[%s]: %s, %s", serviceName, exceptionType, errorMsg))
+		exceptionHandle(exceptionType, serviceName, errorMsg)
+	}
+	return "", nil
 }