feat: 添加任务执行功能

fix: 版本解析逻辑

server/task.go

@@ -0,0 +1,81 @@
+package server
+
+import (
+	"bytes"
+	"encoding/json"
+	"log"
+	"net/http"
+	"os/exec"
+	"runtime"
+	"strings"
+	"time"
+
+	"github.com/komari-monitor/komari-agent/cmd/flags"
+)
+
+func NewTask(task_id, command string) {
+	if task_id == "" {
+		return
+	}
+	if command == "" {
+		uploadTaskResult(task_id, "No command provided", 0, time.Now())
+		return
+	}
+	if flags.DisableWebSsh {
+		uploadTaskResult(task_id, "Web SSH (REC) is disabled.", -1, time.Now())
+		return
+	}
+	log.Printf("Executing task %s with command: %s", task_id, command)
+	var cmd *exec.Cmd
+	if runtime.GOOS == "windows" {
+		cmd = exec.Command("powershell", "-NoProfile", "-ExecutionPolicy", "Bypass", "-Command", "[Console]::OutputEncoding = [System.Text.Encoding]::UTF8; "+command)
+	} else {
+		cmd = exec.Command("sh", "-c", command)
+	}
+	var stdout, stderr bytes.Buffer
+	cmd.Stdout = &stdout
+	cmd.Stderr = &stderr
+
+	err := cmd.Run()
+	finishedAt := time.Now()
+
+	result := stdout.String()
+	if stderr.Len() > 0 {
+		result += "\n" + stderr.String()
+	}
+	result = strings.ReplaceAll(result, "\r\n", "\n")
+	exitCode := 0
+	if err != nil {
+		if exitError, ok := err.(*exec.ExitError); ok {
+			exitCode = exitError.ExitCode()
+		}
+	}
+
+	uploadTaskResult(task_id, result, exitCode, finishedAt)
+}
+
+func uploadTaskResult(taskID, result string, exitCode int, finishedAt time.Time) {
+	payload := map[string]interface{}{
+		"task_id":     taskID,
+		"result":      result,
+		"exit_code":   exitCode,
+		"finished_at": finishedAt,
+	}
+
+	jsonData, _ := json.Marshal(payload)
+	endpoint := flags.Endpoint + "/api/clients/task/result?token=" + flags.Token
+
+	resp, _ := http.Post(endpoint, "application/json", bytes.NewBuffer(jsonData))
+	maxRetry := flags.MaxRetries
+	for i := 0; i < maxRetry && resp.StatusCode != http.StatusOK; i++ {
+		log.Printf("Failed to upload task result, retrying %d/%d", i+1, maxRetry)
+		time.Sleep(2 * time.Second) // Wait before retrying
+		resp, _ = http.Post(endpoint, "application/json", bytes.NewBuffer(jsonData))
+	}
+	if resp != nil {
+		defer resp.Body.Close()
+		if resp.StatusCode != http.StatusOK {
+			log.Printf("Failed to upload task result: %s", resp.Status)
+		}
+	}
+}