320 lines
8.0 KiB
Go
320 lines
8.0 KiB
Go
package server
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import (
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"bufio"
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"context"
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"encoding/hex"
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"fmt"
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"io"
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"log"
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"net"
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"os"
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"path/filepath"
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"strings"
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"sync"
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"time"
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"unicode/utf8"
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"weatherstation/internal/config"
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"weatherstation/internal/tools"
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"weatherstation/model"
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)
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// UTF8Writer 包装一个io.Writer，确保写入的数据是有效的UTF-8
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type UTF8Writer struct {
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w io.Writer
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}
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// NewUTF8Writer 创建一个新的UTF8Writer
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func NewUTF8Writer(w io.Writer) *UTF8Writer {
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return &UTF8Writer{w: w}
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}
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// Write 实现io.Writer接口
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func (w *UTF8Writer) Write(p []byte) (n int, err error) {
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if utf8.Valid(p) {
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return w.w.Write(p)
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}
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s := string(p)
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s = strings.ToValidUTF8(s, "")
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return w.w.Write([]byte(s))
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}
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var (
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logFile *os.File
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logFileMutex sync.Mutex
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currentLogDay int
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)
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// getLogBaseDir 返回日志目录：优先环境变量 LOG_DIR，否则使用可执行文件所在目录下的 log 子目录
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func getLogBaseDir() string {
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if v := os.Getenv("LOG_DIR"); strings.TrimSpace(v) != "" {
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return v
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}
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exe, _ := os.Executable()
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exeDir := filepath.Dir(exe)
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return filepath.Join(exeDir, "log")
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}
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// getLogFileName 获取当前日期的日志文件名
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func getLogFileName() string {
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currentTime := time.Now()
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return filepath.Join(getLogBaseDir(), fmt.Sprintf("%s.log", currentTime.Format("2006-01-02")))
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}
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// openLogFile 打开日志文件
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func openLogFile() (*os.File, error) {
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logDir := getLogBaseDir()
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if err := os.MkdirAll(logDir, 0o755); err != nil {
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return nil, err
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}
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logFileName := getLogFileName()
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return os.OpenFile(logFileName, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0o644)
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}
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// SetupLogger 设置日志系统
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func SetupLogger() {
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var err error
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logFile, err = openLogFile()
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if err != nil {
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log.Fatalf("无法创建日志文件: %v", err)
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}
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currentLogDay = time.Now().Day()
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bufferedWriter := bufio.NewWriter(logFile)
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utf8Writer := NewUTF8Writer(bufferedWriter)
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go func() {
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for {
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time.Sleep(1 * time.Second)
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logFileMutex.Lock()
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bufferedWriter.Flush()
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now := time.Now()
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if now.Day() != currentLogDay {
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oldLogFile := logFile
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logFile, err = openLogFile()
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if err != nil {
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log.Printf("无法创建新日志文件: %v", err)
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} else {
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oldLogFile.Close()
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currentLogDay = now.Day()
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bufferedWriter = bufio.NewWriter(logFile)
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utf8Writer = NewUTF8Writer(bufferedWriter)
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log.SetOutput(io.MultiWriter(os.Stdout, utf8Writer))
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log.Println("日志文件已轮转")
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}
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}
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logFileMutex.Unlock()
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}
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}()
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multiWriter := io.MultiWriter(os.Stdout, utf8Writer)
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log.SetOutput(multiWriter)
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log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile)
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}
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// StartUDPServer 启动UDP服务器
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func StartUDPServer() error {
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cfg := config.GetConfig()
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// 初始化数据库连接
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if err := model.InitDB(); err != nil {
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return fmt.Errorf("初始化数据库失败: %v", err)
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}
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defer model.CloseDB()
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addr := fmt.Sprintf(":%d", cfg.Server.UDPPort)
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conn, err := net.ListenPacket("udp", addr)
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if err != nil {
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return fmt.Errorf("无法监听UDP端口 %d: %v", cfg.Server.UDPPort, err)
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}
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defer conn.Close()
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log.Printf("UDP服务器已启动，监听端口 %d...", cfg.Server.UDPPort)
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buffer := make([]byte, 2048)
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// 后台定时：每分钟回刷最近30分钟（全站）
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go func() {
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for {
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now := time.Now()
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from := now.Add(-30 * time.Minute)
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ctx := context.Background()
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if err := tools.RunBackfill10Min(ctx, tools.BackfillOptions{
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FromTime: from,
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ToTime: now,
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WrapCycleMM: 0,
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BucketMinutes: 10,
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}); err != nil {
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log.Printf("定时回填失败: %v", err)
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}
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time.Sleep(1 * time.Minute)
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}
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}()
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// 说明：原有的 open-meteo/彩云/CMA 定时抓取已移除，避免与独立的 service-forecast 重复调度。
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// 若需要启用预报抓取，请运行 `cmd/service-forecast` 服务。
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// 说明：融合任务已迁移至独立服务（service-fusion）。
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for {
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n, addr, err := conn.ReadFrom(buffer)
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if err != nil {
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log.Printf("读取数据错误: %v", err)
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continue
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}
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rawData := buffer[:n]
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log.Printf("从 %s 接收到 %d 字节数据", addr.String(), n)
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hexDump := hexDump(rawData)
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log.Printf("原始码流(十六进制):\n%s", hexDump)
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asciiDump := asciiDump(rawData)
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log.Printf("ASCII码:\n%s", asciiDump)
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if len(rawData) == 25 && rawData[0] == 0x24 {
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handleRS485Data(rawData, addr, hexDump)
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} else {
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handleWiFiData(rawData, addr)
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}
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}
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}
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// handleRS485Data 处理RS485设备数据
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func handleRS485Data(rawData []byte, addr net.Addr, hexDump string) {
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log.Println("485 型气象站数据")
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// 生成源码字符串（用于日志记录）
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sourceHex := strings.ReplaceAll(strings.TrimSpace(hexDump), "\n", " ")
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log.Printf("源码: %s", sourceHex)
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// 解析RS485数据
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protocol := model.NewProtocol(rawData)
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rs485Protocol := model.NewRS485Protocol(rawData)
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// 获取设备ID
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idParts, err := protocol.GetCompleteID()
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if err != nil {
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log.Printf("获取设备ID失败: %v", err)
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return
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}
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// 解析RS485数据
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rs485Data, err := rs485Protocol.ParseRS485Data()
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if err != nil {
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log.Printf("解析RS485数据失败: %v", err)
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return
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}
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// 添加设备ID和时间戳
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rs485Data.DeviceID = idParts.Complete.Hex
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rs485Data.ReceivedAt = time.Now()
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rs485Data.RawDataHex = sourceHex
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// 打印解析结果到日志
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log.Println("=== RS485 ===")
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log.Printf("设备ID: RS485-%s", rs485Data.DeviceID)
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log.Printf("温度: %.2f°C", rs485Data.Temperature)
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log.Printf("湿度: %.1f%%", rs485Data.Humidity)
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log.Printf("风速: %.5f m/s", rs485Data.WindSpeed)
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log.Printf("风向: %.1f°", rs485Data.WindDirection)
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log.Printf("降雨量: %.3f mm", rs485Data.Rainfall)
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log.Printf("光照: %.1f lux", rs485Data.Light)
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log.Printf("紫外线: %.1f", rs485Data.UV)
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log.Printf("气压: %.2f hPa", rs485Data.Pressure)
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log.Printf("接收时间: %s", rs485Data.ReceivedAt.Format("2006-01-02 15:04:05"))
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// 注册设备
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stationID := fmt.Sprintf("RS485-%s", rs485Data.DeviceID)
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model.RegisterDevice(stationID, addr)
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log.Printf("设备 %s 已注册，IP: %s", stationID, addr.String())
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// 保存到数据库
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err = model.SaveWeatherData(rs485Data, string(rawData))
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if err != nil {
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log.Printf("保存数据到数据库失败: %v", err)
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} else {
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log.Printf("数据已成功保存到数据库")
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}
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}
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// handleWiFiData 处理WiFi设备数据
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func handleWiFiData(rawData []byte, addr net.Addr) {
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// 尝试解析WIFI数据
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data, deviceType, err := model.ParseData(rawData)
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if err != nil {
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log.Printf("解析数据失败: %v", err)
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return
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}
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log.Println("成功解析气象站数据:")
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log.Printf("设备类型: %s", getDeviceTypeString(deviceType))
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log.Println(data)
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if deviceType == model.DeviceTypeWIFI {
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if wifiData, ok := data.(*model.WeatherData); ok {
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stationID := wifiData.StationID
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if stationID != "" {
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model.RegisterDevice(stationID, addr)
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log.Printf("设备 %s 已注册，IP: %s", stationID, addr.String())
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} else {
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log.Printf("警告: 收到的数据没有站点ID")
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}
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}
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}
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}
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// getDeviceTypeString 获取设备类型字符串
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func getDeviceTypeString(deviceType model.DeviceType) string {
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switch deviceType {
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case model.DeviceTypeWIFI:
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return "WIFI"
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case model.DeviceTypeRS485:
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return "RS485"
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default:
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return "未知"
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}
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}
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// hexDump 生成十六进制转储
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func hexDump(data []byte) string {
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var result strings.Builder
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for i := 0; i < len(data); i += 16 {
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end := i + 16
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if end > len(data) {
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end = len(data)
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}
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chunk := data[i:end]
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hexStr := hex.EncodeToString(chunk)
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for j := 0; j < len(hexStr); j += 2 {
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if j+2 <= len(hexStr) {
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result.WriteString(strings.ToUpper(hexStr[j : j+2]))
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result.WriteString(" ")
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}
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}
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result.WriteString("\n")
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}
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return result.String()
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}
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// asciiDump 生成ASCII转储
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func asciiDump(data []byte) string {
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var result strings.Builder
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for i := 0; i < len(data); i += 64 {
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end := i + 64
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if end > len(data) {
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end = len(data)
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}
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chunk := data[i:end]
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for _, b := range chunk {
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if b >= 32 && b <= 126 {
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result.WriteByte(b)
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} else {
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result.WriteString(".")
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}
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}
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result.WriteString("\n")
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}
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return result.String()
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}
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