299 lines
7.3 KiB
Go
299 lines
7.3 KiB
Go
package main
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import (
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"database/sql"
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"fmt"
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"net/http"
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"strconv"
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"time"
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"weatherstation/config"
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"github.com/gin-gonic/gin"
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_ "github.com/lib/pq"
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)
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var ginDB *sql.DB
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func initGinDB() error {
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cfg := config.GetConfig()
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connStr := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=%s",
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cfg.Database.Host, cfg.Database.Port, cfg.Database.User,
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cfg.Database.Password, cfg.Database.DBName, cfg.Database.SSLMode)
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var err error
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ginDB, err = sql.Open("postgres", connStr)
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if err != nil {
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return fmt.Errorf("无法连接到数据库: %v", err)
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}
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err = ginDB.Ping()
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if err != nil {
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return fmt.Errorf("数据库连接测试失败: %v", err)
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}
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return nil
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}
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// 获取在线设备数量
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func getOnlineDevicesCount() int {
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if ginDB == nil {
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return 0
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}
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query := `
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SELECT COUNT(DISTINCT station_id)
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FROM rs485_weather_data
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WHERE timestamp > NOW() - INTERVAL '5 minutes'`
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var count int
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err := ginDB.QueryRow(query).Scan(&count)
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if err != nil {
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return 0
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}
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return count
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}
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// 主页面处理器
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func indexHandler(c *gin.Context) {
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data := PageData{
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Title: "英卓气象站",
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ServerTime: time.Now().Format("2006-01-02 15:04:05"),
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OnlineDevices: getOnlineDevicesCount(),
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TiandituKey: "0c260b8a094a4e0bc507808812cefdac",
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}
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c.HTML(http.StatusOK, "index.html", data)
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}
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// 系统状态API
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func systemStatusHandler(c *gin.Context) {
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status := SystemStatus{
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OnlineDevices: getOnlineDevicesCount(),
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ServerTime: time.Now().Format("2006-01-02 15:04:05"),
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}
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c.JSON(http.StatusOK, status)
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}
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// 获取WH65LP站点列表API
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func getStationsHandler(c *gin.Context) {
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query := `
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SELECT DISTINCT s.station_id,
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COALESCE(s.password, '') as station_name,
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'WH65LP' as device_type,
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COALESCE(MAX(r.timestamp), '1970-01-01'::timestamp) as last_update,
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COALESCE(s.latitude, 0) as latitude,
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COALESCE(s.longitude, 0) as longitude,
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COALESCE(s.name, '') as name,
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COALESCE(s.location, '') as location
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FROM stations s
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LEFT JOIN rs485_weather_data r ON s.station_id = r.station_id
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WHERE s.station_id LIKE 'RS485-%'
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GROUP BY s.station_id, s.password, s.latitude, s.longitude, s.name, s.location
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ORDER BY s.station_id`
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rows, err := ginDB.Query(query)
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if err != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "查询站点失败"})
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return
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}
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defer rows.Close()
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var stations []Station
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for rows.Next() {
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var station Station
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var lastUpdate time.Time
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err := rows.Scan(
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&station.StationID,
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&station.StationName,
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&station.DeviceType,
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&lastUpdate,
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&station.Latitude,
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&station.Longitude,
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&station.Name,
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&station.Location,
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)
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if err != nil {
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continue
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}
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station.LastUpdate = lastUpdate.Format("2006-01-02 15:04:05")
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// 从station_id中提取十六进制ID并转换为十进制
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if len(station.StationID) > 6 {
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hexID := station.StationID[len(station.StationID)-6:]
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if decimalID, err := strconv.ParseInt(hexID, 16, 64); err == nil {
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station.DecimalID = strconv.FormatInt(decimalID, 10)
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}
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}
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stations = append(stations, station)
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}
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c.JSON(http.StatusOK, stations)
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}
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// 获取历史数据API
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func getDataHandler(c *gin.Context) {
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// 获取查询参数
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decimalID := c.Query("decimal_id")
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startTime := c.Query("start_time")
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endTime := c.Query("end_time")
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interval := c.Query("interval")
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// 将十进制ID转换为十六进制（补足6位）
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decimalNum, err := strconv.ParseInt(decimalID, 10, 64)
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if err != nil {
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c.JSON(http.StatusBadRequest, gin.H{"error": "无效的站点编号"})
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return
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}
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hexID := fmt.Sprintf("%06X", decimalNum)
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stationID := fmt.Sprintf("RS485-%s", hexID)
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// 构建查询SQL
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var query string
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switch interval {
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case "10min":
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query = `
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WITH grouped_data AS (
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SELECT
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date_trunc('hour', timestamp) +
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(floor(date_part('minute', timestamp) / 10) * interval '10 minute') as time_group,
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AVG(temperature) as temperature,
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AVG(humidity) as humidity,
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AVG(pressure) as pressure,
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AVG(wind_speed) as wind_speed,
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AVG(wind_direction) as wind_direction,
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MAX(rainfall) - MIN(rainfall) as rainfall,
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AVG(light) as light,
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AVG(uv) as uv
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FROM rs485_weather_data
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WHERE station_id = $1 AND timestamp BETWEEN $2 AND $3
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GROUP BY time_group
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ORDER BY time_group
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)
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SELECT
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to_char(time_group, 'YYYY-MM-DD HH24:MI:SS') as date_time,
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temperature, humidity, pressure, wind_speed, wind_direction,
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CASE WHEN rainfall < 0 THEN 0 ELSE rainfall END as rainfall,
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light, uv
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FROM grouped_data
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ORDER BY time_group`
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case "30min":
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query = `
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WITH grouped_data AS (
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SELECT
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date_trunc('hour', timestamp) +
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(floor(date_part('minute', timestamp) / 30) * interval '30 minute') as time_group,
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AVG(temperature) as temperature,
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AVG(humidity) as humidity,
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AVG(pressure) as pressure,
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AVG(wind_speed) as wind_speed,
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AVG(wind_direction) as wind_direction,
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MAX(rainfall) - MIN(rainfall) as rainfall,
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AVG(light) as light,
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AVG(uv) as uv
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FROM rs485_weather_data
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WHERE station_id = $1 AND timestamp BETWEEN $2 AND $3
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GROUP BY time_group
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ORDER BY time_group
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)
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SELECT
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to_char(time_group, 'YYYY-MM-DD HH24:MI:SS') as date_time,
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temperature, humidity, pressure, wind_speed, wind_direction,
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CASE WHEN rainfall < 0 THEN 0 ELSE rainfall END as rainfall,
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light, uv
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FROM grouped_data
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ORDER BY time_group`
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default: // 1hour
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query = `
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WITH grouped_data AS (
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SELECT
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date_trunc('hour', timestamp) as time_group,
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AVG(temperature) as temperature,
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AVG(humidity) as humidity,
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AVG(pressure) as pressure,
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AVG(wind_speed) as wind_speed,
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AVG(wind_direction) as wind_direction,
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MAX(rainfall) - MIN(rainfall) as rainfall,
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AVG(light) as light,
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AVG(uv) as uv
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FROM rs485_weather_data
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WHERE station_id = $1 AND timestamp BETWEEN $2 AND $3
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GROUP BY time_group
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ORDER BY time_group
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)
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SELECT
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to_char(time_group, 'YYYY-MM-DD HH24:MI:SS') as date_time,
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temperature, humidity, pressure, wind_speed, wind_direction,
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CASE WHEN rainfall < 0 THEN 0 ELSE rainfall END as rainfall,
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light, uv
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FROM grouped_data
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ORDER BY time_group`
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}
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// 执行查询
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rows, err := ginDB.Query(query, stationID, startTime, endTime)
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if err != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "查询数据失败"})
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return
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}
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defer rows.Close()
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var weatherPoints []WeatherPoint
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for rows.Next() {
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var point WeatherPoint
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err := rows.Scan(
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&point.DateTime,
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&point.Temperature,
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&point.Humidity,
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&point.Pressure,
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&point.WindSpeed,
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&point.WindDir,
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&point.Rainfall,
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&point.Light,
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&point.UV,
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)
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if err != nil {
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continue
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}
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weatherPoints = append(weatherPoints, point)
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}
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c.JSON(http.StatusOK, weatherPoints)
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}
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func StartGinServer() {
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err := initGinDB()
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if err != nil {
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fmt.Printf("初始化Gin数据库连接失败: %v\n", err)
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return
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}
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// 设置Gin模式
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gin.SetMode(gin.ReleaseMode)
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// 创建Gin引擎
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r := gin.Default()
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// 加载HTML模板
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r.LoadHTMLGlob("templates/*")
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// 静态文件服务
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r.Static("/static", "./static")
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// 路由设置
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r.GET("/", indexHandler)
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// API路由组
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api := r.Group("/api")
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{
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api.GET("/system/status", systemStatusHandler)
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api.GET("/stations", getStationsHandler)
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api.GET("/data", getDataHandler)
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}
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// 启动服务器
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fmt.Println("Gin Web服务器启动，监听端口 10003...")
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r.Run(":10003")
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}
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