586 lines
18 KiB
Go
586 lines
18 KiB
Go
package radar
|
||
|
||
import (
|
||
"context"
|
||
"encoding/json"
|
||
"errors"
|
||
"fmt"
|
||
"io"
|
||
"log"
|
||
"net/http"
|
||
neturl "net/url"
|
||
"os"
|
||
"path/filepath"
|
||
"regexp"
|
||
"strings"
|
||
"time"
|
||
"weatherstation/internal/config"
|
||
"weatherstation/internal/database"
|
||
)
|
||
|
||
// Options controls the radar scheduler behavior.
|
||
type Options struct {
|
||
Enable bool
|
||
OutputDir string
|
||
Delay time.Duration // time after each 6-minute boundary to trigger download
|
||
BaseURL string // optional: where to download from (template-based)
|
||
MaxRetries int
|
||
// Tile indices (4326 pyramid). Defaults: z=7,y=40,x=102 (Nanning region example)
|
||
Z int
|
||
Y int
|
||
X int
|
||
// StoreToDB controls whether to store fetched tiles into PostgreSQL `radar_tiles`.
|
||
StoreToDB bool
|
||
}
|
||
|
||
// Start starts the radar download scheduler. It reads options from env if zero value provided.
|
||
// Env vars:
|
||
//
|
||
// RADAR_ENABLED=true|false (default: true)
|
||
// RADAR_DIR=radar_data (default)
|
||
// RADAR_DELAY_SEC=120 (2 minutes; trigger after each boundary)
|
||
// RADAR_MAX_RETRIES=2
|
||
// RADAR_BASE_URL=<template URL, optional>
|
||
func Start(ctx context.Context, opts Options) error {
|
||
if !opts.Enable && !envEnabledDefaultTrue() {
|
||
log.Println("[radar] scheduler disabled")
|
||
return nil
|
||
}
|
||
|
||
if opts.OutputDir == "" {
|
||
opts.OutputDir = getenvDefault("RADAR_DIR", "radar_data")
|
||
}
|
||
// Delay 不再用于 10 分钟调度流程，这里保留读取但不使用
|
||
if opts.Delay == 0 {
|
||
delaySec := getenvIntDefault("RADAR_DELAY_SEC", 0)
|
||
opts.Delay = time.Duration(delaySec) * time.Second
|
||
}
|
||
if opts.MaxRetries == 0 {
|
||
opts.MaxRetries = getenvIntDefault("RADAR_MAX_RETRIES", 2)
|
||
}
|
||
if opts.BaseURL == "" {
|
||
// Default to CMA image server tiles
|
||
// Placeholders: %Y %m %d %H %M {z} {y} {x}
|
||
opts.BaseURL = getenvDefault("RADAR_BASE_URL", "https://image.data.cma.cn/tiles/China/RADAR_L3_MST_CREF_GISJPG_Tiles_CR/%Y%m%d/%H/%M/{z}/{y}/{x}.bin")
|
||
}
|
||
if opts.Z == 0 && opts.Y == 0 && opts.X == 0 {
|
||
// Default tile requested
|
||
opts.Z, opts.Y, opts.X = getenvIntDefault("RADAR_Z", 7), getenvIntDefault("RADAR_Y", 40), getenvIntDefault("RADAR_X", 102)
|
||
}
|
||
|
||
if err := os.MkdirAll(opts.OutputDir, 0o755); err != nil {
|
||
return fmt.Errorf("create radar output dir: %w", err)
|
||
}
|
||
|
||
loc, _ := time.LoadLocation("Asia/Shanghai")
|
||
if loc == nil {
|
||
loc = time.FixedZone("CST", 8*3600)
|
||
}
|
||
|
||
// 先立即执行一次（不延迟）：拉取一次瓦片并抓取一次彩云实况
|
||
go func() {
|
||
if err := runOnceFromNMC(ctx, opts); err != nil {
|
||
log.Printf("[radar] first run error: %v", err)
|
||
}
|
||
}()
|
||
// 瓦片：每3分钟查询一次
|
||
go loop3(ctx, loc, opts)
|
||
// 实况：每10分钟一次
|
||
go loop10(ctx, loc, opts)
|
||
log.Printf("[radar] scheduler started (tiles=3m, realtime=10m, dir=%s, tile=%d/%d/%d)", opts.OutputDir, opts.Z, opts.Y, opts.X)
|
||
return nil
|
||
}
|
||
|
||
func loop10(ctx context.Context, loc *time.Location, opts Options) {
|
||
for {
|
||
if ctx.Err() != nil {
|
||
return
|
||
}
|
||
now := time.Now().In(loc)
|
||
// 对齐到10分钟边界
|
||
runAt := roundDownN(now, 10*time.Minute).Add(10 * time.Minute)
|
||
sleep := time.Until(runAt)
|
||
if sleep < 0 {
|
||
sleep = 0
|
||
}
|
||
timer := time.NewTimer(sleep)
|
||
select {
|
||
case <-ctx.Done():
|
||
timer.Stop()
|
||
return
|
||
case <-timer.C:
|
||
if err := runRealtimeFromCaiyun(ctx); err != nil {
|
||
log.Printf("[radar] realtime run error: %v", err)
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
// 每3分钟的瓦片轮询
|
||
func loop3(ctx context.Context, loc *time.Location, opts Options) {
|
||
for {
|
||
if ctx.Err() != nil {
|
||
return
|
||
}
|
||
now := time.Now().In(loc)
|
||
runAt := roundDownN(now, 3*time.Minute).Add(3 * time.Minute)
|
||
sleep := time.Until(runAt)
|
||
if sleep < 0 {
|
||
sleep = 0
|
||
}
|
||
timer := time.NewTimer(sleep)
|
||
select {
|
||
case <-ctx.Done():
|
||
timer.Stop()
|
||
return
|
||
case <-timer.C:
|
||
if err := runTilesFromNMC(ctx, opts); err != nil {
|
||
log.Printf("[radar] tiles run error: %v", err)
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
func tryStartupCatchup(ctx context.Context, loc *time.Location, opts Options) {
|
||
now := time.Now().In(loc)
|
||
lastSlot := roundDown6(now).Add(-opts.Delay)
|
||
_ = downloadForSlot(ctx, lastSlot, opts)
|
||
}
|
||
|
||
// roundDown6 returns t truncated to the nearest lower multiple of 6 minutes.
|
||
func roundDown6(t time.Time) time.Time {
|
||
// Truncate supports arbitrary durations.
|
||
return t.Truncate(6 * time.Minute)
|
||
}
|
||
|
||
func roundDownN(t time.Time, d time.Duration) time.Time {
|
||
return t.Truncate(d)
|
||
}
|
||
|
||
// downloadForSlot performs the actual download for the given nominal run time.
|
||
// It constructs a filename like: radar_COMP_20060102_1504.png under opts.OutputDir.
|
||
// If RADAR_BASE_URL is provided, it's treated as a format string with Go time
|
||
// layout tokens, e.g. https://example/COMP/%Y/%m/%d/%H%M.png (Go layout applied).
|
||
func downloadForSlot(ctx context.Context, runAt time.Time, opts Options) error {
|
||
// Determine the product nominal time: align to boundary (6-minute steps)
|
||
slot := roundDown6(runAt)
|
||
fname := fmt.Sprintf("radar_z%d_y%d_x%d_%s.bin", opts.Z, opts.Y, opts.X, slot.Format("20060102_1504"))
|
||
dest := filepath.Join(opts.OutputDir, fname)
|
||
|
||
// If file already exists, skip.
|
||
if _, err := os.Stat(dest); err == nil {
|
||
return nil
|
||
}
|
||
|
||
if opts.BaseURL == "" {
|
||
// No remote configured: create a placeholder to prove scheduling works.
|
||
content := []byte(fmt.Sprintf("placeholder for %s\n", slot.Format(time.RFC3339)))
|
||
if err := os.WriteFile(dest, content, 0o644); err != nil {
|
||
return fmt.Errorf("write placeholder: %w", err)
|
||
}
|
||
log.Printf("[radar] wrote placeholder %s", dest)
|
||
return nil
|
||
}
|
||
|
||
// Convert a possibly strftime-like template to Go layout tokens.
|
||
url := buildURLFromTemplate(opts.BaseURL, slot, opts.Z, opts.Y, opts.X)
|
||
// HTTP GET with timeout.
|
||
client := &http.Client{Timeout: 20 * time.Second}
|
||
req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
|
||
if err != nil {
|
||
return fmt.Errorf("build request: %w", err)
|
||
}
|
||
// CMA requires referer/origin headers typically
|
||
req.Header.Set("Referer", "https://data.cma.cn/")
|
||
req.Header.Set("Origin", "https://data.cma.cn")
|
||
req.Header.Set("User-Agent", "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36")
|
||
resp, err := client.Do(req)
|
||
if err != nil {
|
||
return fmt.Errorf("http get: %w", err)
|
||
}
|
||
defer resp.Body.Close()
|
||
if resp.StatusCode != http.StatusOK {
|
||
return fmt.Errorf("unexpected status: %d", resp.StatusCode)
|
||
}
|
||
// Write to temp then rename.
|
||
tmp := dest + ".part"
|
||
f, err := os.Create(tmp)
|
||
if err != nil {
|
||
return fmt.Errorf("create temp: %w", err)
|
||
}
|
||
_, copyErr := io.Copy(f, resp.Body)
|
||
closeErr := f.Close()
|
||
if copyErr != nil {
|
||
_ = os.Remove(tmp)
|
||
return fmt.Errorf("write body: %w", copyErr)
|
||
}
|
||
if closeErr != nil {
|
||
_ = os.Remove(tmp)
|
||
return fmt.Errorf("close temp: %w", closeErr)
|
||
}
|
||
if err := os.Rename(tmp, dest); err != nil {
|
||
// If cross-device rename fails, fallback to copy
|
||
if !errors.Is(err, os.ErrInvalid) {
|
||
return fmt.Errorf("rename: %w", err)
|
||
}
|
||
data, rerr := os.ReadFile(tmp)
|
||
if rerr != nil {
|
||
return fmt.Errorf("read temp for copy: %w", rerr)
|
||
}
|
||
if werr := os.WriteFile(dest, data, 0o644); werr != nil {
|
||
return fmt.Errorf("write final: %w", werr)
|
||
}
|
||
_ = os.Remove(tmp)
|
||
}
|
||
log.Printf("[radar] saved %s (url=%s)", dest, url)
|
||
|
||
// Optionally store to DB
|
||
if opts.StoreToDB {
|
||
// Read the just-written bytes to pass to DB store; alternatively stream earlier
|
||
b, rerr := os.ReadFile(dest)
|
||
if rerr != nil {
|
||
return fmt.Errorf("read saved tile for DB: %w", rerr)
|
||
}
|
||
if err := StoreTileBytes(ctx, url, b); err != nil {
|
||
return fmt.Errorf("store tile to DB: %w", err)
|
||
}
|
||
log.Printf("[radar] stored to DB: z=%d y=%d x=%d t=%s", opts.Z, opts.Y, opts.X, slot.Format("2006-01-02 15:04"))
|
||
}
|
||
return nil
|
||
}
|
||
|
||
func buildURLFromTemplate(tpl string, t time.Time, z, y, x int) string {
|
||
// Support a minimal subset of strftime tokens to Go layout.
|
||
repl := map[string]string{
|
||
"%Y": "2006",
|
||
"%m": "01",
|
||
"%d": "02",
|
||
"%H": "15",
|
||
"%M": "04",
|
||
}
|
||
out := tpl
|
||
for k, v := range repl {
|
||
out = strings.ReplaceAll(out, k, t.Format(v))
|
||
}
|
||
// Replace index placeholders
|
||
out = strings.ReplaceAll(out, "{z}", fmt.Sprintf("%d", z))
|
||
out = strings.ReplaceAll(out, "{y}", fmt.Sprintf("%d", y))
|
||
out = strings.ReplaceAll(out, "{x}", fmt.Sprintf("%d", x))
|
||
return out
|
||
}
|
||
|
||
// ------------------- NMC -> CMA pipeline -------------------
|
||
|
||
type nmcRadar struct {
|
||
Title string `json:"title"`
|
||
Image string `json:"image"`
|
||
URL string `json:"url"`
|
||
}
|
||
|
||
type nmcResp struct {
|
||
Radar nmcRadar `json:"radar"`
|
||
}
|
||
|
||
var reDigits17 = regexp.MustCompile(`([0-9]{17})`)
|
||
|
||
// runOnceFromNMC fetches NMC JSON, extracts timestamp, shifts +8h, then downloads CMA tile for opts.Z/Y/X.
|
||
func runOnceFromNMC(ctx context.Context, opts Options) error {
|
||
// 保留原语义：两者都执行
|
||
if err := runTilesFromNMC(ctx, opts); err != nil {
|
||
return err
|
||
}
|
||
return runRealtimeFromCaiyun(ctx)
|
||
}
|
||
|
||
// 仅瓦片下载：查询 NMC，解析时间，按该时刻下载 CMA 瓦片（若DB已存在则跳过）
|
||
func runTilesFromNMC(ctx context.Context, opts Options) error {
|
||
// 1) Fetch NMC JSON
|
||
api := "https://www.nmc.cn/rest/weather?stationid=Wqsps"
|
||
client := &http.Client{Timeout: 15 * time.Second}
|
||
req, err := http.NewRequestWithContext(ctx, http.MethodGet, api, nil)
|
||
if err != nil {
|
||
return fmt.Errorf("nmc request: %w", err)
|
||
}
|
||
req.Header.Set("Referer", "https://www.nmc.cn/")
|
||
req.Header.Set("User-Agent", "Mozilla/5.0")
|
||
resp, err := client.Do(req)
|
||
if err != nil {
|
||
return fmt.Errorf("nmc get: %w", err)
|
||
}
|
||
defer resp.Body.Close()
|
||
if resp.StatusCode != http.StatusOK {
|
||
return fmt.Errorf("nmc status: %d", resp.StatusCode)
|
||
}
|
||
// 仅从 data.radar.image 读取
|
||
var top struct {
|
||
Data struct {
|
||
Radar nmcRadar `json:"radar"`
|
||
} `json:"data"`
|
||
}
|
||
if err := json.NewDecoder(resp.Body).Decode(&top); err != nil {
|
||
return fmt.Errorf("nmc decode: %w", err)
|
||
}
|
||
img := top.Data.Radar.Image
|
||
if img == "" {
|
||
return fmt.Errorf("nmc data.radar.image empty")
|
||
}
|
||
|
||
// 2) Extract filename and 17-digit timestamp from image
|
||
// Example: /product/2025/09/23/RDCP/SEVP_AOC_RDCP_SLDAS3_ECREF_ANCN_L88_PI_20250923033600000.PNG?v=...
|
||
// filename: SEVP_AOC_RDCP_SLDAS3_ECREF_ANCN_L88_PI_20250923033600000.PNG
|
||
// digits: 20250923033600000 -> use first 12 as yyyyMMddHHmm
|
||
if u, err := neturl.Parse(img); err == nil { // strip query if present
|
||
img = u.Path
|
||
}
|
||
parts := strings.Split(img, "/")
|
||
fname := parts[len(parts)-1]
|
||
digits := reDigits17.FindString(fname)
|
||
if digits == "" {
|
||
return fmt.Errorf("no 17-digit timestamp in %s", fname)
|
||
}
|
||
// Parse yyyyMMddHHmm from first 12 digits as UTC, then +8h
|
||
utc12 := digits[:12]
|
||
utcT, err := time.ParseInLocation("200601021504", utc12, time.UTC)
|
||
if err != nil {
|
||
return fmt.Errorf("parse utc time: %w", err)
|
||
}
|
||
local := utcT.Add(8 * time.Hour)
|
||
|
||
// 3) Build CMA tile URL(s) for fixed z/y/x
|
||
dateStr := local.Format("20060102")
|
||
hh := local.Format("15")
|
||
mm := local.Format("04")
|
||
// Prepare tile list: primary (opts or default Nanning) + Guangzhou (7/40/104)
|
||
z, y, x := opts.Z, opts.Y, opts.X
|
||
if z == 0 && y == 0 && x == 0 {
|
||
z, y, x = 7, 40, 102
|
||
}
|
||
type tcoord struct{ z, y, x int }
|
||
tiles := []tcoord{{z, y, x}, {7, 40, 104}}
|
||
// de-duplicate if same
|
||
seen := map[string]bool{}
|
||
for _, tc := range tiles {
|
||
key := fmt.Sprintf("%d/%d/%d", tc.z, tc.y, tc.x)
|
||
if seen[key] {
|
||
continue
|
||
}
|
||
seen[key] = true
|
||
if err := downloadAndStoreTile(ctx, local, dateStr, hh, mm, tc.z, tc.y, tc.x, opts); err != nil {
|
||
log.Printf("[radar] download/store %s failed: %v", key, err)
|
||
}
|
||
}
|
||
|
||
return nil
|
||
}
|
||
|
||
// 仅彩云实况（10分钟一次）
|
||
func runRealtimeFromCaiyun(ctx context.Context) error {
|
||
if err := fetchAndStoreRadarRealtimeFor(ctx, "南宁雷达站", 23.097234, 108.715433); err != nil {
|
||
log.Printf("[radar] realtime(NN) failed: %v", err)
|
||
}
|
||
if err := fetchAndStoreRadarRealtimeFor(ctx, "广州雷达站", 23.146400, 113.341200); err != nil {
|
||
log.Printf("[radar] realtime(GZ) failed: %v", err)
|
||
}
|
||
if err := fetchAndStoreRadarRealtimeFor(ctx, "海珠雷达站", 23.090000, 113.350000); err != nil {
|
||
log.Printf("[radar] realtime(HAIZHU) failed: %v", err)
|
||
}
|
||
if err := fetchAndStoreRadarRealtimeFor(ctx, "番禺雷达站", 23.022500, 113.331300); err != nil {
|
||
log.Printf("[radar] realtime(PANYU) failed: %v", err)
|
||
}
|
||
|
||
// WH65LP 设备批量
|
||
token := os.Getenv("CAIYUN_TOKEN")
|
||
if token == "" {
|
||
token = config.GetConfig().Forecast.CaiyunToken
|
||
}
|
||
if token == "" {
|
||
log.Printf("[radar] skip station realtime: missing CAIYUN_TOKEN")
|
||
return nil
|
||
}
|
||
coords, err := database.ListWH65LPStationsWithLatLon(ctx, database.GetDB())
|
||
if err != nil {
|
||
log.Printf("[radar] list WH65LP stations failed: %v", err)
|
||
return nil
|
||
}
|
||
for _, s := range coords {
|
||
if err := fetchAndStoreRadarRealtimeFor(ctx, s.StationID, s.Lat, s.Lon); err != nil {
|
||
log.Printf("[radar] realtime(station=%s) failed: %v", s.StationID, err)
|
||
}
|
||
}
|
||
return nil
|
||
}
|
||
|
||
func downloadAndStoreTile(ctx context.Context, local time.Time, dateStr, hh, mm string, z, y, x int, opts Options) error {
|
||
url := fmt.Sprintf("https://image.data.cma.cn/tiles/China/RADAR_L3_MST_CREF_GISJPG_Tiles_CR/%s/%s/%s/%d/%d/%d.bin", dateStr, hh, mm, z, y, x)
|
||
// 若数据库已有该瓦片则跳过
|
||
if ref, err := ParseCMATileURL(url); err == nil {
|
||
exists, err := database.HasRadarTile(ctx, database.GetDB(), ref.Product, ref.DT, ref.Z, ref.Y, ref.X)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
if exists {
|
||
log.Printf("[radar] skip existing tile in DB: %s %s z=%d y=%d x=%d", ref.Product, ref.DT.Format("2006-01-02 15:04"), ref.Z, ref.Y, ref.X)
|
||
return nil
|
||
}
|
||
}
|
||
fnameOut := fmt.Sprintf("radar_z%d_y%d_x%d_%s.bin", z, y, x, local.Format("20060102_1504"))
|
||
dest := filepath.Join(opts.OutputDir, fnameOut)
|
||
if _, err := os.Stat(dest); err == nil {
|
||
return nil // already exists
|
||
}
|
||
if err := httpDownloadTo(ctx, url, dest); err != nil {
|
||
return err
|
||
}
|
||
log.Printf("[radar] saved %s (url=%s)", dest, url)
|
||
if opts.StoreToDB {
|
||
b, rerr := os.ReadFile(dest)
|
||
if rerr != nil {
|
||
return fmt.Errorf("read saved tile: %w", rerr)
|
||
}
|
||
if err := StoreTileBytes(ctx, url, b); err != nil {
|
||
return fmt.Errorf("store tile db: %w", err)
|
||
}
|
||
log.Printf("[radar] stored to DB: %s", fnameOut)
|
||
}
|
||
return nil
|
||
}
|
||
|
||
func httpDownloadTo(ctx context.Context, url, dest string) error {
|
||
client := &http.Client{Timeout: 20 * time.Second}
|
||
req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
|
||
if err != nil {
|
||
return fmt.Errorf("build request: %w", err)
|
||
}
|
||
req.Header.Set("Referer", "https://data.cma.cn/")
|
||
req.Header.Set("Origin", "https://data.cma.cn")
|
||
req.Header.Set("User-Agent", "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36")
|
||
resp, err := client.Do(req)
|
||
if err != nil {
|
||
return fmt.Errorf("http get: %w", err)
|
||
}
|
||
defer resp.Body.Close()
|
||
if resp.StatusCode != http.StatusOK {
|
||
return fmt.Errorf("unexpected status: %d", resp.StatusCode)
|
||
}
|
||
tmp := dest + ".part"
|
||
f, err := os.Create(tmp)
|
||
if err != nil {
|
||
return fmt.Errorf("create temp: %w", err)
|
||
}
|
||
_, copyErr := io.Copy(f, resp.Body)
|
||
closeErr := f.Close()
|
||
if copyErr != nil {
|
||
_ = os.Remove(tmp)
|
||
return fmt.Errorf("write body: %w", copyErr)
|
||
}
|
||
if closeErr != nil {
|
||
_ = os.Remove(tmp)
|
||
return fmt.Errorf("close temp: %w", closeErr)
|
||
}
|
||
if err := os.Rename(tmp, dest); err != nil {
|
||
return fmt.Errorf("rename: %w", err)
|
||
}
|
||
return nil
|
||
}
|
||
|
||
//
|
||
|
||
// fetchAndStoreRadarRealtime calls Caiyun realtime API for the Nanning radar station
|
||
// and stores selected fields into table `radar_weather` with 10-minute bucketed dt.
|
||
func fetchAndStoreRadarRealtimeFor(ctx context.Context, alias string, lat, lon float64) error {
|
||
// Token: prefer env CAIYUN_TOKEN, else config
|
||
token := os.Getenv("CAIYUN_TOKEN")
|
||
if token == "" {
|
||
token = config.GetConfig().Forecast.CaiyunToken
|
||
}
|
||
if token == "" {
|
||
return fmt.Errorf("missing CAIYUN_TOKEN for Caiyun realtime API")
|
||
}
|
||
|
||
// Build URL: lon,lat order; metric units
|
||
api := fmt.Sprintf("https://api.caiyunapp.com/v2.6/%s/%.6f,%.6f/realtime?lang=zh_CN&unit=metric", token, lon, lat)
|
||
client := &http.Client{Timeout: 12 * time.Second}
|
||
req, err := http.NewRequestWithContext(ctx, http.MethodGet, api, nil)
|
||
if err != nil {
|
||
return fmt.Errorf("build realtime request: %w", err)
|
||
}
|
||
resp, err := client.Do(req)
|
||
if err != nil {
|
||
return fmt.Errorf("realtime http get: %w", err)
|
||
}
|
||
defer resp.Body.Close()
|
||
if resp.StatusCode != http.StatusOK {
|
||
return fmt.Errorf("realtime status: %d", resp.StatusCode)
|
||
}
|
||
|
||
var payload struct {
|
||
Status string `json:"status"`
|
||
Result struct {
|
||
Realtime struct {
|
||
Temperature float64 `json:"temperature"`
|
||
Humidity float64 `json:"humidity"`
|
||
Cloudrate float64 `json:"cloudrate"`
|
||
Visibility float64 `json:"visibility"`
|
||
Dswrf float64 `json:"dswrf"`
|
||
Wind struct {
|
||
Speed float64 `json:"speed"`
|
||
Direction float64 `json:"direction"`
|
||
} `json:"wind"`
|
||
Pressure float64 `json:"pressure"`
|
||
} `json:"realtime"`
|
||
} `json:"result"`
|
||
}
|
||
if err := json.NewDecoder(resp.Body).Decode(&payload); err != nil {
|
||
return fmt.Errorf("decode realtime: %w", err)
|
||
}
|
||
if payload.Status != "ok" {
|
||
return fmt.Errorf("realtime api status=%s", payload.Status)
|
||
}
|
||
|
||
// Align to 10-minute bucket in Asia/Shanghai
|
||
loc, _ := time.LoadLocation("Asia/Shanghai")
|
||
if loc == nil {
|
||
loc = time.FixedZone("CST", 8*3600)
|
||
}
|
||
dt := roundDownN(time.Now().In(loc), 10*time.Minute)
|
||
|
||
// Store
|
||
db := database.GetDB()
|
||
rt := payload.Result.Realtime
|
||
// Caiyun wind.speed is in km/h under metric; convert to m/s for storage/display
|
||
windSpeedMS := rt.Wind.Speed / 3.6
|
||
return database.UpsertRadarWeather(ctx, db, alias, lat, lon, dt,
|
||
rt.Temperature, rt.Humidity, rt.Cloudrate, rt.Visibility, rt.Dswrf,
|
||
windSpeedMS, rt.Wind.Direction, rt.Pressure,
|
||
)
|
||
}
|
||
|
||
func envEnabledDefaultTrue() bool {
|
||
v := strings.ToLower(strings.TrimSpace(os.Getenv("RADAR_ENABLED")))
|
||
if v == "" {
|
||
return true
|
||
}
|
||
return v == "1" || v == "true" || v == "yes" || v == "on"
|
||
}
|
||
|
||
func getenvDefault(key, def string) string {
|
||
v := os.Getenv(key)
|
||
if v == "" {
|
||
return def
|
||
}
|
||
return v
|
||
}
|
||
|
||
func getenvIntDefault(key string, def int) int {
|
||
v := os.Getenv(key)
|
||
if v == "" {
|
||
return def
|
||
}
|
||
var n int
|
||
_, err := fmt.Sscanf(v, "%d", &n)
|
||
if err != nil {
|
||
return def
|
||
}
|
||
return n
|
||
}
|