Init V4 community edition (#2265)

* Init V4 community edition

* Init V4 community edition

pkg/filemanager/driver/upyun/media.go

@@ -0,0 +1,154 @@
+package upyun
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"github.com/cloudreve/Cloudreve/v4/pkg/filemanager/driver"
+	"github.com/cloudreve/Cloudreve/v4/pkg/mediameta"
+	"github.com/cloudreve/Cloudreve/v4/pkg/request"
+	"github.com/samber/lo"
+	"math"
+	"net/http"
+	"strconv"
+	"strings"
+	"time"
+)
+
+var (
+	mediaInfoTTL = time.Duration(10) * time.Minute
+)
+
+type (
+	ImageInfo struct {
+		Exif map[string]string `json:"EXIF"`
+	}
+)
+
+func (handler *Driver) extractImageMeta(ctx context.Context, path string) ([]driver.MediaMeta, error) {
+	resp, err := handler.extractMediaInfo(ctx, path, "!/meta")
+	if err != nil {
+		return nil, err
+	}
+
+	fmt.Println(resp)
+
+	var imageInfo ImageInfo
+	if err := json.Unmarshal([]byte(resp), &imageInfo); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal image info: %w", err)
+	}
+
+	metas := make([]driver.MediaMeta, 0, len(imageInfo.Exif))
+	exifMap := lo.MapEntries(imageInfo.Exif, func(key string, value string) (string, string) {
+		switch key {
+		case "0xA434":
+			key = "LensModel"
+		}
+		return key, value
+	})
+	metas = append(metas, mediameta.ExtractExifMap(exifMap, time.Time{})...)
+	metas = append(metas, parseGpsInfo(imageInfo.Exif)...)
+
+	for i := 0; i < len(metas); i++ {
+		metas[i].Type = driver.MetaTypeExif
+	}
+
+	return metas, nil
+}
+
+func (handler *Driver) extractMediaInfo(ctx context.Context, path string, param string) (string, error) {
+	mediaInfoExpire := time.Now().Add(mediaInfoTTL)
+	mediaInfoUrl, err := handler.signURL(ctx, path+param, nil, &mediaInfoExpire)
+	if err != nil {
+		return "", err
+	}
+
+	resp, err := handler.httpClient.
+		Request(http.MethodGet, mediaInfoUrl, nil, request.WithContext(ctx)).
+		CheckHTTPResponse(http.StatusOK).
+		GetResponseIgnoreErr()
+	if err != nil {
+		return "", unmarshalError(resp, err)
+	}
+
+	return resp, nil
+}
+
+func unmarshalError(resp string, err error) error {
+	return fmt.Errorf("upyun error: %s", err)
+}
+
+func parseGpsInfo(imageInfo map[string]string) []driver.MediaMeta {
+	latitude := imageInfo["GPSLatitude"]   // 31/1, 162680820/10000000, 0/1
+	longitude := imageInfo["GPSLongitude"] // 120/1, 429103939/10000000, 0/1
+	latRef := imageInfo["GPSLatitudeRef"]  // N
+	lonRef := imageInfo["GPSLongitudeRef"] // E
+
+	// Make sure all value exist in map
+	if latitude == "" || longitude == "" || latRef == "" || lonRef == "" {
+		return nil
+	}
+
+	lat := parseRawGPS(latitude, latRef)
+	lon := parseRawGPS(longitude, lonRef)
+	if !math.IsNaN(lat) && !math.IsNaN(lon) {
+		lat, lng := mediameta.NormalizeGPS(lat, lon)
+		return []driver.MediaMeta{{
+			Key:   mediameta.GpsLat,
+			Value: fmt.Sprintf("%f", lat),
+		}, {
+			Key:   mediameta.GpsLng,
+			Value: fmt.Sprintf("%f", lng),
+		}}
+	}
+
+	return nil
+}
+
+func parseRawGPS(gpsStr string, ref string) float64 {
+	elem := strings.Split(gpsStr, ",")
+	if len(elem) < 1 {
+		return 0
+	}
+
+	var (
+		deg     float64
+		minutes float64
+		seconds float64
+	)
+
+	deg = getGpsElemValue(elem[0])
+	if len(elem) >= 2 {
+		minutes = getGpsElemValue(elem[1])
+	}
+	if len(elem) >= 3 {
+		seconds = getGpsElemValue(elem[2])
+	}
+
+	decimal := deg + minutes/60.0 + seconds/3600.0
+
+	if ref == "S" || ref == "W" {
+		return -decimal
+	}
+
+	return decimal
+}
+
+func getGpsElemValue(elm string) float64 {
+	elements := strings.Split(elm, "/")
+	if len(elements) != 2 {
+		return 0
+	}
+
+	numerator, err := strconv.ParseFloat(elements[0], 64)
+	if err != nil {
+		return 0
+	}
+
+	denominator, err := strconv.ParseFloat(elements[1], 64)
+	if err != nil || denominator == 0 {
+		return 0
+	}
+
+	return numerator / denominator
+}