mirror of https://github.com/cloudreve/Cloudreve
138 lines
3.2 KiB
Go
138 lines
3.2 KiB
Go
package obs
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import (
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"context"
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"encoding/json"
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"fmt"
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"math"
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"net/http"
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"strconv"
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"strings"
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"time"
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"github.com/cloudreve/Cloudreve/v4/pkg/filemanager/driver"
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"github.com/cloudreve/Cloudreve/v4/pkg/mediameta"
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"github.com/cloudreve/Cloudreve/v4/pkg/request"
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"github.com/huaweicloud/huaweicloud-sdk-go-obs/obs"
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"github.com/samber/lo"
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)
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func (d *Driver) MediaMeta(ctx context.Context, path, ext string) ([]driver.MediaMeta, error) {
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thumbURL, err := d.signSourceURL(&obs.CreateSignedUrlInput{
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Method: obs.HttpMethodGet,
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Bucket: d.policy.BucketName,
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Key: path,
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Expires: int(mediaInfoTTL.Seconds()),
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QueryParams: map[string]string{
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imageProcessHeader: imageInfoProcessor,
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},
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})
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if err != nil {
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return nil, fmt.Errorf("failed to sign media info url: %w", err)
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}
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resp, err := d.httpClient.
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Request(http.MethodGet, thumbURL, nil, request.WithContext(ctx)).
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CheckHTTPResponse(http.StatusOK).
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GetResponseIgnoreErr()
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if err != nil {
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return nil, handleJsonError(resp, err)
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}
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var imageInfo map[string]any
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if err := json.Unmarshal([]byte(resp), &imageInfo); err != nil {
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return nil, fmt.Errorf("failed to unmarshal media info: %w", err)
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}
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imageInfoMap := lo.MapEntries(imageInfo, func(k string, v any) (string, string) {
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if vStr, ok := v.(string); ok {
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return strings.TrimPrefix(k, "exif:"), vStr
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}
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return k, fmt.Sprintf("%v", v)
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})
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metas := make([]driver.MediaMeta, 0)
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metas = append(metas, mediameta.ExtractExifMap(imageInfoMap, time.Time{})...)
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metas = append(metas, parseGpsInfo(imageInfoMap)...)
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for i := 0; i < len(metas); i++ {
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metas[i].Type = driver.MetaTypeExif
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}
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return metas, nil
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}
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func parseGpsInfo(imageInfo map[string]string) []driver.MediaMeta {
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latitude := imageInfo["GPSLatitude"] // 31/1, 162680820/10000000, 0/1
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longitude := imageInfo["GPSLongitude"] // 120/1, 429103939/10000000, 0/1
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latRef := imageInfo["GPSLatitudeRef"] // N
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lonRef := imageInfo["GPSLongitudeRef"] // E
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// Make sure all value exist in map
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if latitude == "" || longitude == "" || latRef == "" || lonRef == "" {
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return nil
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}
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lat := parseRawGPS(latitude, latRef)
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lon := parseRawGPS(longitude, lonRef)
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if !math.IsNaN(lat) && !math.IsNaN(lon) {
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lat, lng := mediameta.NormalizeGPS(lat, lon)
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return []driver.MediaMeta{{
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Key: mediameta.GpsLat,
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Value: fmt.Sprintf("%f", lat),
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}, {
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Key: mediameta.GpsLng,
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Value: fmt.Sprintf("%f", lng),
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}}
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}
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return nil
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}
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func parseRawGPS(gpsStr string, ref string) float64 {
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elem := strings.Split(gpsStr, ", ")
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if len(elem) < 1 {
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return 0
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}
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var (
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deg float64
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minutes float64
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seconds float64
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)
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deg = getGpsElemValue(elem[0])
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if len(elem) >= 2 {
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minutes = getGpsElemValue(elem[1])
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}
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if len(elem) >= 3 {
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seconds = getGpsElemValue(elem[2])
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}
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decimal := deg + minutes/60.0 + seconds/3600.0
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if ref == "S" || ref == "W" {
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return -decimal
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}
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return decimal
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}
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func getGpsElemValue(elm string) float64 {
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elements := strings.Split(elm, "/")
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if len(elements) != 2 {
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return 0
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}
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numerator, err := strconv.ParseFloat(elements[0], 64)
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if err != nil {
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return 0
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}
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denominator, err := strconv.ParseFloat(elements[1], 64)
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if err != nil || denominator == 0 {
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return 0
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}
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return numerator / denominator
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}
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