first commit
This commit is contained in:
Beyhan Oğur
238
services/image_service.go
Normal file
238
services/image_service.go
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package services
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import (
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configs "ares/config"
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"mime/multipart"
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"net/http"
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"net/textproto"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/gofiber/fiber/v3"
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"go.uber.org/zap"
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)
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// ImageOptions defines the parameters for image processing
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type ImageOptions struct {
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Width int
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Height int
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Quality int
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Format string // "avif", "webp", "png", "jpg"
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Folder string // e.g. "settings", "heroes"
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}
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// --- Token cache for external image API ---
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var (
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imageAPIToken string
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imageAPITokenExp time.Time
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imageAPITokenMu sync.Mutex
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)
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func getImageAPIToken() (string, error) {
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if apiKey := strings.TrimSpace(configs.AppConfig.ImageAPIKey); apiKey != "" {
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configs.Logger.Debug("using image API key from config")
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return apiKey, nil
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}
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imageAPITokenMu.Lock()
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defer imageAPITokenMu.Unlock()
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if imageAPIToken != "" && time.Now().Before(imageAPITokenExp) {
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configs.Logger.Debug("using cached image API token", zap.Time("expires_at", imageAPITokenExp))
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return imageAPIToken, nil
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}
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payload, _ := json.Marshal(map[string]string{
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"email": configs.AppConfig.ImageAPIEmail,
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"password": configs.AppConfig.ImageAPIPassword,
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})
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resp, err := http.Post(
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configs.AppConfig.ImageAPIURL+"/api/v1/auth/login",
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"application/json",
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bytes.NewReader(payload),
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)
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if err != nil {
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return "", fmt.Errorf("image API login failed: %v", err)
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}
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defer resp.Body.Close()
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respBody, err := io.ReadAll(resp.Body)
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if err != nil {
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return "", fmt.Errorf("image API login body read error: %v", err)
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}
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configs.Logger.Info(
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"image API login response",
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zap.Int("status_code", resp.StatusCode),
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zap.String("body", string(respBody)),
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)
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var result struct {
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Data struct {
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AccessToken string `json:"accessToken"`
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} `json:"data"`
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}
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if err := json.Unmarshal(respBody, &result); err != nil {
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return "", fmt.Errorf("image API login decode error: %v", err)
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}
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if result.Data.AccessToken == "" {
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return "", fmt.Errorf("image API returned empty token")
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}
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imageAPIToken = result.Data.AccessToken
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imageAPITokenExp = time.Now().Add(6 * 24 * time.Hour) // 6 days (token valid for 7)
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return imageAPIToken, nil
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}
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func callImageAPI(buffer []byte, filename string, opts ImageOptions) (string, error) {
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token, err := getImageAPIToken()
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if err != nil {
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return "", err
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}
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configs.Logger.Debug(
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"callImageAPI started",
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zap.String("filename", filename),
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zap.Int("bytes", len(buffer)),
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zap.Int("width", opts.Width),
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zap.Int("height", opts.Height),
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zap.Int("quality", opts.Quality),
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zap.String("format", opts.Format),
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)
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var body bytes.Buffer
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w := multipart.NewWriter(&body)
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mimeType := http.DetectContentType(buffer)
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h := make(textproto.MIMEHeader)
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h.Set("Content-Disposition", fmt.Sprintf(`form-data; name="file"; filename="%s"`, filename))
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h.Set("Content-Type", mimeType)
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part, err := w.CreatePart(h)
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if err != nil {
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return "", err
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}
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if _, err := part.Write(buffer); err != nil {
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return "", err
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}
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if opts.Width > 0 {
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_ = w.WriteField("width", strconv.Itoa(opts.Width))
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}
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if opts.Height > 0 {
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_ = w.WriteField("height", strconv.Itoa(opts.Height))
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}
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if opts.Quality > 0 {
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_ = w.WriteField("quality", strconv.Itoa(opts.Quality))
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}
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format := strings.ToLower(strings.TrimSpace(opts.Format))
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if format == "" {
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format = "avif"
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}
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_ = w.WriteField("format", format)
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w.Close()
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req, err := http.NewRequest("POST", configs.AppConfig.ImageAPIURL+"/api/v1/images/upload", &body)
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if err != nil {
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return "", err
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}
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req.Header.Set("Content-Type", w.FormDataContentType())
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req.Header.Set("Authorization", "Bearer "+token)
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client := &http.Client{Timeout: 60 * time.Second}
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resp, err := client.Do(req)
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if err != nil {
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return "", fmt.Errorf("image API upload failed: %v", err)
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}
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defer resp.Body.Close()
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respBody, err := io.ReadAll(resp.Body)
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if err != nil {
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return "", fmt.Errorf("image API upload body read error: %v", err)
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}
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configs.Logger.Info(
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"image API upload response",
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zap.Int("status_code", resp.StatusCode),
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zap.String("body", string(respBody)),
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)
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if resp.StatusCode == http.StatusUnauthorized {
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return "", fmt.Errorf("image API key gecersiz veya suresi dolmus (HTTP 401)")
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}
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if resp.StatusCode < 200 || resp.StatusCode >= 300 {
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return "", fmt.Errorf("image API upload basarisiz (HTTP %d): %s", resp.StatusCode, strings.TrimSpace(string(respBody)))
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}
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var result struct {
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Data struct {
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Image struct {
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URL string `json:"url"`
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} `json:"image"`
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} `json:"data"`
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}
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if err := json.Unmarshal(respBody, &result); err != nil {
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return "", fmt.Errorf("image API response decode error: %v", err)
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}
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if result.Data.Image.URL == "" {
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return "", fmt.Errorf("image API returned empty URL (HTTP %d)", resp.StatusCode)
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}
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return result.Data.Image.URL, nil
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}
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// ProcessAndSaveImage handles the file upload, processing, and saving
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func ProcessAndSaveImage(c fiber.Ctx, fieldName string, opts ImageOptions) (string, error) {
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configs.Logger.Info(
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"ProcessAndSaveImage called",
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zap.String("field", fieldName),
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zap.Int("width", opts.Width),
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zap.Int("height", opts.Height),
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zap.Int("quality", opts.Quality),
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zap.String("format", opts.Format),
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)
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file, err := c.FormFile(fieldName)
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if err != nil {
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configs.Logger.Warn("no file uploaded for field", zap.Error(err), zap.String("field", fieldName))
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return "", nil
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}
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f, err := file.Open()
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if err != nil {
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configs.Logger.Error("failed to open uploaded file", zap.Error(err), zap.String("filename", file.Filename))
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return "", err
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}
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defer f.Close()
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buffer, err := io.ReadAll(f)
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if err != nil {
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configs.Logger.Error("failed to read uploaded file bytes", zap.Error(err), zap.String("filename", file.Filename))
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return "", err
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}
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configs.Logger.Debug("read uploaded file bytes", zap.String("filename", file.Filename), zap.Int("bytes", len(buffer)))
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remoteURL, err := callImageAPI(buffer, file.Filename, opts)
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if err != nil {
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configs.Logger.Error("image API call failed", zap.Error(err))
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return "", fmt.Errorf("resim işleme hatası: %v", err)
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}
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configs.Logger.Info("image saved", zap.String("url", remoteURL), zap.Int("width", opts.Width), zap.Int("height", opts.Height), zap.String("format", opts.Format), zap.Int("quality", opts.Quality))
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return remoteURL, nil
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}
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// ProcessAndSaveImageFromBytes processes raw image bytes and saves the file
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func ProcessAndSaveImageFromBytes(buffer []byte, opts ImageOptions) (string, error) {
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configs.Logger.Debug("ProcessAndSaveImageFromBytes called", zap.Int("input_bytes", len(buffer)), zap.Any("options", opts))
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remoteURL, err := callImageAPI(buffer, "image.jpg", opts)
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if err != nil {
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configs.Logger.Error("image API call failed (from bytes)", zap.Error(err))
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return "", fmt.Errorf("resim işleme hatası: %v", err)
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}
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configs.Logger.Info("image saved from bytes", zap.String("url", remoteURL), zap.Int("width", opts.Width), zap.Int("height", opts.Height), zap.String("format", opts.Format), zap.Int("quality", opts.Quality))
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return remoteURL, nil
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}
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