fix update

internal/controllers/facr_controller.go

@@ -33,6 +33,70 @@ var (
 	cacheTTL    = 30 * time.Minute
 )
 
+// facrRetryConfig defines retry behavior for FACR API calls
+var facrRetryConfig = struct {
+	MaxAttempts int
+	BaseDelay   time.Duration
+	MaxDelay    time.Duration
+}{
+	MaxAttempts: 10,
+	BaseDelay:   5 * time.Second,
+	MaxDelay:    60 * time.Second,
+}
+
+// fetchWithRetry performs HTTP GET with retry logic and exponential backoff
+func fetchWithRetry(url string, timeout time.Duration) (*http.Response, error) {
+	var lastErr error
+	client := &http.Client{Timeout: timeout}
+
+	for attempt := 1; attempt <= facrRetryConfig.MaxAttempts; attempt++ {
+		resp, err := client.Get(url)
+		if err != nil {
+			lastErr = err
+			if attempt < facrRetryConfig.MaxAttempts {
+				multiplier := 1 << uint(attempt-1) // 2^(attempt-1)
+				delay := facrRetryConfig.BaseDelay * time.Duration(multiplier)
+				if delay > facrRetryConfig.MaxDelay {
+					delay = facrRetryConfig.MaxDelay
+				}
+				time.Sleep(delay)
+			}
+			continue
+		}
+
+		// Check if response indicates an error from the FACR API
+		if resp.StatusCode != http.StatusOK {
+			body, _ := io.ReadAll(io.LimitReader(resp.Body, 2048))
+			resp.Body.Close()
+
+			// Check if body contains scraping error (temporary failure)
+			bodyStr := string(body)
+			if strings.Contains(bodyStr, "scraping failed") ||
+				strings.Contains(bodyStr, "Cloudflare") ||
+				strings.Contains(bodyStr, "failed to fetch") ||
+				resp.StatusCode >= 500 {
+				lastErr = fmt.Errorf("FACR API temporary error (attempt %d): %s", attempt, bodyStr)
+				if attempt < facrRetryConfig.MaxAttempts {
+					multiplier := 1 << uint(attempt-1) // 2^(attempt-1)
+					delay := facrRetryConfig.BaseDelay * time.Duration(multiplier)
+					if delay > facrRetryConfig.MaxDelay {
+						delay = facrRetryConfig.MaxDelay
+					}
+					time.Sleep(delay)
+				}
+				continue
+			}
+
+			// For other errors, return immediately with a reconstructed response
+			return resp, nil
+		}
+
+		return resp, nil
+	}
+
+	return nil, fmt.Errorf("FACR API failed after %d attempts: %v", facrRetryConfig.MaxAttempts, lastErr)
+}
+
 func cacheDir() string {
 	return filepath.Join("cache", "facr")
 }
@@ -229,8 +293,7 @@ func (fc *FACRController) SearchClubs(c *gin.Context) {
 	vals.Set("q", q)
 	searchURL := "https://facr.tdvorak.dev/club/search?" + vals.Encode()
 
-	httpClient := &http.Client{Timeout: 60 * time.Second}
-	resp, err := httpClient.Get(searchURL)
+	resp, err := fetchWithRetry(searchURL, 10*time.Minute)
 	if err != nil {
 		c.JSON(http.StatusBadGateway, gin.H{"error": fmt.Sprintf("Error fetching from FACR API: %v", err)})
 		return
@@ -371,8 +434,7 @@ func (fc *FACRController) GetClubInfo(c *gin.Context) {
 		return
 	}
 	external := fmt.Sprintf("https://facr.tdvorak.dev/club/%s/%s", clubType, clubID)
-	httpClient := &http.Client{Timeout: 60 * time.Second}
-	resp, err := httpClient.Get(external)
+	resp, err := fetchWithRetry(external, 10*time.Minute)
 	if err != nil {
 		c.JSON(http.StatusBadGateway, gin.H{"error": fmt.Sprintf("proxy error: %v", err)})
 		return
@@ -639,8 +701,7 @@ func (fc *FACRController) GetClubTables(c *gin.Context) {
 		return
 	}
 	external := fmt.Sprintf("https://facr.tdvorak.dev/club/%s/%s/table", clubType, clubID)
-	httpClient := &http.Client{Timeout: 60 * time.Second}
-	resp, err := httpClient.Get(external)
+	resp, err := fetchWithRetry(external, 10*time.Minute)
 	if err != nil {
 		c.JSON(http.StatusBadGateway, gin.H{"error": fmt.Sprintf("proxy error: %v", err)})
 		return