feat(surfshark): update API endpoint and servers data (#1560)

internal/provider/surfshark/updater/api.go

@@ -10,7 +10,6 @@ import (
 	"github.com/qdm12/gluetun/internal/provider/surfshark/servers"
 )
 
-// Note: no multi-hop and some OpenVPN servers are missing from their API.
 func addServersFromAPI(ctx context.Context, client *http.Client,
 	hts hostToServers) (err error) {
 	data, err := fetchAPI(ctx, client)
@@ -52,31 +51,38 @@ type serverData struct {
 
 func fetchAPI(ctx context.Context, client *http.Client) (
 	servers []serverData, err error) {
-	const url = "https://my.surfshark.com/vpn/api/v4/server/clusters"
+	const url = "https://api.surfshark.com/v4/server/clusters"
 
-	request, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
-	if err != nil {
-		return nil, err
-	}
+	for _, clustersType := range [...]string{"generic", "double", "static", "obfuscated"} {
+		request, err := http.NewRequestWithContext(ctx, http.MethodGet, url+"/"+clustersType, nil)
+		if err != nil {
+			return nil, err
+		}
 
-	response, err := client.Do(request)
-	if err != nil {
-		return nil, err
-	}
-	defer response.Body.Close()
+		response, err := client.Do(request)
+		if err != nil {
+			return nil, err
+		}
+		defer response.Body.Close()
 
-	if response.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("%w: %d %s", ErrHTTPStatusCodeNotOK,
-			response.StatusCode, response.Status)
-	}
+		if response.StatusCode != http.StatusOK {
+			return nil, fmt.Errorf("%w: %d %s", ErrHTTPStatusCodeNotOK,
+				response.StatusCode, response.Status)
+		}
 
-	decoder := json.NewDecoder(response.Body)
-	if err := decoder.Decode(&servers); err != nil {
-		return nil, fmt.Errorf("decoding response body: %w", err)
-	}
+		decoder := json.NewDecoder(response.Body)
+		var newServers []serverData
+		err = decoder.Decode(&newServers)
+		if err != nil {
+			return nil, fmt.Errorf("decoding response body: %w", err)
+		}
 
-	if err := response.Body.Close(); err != nil {
-		return nil, err
+		err = response.Body.Close()
+		if err != nil {
+			return nil, err
+		}
+
+		servers = append(servers, newServers...)
 	}
 
 	return servers, nil