[client] Feature/upload bundle (#3734)

Add an upload bundle option with the flag --upload-bundle; by default, the upload will use a NetBird address, which can be replaced using the flag --upload-bundle-url.

The upload server is available under the /upload-server path. The release change will push a docker image to netbirdio/upload image repository.

The server supports using s3 with pre-signed URL for direct upload and local file for storing bundles.

client/server/debug_test.go

@@ -0,0 +1,49 @@
+package server
+
+import (
+	"context"
+	"errors"
+	"net/http"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/netbirdio/netbird/upload-server/server"
+	"github.com/netbirdio/netbird/upload-server/types"
+)
+
+func TestUpload(t *testing.T) {
+	if os.Getenv("DOCKER_CI") == "true" {
+		t.Skip("Skipping upload test on docker ci")
+	}
+	testDir := t.TempDir()
+	testURL := "http://localhost:8080"
+	t.Setenv("SERVER_URL", testURL)
+	t.Setenv("STORE_DIR", testDir)
+	srv := server.NewServer()
+	go func() {
+		if err := srv.Start(); err != nil && !errors.Is(err, http.ErrServerClosed) {
+			t.Errorf("Failed to start server: %v", err)
+		}
+	}()
+	t.Cleanup(func() {
+		if err := srv.Stop(); err != nil {
+			t.Errorf("Failed to stop server: %v", err)
+		}
+	})
+
+	file := filepath.Join(t.TempDir(), "tmpfile")
+	fileContent := []byte("test file content")
+	err := os.WriteFile(file, fileContent, 0640)
+	require.NoError(t, err)
+	key, err := uploadDebugBundle(context.Background(), testURL+types.GetURLPath, testURL, file)
+	require.NoError(t, err)
+	id := getURLHash(testURL)
+	require.Contains(t, key, id+"/")
+	expectedFilePath := filepath.Join(testDir, key)
+	createdFileContent, err := os.ReadFile(expectedFilePath)
+	require.NoError(t, err)
+	require.Equal(t, fileContent, createdFileContent)
+}