[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.

upload-server/server/local_test.go

@@ -0,0 +1,65 @@
+package server
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/netbirdio/netbird/upload-server/types"
+)
+
+func Test_LocalHandlerGetUploadURL(t *testing.T) {
+	mockURL := "http://localhost:8080"
+	t.Setenv("SERVER_URL", mockURL)
+	t.Setenv("STORE_DIR", t.TempDir())
+
+	mux := http.NewServeMux()
+	err := configureLocalHandlers(mux)
+	require.NoError(t, err)
+
+	req := httptest.NewRequest(http.MethodGet, types.GetURLPath+"?id=test-file", nil)
+	req.Header.Set(types.ClientHeader, types.ClientHeaderValue)
+
+	rec := httptest.NewRecorder()
+	mux.ServeHTTP(rec, req)
+
+	require.Equal(t, http.StatusOK, rec.Code)
+
+	var response types.GetURLResponse
+	err = json.Unmarshal(rec.Body.Bytes(), &response)
+	require.NoError(t, err)
+	require.Contains(t, response.URL, "test-file/")
+	require.NotEmpty(t, response.Key)
+	require.Contains(t, response.Key, "test-file/")
+
+}
+
+func Test_LocalHandlePutRequest(t *testing.T) {
+	mockDir := t.TempDir()
+	mockURL := "http://localhost:8080"
+	t.Setenv("SERVER_URL", mockURL)
+	t.Setenv("STORE_DIR", mockDir)
+
+	mux := http.NewServeMux()
+	err := configureLocalHandlers(mux)
+	require.NoError(t, err)
+
+	fileContent := []byte("test file content")
+	req := httptest.NewRequest(http.MethodPut, putURLPath+"/uploads/test.txt", bytes.NewReader(fileContent))
+
+	rec := httptest.NewRecorder()
+	mux.ServeHTTP(rec, req)
+
+	require.Equal(t, http.StatusOK, rec.Code)
+
+	expectedFilePath := filepath.Join(mockDir, "uploads", "test.txt")
+	createdFileContent, err := os.ReadFile(expectedFilePath)
+	require.NoError(t, err)
+	require.Equal(t, fileContent, createdFileContent)
+}