internal async Task DownloadPackageAsync(JObject updatePackage, string expectedBundleFileName, Progress <HttpProgress> downloadProgress)
{
// Using its hash, get the folder where the new update will be saved
StorageFolder codePushFolder = await GetCodePushFolderAsync().ConfigureAwait(false);
var newUpdateHash = (string)updatePackage[CodePushConstants.PackageHashKey];
StorageFolder newUpdateFolder = await GetPackageFolderAsync(newUpdateHash, false).ConfigureAwait(false);
if (newUpdateFolder != null)
{
// This removes any stale data in newUpdateFolder that could have been left
// uncleared due to a crash or error during the download or install process.
await newUpdateFolder.DeleteAsync().AsTask().ConfigureAwait(false);
}
newUpdateFolder = await GetPackageFolderAsync(newUpdateHash, true).ConfigureAwait(false);
StorageFile newUpdateMetadataFile = await newUpdateFolder.CreateFileAsync(CodePushConstants.PackageFileName).AsTask().ConfigureAwait(false);
var downloadUrlString = (string)updatePackage[CodePushConstants.DownloadUrlKey];
StorageFile downloadFile = await GetDownloadFileAsync().ConfigureAwait(false);
var downloadUri = new Uri(downloadUrlString);
// Download the file and send progress event asynchronously
var request = new HttpRequestMessage(HttpMethod.Get, downloadUri);
var client = new HttpClient();
var cancellationTokenSource = new CancellationTokenSource();
using (HttpResponseMessage response = await client.SendRequestAsync(request).AsTask(cancellationTokenSource.Token, downloadProgress).ConfigureAwait(false))
using (IInputStream inputStream = await response.Content.ReadAsInputStreamAsync().AsTask().ConfigureAwait(false))
using (IRandomAccessStream downloadFileStream = await downloadFile.OpenAsync(FileAccessMode.ReadWrite).AsTask().ConfigureAwait(false))
{
await RandomAccessStream.CopyAsync(inputStream, downloadFileStream).AsTask().ConfigureAwait(false);
}
try
{
// Unzip the downloaded file and then delete the zip
StorageFolder unzippedFolder = await CreateUnzippedFolderAsync().ConfigureAwait(false);
ZipFile.ExtractToDirectory(downloadFile.Path, unzippedFolder.Path);
await downloadFile.DeleteAsync().AsTask().ConfigureAwait(false);
// Merge contents with current update based on the manifest
StorageFile diffManifestFile = (StorageFile)await unzippedFolder.TryGetItemAsync(CodePushConstants.DiffManifestFileName).AsTask().ConfigureAwait(false);
if (diffManifestFile != null)
{
StorageFolder currentPackageFolder = await GetCurrentPackageFolderAsync().ConfigureAwait(false);
if (currentPackageFolder == null)
{
throw new InvalidDataException("Received a diff update, but there is no current version to diff against.");
}
await UpdateUtils.CopyNecessaryFilesFromCurrentPackageAsync(diffManifestFile, currentPackageFolder, newUpdateFolder).ConfigureAwait(false);
await diffManifestFile.DeleteAsync().AsTask().ConfigureAwait(false);
}
await FileUtils.MergeFoldersAsync(unzippedFolder, newUpdateFolder).ConfigureAwait(false);
await unzippedFolder.DeleteAsync().AsTask().ConfigureAwait(false);
// For zip updates, we need to find the relative path to the jsBundle and save it in the
// metadata so that we can find and run it easily the next time.
string relativeBundlePath = await UpdateUtils.FindJSBundleInUpdateContentsAsync(newUpdateFolder, expectedBundleFileName).ConfigureAwait(false);
if (relativeBundlePath == null)
{
throw new InvalidDataException("Update is invalid - A JS bundle file named \"" + expectedBundleFileName + "\" could not be found within the downloaded contents. Please check that you are releasing your CodePush updates using the exact same JS bundle file name that was shipped with your app's binary.");
}
else
{
if (diffManifestFile != null)
{
// TODO verify hash for diff update
// CodePushUpdateUtils.verifyHashForDiffUpdate(newUpdateFolderPath, newUpdateHash);
}
updatePackage[CodePushConstants.RelativeBundlePathKey] = relativeBundlePath;
}
}
catch (InvalidDataException)
{
// Downloaded file is not a zip, assume it is a jsbundle
await downloadFile.RenameAsync(expectedBundleFileName).AsTask().ConfigureAwait(false);
await downloadFile.MoveAsync(newUpdateFolder).AsTask().ConfigureAwait(false);
}
/*TODO: ZipFile.ExtractToDirectory is not reliable and throws exceptions if:
* - path is too long
* it needs to be handled
*/
// Save metadata to the folder
await FileIO.WriteTextAsync(newUpdateMetadataFile, JsonConvert.SerializeObject(updatePackage)).AsTask().ConfigureAwait(false);
}
