// Build download request for file with its corresponding metadata
private DownloadFileWithMetaDataRequest buildDownloadFileRequest(FileMetaData metadata)
{
if (metadata == null ||
metadata.id == null)
{
throw new KinveyException(EnumErrorCategory.ERROR_FILE, EnumErrorCode.ERROR_FILE_DOWNLOAD_MISSING_METADATA_INFORMATION, "");
}
var urlParameters = new Dictionary <string, string>();
urlParameters.Add("appKey", ((KinveyClientRequestInitializer)client.RequestInitializer).AppKey);
urlParameters.Add("fileID", metadata.id);
DownloadFileWithMetaDataRequest downloadRequest = new DownloadFileWithMetaDataRequest(urlParameters, this.client);
client.InitializeRequest(downloadRequest);
//download.clientAppVersion = this.GetClientAppVersion ();
downloadRequest.customRequestHeaders = this.GetCustomRequestProperties();
//TODO need more elegant approach for mime type
// RestSharp.HttpHeader mime = new RestSharp.HttpHeader ();
// mime.Name = "x-kinvey-content-type";
// mime.Value = "application/octet-stream";
// download.RequestHeaders.Add (mime);
return(downloadRequest);
}
/// <summary>
/// Download the File associated with the id of the provided metadata. The file is streamed into the stream, with delegates returning either errors or the FileMetaData from Kinvey.
/// </summary>
/// <param name="metadata">The FileMetaData representing the file to download. This must contain an id.</param>
/// <param name="content">Where the contents of the file will be streamed.</param>
/// <param name="ct">[optional] The cancellation token. If cancellation is requested, an OperationCancelledException will be thrown.</param>
public async Task <FileMetaData> DownloadAsync(FileMetaData metadata, Stream content, CancellationToken ct = default(CancellationToken))
{
DownloadFileWithMetaDataRequest downloadRequest = buildDownloadFileRequest(metadata);
ct.ThrowIfCancellationRequested();
FileMetaData fmd = await downloadRequest.ExecuteAsync();
ct.ThrowIfCancellationRequested();
await downloadRequest.downloadFileAsync(fmd, content);
return(fmd);
}
/// <summary>
/// Download the File associated with the id of the provided metadata. The file is copied into the byte[], with delegates returning either errors or the FileMetaData from Kinvey.
/// </summary>
/// <param name="metadata">The FileMetaData representing the file to download. This must contain an id.</param>
/// <param name="content">Content.</param>
/// <param name="ct">[optional] The cancellation token. If cancellation is requested, an OperationCancelledException will be thrown.</param>
public async Task <FileMetaData> DownloadAsync(FileMetaData metadata, byte[] content, CancellationToken ct = default(CancellationToken))
{
DownloadFileWithMetaDataRequest downloadRequest = buildDownloadFileRequest(metadata);
ct.ThrowIfCancellationRequested();
FileMetaData fmd = await downloadRequest.ExecuteAsync().ConfigureAwait(false);
ct.ThrowIfCancellationRequested();
content = await downloadRequest.downloadFileBytesAsync(fmd).ConfigureAwait(false);
return(fmd);
}
