# downloadStringFile method

String downloadStringFile(

1. String? url

)

Downloads a file from the specified URL and returns a string.

param url The URL to the file. return The file as a string. throws BiosealException An error has occurred during Bioseal Library execution.

## Implementation

    String downloadStringFile(String? url) {
      Pointer<Char>? pUrl = url?.toNativeUtf8().cast<Char>();
      Pointer<Char> pData = nullptr;
      Pointer<Int> pDataSize = calloc.allocate(1);
      pDataSize[0] = -1;
      try {
        var err = biosealSDK.id3BiosealResourceCallbackArgs_DownloadStringFile(_pHandle.value, pUrl ?? nullptr, pData, pDataSize);
        if (err == BiosealError.insufficientBuffer.value) {
          pData = calloc.allocate(pDataSize.value);
          err = biosealSDK.id3BiosealResourceCallbackArgs_DownloadStringFile(_pHandle.value, pUrl ?? nullptr, pData, pDataSize);
          if (err != BiosealError.success.value) {
            throw BiosealException(err);
          }
        }
        final vData = utf8.decode(Uint8List.fromList(pData.cast<Uint8>().asTypedList(pDataSize.value)));
        return vData;
      } finally {
        if (pUrl != null) {
          calloc.free(pUrl);
        }
        calloc.free(pData);
        calloc.free(pDataSize);
      }
    }