Upload and Retrieve the Temporary File - Flutter

This guide demonstrates how to upload and retrieve files from VideoSDK's temporary file storage system.

note

Both methods need a joined room. They return a Future that throws a VideoSDKError when the call fails, so await them inside try/catch. An empty argument throws 3073 (ERROR_INVALID_PARAMETER).

uploadBase64File()

• By using the uploadBase64File() method of the Room class, you can upload your file to Videosdk's Temporary storage.

• The uploadBase64File() method only works with base64. Therefore, it is necessary to convert your file into base64 format.

• You have to pass base64Data,token,fileName as parameter in uploadBase64File() function.

• The function will return the corresponding fileUrl, which you can then use to retrieve the file.

• If the upload fails, it throws a VideoSDKError with code 3074 (ERROR_FILE_UPLOAD_FAILED).

Future<void> uploadFile() async {
  String base64Data = "<Your File's base64>"; //Convert your file to base64 and pass here
  String token = "<VIDEOSDK_TOKEN>";
  String fileName = "myImage.jpeg"; // Provide name with extension here
  try {
    String? url = await room.uploadBase64File(
      base64Data: base64Data,
      token: token,
      fileName: fileName,
    );
    print("fileUrl $url");
  } on VideoSDKError catch (e) {
    print("Upload failed: ${e.code} ${e.name}");
  }
}

fetchBase64File()

• By using the fetchBase64File() method of the Room class, you can retrieve your file from Videosdk's Temporary storage.

• You have to pass the fileUrl which is returned by uploadBase64File() function, and the token as parameters to retrieve a file.

• This function will return the image in the form of base64.

• If the fetch fails, it throws a VideoSDKError with code 3075 (ERROR_FILE_FETCH_FAILED).

Future<void> fetchFile() async {
  String url = "<Your FileUrl>"; //Provide fileUrl which is returned by uploadBase64File()
  String token = "<VIDEOSDK_TOKEN>";
  try {
    String? base64 = await room.fetchBase64File(
      url: url,
      token: token,
    );
    print("base64 $base64");
  } on VideoSDKError catch (e) {
    print("Fetch failed: ${e.code} ${e.name}");
  }
}

note

The file stored in the system will be automatically deleted once the current room comes to an end.

API Reference

• uploadBase64File()
• fetchBase64File()