Get Metadata of files placed on B2

Question

In Java can we get file creation date of file placed in B2 bucket. Like we can get modified date on the local directory. I am using rclone to upload files in B2 Buckets.

FYI: I have to do this because I do not know how to mount B2 bucket to local machine as a directory. I some one knows any open source tool to mount b2 to local machine it will great help.

Thanks in advance!

Answer 1

import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;

class B2FileInfo {

    public void main(String[] args) throws Exception{
    String apiUrl = ""; // Provided by b2_authorize_account
    String fileId = ""; // The ID of the file you want to get info on
    String accountAuthorizationToken = ""; // Provided by b2_authorize_account
    HttpURLConnection connection = null;
    String postParams = "{\"fileId\":\"" + fileId + "\"}";
    byte postData[] = postParams.getBytes(StandardCharsets.UTF_8);
    try
    {
        URL url = new URL(apiUrl + "/b2api/v1/b2_get_file_info");
        connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Authorization", accountAuthorizationToken);
        connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        connection.setRequestProperty("charset", "utf-8");
        connection.setRequestProperty("Content-Length", Integer.toString(postData.length));
        connection.setDoOutput(true);
        DataOutputStream writer = new DataOutputStream(connection.getOutputStream());
        writer.write(postData);
        String jsonResponse = myInputStreamReader(connection.getInputStream());
        System.out.println(jsonResponse);
    }catch(Exception e)
    {
        e.printStackTrace();
    }finally
    {
        connection.disconnect();
    }
    }

static public String myInputStreamReader(InputStream in) throws IOException {
    InputStreamReader reader = new InputStreamReader(in);
    StringBuilder sb = new StringBuilder();
    int c = reader.read();
    while (c != -1) {
        sb.append((char)c);
        c = reader.read();
    }
    reader.close();
    return sb.toString();
}
}