Listing Object Versions (SDK for Java)

import com.obs.services.ObsClient;
import com.obs.services.exception.ObsException;
import com.obs.services.model.ListVersionsResult;
import com.obs.services.model.VersionOrDeleteMarker;
public class ListVersions001 {
    public static void main(String[] args) {
        // Obtain an AK/SK pair using environment variables or import the AK/SK pair in other ways. Using hard coding may result in leakage.
        // Obtain an AK/SK pair on the management console.
        String ak = System.getenv("ACCESS_KEY_ID");
        String sk = System.getenv("SECRET_ACCESS_KEY_ID");
        // (Optional) If you are using a temporary AK/SK pair and a security token to access OBS, you are advised not to use hard coding, which may result in information leakage.
        // Obtain an AK/SK pair and a security token using environment variables or import them in other ways.
        // String securityToken = System.getenv("SECURITY_TOKEN");
        // Enter the endpoint corresponding to the bucket. EU-Dublin is used here as an example. Replace it with the one in your actual situation.
        String endPoint = "https://obs.eu-west-101.myhuaweicloud.eu"; 
        // Obtain an endpoint using environment variables or import it in other ways.
        //String endPoint = System.getenv("ENDPOINT");
        
        // Create an ObsClient instance.
        // Use the permanent AK/SK pair to initialize the client.
        ObsClient obsClient = new ObsClient(ak, sk,endPoint);
        // Use the temporary AK/SK pair and security token to initialize the client.
        // ObsClient obsClient = new ObsClient(ak, sk, securityToken, endPoint);

        try {
            // Listing object versions.
            ListVersionsResult result = obsClient.listVersions("examplebucket");
            System.out.println("listVersions successfully");
            for (VersionOrDeleteMarker v : result.getVersions()) {
                System.out.println("Key:" + v.getKey());
                System.out.println("Owner:" + v.getOwner());
                System.out.println("isDeleteMarker:" + v.isDeleteMarker());
            }
        } catch (ObsException e) {
            System.out.println("listVersions failed");
            // Request failed. Print the HTTP status code.
            System.out.println("HTTP Code:" + e.getResponseCode());
            // Request failed. Print the server-side error code.
            System.out.println("Error Code:" + e.getErrorCode());
            // Request failed. Print the error details.
            System.out.println("Error Message:" + e.getErrorMessage());
            // Request failed. Print the request ID.
            System.out.println("Request ID:" + e.getErrorRequestId());
            System.out.println("Host ID:" + e.getErrorHostId());
            e.printStackTrace();
        } catch (Exception e) {
            System.out.println("listVersions failed");
            // Print other error information.
            e.printStackTrace();
        }
    }
}

import com.obs.services.ObsClient;
import com.obs.services.exception.ObsException;
import com.obs.services.model.ListVersionsResult;
import com.obs.services.model.VersionOrDeleteMarker;
public class ListVersions002 {
    public static void main(String[] args) {
        // Obtain an AK/SK pair using environment variables or import the AK/SK pair in other ways. Using hard coding may result in leakage.
        // Obtain an AK/SK pair on the management console.
        String ak = System.getenv("ACCESS_KEY_ID");
        String sk = System.getenv("SECRET_ACCESS_KEY_ID");
        // (Optional) If you are using a temporary AK/SK pair and a security token to access OBS, you are advised not to use hard coding, which may result in information leakage.
        // Obtain an AK/SK pair and a security token using environment variables or import them in other ways.
        // String securityToken = System.getenv("SECURITY_TOKEN");
        // Enter the endpoint corresponding to the bucket. EU-Dublin is used here as an example. Replace it with the one in your actual situation.
        String endPoint = "https://obs.eu-west-101.myhuaweicloud.eu"; 
        // Obtain an endpoint using environment variables or import it in other ways.
        //String endPoint = System.getenv("ENDPOINT");
        
        // Create an ObsClient instance.
        // Use the permanent AK/SK pair to initialize the client.
        ObsClient obsClient = new ObsClient(ak, sk,endPoint);
        // Use the temporary AK/SK pair and security token to initialize the client.
        // ObsClient obsClient = new ObsClient(ak, sk, securityToken, endPoint);

        try {
            // List a specified number of object versions.
            ListVersionsResult result = obsClient.listVersions("examplebucket", 100);
            System.out.println("listVersions successfully");
            for (VersionOrDeleteMarker v : result.getVersions()) {
                System.out.println("Key:" + v.getKey());
                System.out.println("Owner:" + v.getOwner());
                System.out.println("isDeleteMarker:" + v.isDeleteMarker());
            }
        } catch (ObsException e) {
            System.out.println("listVersions failed");
            // Request failed. Print the HTTP status code.
            System.out.println("HTTP Code:" + e.getResponseCode());
            // Request failed. Print the server-side error code.
            System.out.println("Error Code:" + e.getErrorCode());
            // Request failed. Print the error details.
            System.out.println("Error Message:" + e.getErrorMessage());
            // Request failed. Print the request ID.
            System.out.println("Request ID:" + e.getErrorRequestId());
            System.out.println("Host ID:" + e.getErrorHostId());
            e.printStackTrace();
        } catch (Exception e) {
            System.out.println("listVersions failed");
            // Print other error information.
            e.printStackTrace();
        }
    }
}

import com.obs.services.ObsClient;
import com.obs.services.exception.ObsException;
import com.obs.services.model.ListVersionsRequest;
import com.obs.services.model.ListVersionsResult;
import com.obs.services.model.VersionOrDeleteMarker;
public class ListVersions003 {
    public static void main(String[] args) {
        // Obtain an AK/SK pair using environment variables or import the AK/SK pair in other ways. Using hard coding may result in leakage.
        // Obtain an AK/SK pair on the management console.
        String ak = System.getenv("ACCESS_KEY_ID");
        String sk = System.getenv("SECRET_ACCESS_KEY_ID");
        // (Optional) If you are using a temporary AK/SK pair and a security token to access OBS, you are advised not to use hard coding, which may result in information leakage.
        // Obtain an AK/SK pair and a security token using environment variables or import them in other ways.
        // String securityToken = System.getenv("SECURITY_TOKEN");
        // Enter the endpoint corresponding to the bucket. EU-Dublin is used here as an example. Replace it with the one in your actual situation.
        String endPoint = "https://obs.eu-west-101.myhuaweicloud.eu"; 
        // Obtain an endpoint using environment variables or import it in other ways.
        //String endPoint = System.getenv("ENDPOINT");
        
        // Create an ObsClient instance.
        // Use the permanent AK/SK pair to initialize the client.
        ObsClient obsClient = new ObsClient(ak, sk,endPoint);
        // Use the temporary AK/SK pair and security token to initialize the client.
        // ObsClient obsClient = new ObsClient(ak, sk, securityToken, endPoint);

        try {
            // List object versions by specifying a prefix.
            // List 100 object versions with the specified prefix.
            ListVersionsRequest request = new ListVersionsRequest("examplebucket", 100);
            request.setPrefix("prefix");
            ListVersionsResult result = obsClient.listVersions(request);
            System.out.println("listVersions successfully");
            for (VersionOrDeleteMarker v : result.getVersions()) {
                System.out.println("Key:" + v.getKey());
                System.out.println("Owner:" + v.getOwner());
                System.out.println("isDeleteMarker:" + v.isDeleteMarker());
            }
        } catch (ObsException e) {
            System.out.println("listVersions failed");
            // Request failed. Print the HTTP status code.
            System.out.println("HTTP Code:" + e.getResponseCode());
            // Request failed. Print the server-side error code.
            System.out.println("Error Code:" + e.getErrorCode());
            // Request failed. Print the error details.
            System.out.println("Error Message:" + e.getErrorMessage());
            // Request failed. Print the request ID.
            System.out.println("Request ID:" + e.getErrorRequestId());
            System.out.println("Host ID:" + e.getErrorHostId());
            e.printStackTrace();
        } catch (Exception e) {
            System.out.println("listVersions failed");
            // Print other error information.
            e.printStackTrace();
        }
    }
}

import com.obs.services.ObsClient;
import com.obs.services.exception.ObsException;
import com.obs.services.model.ListVersionsRequest;
import com.obs.services.model.ListVersionsResult;
import com.obs.services.model.VersionOrDeleteMarker;
public class ListVersions004 {
    public static void main(String[] args) {
        // Obtain an AK/SK pair using environment variables or import the AK/SK pair in other ways. Using hard coding may result in leakage.
        // Obtain an AK/SK pair on the management console.
        String ak = System.getenv("ACCESS_KEY_ID");
        String sk = System.getenv("SECRET_ACCESS_KEY_ID");
        // (Optional) If you are using a temporary AK/SK pair and a security token to access OBS, you are advised not to use hard coding, which may result in information leakage.
        // Obtain an AK/SK pair and a security token using environment variables or import them in other ways.
        // String securityToken = System.getenv("SECURITY_TOKEN");
        // Enter the endpoint corresponding to the bucket. EU-Dublin is used here as an example. Replace it with the one in your actual situation.
        String endPoint = "https://obs.eu-west-101.myhuaweicloud.eu"; 
        // Obtain an endpoint using environment variables or import it in other ways.
        //String endPoint = System.getenv("ENDPOINT");
        
        // Create an ObsClient instance.
        // Use the permanent AK/SK pair to initialize the client.
        ObsClient obsClient = new ObsClient(ak, sk,endPoint);
        // Use the temporary AK/SK pair and security token to initialize the client.
        // ObsClient obsClient = new ObsClient(ak, sk, securityToken, endPoint);

        try {
            // List objects from a specified start position.
            // List 100 object versions whose names following test in lexicographic order.
            ListVersionsRequest request = new ListVersionsRequest("examplebucket", 100);
            request.setKeyMarker("test");
            ListVersionsResult result = obsClient.listVersions(request);
            System.out.println("listVersions successfully");
            for (VersionOrDeleteMarker v : result.getVersions()) {
                System.out.println("Key:" + v.getKey());
                System.out.println("Owner:" + v.getOwner());
                System.out.println("isDeleteMarker:" + v.isDeleteMarker());
            }
        } catch (ObsException e) {
            System.out.println("listVersions failed");
            // Request failed. Print the HTTP status code.
            System.out.println("HTTP Code:" + e.getResponseCode());
            // Request failed. Print the server-side error code.
            System.out.println("Error Code:" + e.getErrorCode());
            // Request failed. Print the error details.
            System.out.println("Error Message:" + e.getErrorMessage());
            // Request failed. Print the request ID.
            System.out.println("Request ID:" + e.getErrorRequestId());
            System.out.println("Host ID:" + e.getErrorHostId());
            e.printStackTrace();
        } catch (Exception e) {
            System.out.println("listVersions failed");
            // Print other error information.
            e.printStackTrace();
        }
    }
}

import com.obs.services.ObsClient;
import com.obs.services.exception.ObsException;
import com.obs.services.model.ListVersionsRequest;
import com.obs.services.model.ListVersionsResult;
import com.obs.services.model.VersionOrDeleteMarker;
public class ListVersions005 {
    public static void main(String[] args) {
        // Obtain an AK/SK pair using environment variables or import the AK/SK pair in other ways. Using hard coding may result in leakage.
        // Obtain an AK/SK pair on the management console.
        String ak = System.getenv("ACCESS_KEY_ID");
        String sk = System.getenv("SECRET_ACCESS_KEY_ID");
        // (Optional) If you are using a temporary AK/SK pair and a security token to access OBS, you are advised not to use hard coding, which may result in information leakage.
        // Obtain an AK/SK pair and a security token using environment variables or import them in other ways.
        // String securityToken = System.getenv("SECURITY_TOKEN");
        // Enter the endpoint corresponding to the bucket. EU-Dublin is used here as an example. Replace it with the one in your actual situation.
        String endPoint = "https://obs.eu-west-101.myhuaweicloud.eu"; 
        // Obtain an endpoint using environment variables or import it in other ways.
        //String endPoint = System.getenv("ENDPOINT");
        
        // Create an ObsClient instance.
        // Use the permanent AK/SK pair to initialize the client.
        ObsClient obsClient = new ObsClient(ak, sk,endPoint);
        // Use the temporary AK/SK pair and security token to initialize the client.
        // ObsClient obsClient = new ObsClient(ak, sk, securityToken, endPoint);

        try {
            // List all object versions using pagination.
            ListVersionsResult result;
            ListVersionsRequest request = new ListVersionsRequest("examplebucket", 100);
            do {
                result = obsClient.listVersions(request);
                System.out.println("listVersions successfully");
                for (VersionOrDeleteMarker v : result.getVersions()) {
                    System.out.println("Key:" + v.getKey());
                    System.out.println("Owner:" + v.getOwner());
                    System.out.println("isDeleteMarker:" + v.isDeleteMarker());
                }
                request.setKeyMarker(result.getNextKeyMarker());
                request.setVersionIdMarker(result.getNextVersionIdMarker());
            } while (result.isTruncated());
        } catch (ObsException e) {
            System.out.println("listVersions failed");
            // Request failed. Print the HTTP status code.
            System.out.println("HTTP Code:" + e.getResponseCode());
            // Request failed. Print the server-side error code.
            System.out.println("Error Code:" + e.getErrorCode());
            // Request failed. Print the error details.
            System.out.println("Error Message:" + e.getErrorMessage());
            // Request failed. Print the request ID.
            System.out.println("Request ID:" + e.getErrorRequestId());
            System.out.println("Host ID:" + e.getErrorHostId());
            e.printStackTrace();
        } catch (Exception e) {
            System.out.println("listVersions failed");
            // Print other error information.
            e.printStackTrace();
        }
    }
}

import com.obs.services.ObsClient;
import com.obs.services.exception.ObsException;
import com.obs.services.model.ListVersionsRequest;
import com.obs.services.model.ListVersionsResult;
import com.obs.services.model.VersionOrDeleteMarker;
public class ListVersions006 {
    public static void main(String[] args) {
        // Obtain an AK/SK pair using environment variables or import the AK/SK pair in other ways. Using hard coding may result in leakage.
        // Obtain an AK/SK pair on the management console.
        String ak = System.getenv("ACCESS_KEY_ID");
        String sk = System.getenv("SECRET_ACCESS_KEY_ID");
        // (Optional) If you are using a temporary AK/SK pair and a security token to access OBS, you are advised not to use hard coding, which may result in information leakage.
        // Obtain an AK/SK pair and a security token using environment variables or import them in other ways.
        // String securityToken = System.getenv("SECURITY_TOKEN");
        // Enter the endpoint corresponding to the bucket. EU-Dublin is used here as an example. Replace it with the one in your actual situation.
        String endPoint = "https://obs.eu-west-101.myhuaweicloud.eu"; 
        // Obtain an endpoint using environment variables or import it in other ways.
        //String endPoint = System.getenv("ENDPOINT");
        
        // Create an ObsClient instance.
        // Use the permanent AK/SK pair to initialize the client.
        ObsClient obsClient = new ObsClient(ak, sk,endPoint);
        // Use the temporary AK/SK pair and security token to initialize the client.
        // ObsClient obsClient = new ObsClient(ak, sk, securityToken, endPoint);

        try {
            //List all object versions in a folder.
            ListVersionsResult result;
            ListVersionsRequest request = new ListVersionsRequest("examplebucket", 100);
            // Set folder name dir/ as the prefix.
            request.setPrefix("dir/");
            do {
                result = obsClient.listVersions(request);
                System.out.println("listVersions successfully");
                for (VersionOrDeleteMarker v : result.getVersions()) {
                    System.out.println("Key:" + v.getKey());
                    System.out.println("Owner:" + v.getOwner());
                    System.out.println("isDeleteMarker:" + v.isDeleteMarker());
                }
                request.setKeyMarker(result.getNextKeyMarker());
                request.setVersionIdMarker(result.getNextVersionIdMarker());
            } while (result.isTruncated());
        } catch (ObsException e) {
            System.out.println("listVersions failed");
            // Request failed. Print the HTTP status code.
            System.out.println("HTTP Code:" + e.getResponseCode());
            // Request failed. Print the server-side error code.
            System.out.println("Error Code:" + e.getErrorCode());
            // Request failed. Print the error details.
            System.out.println("Error Message:" + e.getErrorMessage());
            // Request failed. Print the request ID.
            System.out.println("Request ID:" + e.getErrorRequestId());
            System.out.println("Host ID:" + e.getErrorHostId());
            e.printStackTrace();
        } catch (Exception e) {
            System.out.println("listVersions failed");
            // Print other error information.
            e.printStackTrace();
        }
    }
}

import com.obs.services.ObsClient;
import com.obs.services.exception.ObsException;
import com.obs.services.model.ListVersionsRequest;
import com.obs.services.model.ListVersionsResult;
import com.obs.services.model.VersionOrDeleteMarker;
public class ListVersions007 {
    public static void main(String[] args) {
        // Obtain an AK/SK pair using environment variables or import the AK/SK pair in other ways. Using hard coding may result in leakage.
        // Obtain an AK/SK pair on the management console.
        String ak = System.getenv("ACCESS_KEY_ID");
        String sk = System.getenv("SECRET_ACCESS_KEY_ID");
        // (Optional) If you are using a temporary AK/SK pair and a security token to access OBS, you are advised not to use hard coding, which may result in information leakage.
        // Obtain an AK/SK pair and a security token using environment variables or import them in other ways.
        // String securityToken = System.getenv("SECURITY_TOKEN");
        // Enter the endpoint corresponding to the bucket. EU-Dublin is used here as an example. Replace it with the one in your actual situation.
        String endPoint = "https://obs.eu-west-101.myhuaweicloud.eu"; 
        // Obtain an endpoint using environment variables or import it in other ways.
        //String endPoint = System.getenv("ENDPOINT");
        
        // Create an ObsClient instance.
        // Use the permanent AK/SK pair to initialize the client.
        ObsClient obsClient = new ObsClient(ak, sk,endPoint);
        // Use the temporary AK/SK pair and security token to initialize the client.
        // ObsClient obsClient = new ObsClient(ak, sk, securityToken, endPoint);

        try {
            // List all object versions in the root directory.
            ListVersionsRequest request = new ListVersionsRequest("examplebucket", 1000);
            request.setDelimiter("/");
            ListVersionsResult result = obsClient.listVersions(request);
            System.out.println("listVersions successfully");
            System.out.println("Objects in the root directory:");
            for (VersionOrDeleteMarker v : result.getVersions()) {
                System.out.println("Key:" + v.getKey());
                System.out.println("Owner:" + v.getOwner());
                System.out.println("isDeleteMarker:" + v.isDeleteMarker());
            }
            listVersionsByPrefix(obsClient, result);
        } catch (ObsException e) {
            System.out.println("listVersions failed");
            // Request failed. Print the HTTP status code.
            System.out.println("HTTP Code:" + e.getResponseCode());
            // Request failed. Print the server-side error code.
            System.out.println("Error Code:" + e.getErrorCode());
            // Request failed. Print the error details.
            System.out.println("Error Message:" + e.getErrorMessage());
            // Request failed. Print the request ID.
            System.out.println("Request ID:" + e.getErrorRequestId());
            System.out.println("Host ID:" + e.getErrorHostId());
            e.printStackTrace();
        } catch (Exception e) {
            System.out.println("listVersions failed");
            // Print other error information.
            e.printStackTrace();
        }
    }

    // Recursively list object versions in a sub-folder.
    static void listVersionsByPrefix(ObsClient obsClient, ListVersionsResult result) throws ObsException {
        for (String prefix : result.getCommonPrefixes()) {
            System.out.println("Objects in folder [" + prefix + "]:");
            ListVersionsRequest request = new ListVersionsRequest("examplebucket", 1000);
            request.setDelimiter("/");
            request.setPrefix(prefix);
            result = obsClient.listVersions(request);
            for (VersionOrDeleteMarker v : result.getVersions()) {
                System.out.println("Key:" + v.getKey());
                System.out.println("Owner:" + v.getOwner());
                System.out.println("isDeleteMarker:" + v.isDeleteMarker());
            }
            listVersionsByPrefix(obsClient, result);
        }
    }
}