Performing a Streaming Download

Sample code:

// Initialize configuration parameters.
ObsConfig config = new ObsConfig();
config.Endpoint = "https://your-endpoint";
// Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables AccessKeyID and SecretAccessKey.
// Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/eu/usermanual-ca/ca_01_0003.html.
string accessKey= Environment.GetEnvironmentVariable("AccessKeyID", EnvironmentVariableTarget.Machine);
string secretKey= Environment.GetEnvironmentVariable("SecretAccessKey", EnvironmentVariableTarget.Machine);
// Create an instance of ObsClient.
ObsClient client = new ObsClient(accessKey, secretKey, config);
// Download an object.
try
{
    GetObjectRequest request = new GetObjectRequest()
    {
        BucketName = "bucketname",
        ObjectKey = "objectname",
    };
    using (GetObjectResponse response = client.GetObject(request))
    {
        string dest = "savepath";
        if (!File.Exists(dest))
        {
           // Write the data streams into the file.
            response.WriteResponseStreamToFile(dest);
        }
        Console.WriteLine("Get object response: {0}", response.StatusCode);
    }
}
catch (ObsException ex)
{
   Console.WriteLine("ErrorCode: {0}", ex.ErrorCode);
   Console.WriteLine("ErrorMessage: {0}", ex.ErrorMessage);
}

GetObjectResponse.OutputStream (System.IO.Stream type) is the response stream in GetObjectResponse. You can obtain the object content to a local file or memory via GetObjectResponse.OutputStream. Alternatively, you can call GetObjectResponse.WriteResponseStreamToFile provided by OBS .NET SDK to download the object content to a local file.

Object response streams obtained by GetObjectResponse.OutputStream must be closed explicitly using a GetObjectResponse.OutputStream.Close() call. Otherwise, resource leakage may occur.