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C# UWP/WinRT Examples

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(C# UWP/WinRT) S3 Get Bucket Policy

Demonstrates how to send a GET request to fetch the policy of a specified bucket. The following information is quoted from the AWS REST API reference documentation at http://docs.aws.amazon.com/AmazonS3/latest/API/RESTBucketGETpolicy.html

To use this operation, you must have GetPolicy permissions on the specified bucket, and you must be the bucket owner.

If you don't have GetPolicy permissions, Amazon S3 returns a 403 Access Denied error. If you have the correct permissions, but you're not the bucket owner, Amazon S3 returns a 405 Method Not Allowed error. If the bucket does not have a policy, Amazon S3 returns a 404 Policy Not found error. There are restrictions about who can create bucket policies and which objects in a bucket they can apply to. For more information, go to Using Bucket Policies.

Important: This example requires Chilkat v9.5.0.66 or greater.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// Important: This example requires Chilkat v9.5.0.66 or greater.

Chilkat.Rest rest = new Chilkat.Rest();

// Connect to the Amazon AWS REST server in the desired region.
bool bTls = true;
int port = 443;
bool bAutoReconnect = true;
bool success = await rest.ConnectAsync("s3-us-west-2.amazonaws.com",port,bTls,bAutoReconnect);

// Provide AWS credentials.
Chilkat.AuthAws authAws = new Chilkat.AuthAws();
authAws.AccessKey = "AWS_ACCESS_KEY";
authAws.SecretKey = "AWS_SECRET_KEY";
authAws.ServiceName = "s3";

// This particular bucket is in the Oregon region, as opposed to the US Standard,
// therefore the Region must be set appropriately.
// Also note that we connected to "s3-us-west-2.amazonaws.com".
authAws.Region = "us-west-2";

success = rest.SetAuthAws(authAws);

// Note: The above REST connection and setup of the AWS credentials
// can be done once.  After connecting, any number of REST calls can be made.
// The "auto reconnect" property passed to rest.Connect indicates that if
// the connection is lost, a REST method call will automatically reconnect
// if needed.
// --------------------------------------------------------------------------

// Set the bucket name via the HOST header.
// In this case, the bucket name is "chilkat.ocean".
// Note that the Host header should use "bucketName.s3.amazonaws.com", not "bucketName.s3-us-west-2.amazonaws.com"
rest.Host = "chilkat.ocean.s3.amazonaws.com";

// Get the policy.
string responseJsonStr = await rest.FullRequestNoBodyAsync("GET","/?policy");
if (rest.LastMethodSuccess != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

// When successful, the S3 Storage service will respond with a 200 response code,
// with an XML body.  
if (rest.ResponseStatusCode != 200) {
    // Examine the request/response to see what happened.
    Debug.WriteLine("response status code = " + Convert.ToString(rest.ResponseStatusCode));
    Debug.WriteLine("response status text = " + rest.ResponseStatusText);
    Debug.WriteLine("response header: " + rest.ResponseHeader);
    Debug.WriteLine("response body: " + responseJsonStr);
    Debug.WriteLine("---");
    Debug.WriteLine("LastRequestStartLine: " + rest.LastRequestStartLine);
    Debug.WriteLine("LastRequestHeader: " + rest.LastRequestHeader);
}

Debug.WriteLine("response body: " + responseJsonStr);

// Load the JSON and display in a more human-readable manner:
Chilkat.JsonObject json = new Chilkat.JsonObject();
json.Load(responseJsonStr);
json.EmitCompact = false;
Debug.WriteLine(json.Emit());

// Sample output:

// 	{ 
// 	  "Version": "2012-10-17",
// 	  "Statement": [
// 	    { 
// 	      "Effect": "Allow",
// 	      "Resource": "arn:aws:s3.asp">chilkat.ocean/",
// 	      "Principal": "*"
// 	    }
// 	  ]
// 	}
// 

 

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