|
|
(JavaScript) 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.
var success = false;
// 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.
var rest = new CkRest();
// Connect to the Amazon AWS REST server in the desired region.
var bTls = true;
var port = 443;
var bAutoReconnect = true;
success = rest.Connect("s3-us-west-2.amazonaws.com",port,bTls,bAutoReconnect);
// Provide AWS credentials.
var authAws = new CkAuthAws();
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.
var responseJsonStr = rest.FullRequestNoBody("GET","/?policy");
if (rest.LastMethodSuccess !== true) {
console.log(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.
console.log("response status code = " + rest.ResponseStatusCode);
console.log("response status text = " + rest.ResponseStatusText);
console.log("response header: " + rest.ResponseHeader);
console.log("response body: " + responseJsonStr);
console.log("---");
console.log("LastRequestStartLine: " + rest.LastRequestStartLine);
console.log("LastRequestHeader: " + rest.LastRequestHeader);
}
console.log("response body: " + responseJsonStr);
// Load the JSON and display in a more human-readable manner:
var json = new CkJsonObject();
json.Load(responseJsonStr);
json.EmitCompact = false;
console.log(json.Emit());
// Sample output:
// {
// "Version": "2012-10-17",
// "Statement": [
// {
// "Effect": "Allow",
// "Resource": "arn:aws:s3.asp">chilkat.ocean/",
// "Principal": "*"
// }
// ]
// }
//
|
