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S3 Get Bucket Policy

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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.

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Local $bSuccess = 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.

$oRest = ObjCreate("Chilkat.Rest")

; Connect to the Amazon AWS REST server in the desired region.
Local $bTls = True
Local $iPort = 443
Local $bAutoReconnect = True
$bSuccess = $oRest.Connect("s3-us-west-2.amazonaws.com",$iPort,$bTls,$bAutoReconnect)

; Provide AWS credentials.
$oAuthAws = ObjCreate("Chilkat.AuthAws")
$oAuthAws.AccessKey = "AWS_ACCESS_KEY"
$oAuthAws.SecretKey = "AWS_SECRET_KEY"
$oAuthAws.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".
$oAuthAws.Region = "us-west-2"

$bSuccess = $oRest.SetAuthAws($oAuthAws)

; 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"
$oRest.Host = "chilkat.ocean.s3.amazonaws.com"

; Get the policy.
Local $sResponseJsonStr = $oRest.FullRequestNoBody("GET","/?policy")
If ($oRest.LastMethodSuccess <> True) Then
    ConsoleWrite($oRest.LastErrorText & @CRLF)
    Exit
EndIf

; When successful, the S3 Storage service will respond with a 200 response code,
; with an XML body.  
If ($oRest.ResponseStatusCode <> 200) Then
    ; Examine the request/response to see what happened.
    ConsoleWrite("response status code = " & $oRest.ResponseStatusCode & @CRLF)
    ConsoleWrite("response status text = " & $oRest.ResponseStatusText & @CRLF)
    ConsoleWrite("response header: " & $oRest.ResponseHeader & @CRLF)
    ConsoleWrite("response body: " & $sResponseJsonStr & @CRLF)
    ConsoleWrite("---" & @CRLF)
    ConsoleWrite("LastRequestStartLine: " & $oRest.LastRequestStartLine & @CRLF)
    ConsoleWrite("LastRequestHeader: " & $oRest.LastRequestHeader & @CRLF)
EndIf

ConsoleWrite("response body: " & $sResponseJsonStr & @CRLF)

; Load the JSON and display in a more human-readable manner:
$oJson = ObjCreate("Chilkat.JsonObject")
$oJson.Load($sResponseJsonStr)
$oJson.EmitCompact = False
ConsoleWrite($oJson.Emit() & @CRLF)

; Sample output:

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