B4X

Amazon Glacier Get Vault Access Policy

See more Amazon Glacier Examples

Demonstrates how to retrieve the access-policy subresource set on the vault B4X

Dim success As Boolean = False

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

Dim rest As ChilkatRest
rest.Initialize("rest")

'  Connect to the Amazon AWS REST server in the desired region.
Dim bTls As Boolean = True
Dim port As Int = 443
Dim bAutoReconnect As Boolean = True
success = rest.Connect("glacier.us-west-2.amazonaws.com", port, bTls, bAutoReconnect)

'  Provide AWS credentials.
Dim authAws As ChilkatAuthAws
authAws.Initialize
authAws.AccessKey = "AWS_ACCESS_KEY"
authAws.SecretKey = "AWS_SECRET_KEY"
authAws.ServiceName = "glacier"
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.
'  --------------------------------------------------------------------------

'  For more information, see Glacier Get Vault Access Policy Reference Documentation
'  
rest.AddHeader("x-amz-glacier-version", "2012-06-01")

'  Get the access policy for the "chilkat" vault.
Dim sbResponseBody As ChilkatStringBuilder
sbResponseBody.Initialize
success = rest.FullRequestNoBodySb("GET", "/AWS_ACCOUNT_ID/vaults/chilkat/access-policy", sbResponseBody)
If success <> True Then
    Log(rest.LastErrorText)
    Return
End If


Dim respStatusCode As Int = rest.ResponseStatusCode
If respStatusCode >= 400 Then
    Log("Response Status Code = " & respStatusCode)
    Log("Response Header:")
    Log(rest.ResponseHeader)
    Log("Response Body:")
    Log(sbResponseBody.GetAsString)
    Return
End If


'  Success is indicated by a 200 response status.
Log("response status code = " & respStatusCode)

Dim json As ChilkatJsonObject
json.Initialize
json.LoadSb(sbResponseBody)
json.EmitCompact = False

'  Returns JSON such as this:
'  {
'    "Policy": "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Sid\":\"Define-owner-access-rights\",\"Effect\":\"Allow\",\"Principal\":{\"AWS\":\"arn:aws:iam::9999999999999:root\"},\"Action\":\"glacier:DeleteArchive\",\"Resource\":\"arn:aws:glacier:us-west-2:9999999999999:vaults/chilkat\"}]}"
'  }

'  Unwrap...
Dim jsonPolicy As ChilkatJsonObject
jsonPolicy.Initialize
jsonPolicy.Load(json.StringOf("Policy"))
jsonPolicy.EmitCompact = False

Log(jsonPolicy.Emit)
Log("----")

'  The jsonPolicy contains:

'  {
'    "Version": "2012-10-17",
'    "Statement": [
'      {
'        "Sid": "Define-owner-access-rights",
'        "Effect": "Allow",
'        "Principal": {
'          "AWS": "arn:aws:iam::9999999999999:root"
'        },
'        "Action": "glacier:DeleteArchive",
'        "Resource": "arn:aws:glacier:us-west-2:9999999999999:vaults/chilkat"
'      }
'    ]
'  }
'  

'  Use this online tool to generate parsing code from sample JSON: 
'  Generate Parsing Code from JSON

'  To parse the above contents of jsonPolicy...
Dim Version As String
Dim i As Int
Dim count_i As Int
Dim Sid As String
Dim Effect As String
Dim PrincipalAWS As String
Dim Action As String
Dim Resource As String

Version = jsonPolicy.StringOf("Version")
i = 0
count_i = jsonPolicy.SizeOfArray("Statement")
Do While i < count_i
    jsonPolicy.I = i
    Sid = jsonPolicy.StringOf("Statement[i].Sid")
    Effect = jsonPolicy.StringOf("Statement[i].Effect")
    PrincipalAWS = jsonPolicy.StringOf("Statement[i].Principal.AWS")
    Action = jsonPolicy.StringOf("Statement[i].Action")
    Resource = jsonPolicy.StringOf("Statement[i].Resource")
    i = i + 1
Loop