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Glacier Download Archive

See more Amazon Glacier Examples

Demonstrates how to download an Amazon Glacier archive. Downloading a Glacier archive is a two step process. First an archive retrieval job is initiated. After it completes, the job output is downloaded (i.e. the archive contents are downloaded.)

Note: This example requires Chilkat v9.5.0.78 or greater.

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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 Retrieve Job Output Reference Documentation
'  
rest.AddHeader("x-amz-glacier-version", "2012-06-01")

'  To download an archive, we'll make several method calls:
'  1) Send the HTTPS GET request.
'  2) Get the response body.
'  3) If the response status code indicates success, stream the response body (i.e the archive data) to a file.
'  4) If the response status code indicates an error, get the JSON error response.

'  Send the GET request.
success = rest.SendReqNoBody("GET", "/AWS_ACCOUNT_ID/vaults/chilkat/jobs/JOB_ID/output")
If success <> True Then
    Log(rest.LastErrorText)
    Return
End If


'  Read the response header.
Dim responseStatusCode As Int = rest.ReadResponseHeader
If responseStatusCode < 0 Then
    Log(rest.LastErrorText)
    Return
End If


Log("Response status code = " & responseStatusCode)

'  We expect a 200 response status if the archive data is coming.
'  Otherwise, we'll get a JSON response body with an error message(or no response body).
If responseStatusCode = 200 Then

    Dim bodyStream As ChilkatStream
    bodyStream.Initialize("bodyStream")

    '  The stream's sink will be a file.
    bodyStream.SinkFile = "qa_output/archiveData.dat"

    '  Read the response body to the stream.
    success = rest.ReadRespBodyStream(bodyStream, True)
    If success <> True Then
        Log(rest.LastErrorText)
        Return
    End If


    Log("Successfully received the archive file.")

Else
    Dim jsonError As String = rest.ReadRespBodyString
    If rest.LastMethodSuccess <> True Then
        Log(rest.LastErrorText)
    Else
        Log(jsonError)
    End If

End If