(Visual Basic 6.0) Glacier Download Archive

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.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

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

Dim rest As New ChilkatRest

' Connect to the Amazon AWS REST server in the desired region.
Dim bTls As Long
bTls = 1
Dim port As Long
port = 443
Dim bAutoReconnect As Long
bAutoReconnect = 1
Dim success As Long
success = rest.Connect("glacier.us-west-2.amazonaws.com",port,bTls,bAutoReconnect)

' Provide AWS credentials.
Dim authAws As New ChilkatAuthAws
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
' 
success = 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 <> 1) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

' Read the response header.
Dim responseStatusCode As Long
responseStatusCode = rest.ReadResponseHeader()
If (responseStatusCode < 0) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

Debug.Print "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 New ChilkatStream

    ' 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,1)
    If (success <> 1) Then
        Debug.Print rest.LastErrorText
        Exit Sub
    End If

    Debug.Print "Successfully received the archive file."

Else
    Dim jsonError As String
    jsonError = rest.ReadRespBodyString()
    If (rest.LastMethodSuccess <> 1) Then
        Debug.Print rest.LastErrorText
    Else
        Debug.Print jsonError
    End If

End If