(Xojo Plugin) 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.

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

Dim rest As New Chilkat.Rest

// Connect to the Amazon AWS REST server in the desired region.
Dim bTls As Boolean
bTls = True
Dim port As Int32
port = 443
Dim bAutoReconnect As Boolean
bAutoReconnect = True
Dim success As Boolean
success = rest.Connect("glacier.us-west-2.amazonaws.com",port,bTls,bAutoReconnect)

// Provide AWS credentials.
Dim authAws As New Chilkat.AuthAws
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 <> True) Then
    System.DebugLog(rest.LastErrorText)
    Return
End If

// Read the response header.
Dim responseStatusCode As Int32
responseStatusCode = rest.ReadResponseHeader()
If (responseStatusCode < 0) Then
    System.DebugLog(rest.LastErrorText)
    Return
End If

System.DebugLog("Response status code = " + Str(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 Chilkat.Stream

    // 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
        System.DebugLog(rest.LastErrorText)
        Return
    End If

    System.DebugLog("Successfully received the archive file.")

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

End If