VB.NET

Amazon Glacier Upload Archive from In-Memory Data

See more Amazon Glacier Examples

Demonstrates how to add an archive to a vault from data in memory.

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

VB.NET

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 New Chilkat.Rest

' Connect to the Amazon AWS REST server in the desired region.
Dim bTls As Boolean = True
Dim port As Integer = 443
Dim bAutoReconnect As Boolean = True
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.
' --------------------------------------------------------------------------

' Load the data to be uploaded.
Dim bd As New Chilkat.BinData
success = bd.LoadFile("qa_data/jpg/penguins.jpg")
' (The point here is that the contents of the bd don't necessarily have to come from a file.)

' 
' For more information, see Glacier Upload Archive Reference Documentation
' 
rest.AddHeader("x-amz-glacier-version","2012-06-01")

' We'll need to pre-compute the SHA256 tree hash and the SHA256 linear hash.
' The hashes are added in the following request headers:

' x-amz-sha256-tree-hash: SHA256 tree hash
' x-amz-content-sha256: SHA256 linear hash

Dim crypt As New Chilkat.Crypt2
crypt.HashAlgorithm = "sha256-tree-hash"
crypt.EncodingMode = "hexlower"
Dim treeHashHex As String = crypt.HashBdENC(bd)
rest.AddHeader("x-amz-sha256-tree-hash",treeHashHex)

crypt.HashAlgorithm = "sha256"
Dim linearHashHex As String = crypt.HashBdENC(bd)
authAws.PrecomputedSha256 = linearHashHex

' We can optionally add a description
rest.AddHeader("x-amz-archive-description","Penguins JPG")

Dim sbResponseBody As New Chilkat.StringBuilder
success = rest.FullRequestBd("POST","/AWS_ACCOUNT_ID/vaults/chilkat/archives",bd,sbResponseBody)
If (success <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


Dim respStatusCode As Integer = rest.ResponseStatusCode
If (respStatusCode >= 400) Then
    Debug.WriteLine("Response Status Code = " & respStatusCode)
    Debug.WriteLine("Response Header:")
    Debug.WriteLine(rest.ResponseHeader)
    Debug.WriteLine("Response Body:")
    Debug.WriteLine(sbResponseBody.GetAsString())
    Exit Sub
End If


' Success is indicated by a 201 response status with an empty response body.
Debug.WriteLine("response status code = " & respStatusCode)

' If successful, the response header looks like this.
' The Location and x-amz-archive-id are two items of information we may wish to save..

' HTTP/1.1 201 Created
' x-amzn-RequestId: AAABZpJrTyioDC_HsOmHae8EZp_uBSJr6cnGOLKp_XJCl-Q
' Date: Wed, 10 Feb 2017 12:00:00 GMT
' x-amz-sha256-tree-hash: beb0fe31a1c7ca8c6c04d574ea906e3f97b31fdca7571defb5b44dca89b5af60
' Location: /111122223333/vaults/examplevault/archives/NkbByEejwEggmBz2fTH ... GlqrEXAMPLEArchiveId
' x-amz-archive-id: NkbByEejwEggmBz2fTHgJrg0XBoDfjP4q6iu87-TjhqG6eGoOY9Z8i1_AUyUsu ... BfGlqrEXAMPLEArchiveId
' 

Dim archiveId As String = rest.ResponseHdrByName("x-amz-archive-id")
Debug.WriteLine("x-amz-archive-id = " & archiveId)

Dim location As String = rest.ResponseHdrByName("Location")
Debug.WriteLine("Location = " & location)