B4X

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.

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.
'  --------------------------------------------------------------------------

'  Load the data to be uploaded.
Dim bd As ChilkatBinData
bd.Initialize
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 ChilkatCrypt2
crypt.Initialize("crypt")
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 ChilkatStringBuilder
sbResponseBody.Initialize
success = rest.FullRequestBd("POST", "/AWS_ACCOUNT_ID/vaults/chilkat/archives", bd, 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 201 response status with an empty response body.
Log("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")
Log("x-amz-archive-id = " & archiveId)

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