(Lianja) Amazon Glacier Upload Archive from In-Memory Data

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

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.

loRest = createobject("CkRest")

// Connect to the Amazon AWS REST server in the desired region.
llBTls = .T.
lnPort = 443
llBAutoReconnect = .T.
llSuccess = loRest.Connect("glacier.us-west-2.amazonaws.com",lnPort,llBTls,llBAutoReconnect)

// Provide AWS credentials.
loAuthAws = createobject("CkAuthAws")
loAuthAws.AccessKey = "AWS_ACCESS_KEY"
loAuthAws.SecretKey = "AWS_SECRET_KEY"
loAuthAws.ServiceName = "glacier"
loAuthAws.Region = "us-west-2"

llSuccess = loRest.SetAuthAws(loAuthAws)

// --------------------------------------------------------------------------
// 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.
loBd = createobject("CkBinData")
llSuccess = loBd.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
// 
loRest.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

loCrypt = createobject("CkCrypt2")
loCrypt.HashAlgorithm = "sha256-tree-hash"
loCrypt.EncodingMode = "hexlower"
lcTreeHashHex = loCrypt.HashBdENC(loBd)
loRest.AddHeader("x-amz-sha256-tree-hash",lcTreeHashHex)

loCrypt.HashAlgorithm = "sha256"
lcLinearHashHex = loCrypt.HashBdENC(loBd)
loAuthAws.PrecomputedSha256 = lcLinearHashHex

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

loSbResponseBody = createobject("CkStringBuilder")
llSuccess = loRest.FullRequestBd("POST","/AWS_ACCOUNT_ID/vaults/chilkat/archives",loBd,loSbResponseBody)
if (llSuccess <> .T.) then
    ? loRest.LastErrorText
    release loRest
    release loAuthAws
    release loBd
    release loCrypt
    release loSbResponseBody
    return
endif

lnRespStatusCode = loRest.ResponseStatusCode
if (lnRespStatusCode >= 400) then
    ? "Response Status Code = " + str(lnRespStatusCode)
    ? "Response Header:"
    ? loRest.ResponseHeader
    ? "Response Body:"
    ? loSbResponseBody.GetAsString()
    release loRest
    release loAuthAws
    release loBd
    release loCrypt
    release loSbResponseBody
    return
endif

// Success is indicated by a 201 response status with an empty response body.
? "response status code = " + str(lnRespStatusCode)

// 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
// 

lcArchiveId = loRest.ResponseHdrByName("x-amz-archive-id")
? "x-amz-archive-id = " + lcArchiveId

lcLocation = loRest.ResponseHdrByName("Location")
? "Location = " + lcLocation


release loRest
release loAuthAws
release loBd
release loCrypt
release loSbResponseBody