(Visual FoxPro) 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.

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

LOCAL loRest
LOCAL lnBTls
LOCAL lnPort
LOCAL lnBAutoReconnect
LOCAL lnSuccess
LOCAL loAuthAws
LOCAL loBd
LOCAL loCrypt
LOCAL lcTreeHashHex
LOCAL lcLinearHashHex
LOCAL loSbResponseBody
LOCAL lnRespStatusCode
LOCAL lcArchiveId
LOCAL lcLocation

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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Rest')
loRest = CreateObject('Chilkat.Rest')

* Connect to the Amazon AWS REST server in the desired region.
lnBTls = 1
lnPort = 443
lnBAutoReconnect = 1
lnSuccess = loRest.Connect("glacier.us-west-2.amazonaws.com",lnPort,lnBTls,lnBAutoReconnect)

* Provide AWS credentials.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.AuthAws')
loAuthAws = CreateObject('Chilkat.AuthAws')
loAuthAws.AccessKey = "AWS_ACCESS_KEY"
loAuthAws.SecretKey = "AWS_SECRET_KEY"
loAuthAws.ServiceName = "glacier"
loAuthAws.Region = "us-west-2"

lnSuccess = 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.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.BinData')
loBd = CreateObject('Chilkat.BinData')
lnSuccess = 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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Crypt2')
loCrypt = CreateObject('Chilkat.Crypt2')
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")

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSbResponseBody = CreateObject('Chilkat.StringBuilder')
lnSuccess = loRest.FullRequestBd("POST","/AWS_ACCOUNT_ID/vaults/chilkat/archives",loBd,loSbResponseBody)
IF (lnSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    RELEASE loAuthAws
    RELEASE loBd
    RELEASE loCrypt
    RELEASE loSbResponseBody
    CANCEL
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
    CANCEL
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