(Visual FoxPro) S3 Upload String using AWS Signature Version 2

Example to upload the contents of a string to the Amazon S3 service, using the older AWS Signature Version 2.

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

LOCAL loRest
LOCAL lnBTls
LOCAL lnPort
LOCAL lnBAutoReconnect
LOCAL lnSuccess
LOCAL loAuthAws
LOCAL loFac
LOCAL lcFileContents
LOCAL lcResponseBodyStr
LOCAL lnStatusCode

* Demonstrates how to use older AWS S3 Signature Version 2 for uploading the contents
* of a string variable to an object in a bucket.

* 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.
lnBTls = 1
lnPort = 443
lnBAutoReconnect = 1
* The file is uploaded to the bucket named "chilkat100", which becomes part of the domain:
lnSuccess = loRest.Connect("chilkat100.s3.amazonaws.com",lnPort,lnBTls,lnBAutoReconnect)

* ----------------------------------------------------------------------------
* Important: For buckets created in regions outside us-east-1,
* there are three important changes that need to be made.
* See Working with S3 Buckets in Non-us-east-1 Regions for the details.
* ----------------------------------------------------------------------------

* Provide AWS credentials for the REST call.
* 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 = "s3"

* For AWS Signature Version 2, the following two properties need to be set:
loAuthAws.SignatureVersion = 2
* See http://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html#ConstructingTheCanonicalizedResourceElement
* The bucket is "chilkat100", and the uriPath is "/hamlet_play.xml", which must match
* the URI path passed to the FullRequestString method below.
loAuthAws.CanonicalizedResourceV2 = "/chilkat100/hamlet_play.xml"

lnSuccess = loRest.SetAuthAws(loAuthAws)

* Load a text file into memory.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.FileAccess')
loFac = CreateObject('Chilkat.FileAccess')
lcFileContents = loFac.ReadEntireTextFile("qa_data/xml/hamlet.xml","utf-8")
IF (loFac.LastMethodSuccess <> 1) THEN
    ? loFac.LastErrorText
    RELEASE loRest
    RELEASE loAuthAws
    RELEASE loFac
    CANCEL
ENDIF

* To send the file in gzip or deflate compressed format, set the Content-Encoding request
* header to "gzip" or "deflate".  (this is optional)
lnSuccess = loRest.AddHeader("Content-Encoding","gzip")

* Indicate the Content-Type of our upload.  (This is optional)
lnSuccess = loRest.AddHeader("Content-Type","text/xml")

* We can add an "Expect: 100-continue" header so that if the request is rejected
* by the server immediately after receiving the request header, it can respond
* and the client (Chilkat) can avoid sending the file data.
* (this is optional)
lnSuccess = loRest.AddHeader("Expect","100-continue")

* Upload the file to Amazon S3.
lcResponseBodyStr = loRest.FullRequestString("PUT","/hamlet_play.xml",lcFileContents)
IF (loRest.LastMethodSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    RELEASE loAuthAws
    RELEASE loFac
    CANCEL
ENDIF

* Did we get a 200 response indicating success?
lnStatusCode = loRest.ResponseStatusCode
IF (lnStatusCode <> 200) THEN
    ? "Error response: " + lcResponseBodyStr
    ? "Status code: " + STR(lnStatusCode) + ", Status text: " + loRest.ResponseStatusText
    RELEASE loRest
    RELEASE loAuthAws
    RELEASE loFac
    CANCEL
ENDIF

? "File successfully uploaded."

RELEASE loRest
RELEASE loAuthAws
RELEASE loFac