Xbase++

S3 Upload String using AWS Signature Version 2

See more Amazon S3 (new) Examples

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

LOCAL nSuccess
LOCAL oRest
LOCAL nBTls
LOCAL nPort
LOCAL nBAutoReconnect
LOCAL oAuthAws
LOCAL oFac
LOCAL cFileContents
LOCAL cResponseBodyStr
LOCAL nStatusCode

nSuccess := 0

//  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.

oRest := CreateObject("Chilkat.Rest")

//  Connect to the Amazon AWS REST server.
nBTls := 1
nPort := 443
nBAutoReconnect := 1
//  The file is uploaded to the bucket named "chilkat100", which becomes part of the domain:
nSuccess := oRest:Connect("chilkat100.s3.amazonaws.com", nPort, nBTls, nBAutoReconnect)

//  ----------------------------------------------------------------------------
//  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.
oAuthAws := CreateObject("Chilkat.AuthAws")
oAuthAws:AccessKey := "AWS_ACCESS_KEY"
oAuthAws:SecretKey := "AWS_SECRET_KEY"
oAuthAws:ServiceName := "s3"

//  For AWS Signature Version 2, the following two properties need to be set:
oAuthAws: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.
oAuthAws:CanonicalizedResourceV2 := "/chilkat100/hamlet_play.xml"

nSuccess := oRest:SetAuthAws(oAuthAws)

//  Load a text file into memory.
oFac := CreateObject("Chilkat.FileAccess")
cFileContents := oFac:ReadEntireTextFile("qa_data/xml/hamlet.xml", "utf-8")
IF (oFac:LastMethodSuccess != 1)
    ? oFac:LastErrorText
    oRest:destroy()
    oAuthAws:destroy()
    oFac:destroy()
    RETURN
ENDIF

//  To send the file in gzip or deflate compressed format, set the Content-Encoding request
//  header to "gzip" or "deflate".  (this is optional)
nSuccess := oRest:AddHeader("Content-Encoding", "gzip")

//  Indicate the Content-Type of our upload.  (This is optional)
nSuccess := oRest: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)
nSuccess := oRest:AddHeader("Expect", "100-continue")

//  Upload the file to Amazon S3.
cResponseBodyStr := oRest:FullRequestString("PUT", "/hamlet_play.xml", cFileContents)
IF (oRest:LastMethodSuccess != 1)
    ? oRest:LastErrorText
    oRest:destroy()
    oAuthAws:destroy()
    oFac:destroy()
    RETURN
ENDIF

//  Did we get a 200 response indicating success?
nStatusCode := oRest:ResponseStatusCode
IF (nStatusCode != 200)
    ? "Error response: " + cResponseBodyStr
    ? "Status code: " + Str(nStatusCode) + ", Status text: " + oRest:ResponseStatusText
    oRest:destroy()
    oAuthAws:destroy()
    oFac:destroy()
    RETURN
ENDIF

? "File successfully uploaded."

oRest:destroy()
oAuthAws:destroy()
oFac:destroy()