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S3 Complete a Multipart Upload

See more Amazon S3 (new) Examples

This operation completes a multipart upload by assembling previously uploaded parts.

Processing of a Complete Multipart Upload request could take several minutes to complete. After Amazon S3 begins processing the request, it sends an HTTP response header that specifies a 200 OK response. While processing is in progress, Amazon S3 periodically sends whitespace characters to keep the connection from timing out. Because a request could fail after the initial 200 OK response has been sent, it is important that you check the response body to determine whether the request succeeded.

This example sends a POST request to complete a multipart upload, which looks like this:

POST /ObjectName?uploadId=UploadId HTTP/1.1
Host: BucketName.s3.amazonaws.com
Date: Date
Content-Length: Size
Authorization: authorization string

<CompleteMultipartUpload>
  <Part>
    <PartNumber>PartNumber</PartNumber>
    <ETag>ETag</ETag>
  </Part>
  ...
</CompleteMultipartUpload>

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Local $bSuccess = False

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

; The 1st step in an S3 multipart upload is to initiate it,
; as shown here: Initiate S3 Multipart Upload

; The 2nd step is to upload the parts
; as shown here: S3 Upload Parts

; The 3rd and final step (this example) is to complete the multipart upload.

; Other S3 Multipart Upload Examples:
; Abort Multipart Upload
; List Parts

; When the multipart upload was initiated, an UploadId was provided in the XML response, and it 
; was saved to a file.  Steps 2 and 3 begin by loading the XML and getting
; the Upload ID.

$oXmlInit = ObjCreate("Chilkat.Xml")
$bSuccess = $oXmlInit.LoadXmlFile("s3_multipart_uploads/initiate.xml")
If ($bSuccess <> True) Then
    ConsoleWrite("Did not find the initiate.xml XML file." & @CRLF)
    Exit
EndIf

Local $sUploadId = $oXmlInit.GetChildContent("UploadId")
ConsoleWrite("UploadId = " & $sUploadId & @CRLF)

; We'll also need the XML file that contains a record of the parts
; with part numbers and ETags.  (This file was produced when parts were being uploaded.)
$oXmlPartsList = ObjCreate("Chilkat.Xml")
$bSuccess = $oXmlPartsList.LoadXmlFile("s3_multipart_uploads/partsList.xml")
If ($bSuccess <> True) Then
    ConsoleWrite("Did not find the partsList.xml XML file." & @CRLF)
    Exit
EndIf

$oRest = ObjCreate("Chilkat.Rest")

; Connect to the Amazon AWS REST server.
Local $bTls = True
Local $iPort = 443
Local $bAutoReconnect = True
$bSuccess = $oRest.Connect("s3.amazonaws.com",$iPort,$bTls,$bAutoReconnect)

; ----------------------------------------------------------------------------
; 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 = ObjCreate("Chilkat.AuthAws")
$oAuthAws.AccessKey = "AWS_ACCESS_KEY"
$oAuthAws.SecretKey = "AWS_SECRET_KEY"
$oAuthAws.ServiceName = "s3"

$bSuccess = $oRest.SetAuthAws($oAuthAws)

; Set the bucket name via the HOST header.
; In this case, the bucket name is "chilkat100".
$oRest.Host = "chilkat100.s3.amazonaws.com"

; The "uploadId=UploadId" must be added as a query parameter.  This allows it to be 
; incorporated into the AWS signature calculation, which is a requirement.
; Therefore, we use AddQueryParam:
$oRest.AddQueryParam("uploadId",$sUploadId)

; Our ObjectName in this case is "somethingBig.zip".
Local $sResponseXml = $oRest.FullRequestString("POST","/somethingBig.zip",$oXmlPartsList.GetXml())
If ($oRest.LastMethodSuccess <> True) Then
    ConsoleWrite($oRest.LastErrorText & @CRLF)
    Exit
EndIf

; When successful, the S3 Storage service will respond with a 200 response code,
; with an XML body.  
If ($oRest.ResponseStatusCode <> 200) Then
    ; Examine the request/response to see what happened.
    ConsoleWrite("response status code = " & $oRest.ResponseStatusCode & @CRLF)
    ConsoleWrite("response status text = " & $oRest.ResponseStatusText & @CRLF)
    ConsoleWrite("response header: " & $oRest.ResponseHeader & @CRLF)
    ConsoleWrite("response body: " & $sResponseXml & @CRLF)
    ConsoleWrite("---" & @CRLF)
    ConsoleWrite("LastRequestStartLine: " & $oRest.LastRequestStartLine & @CRLF)
    ConsoleWrite("LastRequestHeader: " & $oRest.LastRequestHeader & @CRLF)
EndIf

; Load the XML response into Chilkat XMl and emit via GetXml to see the XML in a pretty-printed (indented) readable format.
$oXml = ObjCreate("Chilkat.Xml")
$oXml.LoadXml($sResponseXml)
ConsoleWrite($oXml.GetXml() & @CRLF)
ConsoleWrite("----" & @CRLF)

ConsoleWrite("Multipart upload completed." & @CRLF)