(SQL Server) Initiate Multipart S3 Upload

Initiates an Amazon AWS multipart S3 upload.

The following is quoted from the Amazon Simple Storage Service Documentation:

"The Multipart upload API enables you to upload large objects in parts. You can use this API to upload new large objects or make a copy of an existing object (see Operations on Objects).

Multipart uploading is a three-step process: You initiate the upload, you upload the object parts, and after you have uploaded all the parts, you complete the multipart upload. Upon receiving the complete multipart upload request, Amazon S3 constructs the object from the uploaded parts, and you can then access the object just as you would any other object in your bucket.

You can list of all your in-progress multipart uploads or get a list of the parts that you have uploaded for a specific multipart upload. Each of these operations is explained in this section.

Multipart Upload Initiation

When you send a request to initiate a multipart upload, Amazon S3 returns a response with an upload ID, which is a unique identifier for your multipart upload. You must include this upload ID whenever you upload parts, list the parts, complete an upload, or abort an upload. If you want to provide any metadata describing the object being uploaded, you must provide it in the request to initiate multipart upload."

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

// Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
//
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    DECLARE @sTmp0 nvarchar(4000)
    -- This example requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    -- Other S3 Multipart Upload Examples:
    -- S3 Upload Parts
    -- Complete Multipart Upload
    -- Abort Multipart Upload
    -- List Parts

    DECLARE @rest int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Rest', @rest OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Connect to the Amazon AWS REST server.
    DECLARE @bTls int
    SELECT @bTls = 1
    DECLARE @port int
    SELECT @port = 443
    DECLARE @bAutoReconnect int
    SELECT @bAutoReconnect = 1
    DECLARE @success int
    EXEC sp_OAMethod @rest, 'Connect', @success OUT, 's3.amazonaws.com', @port, @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.
    DECLARE @authAws int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.AuthAws', @authAws OUT

    EXEC sp_OASetProperty @authAws, 'AccessKey', 'AWS_ACCESS_KEY'
    EXEC sp_OASetProperty @authAws, 'SecretKey', 'AWS_SECRET_KEY'
    EXEC sp_OASetProperty @authAws, 'ServiceName', 's3'

    EXEC sp_OAMethod @rest, 'SetAuthAws', @success OUT, @authAws

    -- Set the bucket name via the HOST header.
    -- In this case, the bucket name is "chilkat100".
    EXEC sp_OASetProperty @rest, 'Host', 'chilkat100.s3.amazonaws.com'

    -- The local file path (on our local system) to upload.
    DECLARE @fileToUploadPath nvarchar(4000)
    SELECT @fileToUploadPath = 's3_multipart_uploads/somethingBig.zip'

    -- The HTTP request to initiate a multipart upload is a POST with no body content..
    -- This is the tricky part: We would be tempted to pass "/somethingBig.zip?uploads"
    -- in the 2nd argument to FullRequestNoBody.  However, we must pass only the path without query
    -- params.  The "uploads" query param must be added via AddQueryParam.  This allows it to be included
    -- in the AWS signature calculation for authentication.
    EXEC sp_OAMethod @rest, 'AddQueryParam', @success OUT, 'uploads', ''
    DECLARE @responseXml nvarchar(4000)
    EXEC sp_OAMethod @rest, 'FullRequestNoBody', @responseXml OUT, 'POST', '/somethingBig.zip'
    EXEC sp_OAGetProperty @rest, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @rest
        EXEC @hr = sp_OADestroy @authAws
        RETURN
      END

    -- When successful, the S3 Storage service will respond with a 200 response code,
    -- with an XML body.  
    EXEC sp_OAGetProperty @rest, 'ResponseStatusCode', @iTmp0 OUT
    IF @iTmp0 <> 200
      BEGIN
        -- Examine the request/response to see what happened.

        EXEC sp_OAGetProperty @rest, 'ResponseStatusCode', @iTmp0 OUT
        PRINT 'response status code = ' + @iTmp0

        EXEC sp_OAGetProperty @rest, 'ResponseStatusText', @sTmp0 OUT
        PRINT 'response status text = ' + @sTmp0

        EXEC sp_OAGetProperty @rest, 'ResponseHeader', @sTmp0 OUT
        PRINT 'response header: ' + @sTmp0

        PRINT 'response body: ' + @responseXml

        PRINT '---'

        EXEC sp_OAGetProperty @rest, 'LastRequestStartLine', @sTmp0 OUT
        PRINT 'LastRequestStartLine: ' + @sTmp0

        EXEC sp_OAGetProperty @rest, 'LastRequestHeader', @sTmp0 OUT
        PRINT 'LastRequestHeader: ' + @sTmp0
      END

    -- See http://docs.aws.amazon.com/AmazonS3/latest/API/mpUploadInitiate.html 
    -- for a sample of the XML response.

    PRINT @responseXml

    PRINT '----'

    -- Save the XML response to a file, and show the UploadId..
    DECLARE @xml int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Xml', @xml OUT

    EXEC sp_OAMethod @xml, 'LoadXml', @success OUT, @responseXml
    EXEC sp_OAMethod @xml, 'SaveXml', @success OUT, 's3_multipart_uploads/initiate.xml'


    EXEC sp_OAMethod @xml, 'GetChildContent', @sTmp0 OUT, 'UploadId'
    PRINT 'UploadId = ' + @sTmp0

    PRINT 'Multipart upload initiated.'

    EXEC @hr = sp_OADestroy @rest
    EXEC @hr = sp_OADestroy @authAws
    EXEC @hr = sp_OADestroy @xml


END
GO