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SQL Server Examples

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(SQL Server) Generate an AWS (S3) Pre-Signed URL using Signature V4

Demonstrates how to generate a pre-signed URL using AWS Signature Version 4. This example generates a pre-signed URL for the Amazon S3 service.

Note: this example requires Chilkat v9.5.0.66 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    DECLARE @sTmp0 nvarchar(4000)
    --  This example assumes the Chilkat HTTP API to have been previously unlocked.
    --  See HTTP Unlock Sample for sample code.

    --  Note: This example requires Chilkat v9.5.0.66 or greater.

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

    EXEC sp_OASetProperty @http, 'AwsAccessKey', 'AWS_ACCESS_KEY'
    EXEC sp_OASetProperty @http, 'AwsSecretKey', 'AWS_SECRET_KEY'

    --  Make sure to set your AWS region correctly
    EXEC sp_OASetProperty @http, 'AwsRegion', 'us-west-2'

    DECLARE @bucketName nvarchar(4000)
    SELECT @bucketName = 'chilkat.qa'
    DECLARE @objectName nvarchar(4000)
    SELECT @objectName = 'images/sea_creatures/starfish.jpg'
    DECLARE @localFilePath nvarchar(4000)
    SELECT @localFilePath = 'qa_output/starfish.jpg'
    DECLARE @awsService nvarchar(4000)
    SELECT @awsService = 's3'

    --  The signed URL will be valid for this number of seconds:
    DECLARE @numSecondsValid int
    SELECT @numSecondsValid = 86400

    --  Choose between a URL beginning with "http://" or "https://"...
    DECLARE @bUseHttps int
    SELECT @bUseHttps = 0

    --  Generate the pre-signed URL
    DECLARE @preSignedUrl nvarchar(4000)
    EXEC sp_OAMethod @http, 'S3_GenerateUrlV4', @preSignedUrl OUT, @bUseHttps, @bucketName, @objectName, @numSecondsValid, @awsService
    EXEC sp_OAGetProperty @http, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        RETURN
      END

    --  The following URL can be copy-and-pasted into a browser..

    PRINT 'Pre-Signed AWS S3 URL: ' + @preSignedUrl

    --  Here's an example of a pre-signed URL.
    --  This URL will only work within 1 day (86400 seconds) after the time this example was published.
    -- 
    --      http://chilkat.qa.s3.amazonaws.com/images/sea_creatures/starfish.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=16QXXDGY83AJJR6RVQ02%2F20170111%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20170111T161959Z&X-Amz-Expires=86400&X-Amz-SignedHeaders=host&X-Amz-Signature=72bf4fd9a15d7bbcdd313a3318d937a778905f62a3fbff9b789d8dc28acd9232

    --  Now try to do an HTTP Download using the signed URL.
    DECLARE @success int
    EXEC sp_OAMethod @http, 'Download', @success OUT, @preSignedUrl, 'qa_output/starfish.jpg'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
      END
    ELSE
      BEGIN

        PRINT 'Success.'
      END

    EXEC @hr = sp_OADestroy @http


END
GO

 

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