SQL Server
SQL Server
Upload File in Blocks (with Content-MD5 header) and Commit the Block List
See more Azure Cloud Storage Examples
Demonstrates how to upload a file in blocks and then commit the block list. This example includes a Content-MD5 header for each block.Chilkat SQL Server Downloads
-- 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
-- Important: Do not use nvarchar(max). See the warning about using nvarchar(max).
DECLARE @sTmp0 nvarchar(4000)
DECLARE @success int
SELECT @success = 0
-- Azure Blob Service Example: Upload a file in blocks, and then commit the block list.
-- See also: https://msdn.microsoft.com/en-us/library/azure/dd135726.aspx
-- This example requires the Chilkat API to have been previously unlocked.
-- See Global Unlock Sample for sample code.
DECLARE @rest int
EXEC @hr = sp_OACreate 'Chilkat.Rest', @rest OUT
IF @hr <> 0
BEGIN
PRINT 'Failed to create ActiveX component'
RETURN
END
-- Connect to the Azure Storage Blob Service
DECLARE @bTls int
SELECT @bTls = 1
DECLARE @port int
SELECT @port = 443
DECLARE @bAutoReconnect int
SELECT @bAutoReconnect = 1
-- In this example, the storage account name is "chilkat".
EXEC sp_OAMethod @rest, 'Connect', @success OUT, 'chilkat.blob.core.windows.net', @port, @bTls, @bAutoReconnect
IF @success <> 1
BEGIN
EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
PRINT @sTmp0
EXEC @hr = sp_OADestroy @rest
RETURN
END
-- Provide Azure Cloud credentials for the REST call.
DECLARE @azAuth int
EXEC @hr = sp_OACreate 'Chilkat.AuthAzureStorage', @azAuth OUT
EXEC sp_OASetProperty @azAuth, 'AccessKey', 'AZURE_ACCESS_KEY'
-- The account name used here should match the 1st part of the domain passed in the call to Connect (above).
EXEC sp_OASetProperty @azAuth, 'Account', 'chilkat'
EXEC sp_OASetProperty @azAuth, 'Scheme', 'SharedKey'
EXEC sp_OASetProperty @azAuth, 'Service', 'Blob'
-- This causes the "x-ms-version: 2021-08-06" header to be automatically added.
EXEC sp_OASetProperty @azAuth, 'XMsVersion', '2021-08-06'
EXEC sp_OAMethod @rest, 'SetAuthAzureStorage', @success OUT, @azAuth
-- Note: The application does not need to explicitly set the following
-- headers: Content-Length, x-ms-date, Authorization. These headers
-- are automatically set by Chilkat.
-- As the blocks are uploaded, we'll keep an XML block list for the subsequent commit..
DECLARE @xml int
EXEC @hr = sp_OACreate 'Chilkat.Xml', @xml OUT
EXEC sp_OASetProperty @xml, 'Tag', 'BlockList'
-- Any type of file can be uploaded in this way. It can a text file, binary file, anything...
-- This example will upload an XML file that is approximately 275K in size. It can be downloaded
-- at http://www.chilkatsoft.com/hamlet.xml
DECLARE @fac int
EXEC @hr = sp_OACreate 'Chilkat.FileAccess', @fac OUT
EXEC sp_OAMethod @fac, 'OpenForRead', @success OUT, 'qa_data/xml/hamlet.xml'
-- Assuming success for the example..
-- We'll upload in 16K blocks (normally a program would upload in larger block sizes than this,
-- but this is just an example...)
DECLARE @blockSize int
SELECT @blockSize = 16384
-- How many 16K blocks? (Including 1 for the last partial block)
DECLARE @numBlocks int
EXEC sp_OAMethod @fac, 'GetNumBlocks', @numBlocks OUT, @blockSize
DECLARE @crypt int
EXEC @hr = sp_OACreate 'Chilkat.Crypt2', @crypt OUT
EXEC sp_OASetProperty @crypt, 'HashAlgorithm', 'md5'
DECLARE @sbResponseBody int
EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sbResponseBody OUT
DECLARE @uriPath int
EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @uriPath OUT
DECLARE @blockId nvarchar(4000)
DECLARE @dataBlock int
EXEC @hr = sp_OACreate 'Chilkat.BinData', @dataBlock OUT
DECLARE @contentMd5 nvarchar(4000)
DECLARE @i int
SELECT @i = 0
WHILE @i < @numBlocks
BEGIN
EXEC sp_OAMethod @dataBlock, 'Clear', @success OUT
EXEC sp_OAMethod @fac, 'ReadBlockBd', @success OUT, @i, @blockSize, @dataBlock
IF @success = 0
BEGIN
EXEC sp_OAGetProperty @fac, 'LastErrorText', @sTmp0 OUT
PRINT @sTmp0
EXEC @hr = sp_OADestroy @rest
EXEC @hr = sp_OADestroy @azAuth
EXEC @hr = sp_OADestroy @xml
EXEC @hr = sp_OADestroy @fac
EXEC @hr = sp_OADestroy @crypt
EXEC @hr = sp_OADestroy @sbResponseBody
EXEC @hr = sp_OADestroy @uriPath
EXEC @hr = sp_OADestroy @dataBlock
RETURN
END
-- Generate a base64 block ID.
-- (Chilkat provides a helper method named GenBlockId to make this easy)
-- A pre-base64 encoded block ID length of 4 is sufficient in this case because
-- this file certainly won't have more than 99,999 blocks..
EXEC sp_OAMethod @fac, 'GenBlockId', @blockId OUT, @i, 4, 'base64'
-- Add this blockId to the list of blocks to be committed.
EXEC sp_OAMethod @xml, 'NewChild2', NULL, 'Latest', @blockId
-- Build the URI path
EXEC sp_OAMethod @uriPath, 'Clear', NULL
EXEC sp_OAMethod @uriPath, 'Append', @success OUT, '/mycontainer/hamlet.xml?comp=block&blockId='
EXEC sp_OAMethod @uriPath, 'Append', @success OUT, @blockId
EXEC sp_OAMethod @crypt, 'HashBdENC', @contentMd5 OUT, @dataBlock
EXEC sp_OAMethod @rest, 'AddHeader', @success OUT, 'Content-MD5', @contentMd5
-- Upload this block..
EXEC sp_OAMethod @sbResponseBody, 'Clear', NULL
EXEC sp_OAMethod @uriPath, 'GetAsString', @sTmp0 OUT
EXEC sp_OAMethod @rest, 'FullRequestBd', @success OUT, 'PUT', @sTmp0, @dataBlock, @sbResponseBody
IF @success = 0
BEGIN
EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
PRINT @sTmp0
EXEC @hr = sp_OADestroy @rest
EXEC @hr = sp_OADestroy @azAuth
EXEC @hr = sp_OADestroy @xml
EXEC @hr = sp_OADestroy @fac
EXEC @hr = sp_OADestroy @crypt
EXEC @hr = sp_OADestroy @sbResponseBody
EXEC @hr = sp_OADestroy @uriPath
EXEC @hr = sp_OADestroy @dataBlock
RETURN
END
-- Verify that we received a 201 status code.
EXEC sp_OAGetProperty @rest, 'ResponseStatusCode', @iTmp0 OUT
IF @iTmp0 <> 201
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
EXEC sp_OAMethod @sbResponseBody, 'GetAsString', @sTmp0 OUT
PRINT 'response body (if any): ' + @sTmp0
PRINT '---'
EXEC sp_OAGetProperty @rest, 'LastRequestStartLine', @sTmp0 OUT
PRINT 'LastRequestStartLine: ' + @sTmp0
EXEC sp_OAGetProperty @rest, 'LastRequestHeader', @sTmp0 OUT
PRINT 'LastRequestHeader: ' + @sTmp0
EXEC @hr = sp_OADestroy @rest
EXEC @hr = sp_OADestroy @azAuth
EXEC @hr = sp_OADestroy @xml
EXEC @hr = sp_OADestroy @fac
EXEC @hr = sp_OADestroy @crypt
EXEC @hr = sp_OADestroy @sbResponseBody
EXEC @hr = sp_OADestroy @uriPath
EXEC @hr = sp_OADestroy @dataBlock
RETURN
END
SELECT @i = @i + 1
END
EXEC sp_OAMethod @fac, 'FileClose', NULL
-- Now commit the blocks.
-- Let's have a look at the XML that will commit the blocks:
DECLARE @xmlStr nvarchar(4000)
EXEC sp_OAMethod @xml, 'GetXml', @xmlStr OUT
PRINT @xmlStr
-- The XML will look like this:
-- <?xml version="1.0" encoding="utf-8" ?>
-- <BlockList>
-- <Latest>MDAwMA==</Latest>
-- <Latest>MDAwMQ==</Latest>
-- <Latest>MDAwMg==</Latest>
-- <Latest>MDAwMw==</Latest>
-- <Latest>MDAwNA==</Latest>
-- <Latest>MDAwNQ==</Latest>
-- <Latest>MDAwNg==</Latest>
-- <Latest>MDAwNw==</Latest>
-- <Latest>MDAwOA==</Latest>
-- <Latest>MDAwOQ==</Latest>
-- <Latest>MDAxMA==</Latest>
-- <Latest>MDAxMQ==</Latest>
-- <Latest>MDAxMg==</Latest>
-- <Latest>MDAxMw==</Latest>
-- <Latest>MDAxNA==</Latest>
-- <Latest>MDAxNQ==</Latest>
-- <Latest>MDAxNg==</Latest>
-- <Latest>MDAxNw==</Latest>
-- </BlockList>
-- --------------------------------------------------------------------------
-- IMPORTANT: Remove the Content-MD5 header previously set in the loop above.
-- --------------------------------------------------------------------------
EXEC sp_OAMethod @rest, 'RemoveHeader', @success OUT, 'Content-MD5'
-- Send the PUT Block List...
DECLARE @responseStr nvarchar(4000)
EXEC sp_OAMethod @rest, 'FullRequestString', @responseStr OUT, 'PUT', '/mycontainer/hamlet.xml?comp=blocklist', @xmlStr
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 @azAuth
EXEC @hr = sp_OADestroy @xml
EXEC @hr = sp_OADestroy @fac
EXEC @hr = sp_OADestroy @crypt
EXEC @hr = sp_OADestroy @sbResponseBody
EXEC @hr = sp_OADestroy @uriPath
EXEC @hr = sp_OADestroy @dataBlock
RETURN
END
-- When successful, the Azure Storage service will respond with a 201 response status code,
-- with no response body.
EXEC sp_OAGetProperty @rest, 'ResponseStatusCode', @iTmp0 OUT
IF @iTmp0 <> 201
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 (if any): ' + @responseStr
PRINT '---'
EXEC sp_OAGetProperty @rest, 'LastRequestStartLine', @sTmp0 OUT
PRINT 'LastRequestStartLine: ' + @sTmp0
EXEC sp_OAGetProperty @rest, 'LastRequestHeader', @sTmp0 OUT
PRINT 'LastRequestHeader: ' + @sTmp0
EXEC @hr = sp_OADestroy @rest
EXEC @hr = sp_OADestroy @azAuth
EXEC @hr = sp_OADestroy @xml
EXEC @hr = sp_OADestroy @fac
EXEC @hr = sp_OADestroy @crypt
EXEC @hr = sp_OADestroy @sbResponseBody
EXEC @hr = sp_OADestroy @uriPath
EXEC @hr = sp_OADestroy @dataBlock
RETURN
END
PRINT 'Success.'
EXEC @hr = sp_OADestroy @rest
EXEC @hr = sp_OADestroy @azAuth
EXEC @hr = sp_OADestroy @xml
EXEC @hr = sp_OADestroy @fac
EXEC @hr = sp_OADestroy @crypt
EXEC @hr = sp_OADestroy @sbResponseBody
EXEC @hr = sp_OADestroy @uriPath
EXEC @hr = sp_OADestroy @dataBlock
END
GO