Chilkat Examples

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(SQL Server) REST File Streaming Upload

Demonstrates how to stream the REST body from a file. This example demonstrates a REST upload to the Azure Cloud Storage service.

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.

    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 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".
    DECLARE @success int
    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_9_5_0.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

    -- Set some request headers.
    EXEC sp_OAMethod @rest, 'AddHeader', @success OUT, 'x-ms-blob-content-disposition', 'attachment; filename="hamlet.xml"'
    EXEC sp_OAMethod @rest, 'AddHeader', @success OUT, 'x-ms-blob-type', 'BlockBlob'
    EXEC sp_OAMethod @rest, 'AddHeader', @success OUT, 'x-ms-meta-m1', 'v1'
    EXEC sp_OAMethod @rest, 'AddHeader', @success OUT, 'x-ms-meta-m2', 'v2'

    -- Note: The application does not need to explicitly set the following
    -- headers: x-ms-date, Authorization, and Content-Length.  These headers
    -- are automatically set by Chilkat.

    DECLARE @fileStream int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Stream', @fileStream OUT

    EXEC sp_OASetProperty @fileStream, 'SourceFile', 'qa_data/xml/hamlet.xml'

    -- Upload to the Azure Cloud Storage service.
    -- The file is streamed, so the full file never has to completely reside in memory.
    -- The file is uploaded to the container named "test".
    DECLARE @responseStr nvarchar(4000)
    EXEC sp_OAMethod @rest, 'FullRequestStream', @responseStr OUT, 'PUT', '/test/hamlet.xml', @fileStream
    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 @fileStream
        RETURN
      END

    -- When successful, the Azure Storage service will respond with a 201 response code,
    -- with an empty body.  Therefore, in the success condition, the responseStr is empty.
    EXEC sp_OAGetProperty @rest, 'ResponseStatusCode', @iTmp0 OUT
    IF @iTmp0 = 201
      BEGIN

        PRINT 'File uploaded.'
      END
    ELSE
      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
      END

    EXEC @hr = sp_OADestroy @rest
    EXEC @hr = sp_OADestroy @azAuth
    EXEC @hr = sp_OADestroy @fileStream


END
GO

 

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