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(SQL Server) Download Text File to a String Variable

This example demonstrates how to download the content of a text file from Google Drive into a string variable.

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)
    DECLARE @success int
    SELECT @success = 1

    --  It requires the Chilkat API to have been previously unlocked.
    --  See Global Unlock Sample for sample code.

    --  This example uses a previously obtained access token having permission for the
    --  Google Drive scope.

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

    EXEC sp_OASetProperty @gAuth, 'AccessToken', 'GOOGLE-DRIVE-ACCESS-TOKEN'

    DECLARE @rest int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Rest', @rest OUT

    --  Connect using TLS.
    --  A single REST object, once connected, can be used for many Google Drive REST API calls.
    --  The auto-reconnect indicates that if the already-established HTTPS connection is closed,
    --  then it will be automatically re-established as needed.
    DECLARE @bAutoReconnect int
    SELECT @bAutoReconnect = 1
    EXEC sp_OAMethod @rest, 'Connect', @success OUT, 'www.googleapis.com', 443, 1, @bAutoReconnect

    --  Provide the authentication credentials (i.e. the access token)
    EXEC sp_OAMethod @rest, 'SetAuthGoogle', @success OUT, @gAuth

    --  ------------------------------------------------------------------------------
    --  To download a file, we must know the file ID.
    --  In a previous example (see Build Local Metadata Cache
    --  we built a local cache to make it easy to lookup file IDs given a file path.
    --  Let's say we want to download "testFolder/abc/123/pigs.json".
    --  First we lookup the fileId in the cache.  With the fileId, we can download the file.
    DECLARE @gdCache int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Cache', @gdCache OUT

    EXEC sp_OASetProperty @gdCache, 'Level', 0
    EXEC sp_OAMethod @gdCache, 'AddRoot', NULL, 'C:/ckCache/googleDrive'

    DECLARE @fileId nvarchar(4000)
    EXEC sp_OAMethod @gdCache, 'FetchText', @fileId OUT, 'testFolder/abc/123/pigs.json'
    EXEC sp_OAGetProperty @gdCache, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN

        PRINT 'Filepath not found in cache.'
        EXEC @hr = sp_OADestroy @gAuth
        EXEC @hr = sp_OADestroy @rest
        EXEC @hr = sp_OADestroy @gdCache
        RETURN
      END

    --  We need to send a GET request like this:
    --  GET https://www.googleapis.com/drive/v3/files/fileId?alt=media
    --  The fileId is part of the path.
    DECLARE @sbPath int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.StringBuilder', @sbPath OUT

    EXEC sp_OAMethod @sbPath, 'Append', @success OUT, '/drive/v3/files/'
    EXEC sp_OAMethod @sbPath, 'Append', @success OUT, @fileId
    EXEC sp_OAMethod @rest, 'AddQueryParam', @success OUT, 'alt', 'media'

    --  The FullRequestNoBody returns the file content in the response body.
    DECLARE @fileContent nvarchar(4000)
    EXEC sp_OAMethod @sbPath, 'GetAsString', @sTmp0 OUT
    EXEC sp_OAMethod @rest, 'FullRequestNoBody', @fileContent OUT, 'GET', @sTmp0
    EXEC sp_OAGetProperty @rest, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @gAuth
        EXEC @hr = sp_OADestroy @rest
        EXEC @hr = sp_OADestroy @gdCache
        EXEC @hr = sp_OADestroy @sbPath
        RETURN
      END

    --  A successful response will have a status code equal to 200.
    EXEC sp_OAGetProperty @rest, 'ResponseStatusCode', @iTmp0 OUT
    IF @iTmp0 <> 200
      BEGIN

        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 @hr = sp_OADestroy @gAuth
        EXEC @hr = sp_OADestroy @rest
        EXEC @hr = sp_OADestroy @gdCache
        EXEC @hr = sp_OADestroy @sbPath
        RETURN
      END


    PRINT @fileContent


    PRINT 'File downloaded.'

    EXEC @hr = sp_OADestroy @gAuth
    EXEC @hr = sp_OADestroy @rest
    EXEC @hr = sp_OADestroy @gdCache
    EXEC @hr = sp_OADestroy @sbPath


END
GO

 

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