Send a REST Request with a Streamed Body

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Demonstrates Rest.FullRequestStream, which sends a complete request whose body is read from a Stream, then returns the response body as text.

The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

-- 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)
    DECLARE @success int
    SELECT @success = 0

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

    DECLARE @bTls int
    SELECT @bTls = 1
    DECLARE @bAutoReconnect int
    SELECT @bAutoReconnect = 1
    EXEC sp_OAMethod @rest, 'Connect', @success OUT, 'example.com', 443, @bTls, @bAutoReconnect
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @rest
        RETURN
      END

    --  The file paths are relative to the application's current working directory.  Absolute paths
    --  may also be used.  Supply the paths appropriate to your own environment.

    --  The request body is read from a Stream.  Here the stream's source is a local file, which is
    --  appropriate for large uploads because the data need not be held entirely in memory.
    DECLARE @bodyStream int
    EXEC @hr = sp_OACreate 'Chilkat.Stream', @bodyStream OUT

    EXEC sp_OASetProperty @bodyStream, 'SourceFile', 'qa_data/upload.json'

    EXEC sp_OAMethod @rest, 'AddHeader', @success OUT, 'Content-Type', 'application/json'

    --  The 3rd argument is the Stream that supplies the request body.
    DECLARE @responseText nvarchar(4000)
    EXEC sp_OAMethod @rest, 'FullRequestStream', @responseText OUT, 'POST', '/api/upload', @bodyStream
    EXEC sp_OAGetProperty @rest, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 = 0
      BEGIN
        EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @rest
        EXEC @hr = sp_OADestroy @bodyStream
        RETURN
      END

    PRINT @responseText

    EXEC @hr = sp_OADestroy @rest
    EXEC @hr = sp_OADestroy @bodyStream


END
GO