(SQL Server) Example: Http.ClearHeaders method

Demonstrates how to call the ClearHeaders method.

Also see: Chilkat Http Default and Auto-Filled Headers

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
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

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

    -- Add a request header.
    EXEC sp_OAMethod @http, 'SetRequestHeader', NULL, 'X-Something', '1234'
    EXEC sp_OAMethod @http, 'SetRequestHeader', NULL, 'X-Example', '5678'

    DECLARE @responseBody nvarchar(4000)
    EXEC sp_OAMethod @http, 'QuickGetStr', @responseBody OUT, 'https://chilkatsoft.com/helloWorld.txt'
    -- Examine the request header we just sent..
    EXEC sp_OAGetProperty @http, 'LastHeader', @sTmp0 OUT
    PRINT @sTmp0

    PRINT '----'

    -- Output:

    -- GET /helloWorld.txt HTTP/1.1
    -- Host: chilkatsoft.com
    -- Accept: */*
    -- Accept-Encoding: gzip
    -- X-Something: 1234
    -- X-Example: 5678

    -- Remove the request headers we previously added:
    EXEC sp_OAMethod @http, 'ClearHeaders', NULL

    EXEC sp_OAMethod @http, 'QuickGetStr', @responseBody OUT, 'https://chilkatsoft.com/helloWorld.txt'
    EXEC sp_OAGetProperty @http, 'LastHeader', @sTmp0 OUT
    PRINT @sTmp0

    -- Output:

    -- GET /helloWorld.txt HTTP/1.1
    -- Host: chilkatsoft.com
    -- Accept: */*
    -- Accept-Encoding: gzip

    EXEC @hr = sp_OADestroy @http


END
GO