SQL Server

multipart/form-data HTTP POST

Demonstrates how to construct and send a multipart/form-data HTTP POST. SQL Server

-- 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

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

    -- Sends the following multipart/form-data POST:

    -- POST /xyz/something HTTP/1.1
    -- Host: domain
    -- Content-Type: multipart/form-data; boundary=------------090708030009010000030901
    -- Content-Length: 2220
    -- 
    -- --------------090708030009010000030901
    -- Content-Disposition: form-data; name="param1"
    -- 
    -- value1
    -- --------------090708030009010000030901
    -- Content-Disposition: form-data; name="param2"
    -- 
    -- value2
    -- --------------090708030009010000030901
    -- Content-Disposition: form-data; name="starfish20"; filename="starfish20.jpg"
    -- Content-Type: image/jpeg
    -- 
    -- JPEG DATA HERE...
    -- --------------090708030009010000030901
    -- Content-Disposition: form-data; name="helloWorld"; filename="helloWorld.pdf"
    -- Content-Type: application/pdf
    -- 
    -- PDF DATA HERE...
    -- --------------090708030009010000030901
    -- Content-Disposition: form-data; name="tinyA"; filename="tinyA.xml"
    -- Content-Type: text/xml
    -- 
    -- XML DATA HERE...
    -- --------------090708030009010000030901--
    -- 

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

    EXEC sp_OASetProperty @req, 'HttpVerb', 'POST'
    EXEC sp_OASetProperty @req, 'ContentType', 'multipart/form-data'
    EXEC sp_OASetProperty @req, 'Path', '/xyz/something'

    EXEC sp_OAMethod @req, 'AddParam', NULL, 'param1', 'value1'
    EXEC sp_OAMethod @req, 'AddParam', NULL, 'param2', 'value2'

    -- Add some small files to the request. (Small so we can see what the full request looks like without too much data..)
    DECLARE @bd int
    EXEC @hr = sp_OACreate 'Chilkat.BinData', @bd OUT

    EXEC sp_OAMethod @bd, 'LoadFile', @success OUT, 'qa_data/jpg/starfish20.jpg'
    EXEC sp_OAMethod @req, 'AddBdForUpload', @success OUT, 'starfish20', 'starfish20.jpg', @bd, 'image/jpeg'

    EXEC sp_OAMethod @bd, 'LoadFile', @success OUT, 'qa_data/pdf/helloWorld.pdf'
    EXEC sp_OAMethod @req, 'AddBdForUpload', @success OUT, 'helloWorld', 'helloWorld.pdf', @bd, 'application/pdf'

    EXEC sp_OAMethod @bd, 'LoadFile', @success OUT, 'qa_data/xml/tinyA.xml'
    EXEC sp_OAMethod @req, 'AddBdForUpload', @success OUT, 'tinyA', 'tinyA.xml', @bd, 'text/xml'

    DECLARE @http int
    EXEC @hr = sp_OACreate 'Chilkat.Http', @http OUT

    DECLARE @resp int
    EXEC @hr = sp_OACreate 'Chilkat.HttpResponse', @resp OUT

    EXEC sp_OAMethod @http, 'HttpSReq', @success OUT, 'example.com', 443, 1, @req, @resp
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @req
        EXEC @hr = sp_OADestroy @bd
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @resp
        RETURN
      END


    EXEC sp_OAGetProperty @resp, 'StatusCode', @iTmp0 OUT
    PRINT 'HTTP response status: ' + @iTmp0


    PRINT 'Received:'
    EXEC sp_OAGetProperty @resp, 'BodyStr', @sTmp0 OUT
    PRINT @sTmp0

    EXEC @hr = sp_OADestroy @req
    EXEC @hr = sp_OADestroy @bd
    EXEC @hr = sp_OADestroy @http
    EXEC @hr = sp_OADestroy @resp


END
GO