(SQL Server) Example: Http.HttpReq method

Demonstrates how to call the HttpReq method.

Note: This example requires Chilkat v11.0.0 or greater.

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

    SELECT @success = 0

    -- This example will send an HTTP POST with the body of the HTTP request containing JSON.

    -- Create the following JSON: { "name": "Harry", "state": "FL" }

    DECLARE @json int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @json OUT

    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'name', 'Harry'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'state', 'FL'

    -- Specify the details of the request
    DECLARE @req int
    EXEC @hr = sp_OACreate 'Chilkat.HttpRequest', @req OUT

    EXEC sp_OASetProperty @req, 'HttpVerb', 'POST'
    EXEC sp_OASetProperty @req, 'ContentType', 'application/json'
    EXEC sp_OAMethod @json, 'Emit', @sTmp0 OUT
    EXEC sp_OAMethod @req, 'LoadBodyFromString', @success OUT, @sTmp0, 'utf-8'

    -- Send the charset attribute in the HTTP request header.
    EXEC sp_OASetProperty @req, 'SendCharset', 1
    EXEC sp_OASetProperty @req, 'Charset', 'utf-8'

    -- Send the POST
    -- You can send the POST to the URL below.  
    -- The response will contain the raw body of the request that was sent.
    -- (i.e. everything except the HTTP request header).

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

    EXEC sp_OAMethod @http, 'HttpReq', @success OUT, 'https://www.chilkatsoft.com/echo_request_body.asp', @req, @resp
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @req
        EXEC @hr = sp_OADestroy @resp
        RETURN
      END

    -- Examine the HTTP request header we sent:
    EXEC sp_OAGetProperty @http, 'LastHeader', @sTmp0 OUT
    PRINT @sTmp0

    -- The response body contains the raw content of the HTTP request body we sent.
    EXEC sp_OAGetProperty @resp, 'BodyStr', @sTmp0 OUT
    PRINT @sTmp0

    -- Sample output:

    -- POST /echo_request_body.asp HTTP/1.1
    -- Host: www.chilkatsoft.com
    -- Content-Type: application/json; charset=utf-8
    -- Content-Length: 29
    -- 
    -- 
    -- {"name":"Harry","state":"FL"}

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


END
GO