(SQL Server) Send HTTP POST using non-UTF8 such as Windows-1250

Demonstrates how to specify the character encoding (charset) to be used for the body of an HTTP POST.

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
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- This example requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @http int
    -- Use "Chilkat_9_5_0.Http" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Http', @http OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @req int
    -- Use "Chilkat_9_5_0.HttpRequest" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.HttpRequest', @req OUT

    -- Load a JSON file containing strings with Polish chars.
    DECLARE @json int
    -- Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @json OUT

    DECLARE @success int
    EXEC sp_OAMethod @json, 'LoadFile', @success OUT, 'qa_data/json/has_polish_chars.json'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @json, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @req
        EXEC @hr = sp_OADestroy @json
        RETURN
      END

    -- Add the request params expected by the server-side:
    EXEC sp_OAMethod @json, 'StringOf', @sTmp0 OUT, 'tytul'
    EXEC sp_OAMethod @req, 'AddParam', NULL, 'tytul', @sTmp0
    EXEC sp_OAMethod @json, 'StringOf', @sTmp0 OUT, 'tresc'
    EXEC sp_OAMethod @req, 'AddParam', NULL, 'tresc', @sTmp0

    -- Indicate we wish to explicitly send the charset attribute in the HTTP request header.
    EXEC sp_OASetProperty @req, 'SendCharset', 1

    -- Send the POST
    -- You can send the POST to the URL below.  It will respond with the request body in quoted-printable format.
    -- Using quoted-printable, we can easily see the binary bytes for the accented chars.
    DECLARE @resp int

    EXEC sp_OAMethod @http, 'PostUrlEncoded', @resp OUT, 'https://www.chilkatsoft.com/echoPost.cshtml', @req
    EXEC sp_OAGetProperty @http, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @req
        EXEC @hr = sp_OADestroy @json
        RETURN
      END

    EXEC sp_OAGetProperty @http, 'LastHeader', @sTmp0 OUT
    PRINT @sTmp0
    EXEC sp_OAGetProperty @resp, 'BodyStr', @sTmp0 OUT
    PRINT @sTmp0

    -- Sample output:

    -- --------------------------------------------------
    -- POST /echoPost.cshtml HTTP/1.1
    -- Host: www.chilkatsoft.com
    -- Content-Type: application/x-www-form-urlencoded; charset=utf-8
    -- Content-Length: 79
    -- 
    -- <pre>tytul=3DPrzyk%C5%82ad&amp;tresc=3DPrzyk%C5%82ad
    -- %82oszenie</pre>
    -- --------------------------------------------------

    -- We can see by the %C5%82 that utf-8 was sent, because %C5%82 is the 2-byte representation of a particular Polish char.

    EXEC @hr = sp_OADestroy @resp

    -- -----------------------
    -- However.. we can change the charset used for the HTTP request by specifying the request object's charset.

    EXEC sp_OASetProperty @req, 'SendCharset', 1
    EXEC sp_OASetProperty @req, 'Charset', 'windows-1250'

    EXEC sp_OAMethod @http, 'PostUrlEncoded', @resp OUT, 'https://www.chilkatsoft.com/echoPost.cshtml', @req
    EXEC sp_OAGetProperty @http, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @req
        EXEC @hr = sp_OADestroy @json
        RETURN
      END

    EXEC sp_OAGetProperty @http, 'LastHeader', @sTmp0 OUT
    PRINT @sTmp0
    EXEC sp_OAGetProperty @resp, 'BodyStr', @sTmp0 OUT
    PRINT @sTmp0

    -- Sample output...
    -- You can see how the bytes used for the Polish chars are now 1-byte per char (i.e. using Windows-1250) 

    -- --------------------------------------------------
    -- POST /echoPost.cshtml HTTP/1.1
    -- Host: www.chilkatsoft.com
    -- Content-Type: application/x-www-form-urlencoded; charset=windows-1250
    -- Content-Length: 70
    -- 
    -- <pre>tytul=3DPrzyk%B3ad&amp;tresc=3DPrzyk%B3ad
    -- e</pre>
    -- --------------------------------------------------

    EXEC @hr = sp_OADestroy @resp


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


END
GO