Poll a Socket for Available Data

See more Socket/SSL/TLS Examples

Demonstrates Socket.PollDataAvailable, which performs a nonblocking check for readable activity and returns whether data or another read-ready condition is present.

--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

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

    --  Connect to the server using TLS.
    DECLARE @bTls int
    SELECT @bTls = 1
    DECLARE @maxWaitMs int
    SELECT @maxWaitMs = 5000
    EXEC sp_OAMethod @socket, 'Connect', @success OUT, 'example.com', 5000, @bTls, @maxWaitMs
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @socket, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @socket
        RETURN
      END

    --  Perform a nonblocking check for readable data.  Returns 1 when data or another read-ready
    --  condition is present, and 0 when nothing is immediately available.
    DECLARE @bAvailable int
    EXEC sp_OAMethod @socket, 'PollDataAvailable', @bAvailable OUT
    IF @bAvailable <> 1
      BEGIN

        PRINT 'No data is immediately available.'
      END
    ELSE
      BEGIN

        PRINT 'Data is available to read.'
      END

    EXEC @hr = sp_OADestroy @socket


END
GO