SQL Server

Iterate Pages in Feed

See more Facebook Examples

Demonstrates how to read the next page in the user's Facebook feed, and iterates through all of the pages in the Facebook feed. 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.

    -- This example assumes a previously obtained an access token
    DECLARE @oauth2 int
    EXEC @hr = sp_OACreate 'Chilkat.OAuth2', @oauth2 OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OASetProperty @oauth2, 'AccessToken', 'FACEBOOK-ACCESS-TOKEN'

    DECLARE @rest int
    EXEC @hr = sp_OACreate 'Chilkat.Rest', @rest OUT

    -- Connect to Facebook and send the following GET request:
    EXEC sp_OAMethod @rest, 'Connect', @success OUT, 'graph.facebook.com', 443, 1, 1
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @oauth2
        EXEC @hr = sp_OADestroy @rest
        RETURN
      END

    -- Provide the authentication credentials (i.e. the access key)
    EXEC sp_OAMethod @rest, 'SetAuthOAuth2', @success OUT, @oauth2

    -- Gets the 1st page in the user's feed.
    DECLARE @responseJson nvarchar(4000)
    EXEC sp_OAMethod @rest, 'FullRequestNoBody', @responseJson OUT, 'GET', '/v2.7/me/feed'
    EXEC sp_OAGetProperty @rest, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @oauth2
        EXEC @hr = sp_OADestroy @rest
        RETURN
      END

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

    EXEC sp_OASetProperty @json, 'EmitCompact', 0
    EXEC sp_OAMethod @json, 'Load', @success OUT, @responseJson

    -- 
    -- See Parsing the Facebook User Feed for code showing how to parse the JSON feed content.
    -- 

    DECLARE @nextUrl int
    EXEC @hr = sp_OACreate 'Chilkat.Url', @nextUrl OUT

    -- Get the URL for the next page in the feed.
    DECLARE @nextUrlStr nvarchar(4000)
    EXEC sp_OAMethod @json, 'StringOf', @nextUrlStr OUT, 'paging.next'
    EXEC sp_OAGetProperty @json, 'LastMethodSuccess', @iTmp0 OUT
    WHILE @iTmp0 = 1
      BEGIN


        PRINT 'Next page URL: ' + @nextUrlStr

        EXEC sp_OAMethod @nextUrl, 'ParseUrl', @success OUT, @nextUrlStr

        -- Prepare for getting the next page in the feed.
        -- We can continue using the same REST object.
        -- If already connected, we'll continue using the existing connection.
        -- Otherwise, a new connection will automatically be made if needed.
        EXEC sp_OAMethod @rest, 'ClearAllQueryParams', @success OUT
        EXEC sp_OAGetProperty @nextUrl, 'Query', @sTmp0 OUT
        EXEC sp_OAMethod @rest, 'AddQueryParams', @success OUT, @sTmp0

        EXEC sp_OAMethod @rest, 'FullRequestNoBody', @responseJson OUT, 'GET', '/v2.7/me/feed'
        EXEC sp_OAGetProperty @rest, 'LastMethodSuccess', @iTmp0 OUT
        IF @iTmp0 <> 1
          BEGIN
            EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
            PRINT @sTmp0
            EXEC @hr = sp_OADestroy @oauth2
            EXEC @hr = sp_OADestroy @rest
            EXEC @hr = sp_OADestroy @json
            EXEC @hr = sp_OADestroy @nextUrl
            RETURN
          END

        EXEC sp_OAMethod @json, 'Load', @success OUT, @responseJson
        -- See Parsing the Facebook User Feed for code showing how to parse the JSON feed content.

        -- Get the URL for the next page.
        EXEC sp_OAMethod @json, 'StringOf', @nextUrlStr OUT, 'paging.next'
      END


    PRINT 'No more pages in the feed.'

    EXEC @hr = sp_OADestroy @oauth2
    EXEC @hr = sp_OADestroy @rest
    EXEC @hr = sp_OADestroy @json
    EXEC @hr = sp_OADestroy @nextUrl


END
GO