Chilkat Examples

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SQL Server Web API Examples

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(SQL Server) Twitter - Get Follower IDs

Demonstrates how to get a list of follower IDs for a Twitter user. If the number of followers is more than can be returned in a single response, this example will use cursors to page through the followers.

Note: Rate limits will prevent a program from paging through huge lists of followers. In general, a maximum of 16 GET requests (pages) can be retrieved in a short period of time.

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.

    -- ----------------------------------------------------------------------
    -- This initial setup, which involves setting the OAuth1 properties and connecting
    -- to api.twitter.com, is only required once at the beginning.  Once connected, the same
    -- object instance may be re-used, and if necessary, it will automatically reconnect
    -- as needed.

    -- Assume we've previously obtained an access token and saved it to a JSON file..
    DECLARE @json int
    -- Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @json OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @success int
    EXEC sp_OAMethod @json, 'LoadFile', @success OUT, 'qa_data/tokens/twitter.json'

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

    DECLARE @oauth1 int
    -- Use "Chilkat_9_5_0.OAuth1" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.OAuth1', @oauth1 OUT

    EXEC sp_OASetProperty @oauth1, 'ConsumerKey', 'TWITTER_CONSUMER_KEY'
    EXEC sp_OASetProperty @oauth1, 'ConsumerSecret', 'TWITTER_CONSUMER_SECRET'
    EXEC sp_OAMethod @json, 'StringOf', @sTmp0 OUT, 'oauth_token'
    EXEC sp_OASetProperty @oauth1, 'Token', @sTmp0
    EXEC sp_OAMethod @json, 'StringOf', @sTmp0 OUT, 'oauth_token_secret'
    EXEC sp_OASetProperty @oauth1, 'TokenSecret', @sTmp0
    EXEC sp_OASetProperty @oauth1, 'SignatureMethod', 'HMAC-SHA1'
    EXEC sp_OAMethod @oauth1, 'GenNonce', @success OUT, 16

    EXEC sp_OAMethod @rest, 'SetAuthOAuth1', @success OUT, @oauth1, 0

    DECLARE @bAutoReconnect int
    SELECT @bAutoReconnect = 1
    EXEC sp_OAMethod @rest, 'Connect', @success OUT, 'api.twitter.com', 443, 1, @bAutoReconnect
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @rest
        EXEC @hr = sp_OADestroy @oauth1
        RETURN
      END

    -- This ends the initial setup...
    -- ----------------------------------------------------------------------

    -- This Twitter user has about 77.5K followers..
    EXEC sp_OAMethod @rest, 'AddQueryParam', @success OUT, 'screen_name', 'MarcusMiller959'

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

    EXEC sp_OASetProperty @jsonResponse, 'EmitCompact', 0

    -- Get the 1st page of results using a cursor of "-1".
    DECLARE @sbNextCursor int
    -- Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sbNextCursor OUT

    EXEC sp_OAMethod @sbNextCursor, 'SetString', @success OUT, '-1'

    DECLARE @pageNum int
    SELECT @pageNum = 1
    DECLARE @caseSensitive int
    SELECT @caseSensitive = 0
    DECLARE @bContinue int
    SELECT @bContinue = 1
    -- Get a maximum of 5 pages (of 5000 ids each).
    WHILE @bContinue = 1
      BEGIN

        EXEC sp_OAMethod @sbNextCursor, 'ContentsEqual', @iTmp0 OUT, '0', @caseSensitive
        IF @iTmp0 = 1
          BEGIN
            -- This will cause the loop to exit..
            SELECT @bContinue = 0
          END
        ELSE
          BEGIN
            -- Adds or replaces the query param.
            EXEC sp_OAMethod @sbNextCursor, 'GetAsString', @sTmp0 OUT
            EXEC sp_OAMethod @rest, 'AddQueryParam', @success OUT, 'cursor', @sTmp0

            -- Get the next page of follower IDs
            DECLARE @resp nvarchar(4000)
            EXEC sp_OAMethod @rest, 'FullRequestNoBody', @resp OUT, 'GET', '/1.1/followers/ids.json'
            EXEC sp_OAGetProperty @rest, 'LastMethodSuccess', @iTmp0 OUT
            IF @iTmp0 <> 1
              BEGIN
                EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
                PRINT @sTmp0
                EXEC @hr = sp_OADestroy @json
                EXEC @hr = sp_OADestroy @rest
                EXEC @hr = sp_OADestroy @oauth1
                EXEC @hr = sp_OADestroy @jsonResponse
                EXEC @hr = sp_OADestroy @sbNextCursor
                RETURN
              END

            EXEC sp_OAMethod @jsonResponse, 'Load', @success OUT, @resp

            EXEC sp_OAGetProperty @rest, 'ResponseStatusCode', @iTmp0 OUT
            IF @iTmp0 <> 200
              BEGIN
                EXEC sp_OAMethod @jsonResponse, 'Emit', @sTmp0 OUT
                PRINT @sTmp0
                EXEC @hr = sp_OADestroy @json
                EXEC @hr = sp_OADestroy @rest
                EXEC @hr = sp_OADestroy @oauth1
                EXEC @hr = sp_OADestroy @jsonResponse
                EXEC @hr = sp_OADestroy @sbNextCursor
                RETURN
              END

            -- Show the number of IDs returned in this 
            DECLARE @numIds int
            EXEC sp_OAMethod @jsonResponse, 'SizeOfArray', @numIds OUT, 'ids'


            PRINT 'Page ' + @pageNum + ', Number of Ids: ' + @numIds

            -- Show the 1st 10 ids in this page.
            DECLARE @i int
            SELECT @i = 0
            WHILE @i < @numIds
              BEGIN
                EXEC sp_OASetProperty @jsonResponse, 'I', @i


                EXEC sp_OAMethod @jsonResponse, 'StringOf', @sTmp0 OUT, 'ids[i]'
                PRINT '    ' + @i + ': ' + @sTmp0

                SELECT @i = @i + 1
                IF @i > 10
                  BEGIN
                    -- Force the loop to exit.
                    SELECT @i = @numIds
                  END
              END

            SELECT @pageNum = @pageNum + 1
            IF @pageNum > 5
              BEGIN
                SELECT @bContinue = 0
              END
            ELSE
              BEGIN
                EXEC sp_OAMethod @jsonResponse, 'StringOf', @sTmp0 OUT, 'next_cursor_str'
                EXEC sp_OAMethod @sbNextCursor, 'SetString', @success OUT, @sTmp0
              END
          END
      END

    -- A successful JSON response for the 1st page looks like this:

    -- 	{
    -- 	  "ids": [
    -- 	    3140496044,
    -- 	    793204773751324672,
    -- 	    789951187781050369,
    -- 	    763520773587922945,
    -- 	    ...
    -- 	    15031286,
    -- 	    2668251246,
    -- 	    3751659443
    -- 	  ],
    -- 	  "next_cursor": 1531680438812851153,
    -- 	  "next_cursor_str": "1531680438812851153",
    -- 	  "previous_cursor": 0,
    -- 	  "previous_cursor_str": "0"
    -- 	}

    -- The output of this program looks like this:

    -- 	Page 1, Number of Ids: 5000
    -- 	    0: 931953350
    -- 	    1: 786708055
    -- 	    2: 560845700
    -- 	    3: 3140496044
    -- 	    4: 793204773751324672
    -- 	    5: 789951187781050369
    -- 	    6: 763520773587922945
    -- 	    7: 793143274059988992
    -- 	    8: 793139683412762624
    -- 	    9: 1588222783
    -- 	    10: 703821370778451968
    -- 	Page 2, Number of Ids: 5000
    -- 	    0: 15031286
    -- 	    1: 2668251246
    -- 	    2: 3751659443
    -- 	    3: 3324584493
    -- 	    4: 2440214809
    -- 	    5: 1322335441
    -- 	    6: 4439178393
    -- 	    7: 4911573711
    -- 	    8: 720792880080560128
    -- 	    9: 720805087124267008
    -- 	    10: 172926330
    -- 	Page 3, Number of Ids: 5000
    -- 	    0: 93867176
    -- 	    1: 2992946183
    -- 	    2: 2825296077
    -- 	    3: 3784572861
    -- 	    4: 2150051321
    -- 	    5: 2460881603
    -- 	    6: 4128849341
    -- 	    7: 2234697931
    -- 	    8: 2379418164
    -- 	    9: 3425171542
    -- 	    10: 325759186
    -- 	Page 4, Number of Ids: 5000
    -- 	    0: 22793412
    -- 	    1: 3347750489
    -- 	    2: 316923043
    -- 	    3: 2481719196
    -- 	    4: 3363591905
    -- 	    5: 3238116492
    -- 	    6: 58467130
    -- 	    7: 3015182362
    -- 	    8: 2985342719
    -- 	    9: 3095965720
    -- 	    10: 17505957
    -- 	Page 5, Number of Ids: 5000
    -- 	    0: 2541434684
    -- 	    1: 140022957
    -- 	    2: 134845054
    -- 	    3: 772810508
    -- 	    4: 16979294
    -- 	    5: 2320540225
    -- 	    6: 105439442
    -- 	    7: 2796744529
    -- 	    8: 251128801
    -- 	    9: 350229758
    -- 	    10: 2683994716
    -- 

    EXEC @hr = sp_OADestroy @json
    EXEC @hr = sp_OADestroy @rest
    EXEC @hr = sp_OADestroy @oauth1
    EXEC @hr = sp_OADestroy @jsonResponse
    EXEC @hr = sp_OADestroy @sbNextCursor


END
GO

 

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