Chilkat Examples

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PureBasic Web API Examples

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(PureBasic) 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 PureBasic Module Download

Chilkat PureBasic Module

IncludeFile "CkStringBuilder.pb"
IncludeFile "CkRest.pb"
IncludeFile "CkJsonObject.pb"
IncludeFile "CkOAuth1.pb"

Procedure ChilkatExample()

    ; 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..
    json.i = CkJsonObject::ckCreate()
    If json.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i = CkJsonObject::ckLoadFile(json,"qa_data/tokens/twitter.json")

    rest.i = CkRest::ckCreate()
    If rest.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    oauth1.i = CkOAuth1::ckCreate()
    If oauth1.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkOAuth1::setCkConsumerKey(oauth1, "TWITTER_CONSUMER_KEY")
    CkOAuth1::setCkConsumerSecret(oauth1, "TWITTER_CONSUMER_SECRET")
    CkOAuth1::setCkToken(oauth1, CkJsonObject::ckStringOf(json,"oauth_token"))
    CkOAuth1::setCkTokenSecret(oauth1, CkJsonObject::ckStringOf(json,"oauth_token_secret"))
    CkOAuth1::setCkSignatureMethod(oauth1, "HMAC-SHA1")
    CkOAuth1::ckGenNonce(oauth1,16)

    CkRest::ckSetAuthOAuth1(rest,oauth1,0)

    bAutoReconnect.i = 1
    success = CkRest::ckConnect(rest,"api.twitter.com",443,1,bAutoReconnect)
    If success <> 1
        Debug CkRest::ckLastErrorText(rest)
        CkJsonObject::ckDispose(json)
        CkRest::ckDispose(rest)
        CkOAuth1::ckDispose(oauth1)
        ProcedureReturn
    EndIf

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

    ; This Twitter user has about 77.5K followers..
    CkRest::ckAddQueryParam(rest,"screen_name","MarcusMiller959")

    jsonResponse.i = CkJsonObject::ckCreate()
    If jsonResponse.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::setCkEmitCompact(jsonResponse, 0)

    ; Get the 1st page of results using a cursor of "-1".
    sbNextCursor.i = CkStringBuilder::ckCreate()
    If sbNextCursor.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkStringBuilder::ckSetString(sbNextCursor,"-1")

    pageNum.i = 1
    caseSensitive.i = 0
    bContinue.i = 1
    ; Get a maximum of 5 pages (of 5000 ids each).
    While bContinue = 1

        If CkStringBuilder::ckContentsEqual(sbNextCursor,"0",caseSensitive) = 1
            ; This will cause the loop to exit..
            bContinue = 0
        Else
            ; Adds or replaces the query param.
            CkRest::ckAddQueryParam(rest,"cursor",CkStringBuilder::ckGetAsString(sbNextCursor))

            ; Get the next page of follower IDs
            resp.s = CkRest::ckFullRequestNoBody(rest,"GET","/1.1/followers/ids.json")
            If CkRest::ckLastMethodSuccess(rest) <> 1
                Debug CkRest::ckLastErrorText(rest)
                CkJsonObject::ckDispose(json)
                CkRest::ckDispose(rest)
                CkOAuth1::ckDispose(oauth1)
                CkJsonObject::ckDispose(jsonResponse)
                CkStringBuilder::ckDispose(sbNextCursor)
                ProcedureReturn
            EndIf

            CkJsonObject::ckLoad(jsonResponse,resp)

            If CkRest::ckResponseStatusCode(rest) <> 200
                Debug CkJsonObject::ckEmit(jsonResponse)
                CkJsonObject::ckDispose(json)
                CkRest::ckDispose(rest)
                CkOAuth1::ckDispose(oauth1)
                CkJsonObject::ckDispose(jsonResponse)
                CkStringBuilder::ckDispose(sbNextCursor)
                ProcedureReturn
            EndIf

            ; Show the number of IDs returned in this 
            numIds.i = CkJsonObject::ckSizeOfArray(jsonResponse,"ids")
            Debug "Page " + Str(pageNum) + ", Number of Ids: " + Str(numIds)

            ; Show the 1st 10 ids in this page.
            i.i = 0
            While i < numIds
                CkJsonObject::setCkI(jsonResponse, i)
                Debug "    " + Str(i) + ": " + CkJsonObject::ckStringOf(jsonResponse,"ids[i]")

                i = i + 1
                If i > 10
                    ; Force the loop to exit.
                    i = numIds
                EndIf

            Wend

            pageNum = pageNum + 1
            If pageNum > 5
                bContinue = 0
            Else
                CkStringBuilder::ckSetString(sbNextCursor,CkJsonObject::ckStringOf(jsonResponse,"next_cursor_str"))
            EndIf

        EndIf

    Wend

    ; 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
    ; 


    CkJsonObject::ckDispose(json)
    CkRest::ckDispose(rest)
    CkOAuth1::ckDispose(oauth1)
    CkJsonObject::ckDispose(jsonResponse)
    CkStringBuilder::ckDispose(sbNextCursor)


    ProcedureReturn
EndProcedure

 

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