Chilkat Examples

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(PowerBuilder) 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

integer li_rc
oleobject loo_Json
integer li_Success
oleobject loo_Rest
oleobject loo_Oauth1
integer li_BAutoReconnect
oleobject loo_JsonResponse
oleobject loo_SbNextCursor
integer li_PageNum
integer li_CaseSensitive
integer li_BContinue
string ls_Resp
integer li_NumIds
integer i

// 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..
loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat_9_5_0.JsonObject")
if li_rc < 0 then
    destroy loo_Json
    MessageBox("Error","Connecting to COM object failed")
    return
end if
li_Success = loo_Json.LoadFile("qa_data/tokens/twitter.json")

loo_Rest = create oleobject
li_rc = loo_Rest.ConnectToNewObject("Chilkat_9_5_0.Rest")

loo_Oauth1 = create oleobject
li_rc = loo_Oauth1.ConnectToNewObject("Chilkat_9_5_0.OAuth1")

loo_Oauth1.ConsumerKey = "TWITTER_CONSUMER_KEY"
loo_Oauth1.ConsumerSecret = "TWITTER_CONSUMER_SECRET"
loo_Oauth1.Token = loo_Json.StringOf("oauth_token")
loo_Oauth1.TokenSecret = loo_Json.StringOf("oauth_token_secret")
loo_Oauth1.SignatureMethod = "HMAC-SHA1"
loo_Oauth1.GenNonce(16)

loo_Rest.SetAuthOAuth1(loo_Oauth1,0)

li_BAutoReconnect = 1
li_Success = loo_Rest.Connect("api.twitter.com",443,1,li_BAutoReconnect)
if li_Success <> 1 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Json
    destroy loo_Rest
    destroy loo_Oauth1
    return
end if

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

// This Twitter user has about 77.5K followers..
loo_Rest.AddQueryParam("screen_name","MarcusMiller959")

loo_JsonResponse = create oleobject
li_rc = loo_JsonResponse.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

loo_JsonResponse.EmitCompact = 0

// Get the 1st page of results using a cursor of "-1".
loo_SbNextCursor = create oleobject
li_rc = loo_SbNextCursor.ConnectToNewObject("Chilkat_9_5_0.StringBuilder")

loo_SbNextCursor.SetString("-1")

li_PageNum = 1
li_CaseSensitive = 0
li_BContinue = 1
// Get a maximum of 5 pages (of 5000 ids each).
do while li_BContinue = 1

    if loo_SbNextCursor.ContentsEqual("0",li_CaseSensitive) = 1 then
        // This will cause the loop to exit..
        li_BContinue = 0
    else
        // Adds or replaces the query param.
        loo_Rest.AddQueryParam("cursor",loo_SbNextCursor.GetAsString())

        // Get the next page of follower IDs
        ls_Resp = loo_Rest.FullRequestNoBody("GET","/1.1/followers/ids.json")
        if loo_Rest.LastMethodSuccess <> 1 then
            Write-Debug loo_Rest.LastErrorText
            destroy loo_Json
            destroy loo_Rest
            destroy loo_Oauth1
            destroy loo_JsonResponse
            destroy loo_SbNextCursor
            return
        end if

        loo_JsonResponse.Load(ls_Resp)

        if loo_Rest.ResponseStatusCode <> 200 then
            Write-Debug loo_JsonResponse.Emit()
            destroy loo_Json
            destroy loo_Rest
            destroy loo_Oauth1
            destroy loo_JsonResponse
            destroy loo_SbNextCursor
            return
        end if

        // Show the number of IDs returned in this 
        li_NumIds = loo_JsonResponse.SizeOfArray("ids")
        Write-Debug "Page " + string(li_PageNum) + ", Number of Ids: " + string(li_NumIds)

        // Show the 1st 10 ids in this page.
        i = 0
        do while i < li_NumIds
            loo_JsonResponse.I = i
            Write-Debug "    " + string(i) + ": " + loo_JsonResponse.StringOf("ids[i]")

            i = i + 1
            if i > 10 then
                // Force the loop to exit.
                i = li_NumIds
            end if

        loop

        li_PageNum = li_PageNum + 1
        if li_PageNum > 5 then
            li_BContinue = 0
        else
            loo_SbNextCursor.SetString(loo_JsonResponse.StringOf("next_cursor_str"))
        end if

    end if

loop

// 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
// 


destroy loo_Json
destroy loo_Rest
destroy loo_Oauth1
destroy loo_JsonResponse
destroy loo_SbNextCursor

 

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