Chilkat Examples

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Tcl Web API Examples

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(Tcl) 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 Tcl Extension Downloads

Chilkat Tcl Extension Downloads

load ./chilkat.dll

# 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..
set json [new_CkJsonObject]

set success [CkJsonObject_LoadFile $json "qa_data/tokens/twitter.json"]

set rest [new_CkRest]

set oauth1 [new_CkOAuth1]

CkOAuth1_put_ConsumerKey $oauth1 "TWITTER_CONSUMER_KEY"
CkOAuth1_put_ConsumerSecret $oauth1 "TWITTER_CONSUMER_SECRET"
CkOAuth1_put_Token $oauth1 [CkJsonObject_stringOf $json "oauth_token"]
CkOAuth1_put_TokenSecret $oauth1 [CkJsonObject_stringOf $json "oauth_token_secret"]
CkOAuth1_put_SignatureMethod $oauth1 "HMAC-SHA1"
CkOAuth1_GenNonce $oauth1 16

CkRest_SetAuthOAuth1 $rest $oauth1 0

set bAutoReconnect 1
set success [CkRest_Connect $rest "api.twitter.com" 443 1 $bAutoReconnect]
if {$success != 1} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkJsonObject $json
    delete_CkRest $rest
    delete_CkOAuth1 $oauth1
    exit
}

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

# This Twitter user has about 77.5K followers..
CkRest_AddQueryParam $rest "screen_name" "MarcusMiller959"

set jsonResponse [new_CkJsonObject]

CkJsonObject_put_EmitCompact $jsonResponse 0

# Get the 1st page of results using a cursor of "-1".
set sbNextCursor [new_CkStringBuilder]

CkStringBuilder_SetString $sbNextCursor "-1"

set pageNum 1
set caseSensitive 0
set bContinue 1
# Get a maximum of 5 pages (of 5000 ids each).
while {$bContinue == 1} {

    if {[CkStringBuilder_ContentsEqual $sbNextCursor "0" $caseSensitive] == 1} then {
        # This will cause the loop to exit..
        set bContinue 0
    }     else {
        # Adds or replaces the query param.
        CkRest_AddQueryParam $rest "cursor" [CkStringBuilder_getAsString $sbNextCursor]

        # Get the next page of follower IDs
        set resp [CkRest_fullRequestNoBody $rest "GET" "/1.1/followers/ids.json"]
        if {[CkRest_get_LastMethodSuccess $rest] != 1} then {
            puts [CkRest_lastErrorText $rest]
            delete_CkJsonObject $json
            delete_CkRest $rest
            delete_CkOAuth1 $oauth1
            delete_CkJsonObject $jsonResponse
            delete_CkStringBuilder $sbNextCursor
            exit
        }

        CkJsonObject_Load $jsonResponse $resp

        if {[CkRest_get_ResponseStatusCode $rest] != 200} then {
            puts [CkJsonObject_emit $jsonResponse]
            delete_CkJsonObject $json
            delete_CkRest $rest
            delete_CkOAuth1 $oauth1
            delete_CkJsonObject $jsonResponse
            delete_CkStringBuilder $sbNextCursor
            exit
        }

        # Show the number of IDs returned in this 
        set numIds [CkJsonObject_SizeOfArray $jsonResponse "ids"]
        puts "Page $pageNum, Number of Ids: $numIds"

        # Show the 1st 10 ids in this page.
        set i 0
        while {$i < $numIds} {
            CkJsonObject_put_I $jsonResponse $i
            puts "    $i: [CkJsonObject_stringOf $jsonResponse {ids[i]}]"

            set i [expr $i + 1]
            if {$i > 10} then {
                # Force the loop to exit.
                set i $numIds
            }

        }

        set pageNum [expr $pageNum + 1]
        if {$pageNum > 5} then {
            set bContinue 0
        }         else {
            CkStringBuilder_SetString $sbNextCursor [CkJsonObject_stringOf $jsonResponse "next_cursor_str"]
        }

    }

}

# 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
# 

delete_CkJsonObject $json
delete_CkRest $rest
delete_CkOAuth1 $oauth1
delete_CkJsonObject $jsonResponse
delete_CkStringBuilder $sbNextCursor

 

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