(Tcl) Iterate Pages in Feed

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

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load ./chilkat.dll

# 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
set oauth2 [new_CkOAuth2]

CkOAuth2_put_AccessToken $oauth2 "FACEBOOK-ACCESS-TOKEN"

set rest [new_CkRest]

# Connect to Facebook and send the following GET request:
set success [CkRest_Connect $rest "graph.facebook.com" 443 1 1]
if {$success != 1} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkOAuth2 $oauth2
    delete_CkRest $rest
    exit
}

# Provide the authentication credentials (i.e. the access key)
CkRest_SetAuthOAuth2 $rest $oauth2

# Gets the 1st page in the user's feed.
set responseJson [CkRest_fullRequestNoBody $rest "GET" "/v2.7/me/feed"]
if {[CkRest_get_LastMethodSuccess $rest] != 1} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkOAuth2 $oauth2
    delete_CkRest $rest
    exit
}

set json [new_CkJsonObject]

CkJsonObject_put_EmitCompact $json 0
CkJsonObject_Load $json $responseJson

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

set nextUrl [new_CkUrl]

# Get the URL for the next page in the feed.
set nextUrlStr [CkJsonObject_stringOf $json "paging.next"]
while {[CkJsonObject_get_LastMethodSuccess $json] == 1} {

    puts "Next page URL: $nextUrlStr"

    CkUrl_ParseUrl $nextUrl $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.
    CkRest_ClearAllQueryParams $rest
    CkRest_AddQueryParams $rest [CkUrl_query $nextUrl]

    set responseJson [CkRest_fullRequestNoBody $rest "GET" "/v2.7/me/feed"]
    if {[CkRest_get_LastMethodSuccess $rest] != 1} then {
        puts [CkRest_lastErrorText $rest]
        delete_CkOAuth2 $oauth2
        delete_CkRest $rest
        delete_CkJsonObject $json
        delete_CkUrl $nextUrl
        exit
    }

    CkJsonObject_Load $json $responseJson
    # See Parsing the Facebook User Feed for code showing how to parse the JSON feed content.

    # Get the URL for the next page.
    set nextUrlStr [CkJsonObject_stringOf $json "paging.next"]
}

puts "No more pages in the feed."

delete_CkOAuth2 $oauth2
delete_CkRest $rest
delete_CkJsonObject $json
delete_CkUrl $nextUrl