(Tcl) List all Pages of Files in Google Drive

Demonstrates how iterate over pages to list files in Google Drive.

See Google Drive Files list for more optional HTTP parameters.

Chilkat Tcl Extension Downloads Chilkat Tcl Extension Downloads

load ./chilkat.dll

set success 1

# It requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# This example uses a previously obtained access token having permission for the 
# Google Drive scope.

set gAuth [new_CkAuthGoogle]

CkAuthGoogle_put_AccessToken $gAuth "GOOGLE-DRIVE-ACCESS-TOKEN"

set rest [new_CkRest]

# Connect using TLS.
set bAutoReconnect 1
set success [CkRest_Connect $rest "www.googleapis.com" 443 1 $bAutoReconnect]

# Provide the authentication credentials (i.e. the access token)
CkRest_SetAuthGoogle $rest $gAuth

# Get 5 results per page for testing.  (The default page size is 100, with a max of 1000.
CkRest_AddQueryParam $rest "pageSize" "5"

set json [new_CkJsonObject]

# Send the request for the 1st page.
set jsonResponse [CkRest_fullRequestNoBody $rest "GET" "/drive/v3/files"]

set pageNumber 1

set bContinueLoop [expr [CkRest_get_LastMethodSuccess $rest]  &&  [[CkRest_get_ResponseStatusCode $rest] == 200]]

while {$bContinueLoop == 1} {

    puts "---- Page $pageNumber ----"

    # Iterate over each file in the response and show the name, id, and mimeType.
    CkJsonObject_Load $json $jsonResponse

    # See the sample JSON response at the bottom of this example.
    set numFiles [CkJsonObject_SizeOfArray $json "files"]
    set i 0
    while {$i < $numFiles} {
        CkJsonObject_put_I $json $i
        puts "name: [CkJsonObject_stringOf $json {files[i].name}]"
        puts "id: [CkJsonObject_stringOf $json {files[i].id}]"
        puts "mimeType: [CkJsonObject_stringOf $json {files[i].mimeType}]"
        puts "-"
        set i [expr $i + 1]
    }

    # Get the next page of files.
    # If the "nextPageToken" is present in the JSON response, then use it in the "pageToken" parameter
    # for the next request.   If no "nextPageToken" was present, then this was the last page of files.
    set pageToken [CkJsonObject_stringOf $json "nextPageToken"]
    set bContinueLoop 0
    set bHasMorePages [CkJsonObject_get_LastMethodSuccess $json]
    if {$bHasMorePages == 1} then {
        CkRest_ClearAllQueryParams $rest
        CkRest_AddQueryParam $rest "pageSize" "5"
        CkRest_AddQueryParam $rest "pageToken" $pageToken
        set jsonResponse [CkRest_fullRequestNoBody $rest "GET" "/drive/v3/files"]
        set bContinueLoop [expr [CkRest_get_LastMethodSuccess $rest]  &&  [[CkRest_get_ResponseStatusCode $rest] == 200]]
        set pageNumber [expr $pageNumber + 1]
    }

}

if {[CkRest_get_LastMethodSuccess $rest] != 1} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkAuthGoogle $gAuth
    delete_CkRest $rest
    delete_CkJsonObject $json
    exit
}

# A successful response will have a status code equal to 200.
if {[CkRest_get_ResponseStatusCode $rest] != 200} then {
    puts "response status code = [CkRest_get_ResponseStatusCode $rest]"
    puts "response status text = [CkRest_responseStatusText $rest]"
    puts "response header: [CkRest_responseHeader $rest]"
    puts "response JSON: $jsonResponse"
    delete_CkAuthGoogle $gAuth
    delete_CkRest $rest
    delete_CkJsonObject $json
    exit
}

# A successful JSON response looks like this:
# {
#  "kind": "drive#fileList",
#  "files": [
#    {
#      "kind": "drive#file",
#      "id": "0B53Q6OSTWYolenpjTEU4ekJlQUU",
#      "name": "test",
#      "mimeType": "application/vnd.google-apps.folder"
#    },
#    {
#      "kind": "drive#file",
#      "id": "0B53Q6OSTWYolRm4ycjZtdXhRaEE",
#      "name": "starfish4.jpg",
#      "mimeType": "image/jpeg"
#    },
#    {
#      "kind": "drive#file",
#      "id": "0B53Q6OSTWYolMWt2VzN0Qlo1UjA",
#      "name": "hamlet2.xml",
#      "mimeType": "text/xml"
#    },
# ...
#    {
#      "kind": "drive#file",
#      "id": "0B53Q6OSTWYolc3RhcnRlcl9maWxlX2Rhc2hlclYw",
#      "name": "Getting started",
#      "mimeType": "application/pdf"
#    }
#  ]
# }

delete_CkAuthGoogle $gAuth
delete_CkRest $rest
delete_CkJsonObject $json