(Tcl) Lookup Google Drive Folder ID Given a Folder Path

Demonstrates how to find the Google Drive folder ID given a Folder Path.

This example demonstrates that we cannot simply query by folder name. (We can if every folder name is unique, but if not...) For example, imagine we have the following directory structure on Google Drive:

/AAWorkArea
/AAWorkArea/FolderA
/AAWorkArea/FolderB
/Folder2
/Folder2/FolderA

There are two directories named "FolderA". One is contained within AAWorkArea, and one is contained within "Folder2". To say it differently: One has the parent "AAWorkArea" and the other's parent is "Folder2".

To find the id of "/AAWorkArea/FolderA", we need to first find the id for "AAWorkArea", and then find the id for the folder with name="FolderA" and with AAWorkArea's id in FolderA's parents.

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

set json [new_CkJsonObject]

CkJsonObject_put_EmitCompact $json 0

# Get the AAWorkArea folder that is in the Google Drive root.
CkRest_AddQueryParam $rest "q" "'root' in parents and name='AAWorkArea'"
set jsonResponse [CkRest_fullRequestNoBody $rest "GET" "/drive/v3/files"]
if {[CkRest_get_LastMethodSuccess $rest] != 1} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkAuthGoogle $gAuth
    delete_CkRest $rest
    delete_CkJsonObject $json
    exit
}

CkJsonObject_Load $json $jsonResponse
puts [CkJsonObject_emit $json]
puts "name: [CkJsonObject_stringOf $json {files[0].name}]"
puts "id: [CkJsonObject_stringOf $json {files[0].id}]"
puts "mimeType: [CkJsonObject_stringOf $json {files[0].mimeType}]"
puts "-"

CkRest_ClearAllQueryParams $rest

# Now that we know the ID for the AAWorkarea directory, get the id for the FolderA having AAWorkArea as the parent.
set sbQuery [new_CkStringBuilder]

CkStringBuilder_Append $sbQuery "name = 'FolderA' and '"
CkStringBuilder_Append $sbQuery [CkJsonObject_stringOf $json "files[0].id"]
CkStringBuilder_Append $sbQuery "' in parents"
CkRest_AddQueryParamSb $rest "q" $sbQuery

set jsonResponse [CkRest_fullRequestNoBody $rest "GET" "/drive/v3/files"]
if {[CkRest_get_LastMethodSuccess $rest] != 1} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkAuthGoogle $gAuth
    delete_CkRest $rest
    delete_CkJsonObject $json
    delete_CkStringBuilder $sbQuery
    exit
}

CkJsonObject_Load $json $jsonResponse
puts [CkJsonObject_emit $json]
puts "name: [CkJsonObject_stringOf $json {files[0].name}]"
puts "id: [CkJsonObject_stringOf $json {files[0].id}]"
puts "mimeType: [CkJsonObject_stringOf $json {files[0].mimeType}]"
puts "-"

delete_CkAuthGoogle $gAuth
delete_CkRest $rest
delete_CkJsonObject $json
delete_CkStringBuilder $sbQuery