Tcl

Microsoft Graph -- List Users (Automatic OAuth2 Client Credentials)

See more Microsoft Graph Examples

Simplify OAuth2 client credentials by using Chilkat to automatically obtain the necessary access token. This example demonstrates the technique with the Microsoft Graph API's "List Users" request. Tcl

load ./chilkat.dll

set success 0

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

# Instead of directly sending a POST request to obtain an OAuth2 access token, 
# you can provide Chilkat with the necessary information to automatically fetch 
# the token using the Client Credentials flow. During the first HTTP request, 
# Chilkat will obtain the token if it doesn't have one yet, and then use it for 
# all subsequent requests. When the token is expired or about to expire, Chilkat 
# will automatically obtain a new one, eliminating the need for your application 
# to manage token expiration and renewal manually. This approach also reduces the 
# number of HTTP requests by utilizing valid tokens as long as possible.

set json [new_CkJsonObject]

CkJsonObject_UpdateString $json "client_secret" "CLIENT_SECRET"
CkJsonObject_UpdateString $json "client_id" "CLIENT_ID"
CkJsonObject_UpdateString $json "token_endpoint" "https://login.microsoftonline.com/TENANT_ID/oauth2/v2.0/token"
CkJsonObject_UpdateString $json "scope" "https://graph.microsoft.com/.default"

set http [new_CkHttp]

# Provide the information to let Chilkat automatically obtain the access token.
CkHttp_put_AuthToken $http [CkJsonObject_emit $json]

set sbResponse [new_CkStringBuilder]

set success [CkHttp_QuickGetSb $http "https://graph.microsoft.com/v1.0/users" $sbResponse]
if {$success != 1} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkJsonObject $json
    delete_CkHttp $http
    delete_CkStringBuilder $sbResponse
    exit
}

CkJsonObject_LoadSb $json $sbResponse
CkJsonObject_put_EmitCompact $json 0

puts "Status code = [CkHttp_get_LastStatus $http]"
if {[CkHttp_get_LastStatus $http] != 200} then {
    puts [CkJsonObject_emit $json]
    puts "Failed."
}

puts [CkJsonObject_emit $json]

# Sample output
# {
#   "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users",
#   "value": [
#     {
#       "@odata.id": "https://graph.microsoft.com/v2/6d8ddd66-68d1-43b0-af5c-e31b4b7dd5cd/directoryObjects/fca490d8-5918-4201-8079-c5dcbeafcdc9/Microsoft.DirectoryServices.User",
#       "businessPhones": [
#       ],
#       "displayName": "Joe Sample",
#       "givenName": "Joe",
#       "jobTitle": null,
#       "mail": null,
#       "mobilePhone": null,
#       "officeLocation": null,
#       "preferredLanguage": null,
#       "surname": "Sample",
#       "userPrincipalName": "admin_chilkatsoft.com#EXT#@adminchilkatsoft.onmicrosoft.com",
#       "id": "fca490d8-5918-4201-8079-c5dcbeafcdc9"
#     }
#   ]
# }

# Use this online tool to generate parsing code from sample JSON: 
# Generate Parsing Code from JSON

set odata_context [CkJsonObject_stringOf $json "\"@odata.context\""]
set i 0
set count_i [CkJsonObject_SizeOfArray $json "value"]
while {$i < $count_i} {
    CkJsonObject_put_I $json $i
    set odata_id [CkJsonObject_stringOf $json "value[i].\"@odata.id\""]
    set displayName [CkJsonObject_stringOf $json "value[i].displayName"]
    set givenName [CkJsonObject_stringOf $json "value[i].givenName"]
    set jobTitle [CkJsonObject_stringOf $json "value[i].jobTitle"]
    set mail [CkJsonObject_stringOf $json "value[i].mail"]
    set mobilePhone [CkJsonObject_stringOf $json "value[i].mobilePhone"]
    set officeLocation [CkJsonObject_stringOf $json "value[i].officeLocation"]
    set preferredLanguage [CkJsonObject_stringOf $json "value[i].preferredLanguage"]
    set surname [CkJsonObject_stringOf $json "value[i].surname"]
    set userPrincipalName [CkJsonObject_stringOf $json "value[i].userPrincipalName"]
    set id [CkJsonObject_stringOf $json "value[i].id"]
    set j 0
    set count_j [CkJsonObject_SizeOfArray $json "value[i].businessPhones"]
    while {$j < $count_j} {
        CkJsonObject_put_J $json $j
        set j [expr $j + 1]
    }
    set i [expr $i + 1]
}

delete_CkJsonObject $json
delete_CkHttp $http
delete_CkStringBuilder $sbResponse