(Tcl) Calendar: Refresh Expired OAuth2 Access Token

Refreshes an expired OAuth2 access token.

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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.

set json [new_CkJsonObject]

set success [CkJsonObject_LoadFile $json "qa_data/tokens/msGraphCalendar.json"]
if {$success != 1} then {
    delete_CkJsonObject $json
    exit
}

set req [new_CkHttpRequest]

CkHttpRequest_AddParam $req "grant_type" "refresh_token"
CkHttpRequest_AddParam $req "redirect_uri" "http://localhost:3017/"
CkHttpRequest_AddParam $req "client_id" "MICROSOFT-GRAPH-CLIENT-ID"
CkHttpRequest_AddParam $req "client_secret" "MICROSOFT-GRAPH-CLIENT-SECRET"
CkHttpRequest_AddParam $req "refresh_token" [CkJsonObject_stringOf $json "refresh_token"]
CkHttpRequest_AddParam $req "scope" "openid profile offline_access user.readwrite calendars.readwrite files.readwrite"

set http [new_CkHttp]

# resp is a CkHttpResponse
set resp [CkHttp_PostUrlEncoded $http "https://login.microsoftonline.com/common/oauth2/v2.0/token" $req]
if {[CkHttp_get_LastMethodSuccess $http] != 1} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkJsonObject $json
    delete_CkHttpRequest $req
    delete_CkHttp $http
    exit
}

# Load the JSON response.
CkJsonObject_Load $json [CkHttpResponse_bodyStr $resp]
CkJsonObject_put_EmitCompact $json 0

# Show the JSON response.
puts [CkJsonObject_emit $json]

puts "Response status code: [CkHttpResponse_get_StatusCode $resp]"

# If the response status code is not 200, then it's an error.
if {[CkHttpResponse_get_StatusCode $resp] != 200} then {
    delete_CkJsonObject $json
    delete_CkHttpRequest $req
    delete_CkHttp $http
    exit
}

delete_CkHttpResponse $resp

# Save the refreshed access token JSON to a file for future requests.
set fac [new_CkFileAccess]

CkFileAccess_WriteEntireTextFile $fac "qa_data/tokens/msGraphCalendar.json" [CkJsonObject_emit $json] "utf-8" 0

puts "Success."

delete_CkJsonObject $json
delete_CkHttpRequest $req
delete_CkHttp $http
delete_CkFileAccess $fac