(Tcl) Walmart v3 OAuth2 Access Token with Client Credentials

Get access token by providing Client ID and Client Secret.

For more information, see https://developer.walmart.com/#/apicenter/marketPlace/latest#apiAuthentication

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load ./chilkat.dll

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

set http [new_CkHttp]

# Implements the following CURL command:

# curl -X POST https://marketplace.walmartapis.com/v3/token \
# --user clientId:clientSecret \
# -H 'Content-Type: application/x-www-form-urlencoded' \
# -H 'Accept: application/json' \
# -H 'WM_SVC.NAME: Walmart Marketplace' \
# -H 'WM_QOS.CORRELATION_ID: b3261d2d-028a-4ef7-8602-633c23200af6' \
# -H 'WM_SVC.VERSION: 1.0.0' \
# -d 'grant_type=client_credentials'

set req [new_CkHttpRequest]

CkHttpRequest_put_HttpVerb $req "POST"
CkHttpRequest_put_Path $req "/v3/token"
CkHttpRequest_put_ContentType $req "application/x-www-form-urlencoded"
CkHttpRequest_AddParam $req "grant_type" "client_credentials"

CkHttpRequest_AddHeader $req "WM_QOS.CORRELATION_ID" "b3261d2d-028a-4ef7-8602-633c23200af6"
CkHttpRequest_AddHeader $req "Accept" "application/json"
CkHttpRequest_AddHeader $req "WM_SVC.NAME" "Walmart Marketplace"
CkHttpRequest_AddHeader $req "WM_SVC.VERSION" "1.0.0"

# Set the "--user clientId:clientSecret" by setting the Login and Password properties
CkHttp_put_Login $http "clientId"
CkHttp_put_Password $http "clientSecret"

# resp is a CkHttpResponse
set resp [CkHttp_PostUrlEncoded $http "https://marketplace.walmartapis.com/v3/token" $req]
if {[CkHttp_get_LastMethodSuccess $http] == 0} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkHttp $http
    delete_CkHttpRequest $req
    exit
}

set sbResponseBody [new_CkStringBuilder]

CkHttpResponse_GetBodySb $resp $sbResponseBody
set jResp [new_CkJsonObject]

CkJsonObject_LoadSb $jResp $sbResponseBody
CkJsonObject_put_EmitCompact $jResp 0

puts "Response Body:"
puts [CkJsonObject_emit $jResp]

set respStatusCode [CkHttpResponse_get_StatusCode $resp]
puts "Response Status Code = $respStatusCode"
if {$respStatusCode >= 400} then {
    puts "Response Header:"
    puts [CkHttpResponse_header $resp]
    puts "Failed."
    delete_CkHttpResponse $resp

    delete_CkHttp $http
    delete_CkHttpRequest $req
    delete_CkStringBuilder $sbResponseBody
    delete_CkJsonObject $jResp
    exit
}

delete_CkHttpResponse $resp

# Sample JSON response:
# (Sample code for parsing the JSON response is shown below)

# {
#   "access_token": "eyJraWQiOiIzN2JmOWQ5MS04ZDRkLTQwYjEtODU4NS1mNzhlZDc3MjM4MDQiLCJlbmMiOiJBMjU2R0NNIiwiYWxnIjoiZGlyIn0..bKkYKqJ5CP0Qb2Qz.wQ4TTa2nwL1rbT98BBdbTi_MRNMM0gW_5q8im6uX4olRwYiuOXjaG6TbnnFOK5fT0UzMEJUf-uybalogMH78cHP0ZyL6hONKJOMJ8VK3ThcZ4AUcqrMRBNIMFiAWSTvHJg1y5g-t-WwmZbaD589dMll7-aXG6PPncpeQA1zOyOTaELjDA4O4jimc2_7PnEdc6ETv89AKcnw1J1cPz6BPG9jpyLVX_zEZcQnxbAHYZiSFscFCzdMtpFDrPWIwWuRcV5qRlH4DghHMqKG7V2wqX1VYV_gUvLH5b2y8O6Y0u9nmkBpqTGNiMpWzNE7amFyqKExGk4Jc_ziJdsrj38cSz9a4KtZOrV6E3mN5gFFEQSNAGzrdEv2IdTfWdNgTnHopQecgrlP7EcsrmGh1ARGTWr-e7RaiL8m2Sx5i9odGj5FDJKXiDeohX-KEB-Vc2KJeLxvYAHA7nPT1_pkZDBCfpqq_6GAUBDEbDZ6mJH93TAE1YhFeR_jcdl_23lND9sHKlvHA97-fHAjEVTqu-4wVmFFelGyJD4VIBkieWn94jq_opMiz-RjyYn8Vj-tfdJy8azBNt5NkjjW7Rsque04LsfujrqHDcJHio3ukT5JKwxNv9PoHMxoHnQ5fUdF4pOzt6ZShkki-jSbhileDlClh0ufLSNYgBmy6Fz4wTZWgL-DhJOcv-7Cup95Rx35Wh7XDYTbdz_z_avtfF-f-JS5XyN20Hn-gioWdNA7DNhI1O6s7zKZ2s2iD9eFkprOLGtcJzvNVjrxKZKD6R0hrUUzDXRn95oWlJXfan-OsTNdRypfGWFqIes-n8cBhzVF69LEWIDMr6YfdkRkmCq_p_A.Bvyf-k_rnsiiuf0jGGVXvw",
#   "token_type": "Bearer",
#   "expires_in": 900
# }

# Sample code for parsing the JSON response...
# Use the following online tool to generate parsing code from sample JSON:
# Generate Parsing Code from JSON

set access_token [CkJsonObject_stringOf $jResp "access_token"]
set token_type [CkJsonObject_stringOf $jResp "token_type"]
set expires_in [CkJsonObject_IntOf $jResp "expires_in"]

delete_CkHttp $http
delete_CkHttpRequest $req
delete_CkStringBuilder $sbResponseBody
delete_CkJsonObject $jResp