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USPS OAuth2 Client Credentials

See more OAuth2 Examples

Get an OAuth2 access token for the United States Postal Service (USPS) REST API.

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Local $bSuccess = False

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

$oHttp = ObjCreate("Chilkat.Http")

; Implements the following CURL command:

; curl -X POST https://apis.usps.com/oauth2/v3/token \
;   -H "Content-Type: application/x-www-form-urlencoded" \
;   -d "grant_type=client_credentials" \
;   -d "client_id=123456789" \
;   -d "client_secret=A1B2C3D4E5" \
;   -d "scope=ResourceA+ResourceB+ResourceC"

; Use the following online tool to generate HTTP code from a CURL command
; Convert a cURL Command to HTTP Source Code

$oReq = ObjCreate("Chilkat.HttpRequest")
$oReq.AddParam "grant_type","client_credentials"
$oReq.AddParam "client_id","123456789"
$oReq.AddParam "client_secret","A1B2C3D4E5"
$oReq.AddParam "scope","ResourceA+ResourceB+ResourceC"

$oReq.HttpVerb = "POST"
$oReq.ContentType = "application/x-www-form-urlencoded"

$oResp = ObjCreate("Chilkat.HttpResponse")
$bSuccess = $oHttp.HttpReq("https://apis.usps.com/oauth2/v3/token",$oReq,$oResp)
If ($bSuccess = False) Then
    ConsoleWrite($oHttp.LastErrorText & @CRLF)
    Exit
EndIf

$oSbResponseBody = ObjCreate("Chilkat.StringBuilder")
$oResp.GetBodySb($oSbResponseBody)

$oJResp = ObjCreate("Chilkat.JsonObject")
$oJResp.LoadSb($oSbResponseBody)
$oJResp.EmitCompact = False

ConsoleWrite("Response Body:" & @CRLF)
ConsoleWrite($oJResp.Emit() & @CRLF)

Local $iRespStatusCode = $oResp.StatusCode
ConsoleWrite("Response Status Code = " & $iRespStatusCode & @CRLF)
If ($iRespStatusCode >= 400) Then
    ConsoleWrite("Response Header:" & @CRLF)
    ConsoleWrite($oResp.Header & @CRLF)
    ConsoleWrite("Failed." & @CRLF)
    Exit
EndIf

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

; {
;   "access_token": "eyJraWQiOiIxMDEwMTAiLCJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9.eyJzdWIiOiIiLCJhdWQiOiJhZGRyZXNzZXMgaW50ZXJuYXRpb25hbC1wcmljZXMgc3Vic2NyaXB0aW9ucyBwYXltZW50cyBwaWNrdXAgdHJhY2tpbmcgbGFiZWxzIHNjYW4tZm9ybXMgY29tcGFuaWVzIHNlcnZpY2UtZGVsaXZlcnktc3RhbmRhcmRzIGxvY2F0aW9ucyBpbnRlcm5hdGlvbmFsLWxhYmVscyBwcmljZXMiLCJhenAiOiJoeXI3YjN2Q1J0cFl0QUhNMWE4Y2RVcmt5eUZtTmtiZyIsIm9yZ2FuaXphdGlvbl9pZCI6IjAiLCJpc3MiOiJ1cm46XC9cL2FwaS51c3BzLmNvbSIsImV4cCI6MTY4MDkxNzc4NiwiaWF0IjoxNjgwODg4OTg2LCJqdGkiOiI3YjU5MzJlMS05NjIxLTQzZDAtYTMyNy0xMzIxYWVjNzJjZGYifQ.QzrUxlT2rG4jvYbMDGnk23j8ZYfHJcdXPKR9CbSmcKeVpURaHhEMpPB6K4x5ut3xxeEGSzeE5VRz8vixI4iqyHsD8rSdkLTPHy0iovUHOZQBAJVQ6hii9jpLhxUXmiTtH3jKzSj_f2fuNmZbIGhf-CR2FBeWF-aBPzEDEMV95nkCUMfW_Z2BmkbraSfvQZxkCO-cLrMAwlYcrzUtaJ7vnazeQB4sep5BBHBEvsa4kfq6_tz6BAKgv3R7cI2NkSv-wgy_IGoTjVCMTS8mJHGs_t8cWCO8-z4lxW1tUwIBKOCUDpmEEnGgiG6Sl0C_gGl4bZ5cDSl4IgPpcOVi9jZ7LA",
;   "token_type": "Bearer",
;   "issued_at": 1680888985929,
;   "expires_in": 28799,
;   "status": "approved",
;   "scope": "addresses international-prices subscriptions payments pickup tracking labels scan-forms companies service-delivery-standards locations international-labels prices",
;   "issuer": "api.usps.com",
;   "client_id": "hyr7b3vCRtpYtAHM1a8cdUrkyyFmNkbg",
;   "application_name": "Silver Shipper Developer",
;   "api_products": "[Shipping-Silver]",
;   "public_key": "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"
; }

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

Local $sAccess_token = $oJResp.StringOf("access_token")
Local $sToken_type = $oJResp.StringOf("token_type")
Local $issued_at = $oJResp.IntOf("issued_at")
Local $iExpires_in = $oJResp.IntOf("expires_in")
Local $status = $oJResp.StringOf("status")
Local $scope = $oJResp.StringOf("scope")
Local $sIssuer = $oJResp.StringOf("issuer")
Local $sClient_id = $oJResp.StringOf("client_id")
Local $sApplication_name = $oJResp.StringOf("application_name")
Local $sApi_products = $oJResp.StringOf("api_products")
Local $sPublic_key = $oJResp.StringOf("public_key")