Chilkat Examples

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PowerBuilder Web API Examples

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(PowerBuilder) Get Ebay OAuth2 Token using Client Credentials Grant Flow

See more eBay Examples

Demonstrates how to get a Ebay OAuth2 access token using the client credentials grant flow.

There are two ways of "minting" an OAuth2 access token.

  1. The authorization code grant flow (https://developer.ebay.com/api-docs/static/oauth-authorization-code-grant.html) This is where your app will be accessing another person's eBay account. It's an interactive process and requires the account owner's permission to get the access token the 1st time. After that, it can be refreshed indefinitely without user interaction.
  2. The client credentials grant flow (this example) (https://developer.ebay.com/api-docs/static/oauth-client-credentials-grant.html) This is where you access your own eBay account. It's non-interactive and you can do it in automated services where user-interaction is not possible.

For more information, see https://developer.ebay.com/api-docs/static/oauth-client-credentials-grant.html

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Http
integer li_Success
oleobject loo_Req
string ls_Scope
oleobject loo_Resp
oleobject loo_SbResponseBody
oleobject loo_JResp
integer li_RespStatusCode
string ls_Access_token
integer li_Expires_in
string ls_Token_type

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

loo_Http = create oleobject
li_rc = loo_Http.ConnectToNewObject("Chilkat_9_5_0.Http")
if li_rc < 0 then
    destroy loo_Http
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Implements the following CURL command:

// curl -X POST 'https://api.sandbox.ebay.com/identity/v1/oauth2/token' \
//   -H 'Content-Type: application/x-www-form-urlencoded' \
//   -H 'Authorization: Basic UkVTVFRlc3...wZi1hOGZhLTI4MmY=' \
//   -d 'grant_type=client_credentials&scope=https%3A%2F%2Fapi.ebay.com%2Foauth%2Fapi_scope'

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

loo_Req = create oleobject
li_rc = loo_Req.ConnectToNewObject("Chilkat_9_5_0.HttpRequest")

loo_Req.HttpVerb = "POST"
loo_Req.Path = "/identity/v1/oauth2/token"
loo_Req.ContentType = "application/x-www-form-urlencoded"
loo_Req.AddParam("grant_type","client_credentials")

// The scope query param indicates the access to be provided by the token.
// Multiple scopes can be specified by separating each with a SPACE char.
// See the Ebay OAuth scopes documentation

ls_Scope = "https://api.ebay.com/oauth/api_scope https://api.ebay.com/oauth/api_scope/buy.order.readonly https://api.ebay.com/oauth/api_scope/buy.guest.order https://api.ebay.com/oauth/api_scope/sell.marketing.readonly https://api.ebay.com/oauth/api_scope/sell.marketing https://api.ebay.com/oauth/api_scope/sell.inventory.readonly https://api.ebay.com/oauth/api_scope/sell.inventory https://api.ebay.com/oauth/api_scope/sell.account.readonly https://api.ebay.com/oauth/api_scope/sell.account https://api.ebay.com/oauth/api_scope/sell.fulfillment.readonly https://api.ebay.com/oauth/api_scope/sell.fulfillment https://api.ebay.com/oauth/api_scope/sell.analytics.readonly https://api.ebay.com/oauth/api_scope/sell.marketplace.insights.readonly https://api.ebay.com/oauth/api_scope/commerce.catalog.readonly https://api.ebay.com/oauth/api_scope/buy.shopping.cart https://api.ebay.com/oauth/api_scope/buy.offer.auction"

loo_Req.AddParam("scope",ls_Scope)

// Setting these properties causes the Authorization: Basic UkVTVFRlc3...wZi1hOGZhLTI4MmY=
// header to be added.
loo_Http.Login = "EBAY_CLIENT_ID"
loo_Http.Password = "EBAY_CLIENT_SECRET"
loo_Http.BasicAuth = 1

loo_Resp = loo_Http.PostUrlEncoded("https://api.sandbox.ebay.com/identity/v1/oauth2/token",loo_Req)
if loo_Http.LastMethodSuccess = 0 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Http
    destroy loo_Req
    return
end if

loo_SbResponseBody = create oleobject
li_rc = loo_SbResponseBody.ConnectToNewObject("Chilkat_9_5_0.StringBuilder")

loo_Resp.GetBodySb(loo_SbResponseBody)
loo_JResp = create oleobject
li_rc = loo_JResp.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

loo_JResp.LoadSb(loo_SbResponseBody)
loo_JResp.EmitCompact = 0

Write-Debug "Response Body:"
Write-Debug loo_JResp.Emit()

li_RespStatusCode = loo_Resp.StatusCode
Write-Debug "Response Status Code = " + string(li_RespStatusCode)
if li_RespStatusCode >= 400 then
    Write-Debug "Response Header:"
    Write-Debug loo_Resp.Header
    Write-Debug "Failed."
    destroy loo_Resp
    destroy loo_Http
    destroy loo_Req
    destroy loo_SbResponseBody
    destroy loo_JResp
    return
end if

destroy loo_Resp

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

// {
//   "access_token": "v^1.1#i^1#p^1#r^0#I^3#f^0#t^H4s ... wu67e3xAhskz4DAAA",
//   "expires_in": 7200,
//   "token_type": "Application Access Token"
// }

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

ls_Access_token = loo_JResp.StringOf("access_token")
li_Expires_in = loo_JResp.IntOf("expires_in")
ls_Token_type = loo_JResp.StringOf("token_type")


destroy loo_Http
destroy loo_Req
destroy loo_SbResponseBody
destroy loo_JResp

 

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