(Go) PayPal - Capture a Previously Authorized Payment

Captures a previously authorized payment.

Note: This example requires Chilkat v9.5.0.65 or greater.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

    // Note: Requires Chilkat v9.5.0.65 or greater.

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

    // Load our previously obtained access token. (see PayPal OAuth2 Access Token)
    jsonToken := chilkat.NewJsonObject()
    jsonToken.LoadFile("qa_data/tokens/paypal.json")

    // Build the Authorization request header field value.
    sbAuth := chilkat.NewStringBuilder()
    // token_type should be "Bearer"
    sbAuth.Append(*jsonToken.StringOf("token_type"))
    sbAuth.Append(" ")
    sbAuth.Append(*jsonToken.StringOf("access_token"))

    // Make the initial connection.
    // A single REST object, once connected, can be used for many PayPal REST API calls.
    // The auto-reconnect indicates that if the already-established HTTPS connection is closed,
    // then it will be automatically re-established as needed.
    rest := chilkat.NewRest()
    bAutoReconnect := true
    success := rest.Connect("api.sandbox.paypal.com",443,true,bAutoReconnect)
    if success != true {
        fmt.Println(rest.LastErrorText())
        jsonToken.DisposeJsonObject()
        sbAuth.DisposeStringBuilder()
        rest.DisposeRest()
        return
    }

    // ----------------------------------------------------------------------------------------------
    // The code above this comment could be placed inside a function/subroutine within the application
    // because the connection does not need to be made for every request.  Once the connection is made
    // the app may send many requests..
    // ----------------------------------------------------------------------------------------------

    // Build the JSON containing the transaction information.
    json := chilkat.NewJsonObject()
    json.SetEmitCompact(false)
    json.UpdateString("amount.currency","USD")
    json.UpdateString("amount.total","4.54")
    json.UpdateBool("is_final_capture",true)
    fmt.Println(*json.Emit())

    // The JSON created by the above code:

    // 	{ 
    // 	  "amount": { 
    // 	    "currency": "USD",
    // 	    "total": "4.54"
    // 	  },
    // 	  "is_final_capture": true
    // 	}

    rest.AddHeader("Authorization",*sbAuth.GetAsString())
    rest.AddHeader("Content-Type","application/json")

    // To capture payment, make a call to /v1/payments/authorization/[authorization_id]/capture with the authorization ID in the URI.
    // See PayPal Authorize Payment for sample code to create the authorization.
    // The "7X8332687A4929542" comes from the "transactions[0].related_resources[0].authorization.id" part of the authorization response.

    sbPath := chilkat.NewStringBuilder()
    sbPath.Append("/v1/payments/authorization/[authorization_id]/capture")
    numReplacements := sbPath.Replace("[authorization_id]","7X8332687A4929542")

    // Send the POST request containign the JSON in the request body, and get the JSON response.
    sbJsonRequest := chilkat.NewStringBuilder()
    json.SetEmitCompact(true)
    json.EmitSb(sbJsonRequest)
    sbJsonResponse := chilkat.NewStringBuilder()
    success = rest.FullRequestSb("POST",*sbPath.GetAsString(),sbJsonRequest,sbJsonResponse)
    if success != true {
        fmt.Println(rest.LastErrorText())
        jsonToken.DisposeJsonObject()
        sbAuth.DisposeStringBuilder()
        rest.DisposeRest()
        json.DisposeJsonObject()
        sbPath.DisposeStringBuilder()
        sbJsonRequest.DisposeStringBuilder()
        sbJsonResponse.DisposeStringBuilder()
        return
    }

    json.SetEmitCompact(false)
    json.LoadSb(sbJsonResponse)

    fmt.Println("Response Status Code = ", rest.ResponseStatusCode())

    // IMPORTANT: In most PayPal examples, the return status code is 201.
    // For this particular call, PayPal returns status code 200.

    // Did we get a 200 success response?
    if rest.ResponseStatusCode() != 200 {
        fmt.Println(*json.Emit())
        fmt.Println("Failed.")
        jsonToken.DisposeJsonObject()
        sbAuth.DisposeStringBuilder()
        rest.DisposeRest()
        json.DisposeJsonObject()
        sbPath.DisposeStringBuilder()
        sbJsonRequest.DisposeStringBuilder()
        sbJsonResponse.DisposeStringBuilder()
        return
    }

    // Sample JSON response is shown below.
    fmt.Println(*json.Emit())

    fmt.Println("success")

    // ------------------------------------------------
    // A sample JSON response:

    // 	{ 
    // 	  "id": "1LY5310469661362J",
    // 	  "create_time": "2016-11-24T00:40:50Z",
    // 	  "update_time": "2016-11-24T00:40:54Z",
    // 	  "amount": { 
    // 	    "total": "4.54",
    // 	    "currency": "USD"
    // 	  },
    // 	  "is_final_capture": true,
    // 	  "state": "completed",
    // 	  "reasonCode": "None",
    // 	  "parent_payment": "PAY-2CY489250W145633HLA3DK3Y",
    // 	  "transaction_fee": { 
    // 	    "value": "0.43",
    // 	    "currency": "USD"
    // 	  },
    // 	  "links": [
    // 	    { 
    // 	      "href": "https://api.sandbox.paypal.com/v1/payments/capture/1LY5310469661362J",
    // 	      "rel": "self",
    // 	      "method": "GET"
    // 	    },
    // 	    { 
    // 	      "href": "https://api.sandbox.paypal.com/v1/payments/capture/1LY5310469661362J/refund",
    // 	      "rel": "refund",
    // 	      "method": "POST"
    // 	    },
    // 	    { 
    // 	      "href": "https://api.sandbox.paypal.com/v1/payments/authorization/7X8332687A4929542",
    // 	      "rel": "authorization",
    // 	      "method": "GET"
    // 	    },
    // 	    { 
    // 	      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-2CY489250W145633HLA3DK3Y",
    // 	      "rel": "parent_payment",
    // 	      "method": "GET"
    // 	    }
    // 	  ]
    // 	

    jsonToken.DisposeJsonObject()
    sbAuth.DisposeStringBuilder()
    rest.DisposeRest()
    json.DisposeJsonObject()
    sbPath.DisposeStringBuilder()
    sbJsonRequest.DisposeStringBuilder()
    sbJsonResponse.DisposeStringBuilder()