Unicode C++

PayPal - Create a PayPal Payment

See more PayPal Examples

Creates a payment to be paid from a PayPal account (as opposed to being funded by a credit card).

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

Unicode C++

#include <CkJsonObjectW.h>
#include <CkStringBuilderW.h>
#include <CkRestW.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  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)
    CkJsonObjectW jsonToken;
    jsonToken.LoadFile(L"qa_data/tokens/paypal.json");

    //  Build the Authorization request header field value.
    CkStringBuilderW sbAuth;
    //  token_type should be "Bearer"
    sbAuth.Append(jsonToken.stringOf(L"token_type"));
    sbAuth.Append(L" ");
    sbAuth.Append(jsonToken.stringOf(L"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.
    CkRestW rest;
    bool bAutoReconnect = true;
    success = rest.Connect(L"api.sandbox.paypal.com",443,true,bAutoReconnect);
    if (success != true) {
        wprintf(L"%s\n",rest.lastErrorText());
        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.
    CkJsonObjectW json;
    json.put_EmitCompact(false);
    json.UpdateString(L"intent",L"sale");
    json.UpdateString(L"redirect_urls.return_url",L"http://www.example.com/return_url");
    json.UpdateString(L"redirect_urls.cancel_url",L"http://www.example.com/cancel_url");
    json.UpdateString(L"payer.payment_method",L"paypal");
    json.UpdateString(L"transactions[0].amount.total",L"7.47");
    json.UpdateString(L"transactions[0].amount.currency",L"USD");
    json.UpdateString(L"transactions[0].description",L"This is the payment transaction description.");

    wprintf(L"%s\n",json.emit());

    //  The JSON created by the above code is this:

    //  	{ 
    //  	  "intent": "sale",
    //  	  "redirect_urls": { 
    //  	    "return_url": "http://www.example.com/return_url",
    //  	    "cancel_url": "http://www.example.com/cancel_url"
    //  	  },
    //  	  "payer": { 
    //  	    "payment_method": "paypal"
    //  	  },
    //  	  "transactions": [
    //  	    { 
    //  	      "amount": { 
    //  	        "total": "7.47",
    //  	        "currency": "USD"
    //  	      },
    //  	      "description": "This is the payment transaction description."
    //  	    }
    //  	  ]
    //  	}

    rest.AddHeader(L"Authorization",sbAuth.getAsString());
    rest.AddHeader(L"Content-Type",L"application/json");

    //  Send the POST request containign the JSON in the request body, and get the JSON response.
    CkStringBuilderW sbJsonRequest;
    json.put_EmitCompact(true);
    json.EmitSb(sbJsonRequest);
    CkStringBuilderW sbJsonResponse;
    success = rest.FullRequestSb(L"POST",L"/v1/payments/payment",sbJsonRequest,sbJsonResponse);
    if (success != true) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    json.put_EmitCompact(false);
    json.LoadSb(sbJsonResponse);

    wprintf(L"Response Status Code = %d\n",rest.get_ResponseStatusCode());

    //  Did we get a 201 success response?
    if (rest.get_ResponseStatusCode() != 201) {
        wprintf(L"%s\n",json.emit());
        wprintf(L"Failed.\n");
        return;
    }

    //  Sample JSON response is shown below.
    wprintf(L"%s\n",json.emit());
    wprintf(L"success\n");

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

    //  	{ 
    //  	  "id": "PAY-1XK50350XV338620BLA3CZGI",
    //  	  "intent": "sale",
    //  	  "state": "created",
    //  	  "payer": { 
    //  	    "payment_method": "paypal",
    //  	    "use_vendor_currency_conversion": false
    //  	  },
    //  	  "transactions": [
    //  	    { 
    //  	      "amount": { 
    //  	        "total": "7.47",
    //  	        "currency": "USD"
    //  	      },
    //  	      "description": "This is the payment transaction description.",
    //  	      "related_resources": [
    //  	      ]
    //  	    }
    //  	  ],
    //  	  "create_time": "2016-11-23T23:56:09Z",
    //  	  "links": [
    //  	    { 
    //  	      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-1XK50350XV338620BLA3CZGI",
    //  	      "rel": "self",
    //  	      "method": "GET"
    //  	    },
    //  	    { 
    //  	      "href": "https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=EC-0BG932459F977083J",
    //  	      "rel": "approval_url",
    //  	      "method": "REDIRECT"
    //  	    },
    //  	    { 
    //  	      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-1XK50350XV338620BLA3CZGI/execute",
    //  	      "rel": "execute",
    //  	      "method": "POST"
    //  	    }
    //  	  ]
    //  	}
    }