(MFC) PayPal - Execute Approved PayPal Payment

Executes an approved PayPal payment. (This is for executing an approved PayPal payment, not a credit card payment.)

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

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkJsonObject.h>
#include <CkStringBuilder.h>
#include <CkRest.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    // Build the Authorization request header field value.
    CkStringBuilder sbAuth;
    // 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.
    CkRest rest;
    bool bAutoReconnect = true;
    bool success = rest.Connect("api.sandbox.paypal.com",443,true,bAutoReconnect);
    if (success != true) {
        strOut.append(rest.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        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 payer_id
    CkJsonObject json;
    json.put_EmitCompact(false);
    json.AppendString("payer_id","RRCYJUTFJGZTA");
    strOut.append(json.emit());
    strOut.append("\r\n");

    // The JSON created by the above code:

    // 	{ 
    // 	  "payer_id": "RRCYJUTFJGZTA"
    // 	}

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

    // The payment ID is passed in the path.
    CkStringBuilder sbPath;
    sbPath.Append("/v1/payments/payment/payment_id/execute");
    int numReplaced = sbPath.Replace("payment_id","PAY-4N746561P0587231SKQQK6MY");

    // Send the POST request containign the JSON in the request body, and get the JSON response.
    CkStringBuilder sbJsonRequest;
    json.put_EmitCompact(true);
    json.EmitSb(sbJsonRequest);
    CkStringBuilder sbJsonResponse;
    success = rest.FullRequestSb("POST",sbPath.getAsString(),sbJsonRequest,sbJsonResponse);
    if (success != true) {
        strOut.append(rest.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

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

    strOut.append("Response Status Code = ");
    strOut.appendInt(rest.get_ResponseStatusCode());
    strOut.append("\r\n");

    // Did we get a 200 success response?
    if (rest.get_ResponseStatusCode() != 200) {
        strOut.append(json.emit());
        strOut.append("\r\n");
        strOut.append("Failed.");
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Sample JSON response is shown below.
    strOut.append(json.emit());
    strOut.append("\r\n");

    strOut.append("success");
    strOut.append("\r\n");

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

    // 	{ 
    // 	  "id": "PAY-4N746561P0587231SKQQK6MY",
    // 	  "create_time": "2014-09-22T23:22:27Z",
    // 	  "update_time": "2014-09-22T23:31:13Z",
    // 	  "state": "approved",
    // 	  "intent": "sale",
    // 	  "payer": { 
    // 	    "payment_method": "paypal",
    // 	    "payer_info": { 
    // 	      "email": "npurayil-uspr-60@paypal.com",
    // 	      "first_name": "Brian",
    // 	      "last_name": "Robinson",
    // 	      "payer_id": "JMKDKJ4D7DG7G",
    // 	      "shipping_address": { 
    // 	        "line1": "4thFloor",
    // 	        "line2": "unit#34",
    // 	        "city": "SAn Jose",
    // 	        "state": "CA",
    // 	        "postal_code": "95131",
    // 	        "country_code": "US",
    // 	        "phone": "011862212345678",
    // 	        "recipient_name": "HelloWorld"
    // 	      }
    // 	    }
    // 	  },
    // 	  "transactions": [
    // 	    { 
    // 	      "amount": { 
    // 	        "total": "30.11",
    // 	        "currency": "USD",
    // 	        "details": { 
    // 	          "subtotal": "30.00",
    // 	          "tax": "0.07",
    // 	          "shipping": "0.03",
    // 	          "handling_fee": "1.00",
    // 	          "insurance": "0.01",
    // 	          "shipping_discount": "-1.00"
    // 	        }
    // 	      },
    // 	      "description": "This is the payment transaction description.",
    // 	      "item_list": { 
    // 	        "items": [
    // 	          { 
    // 	            "name": "hat",
    // 	            "sku": "1",
    // 	            "price": "3.00",
    // 	            "currency": "USD",
    // 	            "quantity": "5",
    // 	            "description": "Brown color hat",
    // 	            "tax": "0.01"
    // 	          },
    // 	          { 
    // 	            "name": "handbag",
    // 	            "sku": "product34",
    // 	            "price": "15.00",
    // 	            "currency": "USD",
    // 	            "quantity": "1",
    // 	            "description": "Black color handbag",
    // 	            "tax": "0.02"
    // 	          }
    // 	        ],
    // 	        "shipping_address": { 
    // 	          "recipient_name": "HelloWorld",
    // 	          "line1": "4thFloor",
    // 	          "line2": "unit#34",
    // 	          "city": "SAn Jose",
    // 	          "state": "CA",
    // 	          "phone": "011862212345678",
    // 	          "postal_code": "95131",
    // 	          "country_code": "US"
    // 	        }
    // 	      },
    // 	      "related_resources": [
    // 	        { 
    // 	          "sale": { 
    // 	            "id": "4XP56210M0797192Y",
    // 	            "create_time": "2014-09-22T23:22:27Z",
    // 	            "update_time": "2014-09-22T23:31:13Z",
    // 	            "amount": { 
    // 	              "total": "30.11",
    // 	              "currency": "USD"
    // 	            },
    // 	            "payment_mode": "INSTANT_TRANSFER",
    // 	            "state": "completed",
    // 	            "protection_eligibility": "ELIGIBLE",
    // 	            "protection_eligibility_type": "ITEM_NOT_RECEIVED_ELIGIBLE",
    // 	            "transaction_fee": { 
    // 	              "value": "1.75",
    // 	              "currency": "USD"
    // 	            },
    // 	            "parent_payment": "PAY-4N746561P0587231SKQQK6MY",
    // 	            "links": [
    // 	              { 
    // 	                "href": "https://api.paypal.com/v1/payments/sale/4XP56210M0797192Y",
    // 	                "rel": "self",
    // 	                "method": "GET"
    // 	              },
    // 	              { 
    // 	                "href": "https://api.paypal.com/v1/payments/sale/4XP56210M0797192Y/refund",
    // 	                "rel": "refund",
    // 	                "method": "POST"
    // 	              },
    // 	              { 
    // 	                "href": "https://api.paypal.com/v1/payments/payment/PAY-4N746561P0587231SKQQK6MY",
    // 	                "rel": "parent_payment",
    // 	                "method": "GET"
    // 	              }
    // 	            ]
    // 	          }
    // 	        }
    // 	      ]
    // 	    }
    // 	  ],
    // 	  "links": [
    // 	    { 
    // 	      "href": "https://api.paypal.com/v1/payments/payment/PAY-4N746561P0587231SKQQK6MY",
    // 	      "rel": "self",
    // 	      "method": "GET"
    // 	    }
    // 	  ]
    // 	}


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }