Chilkat Examples

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MFC Web API Examples

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(MFC) PayPal - Refund Sale

Refunds a completed payment. Provide the sale_id in the URI and an empty JSON payload for a full refund. For partial refunds, you can include an amount.

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 v9.5.0.64 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..
    // ----------------------------------------------------------------------------------------------

    // To refund a particular amount, build JSON such as this:
    CkJsonObject jsonPartial;
    jsonPartial.put_EmitCompact(false);
    jsonPartial.UpdateString("amount.total","2.34");
    jsonPartial.UpdateString("amount.currency","USD");
    // invoice_number is optional..
    jsonPartial.UpdateString("invoice_number","INV-1234567");
    strOut.append(jsonPartial.emit());
    strOut.append("\r\n");

    // The JSON for a partial refund:

    // 	{ 
    // 	  "amount": { 
    // 	    "total": "2.34",
    // 	    "currency": "USD"
    // 	  },
    // 	  "invoice_number": "INV-1234567"
    // 	}

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

    // The sale ID is added to the path.
    // The sale ID is obtained from payment records as shown here: Find Completed Sales
    CkStringBuilder sbPath;
    sbPath.Append("/v1/payments/sale/sale_id/refund");
    int numReplaced = sbPath.Replace("sale_id","1XC17935MN507400J");

    // Send the POST request containign the JSON in the request body, and get the JSON response.
    CkStringBuilder sbJsonRequest;
    jsonPartial.put_EmitCompact(true);
    jsonPartial.EmitSb(sbJsonRequest);
    CkStringBuilder sbJsonResponse;

    bool bFullRefund = true;
    // To send a full refund, send an empty request body:
    if (bFullRefund == true) {
        sbJsonRequest.Clear();
        sbJsonRequest.Append("{}");
    }

    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;
    }

    CkJsonObject json;
    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 201 success response?
    if (rest.get_ResponseStatusCode() != 201) {
        strOut.append(json.emit());
        strOut.append("\r\n");
        strOut.append("Failed.");
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append(json.emit());
    strOut.append("\r\n");
    strOut.append("Success.");
    strOut.append("\r\n");

    // A successful JSON response:
    // The "id" is the refund_id.

    // 	{ 
    // 	  "id": "7NE550583A133505U",
    // 	  "create_time": "2016-11-26T16:38:27Z",
    // 	  "update_time": "2016-11-26T16:38:27Z",
    // 	  "state": "completed",
    // 	  "amount": { 
    // 	    "total": "289.00",
    // 	    "currency": "USD"
    // 	  },
    // 	  "sale_id": "1XC17935MN507400J",
    // 	  "parent_payment": "PAY-2AA764602T410180HLA4FX6Q",
    // 	  "links": [
    // 	    { 
    // 	      "href": "https://api.sandbox.paypal.com/v1/payments/refund/7NE550583A133505U",
    // 	      "rel": "self",
    // 	      "method": "GET"
    // 	    },
    // 	    { 
    // 	      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-2AA764602T410180HLA4FX6Q",
    // 	      "rel": "parent_payment",
    // 	      "method": "GET"
    // 	    },
    // 	    { 
    // 	      "href": "https://api.sandbox.paypal.com/v1/payments/sale/1XC17935MN507400J",
    // 	      "rel": "sale",
    // 	      "method": "GET"
    // 	    }
    // 	  ]
    // 	}


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }

 

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