Chilkat Examples

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MFC Web API Examples

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(MFC) PayPal - Find Authorizations

Finds previously created authorizations.

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..
    // ----------------------------------------------------------------------------------------------

    // Clear the REST object of any headers or query params from previous requests.
    rest.ClearAllHeaders();
    rest.ClearAllQueryParams();

    rest.AddHeader("Authorization",sbAuth.getAsString());

    // To find authoriaztions, we list payments and look for those
    // containing "authorization" transactions
    rest.AddQueryParam("count","100");
    rest.AddQueryParam("start_index","0");
    rest.AddQueryParam("sort_by","update_time");
    rest.AddQueryParam("sort_order","asc");

    // Send the GET request and get the JSON response.
    CkStringBuilder sbJsonResponse;
    success = rest.FullRequestNoBodySb("GET","/v1/payments/payment",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);

    // (optional) Save the entire JSON response to a file to examine if desired..
    CkStringBuilder sbTemp;
    json.EmitSb(sbTemp);
    sbTemp.WriteFile("qa_output/paypal_payments.json","utf-8",false);

    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;
    }

    // We are looking for "authorization" transactions .
    // As shown below, we are looking in the "transactions" for "related_resources"
    // containing "authorization" JSON objects. 

    // 	{ 
    // 	  "payments": [
    // 	    { 
    // 	      "id": "PAY-3SL8976592063093RLA3DMAY",
    // 	      "create_time": "2016-11-24T00:36:19Z",
    // 	      "update_time": "2016-11-24T00:36:24Z",
    // 	      "state": "approved",
    // 	      "intent": "authorize",
    // 	      "payer": { 
    // 	        "payment_method": "credit_card",
    // 	        "funding_instruments": [
    // 	          { 
    // 	            "credit_card_token": { 
    // 	              "credit_card_id": "CARD-52W84623JH8043102LA3CLGA",
    // 	              "payer_id": "user12345",
    // 	              "last4": "9974",
    // 	              "type": "visa",
    // 	              "expire_month": "9",
    // 	              "expire_year": "2021"
    // 	            }
    // 	          }
    // 	        ]
    // 	      },
    // 	      "transactions": [
    // 	        { 
    // 	          "amount": { 
    // 	            "total": "6.70",
    // 	            "currency": "USD",
    // 	            "details": { 
    // 	              "subtotal": "6.70"
    // 	            }
    // 	          },
    // 	          "description": "This is the payment transaction description.",
    // 	          "related_resources": [
    // 	            { 
    // 	              "authorization": { 
    // 	                "id": "6HG91590AX913463C",
    // 	                "create_time": "2016-11-24T00:36:19Z",
    // 	                "update_time": "2016-11-24T00:36:24Z",
    // 	                "amount": { 
    // 	                  ...
    // 	                  }
    // 	                },
    // 	                "state": "authorized",
    // 	                "parent_payment": "PAY-3SL8976592063093RLA3DMAY",
    // 	                "valid_until": "2016-12-23T00:36:19Z",
    // 			...
    // 

    // Iterate over the payments and show each authorization
    int numPayments = json.SizeOfArray("payments");
    int i = 0;
    while (i < numPayments) {
        json.put_I(i);
        int j = 0;
        int numTransactions = json.SizeOfArray("payments[i].transactions");
        while (j < numTransactions) {
            json.put_J(j);
            int numRelatedResources = json.SizeOfArray("payments[i].transactions[j].related_resources");
            int k = 0;
            while (k < numRelatedResources) {
                json.put_K(k);
                if (json.HasMember("payments[i].transactions[j].related_resources[k].authorization") == true) {
                    CkJsonObject *jsonAuth = json.ObjectOf("payments[i].transactions[j].related_resources[k].authorization");
                    strOut.append("authorization id: ");
                    strOut.append(jsonAuth->stringOf("id"));
                    strOut.append("\r\n");
                    strOut.append("state: ");
                    strOut.append(jsonAuth->stringOf("state"));
                    strOut.append("\r\n");
                    strOut.append("total: ");
                    strOut.append(jsonAuth->stringOf("amount.total"));
                    strOut.append("\r\n");
                    strOut.append("----");
                    strOut.append("\r\n");
                    delete jsonAuth;
                }

                k = k + 1;
            }

            j = j + 1;
        }

        i = i + 1;
    }

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


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }

 

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