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C Web API Examples

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(C) PayPal - Find Authorizations

Finds previously created authorizations.

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

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#include <C_CkJsonObject.h>
#include <C_CkStringBuilder.h>
#include <C_CkRest.h>

void ChilkatSample(void)
    {
    HCkJsonObject jsonToken;
    HCkStringBuilder sbAuth;
    HCkRest rest;
    BOOL bAutoReconnect;
    BOOL success;
    HCkStringBuilder sbJsonResponse;
    HCkJsonObject json;
    HCkStringBuilder sbTemp;
    int numPayments;
    int i;
    int j;
    int numTransactions;
    int numRelatedResources;
    int k;
    HCkJsonObject jsonAuth;

    // 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 = CkJsonObject_Create();
    CkJsonObject_LoadFile(jsonToken,"qa_data/tokens/paypal.json");

    // Build the Authorization request header field value.
    sbAuth = CkStringBuilder_Create();
    // token_type should be "Bearer"
    CkStringBuilder_Append(sbAuth,CkJsonObject_stringOf(jsonToken,"token_type"));
    CkStringBuilder_Append(sbAuth," ");
    CkStringBuilder_Append(sbAuth,CkJsonObject_stringOf(jsonToken,"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 = CkRest_Create();
    bAutoReconnect = TRUE;
    success = CkRest_Connect(rest,"api.sandbox.paypal.com",443,TRUE,bAutoReconnect);
    if (success != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkJsonObject_Dispose(jsonToken);
        CkStringBuilder_Dispose(sbAuth);
        CkRest_Dispose(rest);
        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.
    CkRest_ClearAllHeaders(rest);
    CkRest_ClearAllQueryParams(rest);

    CkRest_AddHeader(rest,"Authorization",CkStringBuilder_getAsString(sbAuth));

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

    // Send the GET request and get the JSON response.
    sbJsonResponse = CkStringBuilder_Create();
    success = CkRest_FullRequestNoBodySb(rest,"GET","/v1/payments/payment",sbJsonResponse);
    if (success != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkJsonObject_Dispose(jsonToken);
        CkStringBuilder_Dispose(sbAuth);
        CkRest_Dispose(rest);
        CkStringBuilder_Dispose(sbJsonResponse);
        return;
    }

    json = CkJsonObject_Create();
    CkJsonObject_putEmitCompact(json,FALSE);
    CkJsonObject_LoadSb(json,sbJsonResponse);

    // (optional) Save the entire JSON response to a file to examine if desired..
    sbTemp = CkStringBuilder_Create();
    CkJsonObject_EmitSb(json,sbTemp);
    CkStringBuilder_WriteFile(sbTemp,"qa_output/paypal_payments.json","utf-8",FALSE);

    printf("Response Status Code = %d\n",CkRest_getResponseStatusCode(rest));

    // Did we get a 200 success response?
    if (CkRest_getResponseStatusCode(rest) != 200) {
        printf("%s\n",CkJsonObject_emit(json));
        printf("Failed.\n");
        CkJsonObject_Dispose(jsonToken);
        CkStringBuilder_Dispose(sbAuth);
        CkRest_Dispose(rest);
        CkStringBuilder_Dispose(sbJsonResponse);
        CkJsonObject_Dispose(json);
        CkStringBuilder_Dispose(sbTemp);
        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
    numPayments = CkJsonObject_SizeOfArray(json,"payments");
    i = 0;
    while (i < numPayments) {
        CkJsonObject_putI(json,i);
        j = 0;
        numTransactions = CkJsonObject_SizeOfArray(json,"payments[i].transactions");
        while (j < numTransactions) {
            CkJsonObject_putJ(json,j);
            numRelatedResources = CkJsonObject_SizeOfArray(json,"payments[i].transactions[j].related_resources");
            k = 0;
            while (k < numRelatedResources) {
                CkJsonObject_putK(json,k);
                if (CkJsonObject_HasMember(json,"payments[i].transactions[j].related_resources[k].authorization") == TRUE) {
                    jsonAuth = CkJsonObject_ObjectOf(json,"payments[i].transactions[j].related_resources[k].authorization");
                    printf("authorization id: %s\n",CkJsonObject_stringOf(jsonAuth,"id"));
                    printf("state: %s\n",CkJsonObject_stringOf(jsonAuth,"state"));
                    printf("total: %s\n",CkJsonObject_stringOf(jsonAuth,"amount.total"));
                    printf("----\n");
                    CkJsonObject_Dispose(jsonAuth);
                }

                k = k + 1;
            }

            j = j + 1;
        }

        i = i + 1;
    }

    printf("success\n");


    CkJsonObject_Dispose(jsonToken);
    CkStringBuilder_Dispose(sbAuth);
    CkRest_Dispose(rest);
    CkStringBuilder_Dispose(sbJsonResponse);
    CkJsonObject_Dispose(json);
    CkStringBuilder_Dispose(sbTemp);

    }

 

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