(Unicode C++) DVLA Vehicle Enquiry Service

Demonstrates how to make a call to the DVLA Vehicle Enquiry API to get vehicle details of a specified vehicle. It uses the vehicle registration number as input to search and provide details of the vehicle.

For more information, see https://developer-portal.driver-vehicle-licensing.api.gov.uk/apis/vehicle-enquiry-service/vehicle-enquiry-service-description.html

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#include <CkHttpW.h>
#include <CkJsonObjectW.h>
#include <CkHttpResponseW.h>
#include <CkStringBuilderW.h>

void ChilkatSample(void)
    {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkHttpW http;
    bool success;

    // Implements the following CURL command:

    // curl -X POST https://driver-vehicle-licensing.api.gov.uk/vehicle-enquiry/v1/vehicles \
    //   -H "x-api-key: supplied API key" \
    //   -H "Accept: application/json" \
    //   -d '{"registrationNumber": "ABC1234"}'

    // Use the following online tool to generate HTTP code from a CURL command
    // Convert a cURL Command to HTTP Source Code

    // Use this online tool to generate code from sample JSON:
    // Generate Code to Create JSON

    // The following JSON is sent in the request body.

    // {
    //   "registrationNumber": "ABC1234"
    // }

    CkJsonObjectW json;
    json.UpdateString(L"registrationNumber",L"ABC1234");

    http.SetRequestHeader(L"Accept",L"application/json");
    http.SetRequestHeader(L"x-api-key",L"supplied API key");

    CkHttpResponseW *resp = http.PostJson3(L"https://driver-vehicle-licensing.api.gov.uk/vehicle-enquiry/v1/vehicles",L"application/json",json);
    if (http.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    CkStringBuilderW sbResponseBody;
    resp->GetBodySb(sbResponseBody);
    CkJsonObjectW jResp;
    jResp.LoadSb(sbResponseBody);
    jResp.put_EmitCompact(false);

    wprintf(L"Response Body:\n");
    wprintf(L"%s\n",jResp.emit());

    int respStatusCode = resp->get_StatusCode();
    wprintf(L"Response Status Code = %d\n",respStatusCode);
    if (respStatusCode >= 400) {
        wprintf(L"Response Header:\n");
        wprintf(L"%s\n",resp->header());
        wprintf(L"Failed.\n");
        delete resp;
        return;
    }

    delete resp;

    // Sample JSON response:
    // (Sample code for parsing the JSON response is shown below)

    // {
    //   "artEndDate": "2025-02-28",
    //   "co2Emissions": 135,
    //   "colour": "BLUE",
    //   "engineCapacity": 2494,
    //   "fuelType": "PETROL",
    //   "make": "ROVER",
    //   "markedForExport": false,
    //   "monthOfFirstRegistration": "2004-12",
    //   "motStatus": "No details held by DVLA",
    //   "registrationNumber": "ABC1234",
    //   "revenueWeight": 1640,
    //   "taxDueDate": "2007-01-01",
    //   "taxStatus": "Untaxed",
    //   "typeApproval": "N1",
    //   "wheelplan": "NON STANDARD",
    //   "yearOfManufacture": 2004,
    //   "euroStatus": "EURO 6 AD",
    //   "realDrivingEmissions": "1",
    //   "dateOfLastV5CIssued": "2016-12-25"
    // }

    // Sample code for parsing the JSON response...
    // Use the following online tool to generate parsing code from sample JSON:
    // Generate Parsing Code from JSON

    // Chilkat functions returning "const char *" return a pointer to temporary internal memory owned and managed by Chilkat.
    // See this example explaining how this memory should be used: const char * functions.

    const wchar_t *artEndDate = jResp.stringOf(L"artEndDate");
    int co2Emissions = jResp.IntOf(L"co2Emissions");
    const wchar_t *colour = jResp.stringOf(L"colour");
    int engineCapacity = jResp.IntOf(L"engineCapacity");
    const wchar_t *fuelType = jResp.stringOf(L"fuelType");
    const wchar_t *make = jResp.stringOf(L"make");
    bool markedForExport = jResp.BoolOf(L"markedForExport");
    const wchar_t *monthOfFirstRegistration = jResp.stringOf(L"monthOfFirstRegistration");
    const wchar_t *motStatus = jResp.stringOf(L"motStatus");
    const wchar_t *registrationNumber = jResp.stringOf(L"registrationNumber");
    int revenueWeight = jResp.IntOf(L"revenueWeight");
    const wchar_t *taxDueDate = jResp.stringOf(L"taxDueDate");
    const wchar_t *taxStatus = jResp.stringOf(L"taxStatus");
    const wchar_t *typeApproval = jResp.stringOf(L"typeApproval");
    const wchar_t *wheelplan = jResp.stringOf(L"wheelplan");
    int yearOfManufacture = jResp.IntOf(L"yearOfManufacture");
    const wchar_t *euroStatus = jResp.stringOf(L"euroStatus");
    const wchar_t *realDrivingEmissions = jResp.stringOf(L"realDrivingEmissions");
    const wchar_t *dateOfLastV5CIssued = jResp.stringOf(L"dateOfLastV5CIssued");
    }