(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 <C_CkHttp.h>
#include <C_CkJsonObject.h>
#include <C_CkHttpResponse.h>
#include <C_CkStringBuilder.h>

void ChilkatSample(void)
    {
    HCkHttp http;
    BOOL success;
    HCkJsonObject json;
    HCkHttpResponse resp;
    HCkStringBuilder sbResponseBody;
    HCkJsonObject jResp;
    int respStatusCode;
    const char *artEndDate;
    int co2Emissions;
    const char *colour;
    int engineCapacity;
    const char *fuelType;
    const char *make;
    BOOL markedForExport;
    const char *monthOfFirstRegistration;
    const char *motStatus;
    const char *registrationNumber;
    int revenueWeight;
    const char *taxDueDate;
    const char *taxStatus;
    const char *typeApproval;
    const char *wheelplan;
    int yearOfManufacture;
    const char *euroStatus;
    const char *realDrivingEmissions;
    const char *dateOfLastV5CIssued;

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

    http = CkHttp_Create();

    // 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"
    // }

    json = CkJsonObject_Create();
    CkJsonObject_UpdateString(json,"registrationNumber","ABC1234");

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

    resp = CkHttp_PostJson3(http,"https://driver-vehicle-licensing.api.gov.uk/vehicle-enquiry/v1/vehicles","application/json",json);
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkJsonObject_Dispose(json);
        return;
    }

    sbResponseBody = CkStringBuilder_Create();
    CkHttpResponse_GetBodySb(resp,sbResponseBody);
    jResp = CkJsonObject_Create();
    CkJsonObject_LoadSb(jResp,sbResponseBody);
    CkJsonObject_putEmitCompact(jResp,FALSE);

    printf("Response Body:\n");
    printf("%s\n",CkJsonObject_emit(jResp));

    respStatusCode = CkHttpResponse_getStatusCode(resp);
    printf("Response Status Code = %d\n",respStatusCode);
    if (respStatusCode >= 400) {
        printf("Response Header:\n");
        printf("%s\n",CkHttpResponse_header(resp));
        printf("Failed.\n");
        CkHttpResponse_Dispose(resp);
        CkHttp_Dispose(http);
        CkJsonObject_Dispose(json);
        CkStringBuilder_Dispose(sbResponseBody);
        CkJsonObject_Dispose(jResp);
        return;
    }

    CkHttpResponse_Dispose(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.

    artEndDate = CkJsonObject_stringOf(jResp,"artEndDate");
    co2Emissions = CkJsonObject_IntOf(jResp,"co2Emissions");
    colour = CkJsonObject_stringOf(jResp,"colour");
    engineCapacity = CkJsonObject_IntOf(jResp,"engineCapacity");
    fuelType = CkJsonObject_stringOf(jResp,"fuelType");
    make = CkJsonObject_stringOf(jResp,"make");
    markedForExport = CkJsonObject_BoolOf(jResp,"markedForExport");
    monthOfFirstRegistration = CkJsonObject_stringOf(jResp,"monthOfFirstRegistration");
    motStatus = CkJsonObject_stringOf(jResp,"motStatus");
    registrationNumber = CkJsonObject_stringOf(jResp,"registrationNumber");
    revenueWeight = CkJsonObject_IntOf(jResp,"revenueWeight");
    taxDueDate = CkJsonObject_stringOf(jResp,"taxDueDate");
    taxStatus = CkJsonObject_stringOf(jResp,"taxStatus");
    typeApproval = CkJsonObject_stringOf(jResp,"typeApproval");
    wheelplan = CkJsonObject_stringOf(jResp,"wheelplan");
    yearOfManufacture = CkJsonObject_IntOf(jResp,"yearOfManufacture");
    euroStatus = CkJsonObject_stringOf(jResp,"euroStatus");
    realDrivingEmissions = CkJsonObject_stringOf(jResp,"realDrivingEmissions");
    dateOfLastV5CIssued = CkJsonObject_stringOf(jResp,"dateOfLastV5CIssued");


    CkHttp_Dispose(http);
    CkJsonObject_Dispose(json);
    CkStringBuilder_Dispose(sbResponseBody);
    CkJsonObject_Dispose(jResp);

    }