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Visual FoxPro

DVLA Vehicle Enquiry Service

See more _Miscellaneous_ Examples

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.

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LOCAL lnSuccess
LOCAL loHttp
LOCAL loJson
LOCAL loResp
LOCAL loSbResponseBody
LOCAL loJResp
LOCAL lnRespStatusCode
LOCAL lcArtEndDate
LOCAL lnCo2Emissions
LOCAL lcColour
LOCAL lnEngineCapacity
LOCAL lcFuelType
LOCAL lcMake
LOCAL lnMarkedForExport
LOCAL lcMonthOfFirstRegistration
LOCAL lcMotStatus
LOCAL lcRegistrationNumber
LOCAL lnRevenueWeight
LOCAL lcTaxDueDate
LOCAL lcTaxStatus
LOCAL lcTypeApproval
LOCAL lcWheelplan
LOCAL lnYearOfManufacture
LOCAL lcEuroStatus
LOCAL lcRealDrivingEmissions
LOCAL lcDateOfLastV5CIssued

lnSuccess = 0

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

loHttp = CreateObject('Chilkat.Http')

* 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"
* }

loJson = CreateObject('Chilkat.JsonObject')
loJson.UpdateString("registrationNumber","ABC1234")

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

loResp = CreateObject('Chilkat.HttpResponse')
lnSuccess = loHttp.HttpJson("POST","https://driver-vehicle-licensing.api.gov.uk/vehicle-enquiry/v1/vehicles",loJson,"application/json",loResp)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loHttp
    RELEASE loJson
    RELEASE loResp
    CANCEL
ENDIF

loSbResponseBody = CreateObject('Chilkat.StringBuilder')
loResp.GetBodySb(loSbResponseBody)
loJResp = CreateObject('Chilkat.JsonObject')
loJResp.LoadSb(loSbResponseBody)
loJResp.EmitCompact = 0

? "Response Body:"
? loJResp.Emit()

lnRespStatusCode = loResp.StatusCode
? "Response Status Code = " + STR(lnRespStatusCode)
IF (lnRespStatusCode >= 400) THEN
    ? "Response Header:"
    ? loResp.Header
    ? "Failed."
    RELEASE loHttp
    RELEASE loJson
    RELEASE loResp
    RELEASE loSbResponseBody
    RELEASE loJResp
    CANCEL
ENDIF

* 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

lcArtEndDate = loJResp.StringOf("artEndDate")
lnCo2Emissions = loJResp.IntOf("co2Emissions")
lcColour = loJResp.StringOf("colour")
lnEngineCapacity = loJResp.IntOf("engineCapacity")
lcFuelType = loJResp.StringOf("fuelType")
lcMake = loJResp.StringOf("make")
lnMarkedForExport = loJResp.BoolOf("markedForExport")
lcMonthOfFirstRegistration = loJResp.StringOf("monthOfFirstRegistration")
lcMotStatus = loJResp.StringOf("motStatus")
lcRegistrationNumber = loJResp.StringOf("registrationNumber")
lnRevenueWeight = loJResp.IntOf("revenueWeight")
lcTaxDueDate = loJResp.StringOf("taxDueDate")
lcTaxStatus = loJResp.StringOf("taxStatus")
lcTypeApproval = loJResp.StringOf("typeApproval")
lcWheelplan = loJResp.StringOf("wheelplan")
lnYearOfManufacture = loJResp.IntOf("yearOfManufacture")
lcEuroStatus = loJResp.StringOf("euroStatus")
lcRealDrivingEmissions = loJResp.StringOf("realDrivingEmissions")
lcDateOfLastV5CIssued = loJResp.StringOf("dateOfLastV5CIssued")

RELEASE loHttp
RELEASE loJson
RELEASE loResp
RELEASE loSbResponseBody
RELEASE loJResp