VehicleNumberChecker.java

import org.apache.http.HttpHeaders;
import org.apache.http.HttpStatus;
import org.apache.http.client.utils.URLEncodedUtils;
import org.json.JSONObject;
import org.jsoup.Connection;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * The class uses Indian Govt's website https://parivahan.gov.in to check vehicle number and retrieve information
 *
 * Reference Code: https://gist.github.com/githubsrinath/560e2382cb3f84e421f8cf14e5e912b0#file-03-java-or-android
 *
 *
 */
public class VehicleNumberChecker {

    public static void main(String[] args) {
        //  Must be 2 letters and characters only (Union Territory / State code)
        String utOrState = "XX";

        //  Must be 2 letters and numbers only    (District serial number)
        String districtNumber = "00";

        //  optional and can be blank             (Optional code for additional sub-category needs)
        String additionalCode = "XX";

        //  Must be 4 letters and numbers only    (Vehicle serial number)
        String serialNumber = "0000";

        Map<String, String> data = getData(utOrState + districtNumber + additionalCode + serialNumber);

        JSONObject json = new JSONObject(data);

        System.out.println(json);
    }

    private static Map<String, String> getData(String str) {
        Map<String, String> resultMap = new HashMap<>();
        String str2 = "";
        Matcher matcher = Pattern.compile("(\\w{2})(\\d{2})(\\D*?)(\\d{1,4})").matcher(str);
        if (matcher.matches()) {
            str2 = matcher.replaceFirst("$1$2$3-$4");
        }
        String[] split = str2.split("-");
        String str3 = split[0];
        str = split[1];
        try {
            Connection.Response execute = Jsoup.connect("https://parivahan.gov.in/rcdlstatus/?pur_cd=102")
                    //.validateTLSCertificates(false)   // The site is secure now and it is expected to always validate cert
                    .followRedirects(true)
                    .ignoreHttpErrors(true)
                    .method(Connection.Method.GET).execute();

            if (execute.statusCode() <= HttpStatus.SC_INTERNAL_SERVER_ERROR) {
                Map<String, String> cookies = execute.cookies();
                Document parse = Jsoup.parse(execute.body());
                Element first = parse.getElementsByAttributeValue("name", "javax.faces.ViewState").first();
                if (first == null) {
                    first = parse.getElementById("j_id1:javax.faces.ViewState:0");
                }
                String attr = first.attr("value");
                String trim = Jsoup.parse(execute.body())
                        .getElementsByAttributeValueStarting("id", "form_rcdl:j_idt")
                        .select("button")
                        .get(0).attr("id").trim();

                str = Jsoup.connect("https://parivahan.gov.in/rcdlstatus/vahan/rcDlHome.xhtml")
                        //.validateTLSCertificates(false)   // The site is secure now and it is expected to always validate cert
                        .followRedirects(true)
                        .method(Connection.Method.POST)
                        .cookies(cookies)
                        .referrer("https://parivahan.gov.in/rcdlstatus/?pur_cd=102")
                        .header("Content-Type", URLEncodedUtils.CONTENT_TYPE)
                        .header("Host", "parivahan.gov.in")
                        .header(HttpHeaders.ACCEPT, "application/xml, text/xml, */*; q=0.01")
                        .header(HttpHeaders.ACCEPT_LANGUAGE, "en-US,en;q=0.5")
                        .header(HttpHeaders.ACCEPT_ENCODING, "gzip, deflate, br")
                        .header("X-Requested-With", "XMLHttpRequest")
                        .header("Faces-Request", "partial/ajax")
                        .header("Origin", "https://parivahan.gov.in")
                        .userAgent("Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36")
                        .data("javax.faces.partial.ajax", "true")
                        .data("javax.faces.source", trim)
                        .data("javax.faces.partial.execute", "@all")
                        .data("javax.faces.partial.render", "form_rcdl:pnl_show form_rcdl:pg_show form_rcdl:rcdl_pnl")
                        .data(trim, trim)
                        .data("form_rcdl", "form_rcdl")
                        .data("form_rcdl:tf_reg_no1", str3)
                        .data("form_rcdl:tf_reg_no2", str)
                        .data("javax.faces.ViewState", attr)
                        .execute()
                        .body();

                if (str.contains("Registration No. does not exist!!!")) {
                    resultMap.put(str, "No Record(s) Found");
                } else {
                    String htmlString = "<!DOCTYPE html><html><body>" +
                            str.substring(str.indexOf("<table"), str.lastIndexOf("</table>")) +
                            "</body></html>";
                    Document parse2 = Jsoup.parse(htmlString);

                    Element first2 = parse2.select("table").first();
                    if (first2 != null) {
                        Elements select = first2.select("tr");
                        for (Element element : select) {
                            Elements select2 = element.select("td");
                            if (select2.size() == 2) {
                                String key = select2.get(0).text().replace(":", "");
                                resultMap.put(key, select2.get(1).text());
                            } else if (select2.size() == 4) {
                                String key = select2.get(0).text().replace(":", "");
                                resultMap.put(key, select2.get(1).text());

                                key = select2.get(2).text().replace(":", "");
                                resultMap.put(key, select2.get(3).text());
                            }
                        }
                    } else {
                        resultMap.put(str, "No Record(s) Found");
                    }
                }
            } else {
                resultMap.put(str, "500 Server Error");
            }
        } catch (Exception unused) {
            resultMap.put(str, "Server Error");
        }
        return resultMap;
    }
}