java - 如何更新印度铁路网站中添加的 PNR 验证码

Question

我在 Google Play 上有一个 PNR 查询应用程序。它工作得很好。但最近 Indian Railwys 在他们的 PNR 查询部分添加了验证码，因此我无法将正确的数据传递到服务器以获得正确的响应。如何以 ImageView 的形式在我的应用程序中添加此验证码并要求用户输入验证码详细信息，以便我可以发送正确的数据并获得正确的响应。

Indian Railways PNR Inquiry Link

这是我之前使用的 PnrCheck.java。请帮助应该在这里进行哪些修改..

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.Socket;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.Header;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.HttpVersion;
import org.apache.http.entity.InputStreamEntity;
import org.apache.http.impl.DefaultHttpClientConnection;
import org.apache.http.message.BasicHttpEntityEnclosingRequest;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.BasicHttpProcessor;
import org.apache.http.protocol.ExecutionContext;
import org.apache.http.protocol.HttpContext;
import org.apache.http.protocol.HttpRequestExecutor;
import org.apache.http.protocol.RequestConnControl;
import org.apache.http.protocol.RequestContent;
import org.apache.http.protocol.RequestExpectContinue;
import org.apache.http.protocol.RequestTargetHost;
import org.apache.http.protocol.RequestUserAgent;
import org.apache.http.util.EntityUtils;

public class PNRStatusCheck {
    public static void main(String args[]) {
        try {
            String pnr1 = "1154177041";
            String reqStr = "lccp_pnrno1=" + pnr1 + "&submitpnr=Get+Status";
            PNRStatusCheck check = new PNRStatusCheck();
            StringBuffer data = check.getPNRResponse(reqStr, "http://www.indianrail.gov.in/cgi_bin/inet_pnrstat_cgi.cgi");
            if(data != null) {
                @SuppressWarnings("unused")
                PNRStatus pnr = check.parseHtml(data);
            }
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    public StringBuffer getPNRResponse(String reqStr, String urlAddr) throws Exception {
        String urlHost = null;
        int port;
        String method = null;
        try {
            URL url = new URL(urlAddr);
            urlHost = url.getHost();
            port = url.getPort();
            method = url.getFile();

            // validate port
            if(port == -1) {
                port = url.getDefaultPort();
            }
        } catch(Exception e) {
            e.printStackTrace();
            throw new Exception(e);
        }

        HttpParams params = new BasicHttpParams();
        HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
        HttpProtocolParams.setContentCharset(params, "UTF-8");
        HttpProtocolParams.setUserAgent(params, "HttpComponents/1.1");
        HttpProtocolParams.setUseExpectContinue(params, true);

        BasicHttpProcessor httpproc = new BasicHttpProcessor();
        // Required protocol interceptors
        httpproc.addInterceptor(new RequestContent());
        httpproc.addInterceptor(new RequestTargetHost());
        // Recommended protocol interceptors
        httpproc.addInterceptor(new RequestConnControl());
        httpproc.addInterceptor(new RequestUserAgent());
        httpproc.addInterceptor(new RequestExpectContinue());

        HttpRequestExecutor httpexecutor = new HttpRequestExecutor();
        HttpContext context = new BasicHttpContext(null);
        HttpHost host = new HttpHost(urlHost, port);
        DefaultHttpClientConnection conn = new DefaultHttpClientConnection();

        context.setAttribute(ExecutionContext.HTTP_CONNECTION, conn);
        context.setAttribute(ExecutionContext.HTTP_TARGET_HOST, host);
        @SuppressWarnings("unused")
        String resData = null;
        @SuppressWarnings("unused")
        String statusStr = null;
        StringBuffer buff = new StringBuffer();
        try {
            String REQ_METHOD = method;
            String[] targets = { REQ_METHOD };

            for (int i = 0; i < targets.length; i++) {
                if (!conn.isOpen()) {
                    Socket socket = new Socket(host.getHostName(), host.getPort());
                    conn.bind(socket, params);
                }
                BasicHttpEntityEnclosingRequest req = new BasicHttpEntityEnclosingRequest("POST", targets[i]);
                req.setEntity(new InputStreamEntity(new ByteArrayInputStream(reqStr.toString().getBytes()), reqStr.length()));
                req.setHeader("Content-Type", "application/x-www-form-urlencoded");
                req.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7");
                req.setHeader("Cache-Control", "max-age=0");
                req.setHeader("Connection", "keep-alive");
                req.setHeader("Origin", "http://www.indianrail.gov.in");
                req.setHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
                req.setHeader("Referer", "http://www.indianrail.gov.in/pnr_Enq.html");
                //req.setHeader("Accept-Encoding", "gzip,deflate,sdch");
                req.setHeader("Accept-Language", "en-US,en;q=0.8");
                req.setHeader("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.3");


                httpexecutor.preProcess(req, httpproc, context);

                HttpResponse response = httpexecutor.execute(req, conn, context);
                response.setParams(params);
                httpexecutor.postProcess(response, httpproc, context);

                Header[] headers = response.getAllHeaders();
                for(int j=0; j<headers.length; j++) {
                    if(headers[j].getName().equalsIgnoreCase("ERROR_MSG")) {
                        resData = EntityUtils.toString(response.getEntity());
                    } 
                }
                statusStr = response.getStatusLine().toString();
                InputStream in = response.getEntity().getContent();
                BufferedReader reader = null;
                if(in != null) {
                    reader = new BufferedReader(new InputStreamReader(in));
                }

                String line = null;
                while((line = reader.readLine()) != null) {
                    buff.append(line + "\n");
                }
                try {
                    in.close();
                } catch (Exception e) {}
            }
        } catch (Exception e) {
            throw new Exception(e);
        } finally {
            try {
                conn.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return buff;
    }

    public PNRStatus parseHtml(StringBuffer data) throws Exception {
        BufferedReader reader = null;
        if(data != null) {
            reader = new BufferedReader(new InputStreamReader(new ByteArrayInputStream(data.toString().getBytes())));
        } else {
            return null;
        }

        String line = null;
        TrainDetails trainDetails = new TrainDetails();
        List<PassengerDetails> passDetailsList = new ArrayList<PassengerDetails>();
        PassengerDetails passDetails = null;
        int i = 0;
        while ((line = reader.readLine()) != null) {
            if(line.startsWith("<TD") && line.contains("table_border_both")) {
                line = line.replace("<B>", "");
                line = line.substring(line.indexOf("\">")+2, line.indexOf("</")).trim();

                if(line.contains("CHART")) {
                    trainDetails.setChatStatus(line);
                    break;
                }
                if(i > 7) {//Passenger Details
                    if(passDetails == null) {
                        passDetails = new PassengerDetails();
                    }
                    switch(i) {
                    case 8 :
                        passDetails.setName(line);
                        break;
                    case 9 :
                        passDetails.setBookingStatus(line.replace(" ", ""));
                        break;
                    case 10 :
                        passDetails.setCurrentStatus(line.replace(" ", ""));
                        i = 7;
                        break;
                    }
                    if(i == 7 ) {
                        passDetailsList.add(passDetails);
                        passDetails = null;
                    }

                } else { // Train details
                    switch(i){
                    case 0 :
                            trainDetails.setNumber(line);
                            break;
                    case 1 :
                            trainDetails.setName(line);
                            break;
                    case 2 :
                            trainDetails.setBoardingDate(line);
                            break;
                    case 3 :
                            trainDetails.setFrom(line);
                            break;
                    case 4 :
                            trainDetails.setTo(line);
                            break;
                    case 5 :
                            trainDetails.setReservedUpto(line);
                            break;
                    case 6 :
                            trainDetails.setBoardingPoint(line);
                            break;
                    case 7 :
                            trainDetails.setReservedType(line);
                            break;
                    default :
                        break;
                    }
                }
                i++;
            }
        }

        if(trainDetails.getNumber() != null) {
            PNRStatus pnrStatus = new PNRStatus();
            pnrStatus.setTrainDetails(trainDetails);
            pnrStatus.setPassengerDetails(passDetailsList);
            return pnrStatus;
        } else {
            return null;
        }
    }

}

Answer 1

如果您右键单击该页面并在 http://www.indianrail.gov.in/pnr_Enq.html 上查看源代码，你会找到生成验证码的函数源，比较验证码并验证它:

有一个javascript函数帽子绘制验证码:

//Generates the captcha function that draws the captcha  
function DrawCaptcha()
    {       
    var a = Math.ceil(Math.random() * 9)+ '';
    var b = Math.ceil(Math.random() * 9)+ '';      
    var c = Math.ceil(Math.random() * 9)+ ''; 
    var d = Math.ceil(Math.random() * 9)+ ''; 
    var e = Math.ceil(Math.random() * 9)+ ''; 

    var code = a + b + c + d + e;
    document.getElementById("txtCaptcha").value = code;
    document.getElementById("txtCaptchaDiv").innerHTML = code; 
}

//Function to checking the form inputs:

function checkform(theform){
    var why = "";

    if(theform.txtInput.value == ""){
    why += "- Security code should not be empty.\n";
    }
    if(theform.txtInput.value != ""){
        if(ValidCaptcha(theform.txtInput.value) == false){ //here validating the captcha
            why += "- Security code did not match.\n";
        }
    }
    if(why != ""){
        alert(why);
        return false;
    }
}

// Validate the Entered input aganist the generated security code function  
function ValidCaptcha(){
    var str1 = removeSpaces(document.getElementById('txtCaptcha').value);
    var str2 = removeSpaces(document.getElementById('txtInput').value);
    if (str1 == str2){
        return true;   
    }else{
        return false;
    }
}

// Remove the spaces from the entered and generated code
function removeSpaces(string){
    return string.split(' ').join('');
}

也不是使用 URL http://www.indianrail.gov.in/cgi_bin/inet_pnrstat_cgi.cgi ，试试网址:http://www.indianrail.gov.in/cgi_bin/inet_pnstat_cgi_28688.cgi .上一个挂了我认为它已经改变了。希望对您有所帮助。