如何更新印度铁路网站添加的PNR Capcha
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给服务器以获得正确的响应。 如何在我的应用程序中以图像视图的形式添加此验证码，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适当的响应。
印度铁路PNR查询链接
这是我之前使用的PnrCheck.java。 请帮忙在这里做些什么修改..
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;
}
}
}
我在一个帖子中发现了这个答案：
如果你检查html代码，它的实际上很糟糕的验证码。 验证码的背景是：http://www.indianrail.gov.in/1.jpg这些数字在输入标签中是实际的：
他们正在通过javascript使用来自该隐藏输入标签的数字，并将它们放在具有“验证码”背景的跨度上。
基本上你的流程是：
阅读他们的HTML
从输入字段获取“captcha”（笑，有趣的captcha虽然）值
当用户将数据放入您的PNR字段并按下获取状态时
张贴表单字段，将PNR置于适当的值，将captcha置于适当的值
解析响应
噢，还有一件事。 只要它们相同，您可以在隐藏输入和“验证码”输入中输入任何值。 他们没有通过会话或任何其他方式检查它。
编辑（提交表单的代码示例）：为了简化发布表单，我推荐Apache使用HttpClient组件：http://hc.apache.org/downloads.cgi假设你下载了HttpClient 4.3.1。 在您的项目中包含客户端，核心和mime库（复制到libs文件夹，右键单击项目，属性，Java Build Path，库，添加Jars - >添加那些3）。
代码示例是：
private static final String FORM_TARGET = "http://www.indianrail.gov.in/cgi_bin/inet_pnstat_cgi.cgi";
private static final String INPUT_PNR = "lccp_pnrno1";
private static final String INPUT_CAPTCHA = "lccp_capinp_val";
private static final String INPUT_CAPTCHA_HIDDEN = "lccp_cap_val";
private void getHtml(String userPnr) {
MultipartEntityBuilder builder = MultipartEntityBuilder.create();
builder.addTextBody(INPUT_PNR, userPnr); // users PNR code
builder.addTextBody(INPUT_CAPTCHA, "123456");
builder.addTextBody("submit", "Get Status");
builder.addTextBody(INPUT_CAPTCHA_HIDDEN, "123456"); // values don't
// matter as
// long as they
// are the same
HttpEntity entity = builder.build();
HttpPost httpPost = new HttpPost(FORM_TARGET);
httpPost.setEntity(entity);
HttpClient client = new DefaultHttpClient();
HttpResponse response = null;
String htmlString = "";
try {
response = client.execute(httpPost);
htmlString = convertStreamToString(response.getEntity().getContent());
// now you can parse this string to get data you require.
} catch (Exception letsIgnoreItForNow) {
}
}
private static String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line);
}
} catch (IOException ignoredOnceMore) {
} finally {
try {
is.close();
} catch (IOException manyIgnoredExceptions) {
}
}
return sb.toString();
}
另外，要警告我没有在AsyncTask调用中包装它，所以你必须这样做。
如果你右键点击该页面并在http://www.indianrail.gov.in/pnr_Enq.html上查看源代码，你会发现生成验证码的函数的来源，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('');
}
此外，而不是使用URL http://www.indianrail.gov.in/cgi_bin/inet_pnrstat_cgi.cgi，尝试URL：http://www.indianrail.gov.in/cgi_bin/inet_pnstat_cgi_28688.cgi。 前一个是失败。 我认为它已经改变了。 希望这可以帮助你。
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