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| package com.kom1rok.pronobot.parser;
import java.io.IOException;
import java.net.SocketTimeoutException;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.X509TrustManager;
import org.jsoup.Connection;
import org.jsoup.HttpStatusException;
import org.jsoup.Jsoup;
import org.jsoup.Connection.Method;
import org.jsoup.nodes.Document;
public abstract class AbstractParser {
private static int RETRY_LIMIT = 3;
protected Map<String,String> COOKIES;
private DateFormat siteDateFormat;
private DateFormat frenchDateFormat;
public AbstractParser() {
COOKIES = new HashMap<String, String>();
trustEveryone();
siteDateFormat = new SimpleDateFormat(getDateSitePattern());
frenchDateFormat = new SimpleDateFormat("dd-MM-yyyy");
}
/**
* Work done in the specific parser
* @param date
* @return pronostics for the given date
*/
protected abstract void fillPronoList(Calendar date, List<String> results);
/**
* Defines the pattern of date on the web site
* @return
*/
protected abstract String getDateSitePattern();
/**
* Url used for the login on given web site
* @return
*/
protected abstract String getLoginUrl();
/**
* Cookies's names
* @return
*/
protected abstract String[] getCookiesNames();
/**
* Retrieve the session's cookie in order to be logged on the web site.
* @return
*/
protected void getConnectionCookie(String username, String password) {
// Do nothing if it's not necessary
if(getLoginUrl() == null || getCookiesNames() == null) {
return;
}
System.out.println("Get cookie from URL : " + getLoginUrl());
try {
Connection.Response res = Jsoup.connect(getLoginUrl())
.data("login", username, "password", password)
.method(Method.POST)
.userAgent("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.152 Safari/537.36")
.timeout(15 * 1000)
.execute();
for(String cookieName : getCookiesNames()) {
COOKIES.put(cookieName, res.cookie(cookieName));
}
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* Ignore all SSL certificates so the https links can be read.
*/
private void trustEveryone() {
try {
HttpsURLConnection
.setDefaultHostnameVerifier(new HostnameVerifier() {
public boolean verify(String hostname,
SSLSession session) {
return true;
}
});
SSLContext context = SSLContext.getInstance("TLS");
context.init(null, new X509TrustManager[] { new X509TrustManager() {
public void checkClientTrusted(X509Certificate[] chain,
String authType) throws CertificateException {
}
public void checkServerTrusted(X509Certificate[] chain,
String authType) throws CertificateException {
}
public X509Certificate[] getAcceptedIssuers() {
return new X509Certificate[0];
}
} }, new SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(context
.getSocketFactory());
} catch (Exception e) {
// should never happen
e.printStackTrace();
}
}
/**
* Retrieve a document for a given url.
* @param url
* @return
*/
protected final Document getDocument(String url) {
return getDocument(url, null);
}
/**
* Retrieve a document for a given url.
* @param url
* @return
* @throws Exception
*/
protected final Document getDocument(String url, Map<String, String> cookie) {
Document doc = null;
int nbTry = 0;
if(url == null) { return null; }
while(doc == null && nbTry < RETRY_LIMIT) {
try {
Connection connection = Jsoup.connect(url).referrer(url).timeout(15 * 1000);
// Add cookies if given
if(cookie != null) {
connection = connection.cookies(cookie);
}
doc = connection.get();
} catch (HttpStatusException e) {
System.out.println("HttpStatusException catched, waiting 20sec and retry");
} catch (SocketTimeoutException e) {
// Retry at the end of this method
System.out.println("Time out catched, waiting 20sec and retry");
} catch (IOException e) {
System.out.println("An exception occured while accessing to url : " + url + " - " + e.toString());
}
if(doc == null) {
try {
System.out.println("Doc is null, waiting 20sec and retry");
nbTry++;
System.out.println("Try number " + nbTry);
Thread.sleep(20 * 1000);
} catch (InterruptedException e1) {
e1.printStackTrace();
}
}
}
return doc;
}
/**
* Entry point of the parser.
* This method permits to retrieve the pronostics for the given date by using the parser.
* @param date
* @return
* @throws Exception
*/
public String getPronosticForDate(Calendar date) throws Exception {
List<String> pronos = new ArrayList<String>();
fillPronoList(date, pronos); // get pronostics from given url
return generateRow(getDateInFrenchFormat(date), pronos);
}
/**
* generate a String from the date and given pronostics
* @param date
* @param pronos
* @return
*/
private final String generateRow(String date, List<String> pronos) {
StringBuilder result = new StringBuilder();
result.append(date).append('\t');
if(pronos != null && !pronos.isEmpty()) {
// the list contains the four first pronostics of the course
Iterator<String> it = pronos.iterator();
while(it.hasNext()) {
result.append(it.next());
if(it.hasNext()) {
result.append('\t');
}
}
}
result.append('\n');
System.out.println(result.toString());
return result.toString();
}
protected String getDateInSiteFormat(Calendar date) {
return siteDateFormat.format(date.getTime());
}
protected String getDateInFrenchFormat(Calendar date) {
return frenchDateFormat.format(date.getTime());
}
} |
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