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MyCrawler.java
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MyCrawler.java
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package crawler;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map.Entry;
import java.util.Set;
import java.util.regex.Pattern;
import edu.uci.ics.crawler4j.crawler.Page;
import edu.uci.ics.crawler4j.crawler.WebCrawler;
import edu.uci.ics.crawler4j.parser.HtmlParseData;
import edu.uci.ics.crawler4j.url.WebURL;
public class MyCrawler extends WebCrawler {
//private final static Pattern FILTERS = Pattern.compile(".*(\\.(css|js|gif|jpg"
// + "|png|mp3|mp3|zip|gz))$");
//private static final Pattern FILTERS = Pattern.compile(
// ".*(\\.(css|js|mid|mp2|mp3|mp4|wav|avi|mov|mpeg|ram|m4v|svg" +
// "|rm|smil|wmv|swf|wma|zip|rar|gz|xml|rss|json|ico))$");
private final static Pattern FILTERS = Pattern.compile(".*(\\.(css|js|mp3|mp3|zip|gz|csv))$");
static int visited=0,succeeded=0,aborted=0,unique=0,nonunique=0,totalsize=0;
static int groupA=0, groupB=0, groupC=0, groupD=0, groupE=0; //filesize
static int texthtml=0,imagegif=0,imagejpeg=0,imagepng=0,pdf=0;
static HashSet<String> uniqueHS=new HashSet<String>();
static int OK=0, N_OK=0,uniqueoutside=0,uniqueinside=0;
static HashMap<Integer, Integer> statusHS=new HashMap<Integer,Integer>();
/**
* This method receives two parameters. The first parameter is the page
* in which we have discovered this new url and the second parameter is
* the new url.
*/
@Override
public boolean shouldVisit(Page referringPage, WebURL url) {
String href = url.getURL().toLowerCase();
//System.out.println("HREF IS!! "+ href);
String okay="";
if(uniqueHS.contains(href)){
nonunique++;
}
else{
uniqueHS.add(href);
unique++;
if(href.startsWith("http://www.latimes.com/") || href.startsWith("https://www.latimes.com/")){
uniqueinside++;
}
else{
uniqueoutside++;
}
}
if(href.startsWith("http://www.latimes.com/") || href.startsWith("https://www.latimes.com/")){
okay="OK";
}
else{
okay="N_OK";
}
FileWriter pw;
try {
File f=new File("/Users/mahima/Desktop/CrawlerResults3/urls_latimes.csv");
if(f.exists()){
pw = new FileWriter(f.getAbsoluteFile(),true);
StringBuilder sb = new StringBuilder();
sb.append(href);
sb.append(',');
sb.append(okay);
sb.append('\n');
pw.write(sb.toString());
pw.flush();
pw.close();
}
else{
pw = new FileWriter(f);
StringBuilder sb = new StringBuilder();
sb.append("URL");
sb.append(',');
sb.append("OK/N_OK?");
sb.append('\n');
sb.append(href);
sb.append(',');
sb.append(okay);
sb.append('\n');
pw.write(sb.toString());
pw.flush();
pw.close();
}
return !FILTERS.matcher(href).matches()
&& (href.startsWith("http://www.latimes.com/") || href.startsWith("https://www.latimes.com/")) && !href.contains(".css") && !href.contains(".svg") && !href.contains(".ico") && !href.contains(".xml");
// !(!FILTERS.matcher(href).matches() && href.startsWith("https://www.latimes.com/") && !href.contains(".css") && !href.contains(".svg") && !href.contains(".ico"));
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return false;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return false;
}
}
/**
* This function is called when a page is fetched and ready
* to be processed by your program.
*/
@Override
public void visit(Page page) {
String url = page.getWebURL().getURL();
System.out.println("URL: " + url);
//Adds to the total number of pages
//countVisited();
//Get the content type
String ctype=page.getContentType();
if(ctype.contains("text/html"))
ctype="text/html";
if(ctype.contains("image/png"))
ctype="image/png";
System.out.println("Content Type: " + ctype);
classifyContentType(ctype);
//Get response code
int statuscode=page.getStatusCode();
System.out.println("Status Code: " + statuscode);
FileWriter pw;
int filesize=page.getContentData().length;
System.out.println("File size is: "+ filesize);
classifyFileSize(filesize);
int linksize=0;
if (page.getParseData() instanceof HtmlParseData) {
HtmlParseData htmlParseData = (HtmlParseData) page.getParseData();
String text = htmlParseData.getText();
String html = htmlParseData.getHtml();
Set<WebURL> links = htmlParseData.getOutgoingUrls();
//System.out.println("Hashcode is "+htmlParseData.hashCode());
System.out.println("Text length: " + text.length());
System.out.println("Html length: " + html.length());
System.out.println("Number of outgoing links: " + links.size());
linksize=links.size();
totalsize+=linksize;
}
try {
File f=new File("/Users/mahima/Desktop/CrawlerResults3/visit_latimes.csv");
if(f.exists()){
pw = new FileWriter(f.getAbsoluteFile(),true);
StringBuilder sb = new StringBuilder();
sb.append(url.replace(',', '_'));
sb.append(',');
sb.append(filesize);
sb.append(',');
sb.append(linksize);
sb.append(',');
sb.append(ctype);
sb.append('\n');
pw.write(sb.toString());
pw.flush();
pw.close();
}
else{
pw = new FileWriter(f);
StringBuilder sb = new StringBuilder();
sb.append("URL");
sb.append(',');
sb.append("Filesize");
sb.append(',');
sb.append("Number of Outgoing links");
sb.append(',');
sb.append("Content type");
sb.append('\n');
sb.append(url.replace(',', '_'));
sb.append(',');
sb.append(filesize);
sb.append(',');
sb.append(linksize);
sb.append(',');
sb.append(ctype);
sb.append('\n');
pw.write(sb.toString());
pw.flush();
pw.close();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("*****STATS*****");
System.out.println("Total links is :"+ totalsize);
System.out.println("Visited is: " + visited);
System.out.println("Suceeded is: " + succeeded);
System.out.println("Aborted is: " + aborted);
System.out.println("Unique URLS inside "+uniqueinside);
System.out.println("Unique URLS outside "+uniqueoutside);
System.out.println("Unique URLS "+unique);
System.out.println("<1KB: "+groupA);
System.out.println("1KB ~<10KB: "+groupB);
System.out.println("10KB ~<100KB: "+groupC);
System.out.println("100KB ~<1MB: "+groupD);
System.out.println(">=1MB: "+groupE);
System.out.println("text/html: "+texthtml);
System.out.println("image/jpeg: "+imagejpeg);
System.out.println("image/gif: "+imagegif);
System.out.println("image/png: "+imagepng);
System.out.println("application/pdf:" + pdf );
for (Entry<Integer, Integer> entry : statusHS.entrySet()) {
System.out.println(entry.getKey() + " = " + entry.getValue());
}
}
private static void classifyContentType(String ctype) {
// TODO Auto-generated method stub
if(ctype.contains("text/html")){
texthtml++;
}
else if(ctype.contains("image/gif")){
imagegif++;
}
else if(ctype.contains("image/jpeg")){
imagejpeg++;
}
else if(ctype.contains("image/png")){
imagepng++;
}
else if(ctype.contains("application/pdf")){
pdf++;
}
}
private static void classifyFileSize(int filesize) {
// TODO Auto-generated method stub
if(filesize < 1024){
groupA++;
}
else if(filesize>=1024 && filesize<10*1024){
groupB++;
}
else if(filesize>=1024*10 && filesize<100*1024){
groupC++;
}
else if(filesize>=100*1024 && filesize<1000*1024){
groupD++;
}
else if(filesize>=1000*1024 ){
groupE++;
}
}
@Override
public void handlePageStatusCode(WebURL webUrl, int statusCode, String statusDescription) {
// Do nothing by default
// Sub-classed can override this to add their custom functionality
statusCodeClassification(statusCode);
FileWriter pw;
try {
File f=new File("/Users/mahima/Desktop/CrawlerResults3/fetch_latimes.csv");
if(f.exists()){
pw = new FileWriter(f.getAbsoluteFile(),true);
StringBuilder sb = new StringBuilder();
sb.append(webUrl.getURL().replace(',', '_'));
sb.append(',');
sb.append(statusCode);
sb.append('\n');
pw.write(sb.toString());
pw.flush();
pw.close();
}
else{
pw = new FileWriter(f);
StringBuilder sb = new StringBuilder();
sb.append("URL");
sb.append(',');
sb.append("Status Code");
sb.append('\n');
sb.append(webUrl.getURL().replace(',', '_'));
sb.append(',');
sb.append(statusCode);
sb.append('\n');
pw.write(sb.toString());
pw.flush();
pw.close();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
super.handlePageStatusCode(webUrl, statusCode, statusDescription);
}
private static void statusCodeClassification(int code) {
// TODO Auto-generated method stub
visited++;
if(statusHS.containsKey(code)){
statusHS.put(code, statusHS.get(code)+1);
}
else{
statusHS.put(code, 1);
}
if(code>=200 && code<300){
succeeded++;
}
if(code>=300 && code<600){
aborted++;
}
}
//public void countFile
}