com.evidon.areweprivateyet.AnalysisUtils.java Source code

Introduction

Here is the source code for com.evidon.areweprivateyet.AnalysisUtils.java

Source

// Copyright 2013 Evidon.  All rights reserved.
// Use of this source code is governed by a Apache License 2.0
// license that can be found in the LICENSE file.

package com.evidon.areweprivateyet;

import java.net.URI;

import com.google.common.net.InternetDomainName;

public class AnalysisUtils {
    /**
     * Will take a url such as http://www.stackoverflow.com and return
     * www.stackoverflow.com
     * 
     * @param url
     * @return
     */
    public static String getHost(String url) {
        if (url == null || url.length() == 0)
            return "";

        int doubleslash = url.indexOf("//");
        if (doubleslash == -1)
            doubleslash = 0;
        else
            doubleslash += 2;

        int end = url.indexOf('/', doubleslash);
        end = end >= 0 ? end : url.length();

        return url.substring(doubleslash, end);
    }

    public static String getGuavaDomain(String url) throws Exception {
        if (url.indexOf("#") > 0) {
            url = url.substring(0, url.indexOf("#"));
        }

        if (url.indexOf("?") > 0) {
            url = url.substring(0, url.indexOf("?"));
        }

        if (url.indexOf(";") > 0) {
            url = url.substring(0, url.indexOf(";"));
        }

        if (url.indexOf("|") > 0) {
            url = url.substring(0, url.indexOf("|"));
        }

        if (url.indexOf("_") > 0) {
            url = url.replaceAll("_", "");
        }

        if (url.indexOf("%") > 0) {
            url = url.replaceAll("%", "");
        }

        // strip port
        if (url.indexOf(":8080") > 0) {
            url = url.replaceAll(":8080", "");
        }

        String host = new URI(url).getHost();
        try {
            InternetDomainName domainName = InternetDomainName.from(host);
            return domainName.topPrivateDomain().name();
        } catch (java.lang.IllegalStateException e) {
            return AnalysisUtils.getBaseDomain(url);
        } catch (java.lang.IllegalArgumentException e) {
            if (url.startsWith("https://")) {
                url = url.substring(7);
            }

            if (url.startsWith("http://")) {
                url = url.substring(7);
            }

            if (url.indexOf("/") > 0) {
                url = url.substring(0, url.indexOf("/"));
            }

            if (url.matches("^(?:[0-9]{1,3}\\.){3}[0-9]{1,3}$")) {
                return url;
            } else {
                throw new Exception();
            }
        }
    }

    /**
     * Based on :
     * http://grepcode.com/file/repository.grepcode.com/java/ext/com.google
     * .android/android/2.3
     * .3_r1/android/webkit/CookieManager.java#CookieManager.getBaseDomain%28java.lang.String%2
     * 9 Get the base domain for a given host or url. E.g. mail.google.com will
     * return google.com
     * 
     * @param host
     * @return
     */
    public static String getBaseDomain(String url) {
        String host = getHost(url);

        int startIndex = 0;
        int nextIndex = host.indexOf('.');
        int lastIndex = host.lastIndexOf('.');
        while (nextIndex < lastIndex) {
            startIndex = nextIndex + 1;
            nextIndex = host.indexOf('.', startIndex);
        }
        if (startIndex > 0) {
            return host.substring(startIndex);
        } else {
            return host;
        }
    }
}