net.fenyo.mail4hotspot.web.BrowserServlet.java Source code

Introduction

Here is the source code for net.fenyo.mail4hotspot.web.BrowserServlet.java

Source

// (c) Alexandre Fenyo 2012, 2013, 2014, 2015, 2016 - alex@fenyo.net - http://fenyo.net - GPLv3 licensed

package net.fenyo.mail4hotspot.web;

import java.io.*;
import java.net.*;
import java.util.*;

import javax.servlet.http.*;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

// ex de nom de domaine accentu : cral.eu
// http://localhost/mail4hotspot/browser/http/c%C3%A9r%C3%A9al.eu/80/partie2?tata=truc&tata=troc
// http://localhost:80/mail4hotspot/browser/http/craltest.eu/80/partie2?tata=truc&tata=trc

public class BrowserServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
    protected final Log log = LogFactory.getLog(getClass());

    @Override
    protected void doGet(final HttpServletRequest request, final HttpServletResponse response) throws IOException {
        // debug informations
        log.debug("doGet");
        log.debug("context path: " + request.getContextPath());
        log.debug("character encoding: " + request.getCharacterEncoding());
        log.debug("content length: " + request.getContentLength());
        log.debug("content type: " + request.getContentType());
        log.debug("local addr: " + request.getLocalAddr());
        log.debug("local name: " + request.getLocalName());
        log.debug("local port: " + request.getLocalPort());
        log.debug("method: " + request.getMethod());
        log.debug("path info: " + request.getPathInfo());
        log.debug("path translated: " + request.getPathTranslated());
        log.debug("protocol: " + request.getProtocol());
        log.debug("query string: " + request.getQueryString());
        log.debug("requested session id: " + request.getRequestedSessionId());
        log.debug("Host header: " + request.getServerName());
        log.debug("servlet path: " + request.getServletPath());
        log.debug("request URI: " + request.getRequestURI());
        @SuppressWarnings("unchecked")
        final Enumeration<String> header_names = request.getHeaderNames();
        while (header_names.hasMoreElements()) {
            final String header_name = header_names.nextElement();
            log.debug("header name: " + header_name);
            @SuppressWarnings("unchecked")
            final Enumeration<String> header_values = request.getHeaders(header_name);
            while (header_values.hasMoreElements())
                log.debug("  " + header_name + " => " + header_values.nextElement());
        }
        if (request.getCookies() != null)
            for (Cookie cookie : request.getCookies()) {
                log.debug("cookie:");
                log.debug("cookie comment: " + cookie.getComment());
                log.debug("cookie domain: " + cookie.getDomain());
                log.debug("cookie max age: " + cookie.getMaxAge());
                log.debug("cookie name: " + cookie.getName());
                log.debug("cookie path: " + cookie.getPath());
                log.debug("cookie value: " + cookie.getValue());
                log.debug("cookie version: " + cookie.getVersion());
                log.debug("cookie secure: " + cookie.getSecure());
            }
        @SuppressWarnings("unchecked")
        final Enumeration<String> parameter_names = request.getParameterNames();
        while (parameter_names.hasMoreElements()) {
            final String parameter_name = parameter_names.nextElement();
            log.debug("parameter name: " + parameter_name);
            final String[] parameter_values = request.getParameterValues(parameter_name);
            for (final String parameter_value : parameter_values)
                log.debug("  " + parameter_name + " => " + parameter_value);
        }

        // parse request

        String target_scheme = null;
        String target_host;
        int target_port;

        // request.getPathInfo() is url decoded
        final String[] path_info_parts = request.getPathInfo().split("/");
        if (path_info_parts.length >= 2)
            target_scheme = path_info_parts[1];
        if (path_info_parts.length >= 3) {
            target_host = path_info_parts[2];
            try {
                if (path_info_parts.length >= 4)
                    target_port = new Integer(path_info_parts[3]);
                else
                    target_port = 80;
            } catch (final NumberFormatException ex) {
                log.warn(ex);
                target_port = 80;
            }
        } else {
            target_scheme = "http";
            target_host = "www.google.com";
            target_port = 80;
        }

        log.debug("remote URL: " + target_scheme + "://" + target_host + ":" + target_port);

        // create forwarding request

        final URL target_url = new URL(target_scheme + "://" + target_host + ":" + target_port);
        final HttpURLConnection target_connection = (HttpURLConnection) target_url.openConnection();

        // be transparent for accept-language headers
        @SuppressWarnings("unchecked")
        final Enumeration<String> accepted_languages = request.getHeaders("accept-language");
        while (accepted_languages.hasMoreElements())
            target_connection.setRequestProperty("Accept-Language", accepted_languages.nextElement());

        // be transparent for accepted headers
        @SuppressWarnings("unchecked")
        final Enumeration<String> accepted_content = request.getHeaders("accept");
        while (accepted_content.hasMoreElements())
            target_connection.setRequestProperty("Accept", accepted_content.nextElement());

    }
}