/*
 *  Copyright (c) 2002, Tayeb Lemlouma
 *  All rights reserved.
 *  
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *  
 *  Redistributions of source code must retain the above copyright
 *  notice, this list of conditions and the following disclaimer. 
 *  Redistributions in binary form must reproduce the above copyright
 *  notice, this list of conditions and the following disclaimer in the
 *  documentation and/or other materials provided with the distribution. 
 *  Neither the name of the Opera Project (INRIA Rhône Alpes) nor the names
 *  of its contributors may be used to endorse or promote products derived
 *  from this software without specific prior written permission.
 *   
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 *  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 *  EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
import java.io.*;
import java.lang.String;
import java.net.*;

public class log2XML {
    
    /**
    * Replace a char by a string of char in the input string
    *
    *@param str1 the input string
    *@param str2 the tring used to replace the input character
    *@param c the character to be replaced
    */
    public String replaceString(String str1, String str2, char c){
	    String str="";
	    for(int i=0; i<str1.length(); i++) if (str1.charAt(i)==c) str+=str2; else str+=str1.charAt(i);
	    return str;
    }//replaceString

    /**
    * Build a part of the XML data
    *
    *@param	out		the output stream writer of the XML file
    *@param	IP		the string of the IP address
    *@param	accessDate	the string of the access date
    *@param	request		the string of the visitor request
    *@param	statusCode	the string of the status code
    *@param	fileSize	the string of the file size
    *@param	referrer	the string of the referrer
    *@param	userAgent	the string of the  user agent
    */
    public void buildXMLData(OutputStreamWriter out, String IP, String accessDate, String request, String statusCode, String fileSize, String referrer, String userAgent){
    	try{
    		out.write("<Visitor IP=\""+IP+"\" accessDate=\""+accessDate+"\" request=\""+request+"\" statusCode=\""+statusCode+"\" fileSize=\""+fileSize+"\" referrer=\""+referrer+"\" userAgent=\""+userAgent+"\" />\r\n");
    		
    		
	}catch(Exception e){
		System.err.println("can't write the XML file: "+e);
	}
    }//end buildXMLData

    /**
    * Extract the user agent information
    *
    *@param logLine a line of the server log
    */
    public String extractUserAgent(String logLine){
	    String userAgent="";
	    int i,j,k,l,m;
	    for(i=0; logLine.charAt(i)!=' ' && i<logLine.length(); i++);
	    i+=35; //skip "- - ["
	    for(j=i; logLine.charAt(j)!='"' && j<logLine.length(); j++);
	    j+=2;//skip " "
	    for(k=j; logLine.charAt(k)!=' ' && k<logLine.length(); k++);
	    k+=1;//skip " "
	    for(l=k; logLine.charAt(l)!=' ' && l<logLine.length(); l++);
	    l+=2;//skip ' "'
	    for(m=l; logLine.charAt(m)!='"' && m<logLine.length(); m++);
	    m+=3;//skip ' "'
	    for(int n=m; logLine.charAt(n)!='"' && n<logLine.length(); n++){userAgent+=logLine.charAt(n);}	
	    return userAgent;
    }//end extractUserAgent

    /**
    * Extract the referrer information
    *
    *@param logLine a line of the server log
    */
    public String extractReferrer(String logLine){
	    String referrer="";
	    int i,j,k,l;
	    for(i=0; logLine.charAt(i)!=' ' && i<logLine.length(); i++);
	    i+=35; //skip "- - ["
	    for(j=i; logLine.charAt(j)!='"' && j<logLine.length(); j++);
	    j+=2;//skip " "
	    for(k=j; logLine.charAt(k)!=' ' && k<logLine.length(); k++);
	    k+=1;//skip " "
	    for(l=k; logLine.charAt(l)!=' ' && l<logLine.length(); l++);
	    l+=2;//skip ' "'
	    for(int m=l; logLine.charAt(m)!='"' && m<logLine.length(); m++){referrer+=logLine.charAt(m);}	 	    
	    return referrer;
    }//end extractUserAgent
    
    /**
    * Extract the file size information
    *
    *@param logLine a line of the server log
    */
    public String extractFileSize(String logLine){
	    String fileSize="";
	    int i,j,k;
	    for(i=0; logLine.charAt(i)!=' ' && i<logLine.length(); i++);
	    i+=35; //skip "- - ["
	    for(j=i; logLine.charAt(j)!='"' && j<logLine.length(); j++);
	    j+=2;//skip " "
	    for(k=j; logLine.charAt(k)!=' ' && k<logLine.length(); k++);
	    k+=1;
	    for(int l=k; logLine.charAt(l)!=' ' && l<logLine.length(); l++){fileSize+=logLine.charAt(l);}	 	    
	    return fileSize;
    }//end extractUserAgent
    
    /**
    * Extract the status code information
    *
    *@param logLine a line of the server log
    */
    public String extractStatusCode(String logLine){
	    String statusCode="";
	    int i,j;
	    for(i=0; logLine.charAt(i)!=' ' && i<logLine.length(); i++);
	    i+=35; //skip "- - ["
	    for(j=i; logLine.charAt(j)!='"' && j<logLine.length(); j++);
	    j+=2;//skip " "
	    for(int k=j; logLine.charAt(k)!=' ' && k<logLine.length(); k++){statusCode+=logLine.charAt(k);}	 	    
	    return statusCode;
    }//end extractUserAgent

    /**
    * Extract the request information
    *
    *@param logLine a line of the server log
    */
    public String extractRequest(String logLine){
	    String request="";
	    int i;
	    for(i=0; logLine.charAt(i)!=' ' && i<logLine.length(); i++);
	    i+=35; //skip "- - ["
	    for(int j=i; logLine.charAt(j)!='"' && j<logLine.length(); j++){request+=logLine.charAt(j);}	    
	    return request;

    }//end extractRequest

    /**
    * Exract the date information
    *
    *@param logLine a line of the server log
    */
    public String extractDate(String logLine){
	    String extractDate="";
	    int i;
	    for(i=0; logLine.charAt(i)!=' ' && i<logLine.length(); i++);
	    i+=6; //skip "- - ["
	    for(int j=i; logLine.charAt(j)!=']' && j<logLine.length(); j++){extractDate+=logLine.charAt(j);}
	    return extractDate;
    }//end extractDate

    /**
    * Extract the IP information
    *
    *@param logLine a line of the server log
    */
    public String extractIP(String logLine){

	    String extractIP="";
	    for(int i=0; logLine.charAt(i)!=' ' && i<logLine.length(); i++) {extractIP+=logLine.charAt(i);}
	    return extractIP;

    }//end extractIP

    /**
    * Create the log in XML
    * Format: 
    * <?xml version=\"1.0\"?>
    * <ServerLog>
    * 	<Visitor IP="4.33.55.30" accessDate="30/Jun/2002:04:02:27 +0200" request="GET /people/Tayeb.Lemlouma/NegotiationSchema/index.htm HTTP/1.0" statusCode="200" fileSize="2674" referrer="-" userAgent="Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0) Fetch API Request" />
    * 	<Visitor .. />
    * 	...
    * 	<Visitor .. />
    * </ServerLog>
    *
    *@param	logFileName	The file name of the log. 
    *@param	xmlFileName	The file name of the output XML file.
    *@param	serverType	The type of the server that determines the format of the log
    */
    public log2XML(String logFileName, String xmlFileName, String serverType){
		try {
			String logLine;
			String IP;
			String accessDate;
			String request;
			String statusCode;
			String fileSize;
			String referrer;
			String userAgent;
			if(serverType.equals("Apache/1.3.20")){
		      		OutputStreamWriter out; 
		      		FileOutputStream fout = new FileOutputStream(xmlFileName);
		      		out = new OutputStreamWriter(fout, "ISO-8859-1");
		      		
		      		FileReader fr = new FileReader(logFileName);
				BufferedReader br = new BufferedReader(fr);
				
				out.write("<?xml version=\"1.0\"?>\r\n");
				out.write("<ServerLog>\r\n");
				
				while ((logLine=br.readLine())!=null){
					//System.out.println(logLine);
					IP = extractIP(logLine);
					//System.out.println("IP: '"+IP+"'");
					accessDate = extractDate(logLine);
					//System.out.println("accessDate: '"+accessDate+"'");
					request = extractRequest(logLine);
					//System.out.println("request: '"+request+"'");
					statusCode = extractStatusCode(logLine);
					//System.out.println("statusCode: '"+statusCode+"'");
					fileSize = extractFileSize(logLine);
					//System.out.println("fileSize: '"+fileSize+"'");
					referrer = extractReferrer(logLine);
					//System.out.println("referrer: "+referrer);
					userAgent = extractUserAgent(logLine);
					//System.out.println("userAgent: '"+userAgent+"'");
					request = replaceString(request,"&amp;", '&');
					referrer = replaceString(referrer, "&amp;", '&'); 
					//System.out.println((InetAddress.getByName(IP)).toString());
					buildXMLData(out, IP, accessDate, request,statusCode, fileSize, referrer, userAgent);
				}// end while
				
				out.write("</ServerLog>\r\n");
		      		out.close();
		      	}else{System.err.println("The server log type: "+serverType+"is not yet supported");}
		
		}catch(Exception e){
		
		}//end catch
	}//end public

	/**
	* Written to test the log2XML method
	*/
	public static void main(String[] args) throws Exception {
		System.out.println("XML file creating...");
		new log2XML(args[0],"output.xml", "Apache/1.3.20");
		System.out.println("XML file created.");
	}//end main
}