<%@ page contentType="text/html; charset=utf-8" %>
<%@ page import="java.util.*" %>
<%@ page import="java.io.*" %>
<%@ page import="java.text.SimpleDateFormat" %>
<%
/**
 * factory.wplushttphead API를 통해서 호출되는 웹 서비스 모듈
 * Test URL: http://127.0.0.1:8080/xframe5/template/HTML5/UTIL/WEBPLUS/webplus_httphead.jsp?type=screen&url=/1.xml
 *
 * @param type url에 대한 파일 구분 ("screen"/"picklist")
 * @param url xFrame5에서 사용하는 파일 URL 정보 ("/" 부터 시작, 예시: /BIZ/007190.xml)
 
 * @returns {string} Format : FileByteSize^FileLastModifyGMTDateTime^FileLastModifyLocalDateTime
 *		-1 : file not exist 
 *		-2 : error 
 *		-3 : invalid paramter
 *	 	 n : file byte size 
 */

out.clearBuffer();

String fileType = "";		// screen/picklist
String fileUrl = "";
	
try {
	System.out.println("webplus_httphead> start ===============================================");

	// Set CORS HTTP Header Start
	response.setHeader("Access-Control-Allow-Credentials", "true");
	response.setHeader("Access-Control-Allow-Headers", "X-Requested-With");
	
	// a String containing the value of the requested header, or null if the request does not have a header of that name
	String origin = request.getHeader("Origin");
	System.out.println("request origin = " + origin);
	if (origin == null) { response.setHeader("Access-Control-Allow-Origin", "*"); }
	else { response.setHeader("Access-Control-Allow-Origin", origin); }
	// Set CORS HTTP Header End
	
	fileType = request.getParameter("type");		// screen/picklist
	fileUrl = request.getParameter("url");		
	
	System.out.println("webplus_httphead> fileType = [" + fileType + "], fileUrl = [" + fileUrl + "]");
	
	if (fileType == null || fileUrl == null) { 
    	out.println("{");
    	out.println("\"result\" : \"" + "0" + "\",");
    	out.println("\"err_code\" : \"" + "1" + "\",");
    	out.println("\"err_msg\" : \"" + "invalid parameter value" + "\",");
    	out.println("\"file_type\" : \"" + fileType + "\",");
    	out.println("\"file_url\" : \"" + fileUrl + "\",");
    	out.println("\"file_size\" : \"" + "0" + "\",");
    	out.println("\"gmt_time\" : \"" + "" + "\",");
    	out.println("\"local_time\" : \"" + "" + "\"");
    	out.println("}");	
    	return;
	}
	
	// TODO: 프로젝트 환경에서 변경해야 함.
	String 	fileAbsolutePath = "D:\\SOFTBASE\\HTML\\xframe5\\project\\terminal\\";
	
	fileAbsolutePath += fileType + fileUrl;
	
	System.out.println("webplus_httphead> fileAbsolutePath = [" + fileAbsolutePath + "]");

	File file = new File(fileAbsolutePath);
    if (file.exists() == false) {
    	out.println("{");
    	out.println("\"result\" : \"" + "0" + "\",");
    	out.println("\"err_code\" : \"" + "2" + "\",");
    	out.println("\"err_msg\" : \"" + "file not exist" + "\",");
    	out.println("\"file_type\" : \"" + fileType + "\",");
    	out.println("\"file_url\" : \"" + fileUrl + "\",");
    	out.println("\"file_size\" : \"" + "0" + "\",");
    	out.println("\"gmt_time\" : \"" + "" + "\",");
    	out.println("\"local_time\" : \"" + "" + "\"");
    	out.println("}");       	
	}
	else {	
        long fileSize = file.length();
        
    	// A long value representing the time the file was last modified, measured in milliseconds 
    	// since the epoch (00:00:00 GMT, January 1, 1970), or 0L if the file does not exist or if an I/O error occurs	
    	long 			lLocalDateTime = file.lastModified();
    	Calendar 		calendar = Calendar.getInstance();
        
    	SimpleDateFormat format = new SimpleDateFormat();
    	format.applyPattern("yyyyMMddHHmmss");
    	
    	// lFileModifyDateTime: the new time in UTC milliseconds from the epoch.
    	calendar.setTimeInMillis(lLocalDateTime);
    	String fileLocaDateTime = format.format(calendar.getTime());
    	
    	// Local Time -> GMT Time
   		TimeZone timeZone = TimeZone.getDefault();
   	    int offset = timeZone.getOffset(lLocalDateTime); // The offset includes daylight savings time
   	    long lUTCDateTime = lLocalDateTime - offset;
   		calendar.setTimeInMillis(lUTCDateTime);
		String fileGmtDateTime = format.format(calendar.getTime());
		
		System.out.println("webplus_httphead> Size = " + fileSize + ", GMT = " + fileGmtDateTime + ", Local = " + fileLocaDateTime);
		
    	out.println("{");
    	out.println("\"result\" : \"" + "1" + "\",");
    	out.println("\"err_code\" : \"" + "0" + "\",");
    	out.println("\"err_msg\" : \"" + "" + "\",");
    	out.println("\"file_type\" : \"" + fileType + "\",");
    	out.println("\"file_url\" : \"" + fileUrl + "\",");
    	out.println("\"file_size\" : \"" + fileSize + "\",");
    	out.println("\"gmt_time\" : \"" + fileGmtDateTime + "\",");
    	out.println("\"local_time\" : \"" + fileLocaDateTime + "\"");
    	out.println("}");        
	}
       
	System.out.println("webplus_httphead> success end ===============================================");
} 
catch (Exception e) {
    System.out.println("webplus_httphead> " + e.getMessage());
    e.printStackTrace();
    
	out.println("{");
	out.println("\"result\" : \"" + "0" + "\",");
	out.println("\"err_code\" : \"" + "9" + "\",");
	out.println("\"err_msg\" : \"" + e.getMessage() + "\",");
	out.println("\"file_type\" : \"" + fileType + "\",");
	out.println("\"file_url\" : \"" + fileUrl + "\",");
	out.println("\"file_size\" : \"" + "0" + "\",");
	out.println("\"gmt_time\" : \"" + "" + "\",");
	out.println("\"local_time\" : \"" + "" + "\"");
	out.println("}");
	
    System.out.println("webplus_httphead> error end ==============================================="); 	
}	
%>