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From Pid...@pidster.com>
Subject Re: Getting the date/time from the client
Date Tue, 11 Jul 2006 11:53:41 GMT
you can get a Locale from the request, and adjust the time accordingly.

Vinu Varghese wrote:
> but that still sets the server date - yes ?
> 
> Pid wrote:
>> write a filter that activates for that url, and get the time just before
>> you doFilter. if you need to, you can pass the date obj as an attribute
>>
>> Date date = new Date();
>> hreq.setAttribute("thisIsTheDate", date);
>> chain.doFilter(hreq, hres);
>>
>>
>>
>> Jon Wingfield wrote:
>>  
>>> The HTTP spec (rfc2616) says clients should only send the Date header
>>> with http messages with body content (POST, PUT) and even then it's
>>> optional.
>>>
>>> Try adding a date string as a parameter on your GET request which your
>>> servlet can then parse from request.getParameter(...).
>>>
>>> One way to do this would be to change your link to a form with a hidden
>>> input field for your date value. Add an onclick/onsubmit javascript
>>> handler to your form button which sets the value of the hidden field to
>>> the current date in a format that your servlet will understand.
>>>
>>> for example:
>>>
>>> function setDate(form) {
>>>   form.dateField.value = new Date().toString();
>>> }
>>>
>>>
>>> Example assumes a hidden form input field with name dateField.
>>>
>>> HTH,
>>>
>>> Jon
>>>
>>> Vinu Varghese wrote:
>>>    
>>>> SK,
>>>> That javascript prints the current client time. But I want the client
>>>> time with the request.
>>>> The scenario is :
>>>>
>>>> I have a index.jsp
>>>>
>>>> <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
>>>>    pageEncoding="ISO-8859-1"%>
>>>> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
>>>> <html>
>>>> <head>
>>>> <meta http-equiv="Content-Type" content="text/html;
>>>> charset=ISO-8859-1">
>>>> <title>Insert title here</title>
>>>> </head>
>>>> <body>
>>>> Client time : <a href="clienttime.htm"> Click</a>
>>>> </body>
>>>> </html>
>>>>
>>>> and  a servlet that can take the client time (Hoping to :-) ) which is
>>>> mapped to 'clienttime.htm'
>>>>
>>>>    protected void doGet(HttpServletRequest request,
>>>> HttpServletResponse response) throws ServletException, IOException {
>>>>              response.setContentType("text/plain");
>>>>              long time = request.getDateHeader("Date"); // Hoping to
>>>> get the client date.
>>>>              PrintWriter out = response.getWriter();
>>>>             out.println("Server time " + new Date());
>>>>              out.println("Client time (long) " + time);
>>>>              out.println("Client time " + new Date(time));
>>>>          }
>>>>
>>>>
>>>> Is there any way to do this (get the client time from the request) ?
>>>> Or Am I trying to do a dumb thing ? ;)
>>>>
>>>> Thanks & Regards
>>>> Vinu
>>>>
>>>>
>>>>
>>>>
>>>> Shinya Koizumi wrote:
>>>>      
>>>>> Vinu
>>>>> Yeah, you are right about it, I can't get getDateHeader working.
>>>>>
>>>>> For the solution one, I have setup like this for jsp and worked.
>>>>>
>>>>> <%@ page session="false" %>
>>>>> <html>
>>>>>    <head>
>>>>>    <meta http-equiv="Content-Type" content="text/html;
>>>>> charset=iso-8859-1">
>>>>>    <title><%= application.getServerInfo() %></title>
>>>>> </head>
>>>>> <body>
>>>>> Current Time:
>>>>> <%
>>>>> out.println("<SCRIPT LANGUAGE=JavaScript>");
>>>>> out.println("var currentTime = new Date();");
>>>>> out.println("document.write(currentTime.toLocaleString());");
>>>>> out.println("</SCRIPT>");
>>>>> out.println("</HEAD>");
>>>>> %>
>>>>> </body>
>>>>> </html>
>>>>>
>>>>> SK
>>>>> ----- Original Message ----- From: "Vinu Varghese" <vinu@x-minds.org>
>>>>> To: "Tomcat Users List" <users@tomcat.apache.org>
>>>>> Sent: Tuesday, July 11, 2006 1:24 AM
>>>>> Subject: Re: Getting the date/time from the client
>>>>>
>>>>>
>>>>>        
>>>>>> Thanks SK,
>>>>>>
>>>>>> I tried the second solution , but request.getDateHeader("Date")
>>>>>> returns -1 .
>>>>>>
>>>>>> Also I didn't understand the first solution ( embed a javascript),
>>>>>> Can u
>>>>>> pls elaborate that.
>>>>>>
>>>>>> Thanks and regards
>>>>>> Vinu
>>>>>>
>>>>>> Shinya Koizumi wrote:
>>>>>>          
>>>>>>> One is to embed javascript in the output
>>>>>>>
>>>>>>> out.println("<HTML><HEAD><title>JavaScriptExample</title>");
>>>>>>>     out.println("<SCRIPT LANGUAGE=JavaScript>");
>>>>>>>     out.println("function back() {");
>>>>>>>     out.println("history.back(-1);");
>>>>>>>     out.println("}");
>>>>>>>     out.println("</SCRIPT>");
>>>>>>>     out.println("</HEAD>");
>>>>>>>
>>>>>>>
>>>>>>> The other solution is to get it from the request header.
>>>>>>>
>>>>>>> protected void doGet(HttpServletRequest request, HttpServletResponse
>>>>>>> response)
>>>>>>>         throws ServletException, IOException {
>>>>>>>     long l = request.getDateHeader("Date");
>>>>>>>     Date d = new Date(l);
>>>>>>>     System.out.println(d);
>>>>>>> }
>>>>>>>
>>>>>>> SK
>>>>>>> ----- Original Message ----- From: "Vinu Varghese"
>>>>>>> <vinu@x-minds.org>
>>>>>>> To: "Tomcat Users List" <users@tomcat.apache.org>
>>>>>>> Sent: Tuesday, July 11, 2006 12:51 AM
>>>>>>> Subject: Getting the date/time from the client
>>>>>>>
>>>>>>>
>>>>>>>            
>>>>>>>> Hi All,
>>>>>>>>
>>>>>>>> I am doing a project in jsp/servlet and tomcat, which requires
to
>>>>>>>> take
>>>>>>>> the client date/time (ie the time of the machine the browser
is
>>>>>>>> running). Is there any way to accomplish this ?
>>>>>>>>
>>>>>>>> Thanks & regards
>>>>>>>> Vinu
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> -- 
>>>>>>>> ........................................
>>>>>>>>
>>>>>>>> Vinu Varghese
>>>>>>>> vinu@x-minds.org
>>>>>>>> www.x-minds.org
>>>>>>>>
>>>>>>>>
>>>>>>>>               
>>>>>>>
>>>>>>> ---------------------------------------------------------------------
>>>>>>>
>>>>>>> To start a new topic, e-mail: users@tomcat.apache.org
>>>>>>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>>>>>>> For additional commands, e-mail: users-help@tomcat.apache.org
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>             
>>>>>> -- 
>>>>>> ........................................
>>>>>>
>>>>>> Vinu Varghese
>>>>>> vinu@x-minds.org
>>>>>> www.x-minds.org
>>>>>>
>>>>>>
>>>>>>           
>>>>>
>>>>> ---------------------------------------------------------------------
>>>>> To start a new topic, e-mail: users@tomcat.apache.org
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>>>>>
>>>>>
>>>>>
>>>>>         
>>>
>>> ---------------------------------------------------------------------
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>>>
>>>
>>>
>>>     
>>
>> ---------------------------------------------------------------------
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>>
>>
>>
>>   
> 

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