I want to redircet to another page by meta refresh, but only after all resources were loaded. Any ideas how to archive that?
SOLUTION:
I combined both ways, the meta refresh and the jQuery way.
<%# taglib prefix="c" uri="http://java.sun.com/jstl/core_rt" %>
<%# taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%# taglib prefix="pos" uri="/WEB-INF/tld/pos.tld" %>
<%# taglib prefix="template" tagdir="/WEB-INF/tags" %>
<%# page pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<meta name="description" content="" />
<meta http-equiv="Refresh" content="1; url=${callback}/" />
<script type="text/javascript" src="/JS/pos_js/jquery-latest.js"></script>
</head>
<body>
<script>
$(document).ready(function() {
window.location = '${callback}';
});
</script>
</body>
</html>
With this way, for me, it is possible to redirect if the document in fully loaded and if JS is deactivated the meta refresh will throw the user to the callback page.
Only real way of doing it is:
<meta http-equiv="Refresh" content="1500; url=http://www.example.com/" />
That will wait 1.5 seconds for the page to load... not ideal, but without JS you'll be lucky!
edit: What about an iFramed option?
You could do this via jQuery using the $(document).load() function.
$(document).load(function() {
window.location = 'http://new.url.com';
});
Related
I am developing a college project and i will try to explain my problem using a small example.
Below there are 3 jsp pages (index.jsp , test.jsp , logged.jsp) and i want that if the user try to access logged.jsp directly by entering url http://localhost:8080/sessionTest/logged.jsp then he will be redirected to index.jsp.
index.jsp
<%#page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<form action ="test.jsp" method="post">
enter user id :<input type="text" name="user">
Enter password:<input type="password" name="pass">
<input type="submit" value="submit">
</form>
</body>
</html>
test.jsp
<%#page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<%
String user= request.getParameter("user");
String pass= request.getParameter("pass");
if(user.equals("snow")&& pass.equals("123"))
{
session.setAttribute("user", user);
RequestDispatcher r = request.getRequestDispatcher("logged.jsp");
r.forward(request, response);
}
else {
out.println("wrong pass or id");
}
%>
</body>
</html>
logged.jsp
<%#page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<% session = request.getSession(false);
if(session==null)
{
response.sendRedirect("index.jsp");
}
else{
out.println("welcome its old session");
}
%>
</body>
</html>
please , help me with some code and explain how it works
Try this one may be it helps you :
<%
HttpSession session = request.getSession();
if(null!=session.getAttribute("username")){
out.write("username is "+session.getAttribute("username").toString());
}
else{
response.sendRedirect("/index.jsp");
}
%>
I have the following JSP :
<%
String Target_Url=request.getSession().getAttribute("Target_Url").toString();
Target_Url="http://www.yahoo.com";
%>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script type="text/javascript">
if (window.top.location != window.location)
{
window.top.location.href=window.location.href;
}
</script>
<META http-equiv="refresh" content="0;URL=${Target_Url}">
</head>
...
</html>
It's inside a frame, and should redirect to the top level location, but it's not doing that, it keeps redirect to it self, but if I hard code it like the following, it works :
<META http-equiv="refresh" content="0;URL=http://www.yahoo.com">
I guess : content="0;URL=${Target_Url}" is incorrect, what's the correct format ?
Correct format:
<META http-equiv="refresh" content="0;URL=<%=Target_Url%>">
I'm creating an ASP.net website and I need to use a VBScript to handle my code using a function so that every time i call that function it writes that code in html.
Something like this:
function heading(tite){
<html>
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso8859-1">
<title><%= title %></title>
</head>
}
How can i do this?
Thanks
<% sub heading(titl) %>
<html><head>your html here<% =titl %>
</head>
<% end sub %>
</html>
I am trying to insert image in mysql database & retrive it and displayimg it another jsp page but while retriving its not displaying image in browser instead it started download can you help me in this. . , and my code is . .,
Addimage.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" "http://www.w3.org /TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form action="AddImg.jsp" method="post">
Image<input type="file" name="file" value="upload" /><br>
<input type="submit" value="Add"/>
</form>
</body>
</html>`
and AddImg.jsp
<%#page import="java.sql.*" %>
<%#page import="java.io.*" %>
<%
Connection con;
PreparedStatement stmt;
ResultSet rs;
byte[] b=null;
//int f;
%>
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org /TR/html4/loose.dtd">
<%
String filenm=request.getParameter("file");
String f="C:/visualverify02/limitedimages/"+filenm;
File file=new File(f);
FileInputStream fin =new FileInputStream(file);
Class.forName("com.mysql.jdbc.Driver");
con=DriverManager.getConnection("jdbc:mysql://localhost:3306/imgdb","root","password");
stmt=con.prepareStatement("insert into img values(?)");
//String str="insert into img values ('"+file2+"')";
stmt.setBinaryStream(1,(InputStream) fin, (int) (file.length()));
int count=stmt.executeUpdate();
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%
if(count>0)
{
out.println("img inserted");
rs = stmt.executeQuery("SELECT * FROM img ");
int i = 1;
if(rs.next()) {
Blob len1 = rs.getBlob("imgfile");
//int len = (int)len1.length();
b = len1.getBytes(1,(int)len1.length());
}else{out.println("Img not selected");}
response.setContentType("image/jpg");
OutputStream o=response.getOutputStream();
%>
<table>
<tr><td><%o.write(b); %></td></tr>
<%
o.flush();
o.close();
}
else{
out.println("Not inserted");
}
%>
</table>
</body>
</html>
First of all I think it's bad practice to have scriptlets in your jsp. I would suggest use at least a http servlet as a controller that deals with storing the image.
Secondly, the way the code is written you are not writing an image to a html page, but to a file, that will trigger downloading that file. To do what you want to archive your contenttype should be "text/html" and the output should be a html with an image tag like described in how to show byte data in an img tag
I have the following JSP page:
<%#page import="com.myPath.JSPHelper"%>
<%#page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<meta name="keywords" content="${jspHelper.getKeywordsMetatag()}">
</head>
<body>
<%
JSPHelper jspHelper = new JSPHelper();
jspHelper.loadData(request.getAttribute("id").toString()); // load data from database
%>
<script type="text/javascript">
<%=jspHelper.getScriptContent()%>
</script>
</body>
</html>
What I'm trying to do is to fill in the contents of the keywords meta tag using a function getKeywordsMetatag() that is defined in a companion class `JSPHelper.java'.
But this is not working, I get the following error:
The function getKeywordsMetatag must be used with a prefix when a default namespace is not specified
I'm new to JSP so I've tried many things without success.
What am I doing wrong here?
What really bothers me is that the function getScriptContent() perfectly works, dumping javascript code in the html page. Why does getScriptContent() work but not getKeywordsMetatag()?
Thanks!
I would move the declaration of jspHelper up above its first use. I would also drop the ${} syntax but that might not be necessary.
<%#page import="com.myPath.JSPHelper"%>
<%#page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%
JSPHelper jspHelper = new JSPHelper();
%>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<meta name="keywords" content="<%=jspHelper.getKeywordsMetatag()%>">
</head>
<body>
<%
jspHelper.loadData(request.getAttribute("id").toString()); // load data from database
%>
<script type="text/javascript">
<%=jspHelper.getScriptContent()%>
</script>
</body>
</html>