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I am using following line to open a file in new Tab for browser
Anchor tag :
<a id="view" target="_blank" class="btn btn-info btn-xs" href="<%=rs.getString(2)%>>
Where rs.getString(2) represents the file to be opened
It works Correctly , but the problem is it displays the fully qualified path of file , (where the file is stored on) server
I want to hide the URL for better security, rather I want to display in URL only "Attached-Proof" as a String
Is it possible, any idea?
779
Here's a very much simplified solution. The idea is to do a form post rather than a simple GET.
<head>
<script type="text/javascript">
function openFile(fileName) {
document.getElementById('filename').value = fileName;
document.getElementById('viewform').submit();
}
</script>
</head>
<body>
<a id="view" class="btn btn-info btn-xs" href="javascript:openFile('<%=rs.getString(2)%>');">click me</a>
<form id="viewform" action="Attached-Proof" target="_blank" method="post">
<input type="hidden" name="filename" id="filename" value=""/>
</form>
</body>
A plain old form post is still going to show the file path. To prevent that, on the server side, you define a resource to read the file and write it back to the response. A simple servlet can do the job.
web.xml:
<servlet>
<servlet-name>view-file</servlet-name>
<servlet-class>com.example.ViewFileServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>view-file</servlet-name>
<url-pattern>/Attached-Proof</url-pattern>
</servlet-mapping>
And the servlet would look something like this:
package com.example;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ViewFileServlet extends HttpServlet
{
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
response.setContentType("application/pdf");
File file = new File(getServletContext().getRealPath(request.getParameter("filename")));
InputStream is = null;
try {
is = new FileInputStream(file);
byte[] buffer = new byte[1024];
int count;
while ((count = is.read(buffer)) > 0)
{
response.getOutputStream().write(buffer, 0, count);
}
} finally {
if (is != null) is.close();
}
}
}
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