Question

Including files in a jsp from different machine

Asked by: priyha

Hi all,
   The JSP pages i am developing is accessing different files from different locations and displaying them based on certain conditions.
  I am using tomcat server. I need to access some files from within the tomcat webapps directory which i do by jsp:include tag( which takes a relative url). But some of the other files are to be accessed from other machines. jsp:include cannot be used for this. So, I used c:import tag library. Code looks like this:

<%@ page language="java" contentType="text/html"%>
<%@ taglib prefix="c"uri="http://java.sun.com/jstl/core" %>
<html>
<body>

<c:import url="initial.html" />            
<c:import url="\\d10601\c$\try.html" />

</body>
</html>
 
The first c:import works because it is in the same directory as the jsp. But the second one doen't work. Can anyone explain why the second one is not working?
  Please let me know how i can access files from different machines in my jsp.

Thanks,
Priyha.

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Asked On
2003-07-14 at 13:49:09ID20678304
Tags

accessing

,

url

,

from

,

different

,

file

Topics

Java Server Pages (JSP)

,

Java Standard Tag Library (JSTL) & Server Tags

,

Server Side Includes (SSI)

Participating Experts
3
Points
30
Comments
6

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Answers

 

by: abuimadPosted on 2003-07-14 at 18:18:53ID: 8921867

If the file is outside of the web application, and is not under another web application, then you need to use a File input stream to read it.
Try this:

<%
// Tomcat must be running under a user account that has access permissions to the \\d10601\c$ share
// don't forget to catch IO Exceptions

java.io.FileInputStream in = new FileInputStream( "\\\\d10601\\c$\\try.html" );
byte[] fileBytes = new byte[ in.available() ];
in.read( fileBytes );
String fileString = new String( fileBytes );
%>

Of course, you can use the java.io.File and FileReader classes for cleaner code.

Be careful, though, doinf this is really not a good idea because if the d10601 machine is powered off or removed from the network, your code is not going to work.

Good luck

 

by: polurucPosted on 2003-07-15 at 01:20:10ID: 8923477

don't understand ur need, why r u placing somefiles on a different machine? is that a different web application running on a different machine??
first of all u can't include a file that is not under ur web application's root directory. if the file that u want to include is a static file like html or even a jsp/servlet/asp..etc then u can't include that file, u can get the output of that jsp/servlet by making a http request on ur own using classes like URL, URLConnection..etc.
Give us some more details about ur actual situation and need for including the file from diff machine, so that we can give some meaningful suggestion.

Note: using FileReader..etc classes for including is a wrong approach, coz u will send the jsp/servlet code to the user not the output of that.

Chandra
GamCom Solutions,
http://www.gamcom.com
(+44(0)208-838-5441

 

by: priyhaPosted on 2003-07-15 at 06:33:19ID: 8925246

Here's my situation. I am developing a web page( Email viewer) where i need to display an email which is made of different hmtl  files like step1.html, step2.html, etc...till step 10.  All these htmls reside in a server under my web application directory. Users will access this file to view the email. The email displayed will be different for different conditions which the user gives using select boxes and checkboxes. For eg, if the product is A and the operating system is Windows, a particular email is displayed,if its unix, a different email is displayed, etc.
   The user sometimes have to modify a part of the email, ie , lets say step4.html and want to see how it looks with the changes. He has the new modified html file in his local machine. If he selects a checkbox in the webpage saying "use the local file" and enters his machine name and directory where to look, then my jsp will have to look into his local machine and take that html file and display it, instead of taking the html from the web application directories in the tomcat server. So files are not under the web apps directory, its in a different machine.
   The problem is the jsp's and html files reside in a different server. and it has to access some html files from different machines. Please let me know how to do this. I tried it with the c:import tag, but still not working, its giving an error like this:
javax.servlet.ServletException: Problem accessing the absolute URL "file://d10601\c$\try.html". java.net.ConnectException: Connection refused: connect
      at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:463)
      at org.apache.jsp.test_0005fcimport$jsp._jspService(test_0005fcimport$jsp.java:262)
      at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
etc....

<%@ page language="java" contentType="text/html" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
<html>
<body>

<c:import url="AV_common_step5_nonmime-mime.html" />            
<c:import url="\\d10601\c$\try.html" />
<c:import url="file://d10601\\c$\\try.html" />

</body>
</html>

I also tried this   <c:import url="http://google.com" />

same error is coming, please help me how to solve this problem.

Thanks,
Priyha

 

by: polurucPosted on 2003-07-15 at 08:12:39ID: 8926188

Hi,
For your case, i feel its all static html files the you have to include to the user. The best option for this is, when the user selects a checkbox in the webpage saying "use the local file" and enters his machine name and directory where to look then best is to upload this file to the server (lets say into a folder "usermails" and then include this.

the second option is to blindly read the content using some FileInputStream or FileReader and print it out to the user. But it's allways discouraged to go with this approach, coz it makes ur application coupled with external systems and there is allways a possibility that some systems might go down..etc.

u can get some upload componants( jsp or servlets easily on the web) and better go with the 1st appoach.

If u need any help, let me kno....

Ragards,
Chandra

 

by: girionisPosted on 2004-02-02 at 02:26:49ID: 10251407

No comment has been added lately, so it's time to clean up this TA.
I will leave the following recommendation for this question in the Cleanup topic area:

Accept: abuimad {http:#8921867}

Please leave any comments here within the next seven days.
PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!

girionis
EE Cleanup Volunteer

20120131-EE-VQP-002

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