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Posted to users@tomcat.apache.org by "Peter H." <co...@hotmail.com> on 2003/04/08 16:02:27 UTC
please try: java renameTo problem apache / tomcat
Hello,
Please try the following...takes only about 5 minutes
Steps to achieve the same general Upload - misbehaviour of Java Servlets
Tomcat and Apache:
1) Download http://www.servlets.com/cos/index.html
or some othe FileUpload enabled ServetRequest.
2) Put the attached servlet to your server.
Change "/export/wwwdoc/" to a apache accessible folder...
Change "/tmp" to some temporary directory
Maybe change test.jpg to another name. (e.g. "/export/wwwdoc/test.jpg")
3) put a proper data in your server.xml or web-inf/web.xml to access the
servlet (servlet is attached)
4) request the servlet. (eg http://127.0.0.1/fileservlet)
You will see a Upload field. Choose a jpg from your harddisk and upload it.
(now be a little bit quick...)
5) request the jpg with apache (eg. http://127.0.0.1/test.jpg)
6) upload the same or a different image with the fileservlet.
(see step 4)
7) after the first or second try you will probably get the same Error as I
and the servlet prints "renameTo failed"
8) Any Ideas? Please help....
If you skip step 5 you can overwrite as often as you like...
if apache / java has enough time between step 4 and 5 it will also
succeed....
This behaviour can be achieved under linux (debian, suse), windows 200x,...
Greetings and Thanks
Peter
FileServlet.java:
####################################################
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
public final class FileServlet
extends HttpServlet {
static public final String TARGET =
"/export/wwwdoc/test.jpg";
public void service(HttpServletRequest req, HttpServletResponse resp)
throws
IOException {
com.oreilly.servlet.MultipartRequest request = new
com.oreilly.servlet.MultipartRequest(req, "/tmp");
File source = null;
if(request.getFile("file") != null) {
source = request.getFile("file");
}
PrintWriter writer = resp.getWriter();
writer.write("<HTML>");
writer.write("<BODY>");
writer.write("<FORM NAME=\"main\"
ACTION=\"http://127.0.0.1/fileservlet\" METHOD=\"post\"
ENCTYPE=\"multipart/form-data\">");
writer.write("<INPUT TYPE=\"file\" NAME=\"file\"/>");
writer.write("<INPUT TYPE=\"submit\" VALUE=\"upload\"/>");
writer.write("<hr>");
if(source != null) {
File target = new File(TARGET);
if(target.exists()) {
writer.write("Target file exists<br>");
if(!target.delete()) {
writer.write("Target file delete failed:" + target +
"<br>");
return;
}
}
if(source.renameTo(target)) {
writer.write("rename succeeded<br>");
}
else {
writer.write("rename failed<br>");
}
}
writer.write("</FORM>");
writer.write("</BODY>");
writer.write("</HTML>");
}
}
EOF##############################################################
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Re: please try: java renameTo problem apache / tomcat
Posted by codedummy <co...@hotmail.com>.
Hello again,
Has somone already tried this? Seems to be a general Bug. I achivied it now
with different file upload servlets and different jvm. Maybe i've to post a
bug report to sun or apache or tomcat or all of them.
Greetings and Thanks
Peter
----- Original Message -----
From: "Peter H." <co...@hotmail.com>
To: <to...@jakarta.apache.org>
Sent: Tuesday, April 08, 2003 4:02 PM
Subject: please try: java renameTo problem apache / tomcat
> Hello,
>
> Please try the following...takes only about 5 minutes
>
> Steps to achieve the same general Upload - misbehaviour of Java Servlets
> Tomcat and Apache:
>
> 1) Download http://www.servlets.com/cos/index.html
> or some othe FileUpload enabled ServetRequest.
>
> 2) Put the attached servlet to your server.
> Change "/export/wwwdoc/" to a apache accessible folder...
> Change "/tmp" to some temporary directory
> Maybe change test.jpg to another name. (e.g. "/export/wwwdoc/test.jpg")
>
> 3) put a proper data in your server.xml or web-inf/web.xml to access the
> servlet (servlet is attached)
>
> 4) request the servlet. (eg http://127.0.0.1/fileservlet)
> You will see a Upload field. Choose a jpg from your harddisk and upload
it.
> (now be a little bit quick...)
>
> 5) request the jpg with apache (eg. http://127.0.0.1/test.jpg)
>
> 6) upload the same or a different image with the fileservlet.
> (see step 4)
>
> 7) after the first or second try you will probably get the same Error as I
> and the servlet prints "renameTo failed"
>
> 8) Any Ideas? Please help....
>
> If you skip step 5 you can overwrite as often as you like...
> if apache / java has enough time between step 4 and 5 it will also
> succeed....
>
> This behaviour can be achieved under linux (debian, suse), windows
200x,...
>
>
> Greetings and Thanks
> Peter
>
>
>
>
>
> FileServlet.java:
> ####################################################
> import java.io.*;
> import javax.servlet.*;
> import javax.servlet.http.*;
> import java.util.*;
>
> public final class FileServlet
> extends HttpServlet {
>
> static public final String TARGET =
> "/export/wwwdoc/test.jpg";
>
> public void service(HttpServletRequest req, HttpServletResponse resp)
> throws
> IOException {
>
> com.oreilly.servlet.MultipartRequest request = new
> com.oreilly.servlet.MultipartRequest(req, "/tmp");
>
> File source = null;
> if(request.getFile("file") != null) {
> source = request.getFile("file");
> }
> PrintWriter writer = resp.getWriter();
> writer.write("<HTML>");
> writer.write("<BODY>");
> writer.write("<FORM NAME=\"main\"
> ACTION=\"http://127.0.0.1/fileservlet\" METHOD=\"post\"
> ENCTYPE=\"multipart/form-data\">");
> writer.write("<INPUT TYPE=\"file\" NAME=\"file\"/>");
> writer.write("<INPUT TYPE=\"submit\" VALUE=\"upload\"/>");
> writer.write("<hr>");
> if(source != null) {
> File target = new File(TARGET);
> if(target.exists()) {
> writer.write("Target file exists<br>");
> if(!target.delete()) {
> writer.write("Target file delete failed:" + target +
> "<br>");
> return;
> }
> }
> if(source.renameTo(target)) {
> writer.write("rename succeeded<br>");
> }
> else {
> writer.write("rename failed<br>");
> }
> }
> writer.write("</FORM>");
> writer.write("</BODY>");
> writer.write("</HTML>");
> }
> }
> EOF##############################################################
>
>
>
>
>
> _________________________________________________________________
> MSN Hotmail - Absolut kostenfrei! Der weltweit größte E-Mail-Anbieter im
> Netz: http://www.msn.de/hotmail
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tomcat-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: tomcat-user-help@jakarta.apache.org
>
>
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