Applet read file on web

Question

Can applet read file on web?
I try to write an applet that read the file on web i.e. http://lcoalhost:8080/test.txt
The HTML page contain the applet is placed on http://localhost:8080
URI URItemp= new URI("file:///test.txt");
File Filetemp = new File(URItemp);
BufferReader in = new BufferReader(new InputStreamReader(new FileInputStream(Filetemp)));the above cannot work
Error : access denied (java.io.FilePermission \test.txt read)
And then I add
FilePermission fp = new java.io.FilePermission("file:///test.txt", "read");still cannot work
Cound anyone tell me that is possible to do what I want to do?
If yes, how?
Thanks!!

Answer 1

Applets are downloaded from web servers and execute on the client machine.
Therefore they have no access to the web server file system, signed or not.
They could have access to the client file system (the machine where they run),
but for security reasons only signed applets have this privilege.
So to answer your question, you sign if you want to access client files.
To access web server files, you don't need to sign the applet, but you need
to provide some method of accessing files remotely, for instance:
- Files published for the web can be read using HTTP
- Files can be read or writen with the help of an FTP server on the same machine as the web server
- A servlet running on the HTTP server can collaborate with your applet to exchange files