Article View: borland.public.jbuilder.java.language
Article #7397Re: file access in browser - security problem
From: John McGrath TeamB
Date: Tue, 26 Jun 2001 07:06
Date: Tue, 26 Jun 2001 07:06
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On Mon, 25 Jun 2001 21:04:05 GMT, webseal wrote:
> in my applet I try to read some data out of an text file,
> that is stored in the same URL as the applet class on the
> server.
>
> I use the following construct to read the file
There are two problems here.
First, the File class is used to identify a file on a local file
system. When you run in the AppletViewer, the file is on a local
file system, so there is no problem. But that would not work over
the net. Your applet would be executing within the browser in the
client's machine, and the file would be on the HTTP server.
Even if the file were located on the client machine, you would not
be allowed to read it from an Applet, unless you had signed the
Applet and given it permission to read the local file system.
There are ways to get a resource from the JAR file that contains
you class files, but I understand that there are some problems
with different browsers' implementations of this. Try posting on
the "applet-issues" newsgroup -- people there will be more familiar
with the issues.
--
Regards,
John McGrath [TeamB]
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f74b3,5c9fc3a5ac4eaeb1 X-Google-Attributes: gidf74b3,public X-Google-ArrivalTime: 2001-06-26 00:09:40 PST From: John McGrath [TeamB] <ng-b@JPMcGrath.net> Newsgroups: borland.public.jbuilder.java.language Subject: Re: file access in browser - security problem Date: Tue, 26 Jun 2001 03:06:42 -0400 Message-ID: <MPG.15a1f9bdbd0dd1ea98a2e1@forums.borland.com> References: <3b37a31f.27266020@newsgroups.borland.com> X-Newsreader: MicroPlanet Gravity v2.30 NNTP-Posting-Host: 209.92.40.60 X-Trace: dnews 993539200 209.92.40.60 (26 Jun 2001 00:06:40 -0700) Lines: 34 X-Authenticated-User: jpmcgrath Path: arc1-ca.pugleaf.net!archiver1.google.com!newsfeed.google.com!sn-xit-02!supernews.com!peer.news.opaltelecom.net!newsfeed.wirehub.nl!newsfeeds.belnet.be!news.belnet.be!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!dnews