search a web server directory

[Hostos]

Hello All,

Please advice...I would like to do this in php, but I am open
to suggestions


I am going to place about 6 gigs of jpeg pictures on a web
server. And. I want to allow a user to go to a web page and type in
the name of a file, and if the file is found in the particular
directory on the server, the jpeg picuture will then be display in the
web browser.


I am thinking about just having a php script that will search
the particular directory, but I am not sure where to get started.
Also, will this bogg down the server.

And, in case anyone is wondering...thi s is being done for a
department at my university.


thanks,
Hostos

[Pedro Graca]

Re: search a web server directory

Hostos wrote:[color=blue]
> I want to allow a user to go to a web page and type in
> the name of a file, and if the file is found in the particular
> directory on the server, the jpeg picuture will then be display in the
> web browser.[/color]
[color=blue]
> I am thinking about just having a php script that will search
> the particular directory, but I am not sure where to get started.[/color]

<?php
// this script is the action specified for the form that asks for the
// file name (or the same script that outputs the form
$filename = $_POST['filename'];
$directory = 'images/2003/';
if (isfile($direct ory . $filename)) {
echo '<img src="', $directory . $filename, '"/>';
} else {
echo '<p class="error">f ile ', $filename, ' does not exist in ',
$directory, '.</p>';
}
?>
[color=blue]
> Also, will this bogg down the server.[/color]

I don't know. If it does maybe it's better to check for filename in a
filelist text file generated automaticcaly (by a cron job?)
--
--= my mail box only accepts =--
--= Content-Type: text/plain =--
--= Size below 10001 bytes =--

[CountScubula]

Re: search a web server directory

"Hostos" <hmon6710@hotma il.com> wrote in message
news:e9f4a21b.0 403012133.75c1d ce1@posting.goo gle.com...[color=blue]
> Hello All,
>
> Please advice...I would like to do this in php, but I am open
> to suggestions
>
>
> I am going to place about 6 gigs of jpeg pictures on a web
> server. And. I want to allow a user to go to a web page and type in
> the name of a file, and if the file is found in the particular
> directory on the server, the jpeg picuture will then be display in the
> web browser.
>
>
> I am thinking about just having a php script that will search
> the particular directory, but I am not sure where to get started.
> Also, will this bogg down the server.
>
> And, in case anyone is wondering...thi s is being done for a
> department at my university.
>
>
> thanks,
> Hostos[/color]



just a thought, but if its a linux platform you can try the locate command,
and pass through grep for the parent directory:

// find all house pictures
$searchString = "house";
$files = `locate $searchString | grep '/www/parent/dir/pictures/'`;

to update the locate db, type this on the command line:
updatedb

or wait untill the next day, it should be already in a cron job

--
Mike Bradley
http://www.gzentools.com -- free online php tools

[Andy Jeffries]

Re: search a web server directory

CountScubula wrote:[color=blue]
> just a thought, but if its a linux platform you can try the locate command,
> and pass through grep for the parent directory:
>
> // find all house pictures
> $searchString = "house";
> $files = `locate $searchString | grep '/www/parent/dir/pictures/'`;[/color]

Remember though that if the user is typing in $searchString - NEVER EVER
DO THE SECOND LINE SHOWN ABOVE!

If the user types "a; rm -f /some/file/here; locate a" as $searchString
it will delete the file (if Apache has permissions) and continue as if
nothing had happened....

Cheers,


Andy

[CountScubula]

Re: search a web server directory

"Andy Jeffries" <newnews@seirff ej.reverse.prev ious.word.co.uk > wrote in
message news:1078234988 .7573.0@echo.uk .clara.net...[color=blue]
> CountScubula wrote:[color=green]
> > just a thought, but if its a linux platform you can try the locate[/color][/color]
command,[color=blue][color=green]
> > and pass through grep for the parent directory:
> >
> > // find all house pictures
> > $searchString = "house";
> > $files = `locate $searchString | grep '/www/parent/dir/pictures/'`;[/color]
>
> Remember though that if the user is typing in $searchString - NEVER EVER
> DO THE SECOND LINE SHOWN ABOVE!
>
> If the user types "a; rm -f /some/file/here; locate a" as $searchString
> it will delete the file (if Apache has permissions) and continue as if
> nothing had happened....
>
> Cheers,
>
>
> Andy[/color]

True, but this was not meant to be a end all script snippet, however, I
should have seen that comming.

REVISED:

// find all house pictures
$searchString = "house";
$searchString = strtr($searchSt ring,";./ ","----"); // andd chrs to remove,
as to keep safe
$files = `locate $searchString | grep '/www/parent/dir/pictures/'`;

--
Mike Bradley
http://www.gzentools.com -- free online php tools

[Andy Jeffries]

Re: search a web server directory

CountScubula wrote:[color=blue][color=green][color=darkred]
>>>// find all house pictures
>>>$searchStrin g = "house";
>>>$files = `locate $searchString | grep '/www/parent/dir/pictures/'`;[/color]
>>
>>Remember though that if the user is typing in $searchString - NEVER EVER
>>DO THE SECOND LINE SHOWN ABOVE!
>>
>>If the user types "a; rm -f /some/file/here; locate a" as $searchString
>>it will delete the file (if Apache has permissions) and continue as if
>>nothing had happened....[/color]
>
> True, but this was not meant to be a end all script snippet, however, I
> should have seen that comming.[/color]

I know you knew that Mike (we've had technical chats a few times IIRC)
but I thought it prudent for anyone finding the post through Google or
maybe the OP.

Cheers,


Andy

[CountScubula]

Re: search a web server directory

"Andy Jeffries" <andy@seirffej. reverse.previou s.word.co.uk> wrote in message
news:1078305967 .11140.0@ersa.u k.clara.net...[color=blue]
> CountScubula wrote:[color=green][color=darkred]
> >>>// find all house pictures
> >>>$searchStrin g = "house";
> >>>$files = `locate $searchString | grep '/www/parent/dir/pictures/'`;
> >>
> >>Remember though that if the user is typing in $searchString - NEVER EVER
> >>DO THE SECOND LINE SHOWN ABOVE!
> >>
> >>If the user types "a; rm -f /some/file/here; locate a" as $searchString
> >>it will delete the file (if Apache has permissions) and continue as if
> >>nothing had happened....[/color]
> >
> > True, but this was not meant to be a end all script snippet, however, I
> > should have seen that comming.[/color]
>
> I know you knew that Mike (we've had technical chats a few times IIRC)
> but I thought it prudent for anyone finding the post through Google or
> maybe the OP.
>
> Cheers,
>
>
> Andy[/color]

Hi Andy, I didn't take any offense to it, I totally agree with you. Funny
thing is, someone posted a piece of code and asked what was wrong, and I
went to thier site, and brough it down several times (with thier permission)
and exploited several things, from just such a type of thing.

Thanks for keeping me on my toes. :)

--
Mike Bradley
http://www.gzentools.com -- free online php tools

[Chung Leong]

Re: search a web server directory

Uzytkownik "Pedro Graca" <hexkid@hotpop. com> napisal w wiadomosci
news:c21kr1$1lm 8pu$1@ID-203069.news.uni-berlin.de...[color=blue][color=green]
> > Also, will this bogg down the server.[/color]
>
> I don't know. If it does maybe it's better to check for filename in a
> filelist text file generated automaticcaly (by a cron job?)[/color]

Or cache the list and do a mtime comparison between the file and the
directory. It probably takes longer though for PHP to find an item in an
array then for the file system to locate a file, since there isn't function
that performs binary search.