Dynamic images

[CountScubula]

Ok, I just wrote some functions last night for a few people, I posted them
up for whom ever wants it (free)

http://www.gzentools.com/gzimg.php

It is simple a way to spit out thumbs, or resized images, and to cache the
image so it doesnt have to be rebuilt.

Nothing fancy, but it could help a few people out.

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

[Chung Leong]

Nice. I think we make better use of the client cache though, by redirecting
to the generated image. As it is, the browser has to refetch the image
everytime.

Uzytkownik "CountScubula" <[e-mail]> napisal w wiadomosci
news:5F******************@newssvr25.news.prodigy.c om...

Ok, I just wrote some functions last night for a few people, I posted them
up for whom ever wants it (free)

http://www.gzentools.com/gzimg.php

It is simple a way to spit out thumbs, or resized images, and to cache the
image so it doesnt have to be rebuilt.

Nothing fancy, but it could help a few people out.

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

[CountScubula]

"Chung Leong" <ch***********@hotmail.com> wrote in message
news:iI********************@comcast.com...

Nice. I think we make better use of the client cache though, by redirecting to the generated image. As it is, the browser has to refetch the image
everytime.

Thank you,

Hmm, sounds interesting, you mean have a cache dir that is in the web server
view, and do a Location: bla.... to point to the image?

Hmm I will have to play and see, becouse as it is, if there is any change
int he source image, there is a new image generated.

also, I just added a few more functions:

title - add a caption
pan - show part of image
zoom - show a zoomed from middle portion
tile - tile the image

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

[FLEB]

Regarding this well-known quote, often attributed to CountScubula's famous
"Sat, 24 Jan 2004 01:48:37 GMT" speech:

"Chung Leong" <ch***********@hotmail.com> wrote in message
news:iI********************@comcast.com...

Nice. I think we make better use of the client cache though, by

redirecting

to the generated image. As it is, the browser has to refetch the image
everytime.

Thank you,

Hmm, sounds interesting, you mean have a cache dir that is in the web server
view, and do a Location: bla.... to point to the image?

Hmm I will have to play and see, becouse as it is, if there is any change
int he source image, there is a new image generated.

also, I just added a few more functions:

title - add a caption
pan - show part of image
zoom - show a zoomed from middle portion
tile - tile the image

Just title the cached image uniquely --

something like:
[PATH-HASH]_[MOD-DATE].ext

where [PATH-HASH] is the full original path, run through something (md5 or
a search-replace) to purge evil chars, and [MOD-DATE] is the file's
last-modified date. When the code is run, do something like:

1.) Get all filenames containing [PATH-HASH] in the cache directory
2.) Is the latest [MOD-DATE] the same as the real file's modified-stamp?

3. Yes) Do not recreate the thumbnail. Redirect to the cached version.

3. No) Delete (unlink) all files with [PATH-HASH]_*
4. No) Create a new thumbnail, and redirect to it.

--
-- Rudy Fleminger
-- [e-mail]
(put "Hey!" in the Subject line for priority processing!)
-- http://www.pixelsaredead.com

[CountScubula]

"FLEB" <so*********@mmers.and.evil.ones.will.bow-down-to.us> wrote in
message news:1p******************************@40tude.net.. .

Regarding this well-known quote, often attributed to CountScubula's famous
"Sat, 24 Jan 2004 01:48:37 GMT" speech:

1.) Get all filenames containing [PATH-HASH] in the cache directory
2.) Is the latest [MOD-DATE] the same as the real file's modified-stamp?

3. Yes) Do not recreate the thumbnail. Redirect to the cached version.

3. No) Delete (unlink) all files with [PATH-HASH]_*
4. No) Create a new thumbnail, and redirect to it.

--
-- Rudy Fleminger
-- [e-mail]
(put "Hey!" in the Subject line for priority processing!)
-- http://www.pixelsaredead.com

the images are already cached and uniq named, Leong was talking about
redirecting rather than readfile. look at the script and you will
understand.

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

[Chung Leong]

Yup, let Apache send the image, since it's pretty good at dealing with the
nitty gritty of HTTP transport (caching, validation, partial retrieval,
etc.). Also saves a trip into the PHP output buffer.

I guess you can implement it in a different set of functions, so that you
would retain the ability to send the file via PHP, in cases where you want
to control access to the images.

One more suggestion: before calling readfile(), do a session_write_close()
to remove the session lock if a session is opened.

Uzytkownik "CountScubula" <[e-mail]> napisal w wiadomosci
news:V9******************@newssvr25.news.prodigy.c om...

"Chung Leong" <ch***********@hotmail.com> wrote in message
news:iI********************@comcast.com...
Hmm, sounds interesting, you mean have a cache dir that is in the web server view, and do a Location: bla.... to point to the image?

Hmm I will have to play and see, becouse as it is, if there is any change
int he source image, there is a new image generated.

also, I just added a few more functions:

title - add a caption
pan - show part of image
zoom - show a zoomed from middle portion
tile - tile the image

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

[CountScubula]

"Chung Leong" <ch***********@hotmail.com> wrote in message
news:7o********************@comcast.com...

Yup, let Apache send the image, since it's pretty good at dealing with the
nitty gritty of HTTP transport (caching, validation, partial retrieval,
etc.). Also saves a trip into the PHP output buffer.

Working on it as we converse, will be in ver 1.5, I added a few things check
it out.
One more suggestion: before calling readfile(), do a session_write_close()
to remove the session lock if a session is opened.

Please explain, can you elaborate?

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

[Dan Tripp]

CountScubula wrote:

"Chung Leong" <ch***********@hotmail.com> wrote in message
news:7o********************@comcast.com...

Yup, let Apache send the image, since it's pretty good at dealing with the
nitty gritty of HTTP transport (caching, validation, partial retrieval,
etc.). Also saves a trip into the PHP output buffer.

Working on it as we converse, will be in ver 1.5, I added a few things check
it out.

One more suggestion: before calling readfile(), do a session_write_close()
to remove the session lock if a session is opened.

Please explain, can you elaborate?

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

I dig this:
gzImageSetCacheDir(dir[,url]);
That's hot.

- Dan
http://www.dantripp.com/

[Chung Leong]

Two PHP scripts cannot access the same session simultaneously. If the
browser tries to download two images concurrently, and a session is opened
(say, if auto session is used), one of them will stall until the other is
done, unless you release the session with a call to session_write_close().

Uzytkownik "CountScubula" <[e-mail]> napisal w wiadomosci
news:LA*****************@newssvr29.news.prodigy.co m...

"Chung Leong" <ch***********@hotmail.com> wrote in message
news:7o********************@comcast.com...

Yup, let Apache send the image, since it's pretty good at dealing with the nitty gritty of HTTP transport (caching, validation, partial retrieval,
etc.). Also saves a trip into the PHP output buffer.

Working on it as we converse, will be in ver 1.5, I added a few things

check it out.

One more suggestion: before calling readfile(), do a session_write_close() to remove the session lock if a session is opened.

Please explain, can you elaborate?

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