commit 6a929f5abd7f22a4f5398760e4163cfde754843c Author: Anthony Le Mansec Date: Sat Sep 4 00:13:31 2010 +0200 Initial import of old webassets files to new git repository. - tested on recent builds of apache/php, imagemagick and pecl imagick extension. - updated README and INSTALL files with current server-sides software versions. - added image magick jpeg2k DELEGATE notes. diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..a01ee28 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +.*.swp diff --git a/AUTHOR b/AUTHOR new file mode 100644 index 0000000..2f10b1a --- /dev/null +++ b/AUTHOR @@ -0,0 +1,2 @@ +Anthony Le Mansec + diff --git a/CONTRIBUTORS b/CONTRIBUTORS new file mode 100644 index 0000000..e69de29 diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/COPYING @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/ChangeLog b/ChangeLog new file mode 100644 index 0000000..eefee49 --- /dev/null +++ b/ChangeLog @@ -0,0 +1,5 @@ +2010-09-04 + * added imagemagick jpeg2k delegate notes to README and INSTALL files. + * updated README file with current server-side software versions in use. + * moving from old svn repository to git. + diff --git a/INSTALL b/INSTALL new file mode 100644 index 0000000..c306ea0 --- /dev/null +++ b/INSTALL @@ -0,0 +1,79 @@ +Requirements : +-------------- +- Running OpenSimulator Grid +- Php-enabled webserver +- Php5 > 5.1.3 +- ImageMagick > 6.2.4 (WITH jp2 delegate) +- imagick PECL > 2.2.0 (http://pecl.php.net/package/imagick or "pecl install imagick") + +- (optional) : suitable tmpreaper settings, to remove expired images from cache. + + +Imagemagick jp2 delegate : +-------------------------- +Your imagemagick version should have jpeg2k support : + + convert -list configure | grep DELEGATES +should contain 'jp2' +(on a gentoo box, 'jpeg2k' USE flag do the job ; on binary-based distros, you'll have to manually build your imagemagick copy). + + +Setup : +------- +1. move the "cache" directory out of your webserver documentRoot : + sudo mkdir -p /var/www/datas/webassets/cache +2. Ensure your webserver has write permissions over the cache directory : + (replace apache.apache with your webserver user.group, according to your configuration) + sudo chown -R apache.apache /var/www/datas/webassets +3. move all files and directories to your documentRoot +4. EDIT inc/config.php and BE SURE TO EDIT : + ** ASSET_SERVER to point to your asset server + (should match your OpenSim.ini asset_server_url entry, followed by "/assets/") + example: define('ASSET_SERVER', 'http://assets.osgrid.org:8003/assets/'); + ** JP2_CACHE_DIR to point to your new cache/jp2/ location + (eg: '/var/www/datas/webassets/cache/jp2/' ) + ** PIC_CACHE_DIR to point to your new cache/pic location + (eg: '/var/www/datas/webassets/cache/pic/' ) + * ASSET_ID_NOTFOUND to point to a 'default' asset to show when asset.php is called with wrong params + (seach your database, or enter '00000000-0000-0000-0000-000000000000') + + * if your asset server is under heavy load, consider increasing ASSET_SERVER_TIMEOUT + + + +TEST : +------ +1. find an asset id stored on _your_ asset server : + * by using your database query tool + OR + * by searching for the string "asset found" in your OpenSim.Grid.AssetServer.log + + you should get an asset UUID in the form : + 2bfd3884-7e27-69b9-ba3a-3e673f680004 + +2. Point your webbrowser to the url of your webassets/asset.php : + http://your.webserver.tld/asset.php?id=2bfd3884-7e27-69b9-ba3a-3e673f680004 + (if you've read this, you know how to retrieve that asset UUID don't you? :p ) + +You should see the asset image, resized to ASSET_RESIZE_FIXED_WIDTH pixel width. +(first load may take a second or two, following accesses to this url should be really faster.) + + +Next thing to try is to enter a wrong UUID, add a digit at the end of previous url... +... after ASSET_SERVER_TIMEOUT seconds (default to 8s) you should see a default picture, indicating +that the operation failed. + + +USAGE : +------- + +In your webpage, just display your image using : + + + +(replacing 150 with ASSET_RESIZE_FIXED_WIDTH from inc/config.php may be a good idea.) + + +-- +A.LM. + diff --git a/README b/README new file mode 100644 index 0000000..9689bb4 --- /dev/null +++ b/README @@ -0,0 +1,25 @@ +About WebAssets for OpenSimulator +-===============================- +This small set of php functions provide easy access to OpenSimulator +assets, adding another level of caching, thus limiting load on given +asset server. + +Typical usage includes web publication of avatar's profile pictures, library and user +stored textures, region maptiles, user and regions/lands snapshots. + +It was updated and tested on September 2010, with following software : + +WebServer : + - Apache 2.2.16 + - Php 5.2.14 + - imagick 2.3.0 PECL package + - ImageMagick 6.6.2.5 with jpeg2k delegate + running on linux 2.6.34, gentoo 64bits + +OpenSimulator AssetServer : + - OpenSimulator 0.6.9 (grid mode) both from a local grid and current osgrid.org GRID. + +Installation +-==========- +See included file INSTALL + diff --git a/TODO b/TODO new file mode 100644 index 0000000..c26108b --- /dev/null +++ b/TODO @@ -0,0 +1,5 @@ +- Basic ImageMagick exceptions/error handling + +- Make a clean oo interface to this. + + diff --git a/asset.php b/asset.php new file mode 100644 index 0000000..a73df17 --- /dev/null +++ b/asset.php @@ -0,0 +1,42 @@ +. + */ + +/** + * @file asset.php + * + * @brief Fetches, converts, caches, and display requested asset (picture). + * + * Usage : + */ +require_once('inc/config.php'); +require_once('inc/asset.php'); + +$format = (isset($_REQUEST['format'])) ? $_REQUEST['format'] : IMAGE_DEFAULT_FORMAT; +$asset_id = (isset($_REQUEST['id'])) ? $_REQUEST['id'] : ASSET_ID_NOTFOUND; + +$asset_datas = asset_get($asset_id, $format); + +// TODO : set an array of mime types according to 'format' arg +Header("Content-type: image/jpg"); +echo $asset_datas; + +?> diff --git a/cache/index.php b/cache/index.php new file mode 100644 index 0000000..1396d7d --- /dev/null +++ b/cache/index.php @@ -0,0 +1,3 @@ + diff --git a/cache/jp2/index.php b/cache/jp2/index.php new file mode 100644 index 0000000..1396d7d --- /dev/null +++ b/cache/jp2/index.php @@ -0,0 +1,3 @@ + diff --git a/cache/pic/index.php b/cache/pic/index.php new file mode 100644 index 0000000..1396d7d --- /dev/null +++ b/cache/pic/index.php @@ -0,0 +1,3 @@ + diff --git a/inc/asset.php b/inc/asset.php new file mode 100644 index 0000000..04ac5ff --- /dev/null +++ b/inc/asset.php @@ -0,0 +1,117 @@ +. + */ +require_once('inc/config.php'); +require_once('inc/cache.php'); + +/** + * @brief Returns a default picture upon errors. + * + * @param format (string) file extension to return. + * @return raws datas of image configured in inc/config.php + * @author Anthony Le Mansec + */ +function asset_get_zero($format) { + $h = fopen(IMAGE_ID_ZERO.".".strtolower($format), "rb"); + $datas = fread($h, filesize(IMAGE_ID_ZERO.".".strtolower($format))); + fclose($h); + + return ($datas); +} + +/** + * @brief Returns raw image, in requested format. Also locally caches converted image. + * + * @param asset_id (string) Asset identifier, eg: "cb2052ae-d161-43e9-b11b-c834217823cd" + * @param format (string) Format as accepted by ImageMagick ("JPEG"|"GIF"|"PNG"|...) + * @return image raw datas, in given format. + * TODO : allow custom image width (resizing) with suitable caching directory + */ +function asset_get($asset_id, $format='JPEG') { + /* Zero UUID : returns default pic */ + if ($asset_id == "00000000-0000-0000-0000-000000000000") { + return (asset_get_zero($format)); + } + + /* + * If requested asset was locally cached in + * requested format, returns it: + */ + $cache_dir = PIC_CACHE_DIR; + $is_cached = cache_check($asset_id.".".strtolower($format), $cache_dir); + if ($is_cached) { + $h = fopen($cache_dir.$asset_id.".".strtolower($format), "rb"); + if ($h) { + $datas = fread($h, filesize($cache_dir.$asset_id.".".strtolower($format))); + fclose ($h); + return ($datas); + } + } + + /* + * Get jp2 asset either from local cache or + * remote asset server : + */ + $cache_dir = JP2_CACHE_DIR; + $is_cached = cache_check($asset_id, $cache_dir); + if (!$is_cached) { + $asset_url = ASSET_SERVER . $asset_id; + $h = @fopen($asset_url, "rb"); + if (!$h) { + return (asset_get_zero($format)); + } + stream_set_timeout($h, ASSET_SERVER_TIMEOUT); + $file_content = stream_get_contents($h); + fclose($h); + try { + $xml = new SimpleXMLElement($file_content); + } catch (Exception $e) { + return (asset_get_zero($format)); + } + $datas = base64_decode($xml->Data); + cache_write($asset_id, $datas, $cache_dir); + } else { + $h = fopen($cache_dir.$asset_id, "rb"); + $datas = fread($h, filesize($cache_dir.$asset_id)); + fclose($h); + } + + /* Convert original jp2 image to requested format : */ + $_img = new Imagick(); + $_img->readImageBlob($datas); // TODO : error checking + $_img->setImageFormat($format); // TODO : check for error + + if (ASSET_DO_RESIZE) { + $original_height = $_img->getImageHeight(); + $original_width = $_img->getImageHeight(); + $multiplier = ASSET_RESIZE_FIXED_WIDTH / $original_width; + $new_height = $original_height * $multiplier; + $_img->resizeImage(ASSET_RESIZE_FIXED_WIDTH, $new_height, Imagick::FILTER_CUBIC, 1); + // TODO : check for error + } + + if (! $dump = $_img->getImageBlob()) { + $reason = imagick_failedreason( $img ) ; + $description = imagick_faileddescription( $img ) ; + print "handle failed!
\nReason: $reason
\nDescription: $description
\n" ; + exit ; + } + + cache_write($asset_id.".".strtolower($format), $dump, PIC_CACHE_DIR); + return ($dump); +} + +?> diff --git a/inc/cache.php b/inc/cache.php new file mode 100644 index 0000000..e48b343 --- /dev/null +++ b/inc/cache.php @@ -0,0 +1,62 @@ +. + */ +require_once('inc/config.php'); + +/** + * @brief Checks whether given asset is locally cached in given cache directory. + * + * @param asset_id (string) Assetid to check + * @param cachedir jpeg2k / converted caching directory constant, as set in inc/config.php. + * @return true if picture is cached in given directory, false otherwise. + * + * @author Anthony Le Mansec + */ +function cache_check($asset_id, $cachedir=JP2_CACHE_DIR) { + $cache_file = $cachedir.$asset_id; + $file_max_age = time() - CACHE_MAX_AGE; + if (!file_exists($cache_file)) + return (false); + if (filemtime($cache_file) < $file_max_age) { + // expired, removing old file: + unlink($cache_file); + return (false); + } + + return (true); +} + + +/** + * @brief Stores given picture to given cache directory. + * + * @param asset_id (string) UUID of the asset to store. + * @param content (datas) raw image datas + * @param cachedir local directory where to store image (as defined in inc/config.php) + * @return false on error, true otherwise. + */ +function cache_write($asset_id, $content, $cachedir=JP2_CACHE_DIR) { + $cache_file = $cachedir.$asset_id; + $h = fopen($cache_file, "wb+"); + if (!$h) + return (false); + fwrite($h, $content); + fclose($h); + + return (true); +} + +?> diff --git a/inc/config.php b/inc/config.php new file mode 100644 index 0000000..1c7a74b --- /dev/null +++ b/inc/config.php @@ -0,0 +1,44 @@ +. + */ + +/** + * @file config.php + * @brief Misc configuration variables. + * + * @author Anthony Le Mansec + */ +define('ASSET_SERVER', 'http://assets.osgrid.org:8003/assets/'); // (OpenSim.ini: asset_server_url . "/assets/") +define('ASSET_SERVER_TIMEOUT', 8); // timeout in seconds, to wait while requesting an asset (default to 8) +define('ASSET_DO_RESIZE', true); // shall we resize picture to width=ASSET_RESIZE_FIXED_WIDTH ? +define('ASSET_RESIZE_FIXED_WIDTH', 150); // width in pixels + +/* Will show following image if no asset was requested (malformed query) : */ +define('ASSET_ID_NOTFOUND', 'cb2052ae-d161-43e9-b11b-c834217823cd'); + +/* will show following picture for Zero UUID (not found / malformed assets) : */ +define('IMAGE_ID_ZERO', '/var/www/mysite.com/webassets/pic/uuid_zero'); // no extension here + +define('IMAGE_DEFAULT_FORMAT', 'JPEG'); + +/* Re-use locally cached pictures (jp2k & converted) for 1 day before re-requesting it : */ +define('CACHE_MAX_AGE', 86400); // 1 day + +/* where to store cached pictures ? (user running your webserver needs write-permissions there : */ +define('JP2_CACHE_DIR', '/var/www/datas/webassets/cache/jp2/'); +define('PIC_CACHE_DIR', '/var/www/datas/webassets/cache/pic/'); + +?> diff --git a/inc/index.php b/inc/index.php new file mode 100644 index 0000000..1396d7d --- /dev/null +++ b/inc/index.php @@ -0,0 +1,3 @@ + diff --git a/pic/index.php b/pic/index.php new file mode 100644 index 0000000..1396d7d --- /dev/null +++ b/pic/index.php @@ -0,0 +1,3 @@ + diff --git a/pic/uuid_zero.jpeg b/pic/uuid_zero.jpeg new file mode 100644 index 0000000..d8127dd Binary files /dev/null and b/pic/uuid_zero.jpeg differ