Tupambae_Org/friendica_2021-01
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allow more than one embedded private photo

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This commit is contained in:
Zach Prezkuta 2012-07-07 16:20:24 -06:00
commit 173b3a1b9a
4 changed files with 327 additions and 139 deletions
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189
include/items.php
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@ -4,6 +4,8 @@ require_once('include/bbcode.php');
require_once('include/oembed.php');
require_once('include/salmon.php');
require_once('include/crypto.php');
require_once('include/Photo.php');
function get_feed_for(&$a, $dfrn_id, $owner_nick, $last_update, $direction = 0) {
@ -284,19 +286,6 @@ function construct_activity_target($item) {
*
* The purpose of this function is to apply system message length limits to
* imported messages without including any embedded photos in the length
*
* How it works (other than when the body length is less than the max length at the outset):
* 1. When the text length without embedded images is less than the max length
* a. The while() loop does run, since there are embedded images
* b.
*
* 2. When the text length exceeds the max length before the first embedded image
*
* 3. When the text length exceeds the max length in between embedded images
*
* 4. When the text length exceeds the max length after the last embedded image
*
* 5. When there are no embedded images
*/
if(! function_exists('limit_body_size')) {
function limit_body_size($body) {
@ -306,84 +295,80 @@ function limit_body_size($body) {
$maxlen = get_max_import_size();
// If the length of the body, including the embedded images, is smaller
// than the maximum, then don't waste processing looking for the images
// than the maximum, then don't waste time looking for the images
if($maxlen && (strlen($body) > $maxlen)) {
logger('limit_body_size: the body length exceeds the limit', LOGGER_DEBUG);
logger('limit_body_size: the total body length exceeds the limit', LOGGER_DEBUG);
$img_pos = array();
$max_pos = 0;
$orig_body = $body;
$new_body = '';
$textlen = 0;
$max_found = false;
$body_left = $body;
$cnt = 0;
$img_pos[$cnt] = array('start' => strpos($body_left, '[img]data:'));
while($img_pos[$cnt]['start'] !== false) {
$img_start = strpos($orig_body, '[img');
$img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
$img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
while(($img_st_close !== false) && ($img_end !== false)) {
// We're assuming that at this point, every opening '[img]data:' tag has a closing [/img] tag
$img_pos[$cnt]['end'] = strpos(substr($body_left, $img_pos[$cnt]['start'], strlen($body_left) - $img_pos[$cnt]['start']), '[/img]');
$img_pos[$cnt]['end'] += strlen('[/img]');
$img_pos[$cnt]['end'] += $img_pos[$cnt]['start'];
$img_st_close++; // make it point to AFTER the closing bracket
$img_end += $img_start;
$img_end += strlen('[/img]');
if(! $cnt) {
// This code should only run in the first loop
$textlen = $img_pos[$cnt]['start'];
if( ($maxlen - $textlen) <= 0 ) {
$maxpos = $maxlen;
$maxcnt = $cnt;
if(! strcmp(substr($orig_body, $img_start + $img_st_close, 5), 'data:')) {
// This is an embedded image
if( ($textlen + $img_start) > $maxlen ) {
if($textlen < $maxlen) {
logger('limit_body_size: the limit happens before an embedded image', LOGGER_DEBUG);
$new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
$textlen = $maxlen;
}
}
else {
$new_body = $new_body . substr($orig_body, 0, $img_start);
$textlen += $img_start
}
$new_body = $new_body . substr($orig_body, $img_start, $img_end - $img_start);
}
else {
$newlen = $img_pos[$cnt]['start'] - $img_pos[$cnt - 1]['end']; // The length between the last embedded image and the next
if( (! $max_pos) && (($maxlen - ($textlen + $newlen)) <= 0) ) {
// $max_pos should be 0 until the message text exceeds the limit.
// If the limit has already been set, don't set it again
$len_left = $maxlen - $textlen;
$maxpos = $img_pos[$cnt - 1]['end'] + $len_left; // We'll cut off the text at this position
$maxcnt = $cnt;
if( ($textlen + $img_end) > $maxlen ) {
if($textlen < $maxlen) {
logger('limit_body_size: the limit happens before the end of a non-embedded image', LOGGER_DEBUG);
$new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
$textlen = $maxlen;
}
}
else {
$new_body = $new_body . substr($orig_body, 0, $img_end);
$textlen += $img_end;
}
$textlen += $newlen;
}
$orig_body = substr($orig_body, $img_end);
$body_left = substr($body_left, $img_pos[$cnt]['end'], strlen($body_left) - $img_pos[$cnt]['end']);
$cnt++;
$img_pos[$cnt] = array('start' => strpos($body_left, '[img]data:') + $img_pos[$cnt - 1]['end']);
if($orig_body === false) // in case the body ends on a closing image tag
$orig_body = '';
$img_start = strpos($orig_body, '[img');
$img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
$img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
}
logger('limit_body_size: the while loop ran ' . $cnt . ' times', LOGGER_DEBUG);
if(! $cnt) {
// The while() loop never ran -- there are no embedded images
$maxpos = $maxlen;
$maxcnt = $cnt;
$textlen = strlen($body);
if( ($textlen + strlen($orig_body)) > $maxlen) {
if($textlen < $maxlen) {
logger('limit_body_size: the limit happens after the end of the last image', LOGGER_DEBUG);
$new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
$textlen = $maxlen;
}
}
else {
// The while() loop did run. But the end of the last embedded image may not be the end of the body
// Check if the maximum length occurs between the end of the last embedded image and the end of the text
$newlen = strlen($body_left);
if( (! $max_pos) && (($maxlen - ($textlen + $newlen)) <= 0) ) {
$len_left = $maxlen - $textlen;
$maxpos = $img_pos[$cnt - 1]['end'] + $len_left; // We'll cut off the text at this position
$maxcnt = $cnt;
}
$textlen += $newlen;
logger('limit_body_size: the text size with embedded images extracted did not violate the limit', LOGGER_DEBUG);
$new_body = $new_body . $orig_body;
$textlen += strlen($orig_body);
}
if($textlen > $maxlen) {
$newbody = substr($body, 0, $maxpos); // Note: $maxpos is the position of the character AFTER the maximum length
// Now pile all the remaining embedded images onto the end
for($i = $maxcnt; $i < $cnt; $i++)
$newbody = $newbody . substr($body, $img_pos[$i]['start'], $img_pos[$i]['end'] - $img_pos[$i]['start']);
logger('limit_body_size: the text length (w/o embedded images) was ' . $textlen . ' and the limit was ' . $maxlen . '. Body truncated', LOGGER_DEBUG);
return $newbody;
}
else // When embedded images are excluded, the text length is less than the maximum, so we're good
return $body;
return $new_body;
}
else
return $body;
@ -3196,20 +3181,33 @@ function atom_entry($item,$type,$author,$owner,$comment = false,$cid = 0) {
return $o;
}
function fix_private_photos($s,$uid, $item = null, $cid = 0) {
function fix_private_photos($s, $uid, $item = null, $cid = 0) {
$a = get_app();
logger('fix_private_photos', LOGGER_DEBUG);
$site = substr($a->get_baseurl(),strpos($a->get_baseurl(),'://'));
if(preg_match("/\[img(.*?)\](.*?)\[\/img\]/is",$s,$matches)) {
$image = $matches[2];
$orig_body = $s;
$new_body = '';
$img_start = strpos($orig_body, '[img');
$img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
$img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
while( ($img_st_close !== false) && ($img_len !== false) ) {
$img_st_close++; // make it point to AFTER the closing bracket
$image = substr($orig_body, $img_start + $img_st_close, $img_len);
logger('fix_private_photos: found photo ' . $image, LOGGER_DEBUG);
if(stristr($image , $site . '/photo/')) {
// Only embed locally hosted photos
$replace = false;
$i = basename($image);
$i = str_replace(array('.jpg','.png'),array('',''),$i);
$x = strpos($i,'-');
if($x) {
$res = substr($i,$x+1);
$i = substr($i,0,$x);
@ -3228,9 +3226,6 @@ function fix_private_photos($s,$uid, $item = null, $cid = 0) {
// permissions, regardless of order but first check to see if they're an exact
// match to save some processing overhead.
// Currently we only embed one private photo per message so as not to hit import
// size limits at the receiving end.
// To embed multiples, we would need to parse out the embedded photos on message
// receipt and limit size based only on the text component. Would also need to
// ignore all photos during bbcode translation and item localisation, as these
@ -3249,15 +3244,45 @@ function fix_private_photos($s,$uid, $item = null, $cid = 0) {
}
}
if($replace) {
$data = $r[0]['data'];
$type = $r[0]['type'];
// If a custom width and height were specified, apply before embedding
if(preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
logger('fix_private_photos: scaling photo', LOGGER_DEBUG);
$width = intval($match[1]);
$height = intval($match[2]);
$ph = new Photo($data, $type);
if($ph->is_valid()) {
$ph->scaleImage(max($width, $height));
$data = $ph->imageString();
$type = $ph->getType();
}
}
logger('fix_private_photos: replacing photo', LOGGER_DEBUG);
$s = str_replace($image, 'data:' . $r[0]['type'] . ';base64,' . base64_encode($r[0]['data']), $s);
logger('fix_private_photos: replaced: ' . $s, LOGGER_DATA);
$image = 'data:' . $type . ';base64,' . base64_encode($data);
logger('fix_private_photos: replaced: ' . $image, LOGGER_DATA);
}
}
}
}
$new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
$orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
if($orig_body === false)
$orig_body = '';
$img_start = strpos($orig_body, '[img');
$img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
$img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
}
return($s);
$new_body = $new_body + $orig_body;
return($new_body);
}