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Merge pull request #2309 from annando/1602-new-guid

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New method to create a guid if none was given
This commit is contained in:
Tobias Diekershoff 2016-02-03 07:07:13 +01:00
commit ada4fbdfb9
1 changed files with 28 additions and 27 deletions
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55
include/items.php
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@ -773,6 +773,30 @@ function item_add_language_opt(&$arr) {
}
}
/**
* @brief Creates an unique guid out of a given uri
*
* @param string $uri uri of an item entry
* @return string unique guid
*/
function uri_to_guid($uri) {
// Our regular guid routine is using this kind of prefix as well
// We have to avoid that different routines could accidentally create the same value
$parsed = parse_url($uri);
$guid_prefix = hash("crc32", $parsed["host"]);
// Remove the scheme to make sure that "https" and "http" doesn't make a difference
unset($parsed["scheme"]);
$host_id = implode("/", $parsed);
// We could use any hash algorithm since it isn't a security issue
$host_hash = hash("ripemd128", $host_id);
return $guid_prefix.$host_hash;
}
function item_store($arr,$force_parent = false, $notify = false, $dontcache = false) {
// If it is a posting where users should get notifications, then define it as wall posting
@ -848,33 +872,6 @@ function item_store($arr,$force_parent = false, $notify = false, $dontcache = fa
}
}
// If there is no guid then take the same guid that was taken before for the same uri
if ((trim($arr['guid']) == "") AND (trim($arr['uri']) != "") AND (trim($arr['network']) != "")) {
logger('item_store: checking for an existing guid for uri '.$arr['uri'], LOGGER_DEBUG);
$r = q("SELECT `guid` FROM `guid` WHERE `uri` = '%s' AND `network` = '%s' LIMIT 1",
dbesc(trim($arr['uri'])), dbesc(trim($arr['network'])));
if(count($r)) {
$arr['guid'] = $r[0]["guid"];
logger('item_store: found guid '.$arr['guid'].' for uri '.$arr['uri'], LOGGER_DEBUG);
}
}
// If there is no guid then take the same guid that was taken before for the same plink
if ((trim($arr['guid']) == "") AND (trim($arr['plink']) != "") AND (trim($arr['network']) != "")) {
logger('item_store: checking for an existing guid for plink '.$arr['plink'], LOGGER_DEBUG);
$r = q("SELECT `guid`, `uri` FROM `guid` WHERE `plink` = '%s' AND `network` = '%s' LIMIT 1",
dbesc(trim($arr['plink'])), dbesc(trim($arr['network'])));
if(count($r)) {
$arr['guid'] = $r[0]["guid"];
logger('item_store: found guid '.$arr['guid'].' for plink '.$arr['plink'], LOGGER_DEBUG);
if ($r[0]["uri"] != $arr['uri'])
logger('Different uri for same guid: '.$arr['uri'].' and '.$r[0]["uri"].' - this shouldnt happen!', LOGGER_DEBUG);
}
}
// Shouldn't happen but we want to make absolutely sure it doesn't leak from a plugin.
// Deactivated, since the bbcode parser can handle with it - and it destroys posts with some smileys that contain "<"
//if((strpos($arr['body'],'<') !== false) || (strpos($arr['body'],'>') !== false))
@ -884,6 +881,10 @@ function item_store($arr,$force_parent = false, $notify = false, $dontcache = fa
if ($notify)
$guid_prefix = "";
elseif ((trim($arr['guid']) == "") AND (trim($arr['plink']) != ""))
$arr['guid'] = uri_to_guid($arr['plink']);
elseif ((trim($arr['guid']) == "") AND (trim($arr['uri']) != ""))
$arr['guid'] = uri_to_guid($arr['uri']);
else {
$parsed = parse_url($arr["author-link"]);
$guid_prefix = hash("crc32", $parsed["host"]);