#33760 [Opn->Asn]: cURL needs to implement CRYPTO_callback functions to prevent locking

ID: 33760 Updated by: edink@php.net Reported By: eja40 at cam dot ac dot uk -Status: Open +Status: Assigned Bug Type: cURL related Operating System: * PHP Version: 5CVS, 4CVS, 6CVS -Assigned To: +Assigned To: mike New Comment: Mike, since you got this thing to work with pecl/http could you have a look at implementing the callbacks in the curl extension? Previous Comments: ------------------------------------------------------------------------ [2005-07-28 00:46:46] daniel-curl at haxx dot se This is clearly documented in the libcurl tutorial and has been required by libcurl for years. Available online here: http://curl.haxx.se/libcurl/c/libcurl-tutorial.html#Multi-threading Certainly we are open for other/new solutions, but that doesn't fix this problem for you for older libcurl installations. ------------------------------------------------------------------------ [2005-07-20 15:18:08] eja40 at cam dot ac dot uk To help flesh out this problem and the solution - the example OpenSSL locking code is given by cURL here: http://curl.haxx.se/lxr/source/docs/examples/opensslthreadlock.c ------------------------------------------------------------------------ [2005-07-20 15:12:58] eja40 at cam dot ac dot uk Sorry I don't know how to patch it myself. However cURL insist that this must be implemented at the highest thread level - it cannot be implemented in libcurl (I don't understand why). Therefore it must be implemented in the PHP code. ------------------------------------------------------------------------ [2005-07-19 00:48:46] eja40 at cam dot ac dot uk Description: ------------ I am experiencing problems when using multi-threaded cURL requests. When I have more than about 5 threads connecting using HTTPS, all subsequent threads fail to connect (regardless of the timeout used). I presume this is because PHP hasn't implemented the CRYPTO_callback functions to prevent OpenSSL locking. Sorry I have no idea how to implement this fix myself - but the solution to the problem is elaborated here: http://curl.haxx.se/mail/lib-2004-06/0086.html ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=33760&edit=1