Bug #60817 [Com]: stream_get_line() incorrectly blocks

Edit report at https://bugs.php.net/bug.php?id=60817&edit=1 ID: 60817 Comment by: john dot papaioannou at gmail dot com Reported by: landeholm at gmail dot com Summary: stream_get_line() incorrectly blocks Status: Re-Opened Type: Bug Package: Streams related Operating System: Linux/Ubuntu PHP Version: 5.3.9 Assigned To: cataphract Block user comment: N Private report: N New Comment: I am still seeing this issue using the code given by landeholm at gmail dot com (broken down into two scripts because I 'm on Windows). Specifically, referring to this line: print "server got line: " . stream_get_line($socket2, 1024, "\r\n") . "\n"; * with a buffer size of 1024, the read times out * with buffer sizes smaller or equal to the lines actually being written from the client (e.g. tried 5 and 8 bytes) the read works Windows 7 x64, PHP 5.3.10 x86 on Apache 2.2.21 Previous Comments: ------------------------------------------------------------------------ [2012-03-05 01:56:18] stas@php.net Re-opened to track 5.4. Please merge to 5.4 and close. ------------------------------------------------------------------------ [2012-01-22 20:57:19] cataphract@php.net This bug has been fixed in SVN. Snapshots of the sources are packaged every three hours; this change will be in the next snapshot. You can grab the snapshot at http://snaps.php.net/. For Windows: http://windows.php.net/snapshots/ Thank you for the report, and for helping us make PHP better. Fixed, now the function doesn't try to fill the buffer with $length bytes; it behaves more like fgets() typically returning false in the last iteration (if the file ends with the delimiter). ------------------------------------------------------------------------ [2012-01-22 20:30:38] cataphract@php.net Automatic comment from SVN on behalf of cataphract Revision: http://svn.php.net/viewvc/?view=revision&revision=322582 Log: - Further fix for bug #60455 (stream_get_line misbehaves if EOF is not detected together with the last read). - Fixed bug #60817 (stream_get_line() reads from stream even when there is already sufficient data buffered). stream_get_line() now behaves more like fgets(), as is documented. #withheld commit to 5.4 ------------------------------------------------------------------------ [2012-01-20 11:56:03] landeholm at gmail dot com Oops, the expected result should be: server got line: test #1 server got line: test2 server got line: test3 server got line: test4 server done client done ------------------------------------------------------------------------ [2012-01-20 11:55:10] landeholm at gmail dot com Description: ------------ stream_get_line() will block even though data has been received and there are lines ready to be parsed in php's internal buffer. It makes it impossible for example to implement a blocking HTTP server as the server will only parse the first line in the HTTP request and then both the server and client will hang as both are waiting for more data. Test script: --------------- $c = pcntl_fork(); if ($c > 0) { $socket = stream_socket_server("tcp://127.0.0.1:10000"); $socket2 = stream_socket_accept($socket); while (!feof($socket2)) print "server got line: " . stream_get_line($socket2, 1024, "\r\n") . "\n"; print "server done\n"; } else { sleep(1); $socket = stream_socket_client("tcp://127.0.0.1:10000"); fwrite($socket, "test #1\r\ntest2\r\ntest3\r\ntest4\r\n"); fread($socket, 1000); print "client done\n"; } die(0); Expected result: ---------------- client done server got line: test #1 server got line: test2 server got line: test3 server got line: test4 server done Actual result: -------------- server got line: test #1 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=60817&edit=1