Bugs item #1486335, was opened at 2006-05-11 05:14 Message generated for change (Settings changed) made by gward You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1486335&group_id=5470
Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Python Library Group: Python 2.4 Status: Open Resolution: None Priority: 5 Submitted By: kxroberto (kxroberto) >Assigned to: Greg Ward (gward) Summary: httplib: read/_read_chunked failes with ValueError sometime Initial Comment: This occasionally shows up in a logged trace, when a application crahes on ValueError on a http(s)_response.read() : (py2.3.5 - yet relevant httplib code is still the same in current httplib) .... \' File "socket.pyo", line 283, in read\\n\', \' File "httplib.pyo", line 389, in read\\n\', \' File "httplib.pyo", line 426, in _read_chunked\\n\', \'ValueError: invalid literal for int(): \\n\'] ::: its the line: chunk_left = int(line, 16) Don't know what this line is about. Yet, that should be protected, as a http_response.read() should not fail with ValueError, but only with IOError/EnvironmentError, socket.error - otherwise Error Exception handling becomes a random task. -Robert Side note regarding IO exception handling: See also FR #1481036 (IOBaseError): why socket.error.__bases__ is (<class exceptions.Exception at 0x011244E0>,) ? ---------------------------------------------------------------------- Comment By: Greg Ward (gward) Date: 2006-07-24 15:38 Message: Logged In: YES user_id=14422 I'm seeing this with Python 2.3.5 and 2.4.3 hitting a PHP app and getting a large error page. It looks as though the server is incorrectly chunking the response: lwp-request at least gives a better error message than httplib.py: $ GET "http://..."; 500 EOF when chunk header expected I'm unclear on precisely what the server is doing wrong. The response looks like this: HTTP/1.1 200 OK Date: Mon, 24 Jul 2006 19:18:47 GMT Server: Apache/2.0.54 (Fedora) X-Powered-By: PHP/4.3.11 Connection: close Transfer-Encoding: chunked Content-Type: text/html; charset=UTF-8 2169\r\n \r\n [...first 0x2169 bytes of response...]\r\n 20b2\r\n [...next 0x20b2 bytes...] [...repeat many times...] 20b2\r\n [...the last 0x20b2 bytes...] \r\n The blank line at eof appears to be confusing httplib.py: it bombs because int('', 16) raises ValueError. Observation #1: if this is indeed a protocol error (ie. the server is in the wrong), httplib.py should turn the ValueError into an HTTPException. Perhaps it should define a new exception class for low-level protocol errors (bad chunking). Maybe it should reuse IncompleteRead. Observation #2: gee, my web browser doesn't barf on this response, so why should httplib.py? If there is an error here, it's at EOF, so it's not that big a deal. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1486335&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
