tbnl-devel August 2011

tbnl-devel@common-lisp.net

3 participants
6 discussions

[hunchentoot-devel] Hunchentoot support for ECL
by Olivier Dumont 30 Oct '11

30 Oct '11

Hi, the attached patch allows hunchentoot to function properly with the latest release of ECL (11.1.1). best regards, Olivier

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[hunchentoot-devel] Hunchentoot Errors (e.g. Couldn't write to #<SB-SYS:FD-STREAM for "socket ..." ...>)
by Cyrus Harmon 30 Oct '11

30 Oct '11

Hello tbnl-folk, So, I've been seeing transient problems with hunchentoot for as long as I can remember, and I haven't had the chance to try to track down the problems until now. It seems there are a couple of classes of problems. In order of severity, the are: 1. things that crash hunchentoot/SBCL (or, in some cases, the host OS) 2. things that throw "unexpected" errors 3. things that throw "expected" errors (e.g. 404) As for class 1, these are tough to track down as the server is usually crashed by the time I get to it, but some causes I consider plausible are: * running out of some limited resource such as RAM, threads, or network sockets * possible SBCL bug in, say, signal handling or dealing with lots of threads I don't have any data to present on this class, at the moment, so let's move on to the next class. I often see errors such as this in the log: [2011-04-05 00:04:52 [ERROR]] Couldn't write to #<SB-SYS:FD-STREAM for "socket 74.115.254.12:80, peer: 217.72.218.248:2741" {B6FB859}>: Broken pipe 0: (SB-DEBUG::MAP-BACKTRACE #<CLOSURE (LAMBDA #) {B71EC4D}> :START 0 :COUNT 536870911) 1: (BACKTRACE 536870911 #<SB-IMPL::STRING-OUTPUT-STREAM {B71EBE9}>) 2: (TRIVIAL-BACKTRACE:PRINT-BACKTRACE-TO-STREAM #<SB-IMPL::STRING-OUTPUT-STREAM {B71EBE9}>) 3: (HUNCHENTOOT::GET-BACKTRACE) 4: ((FLET #:LAMBDA271) #<SB-INT:SIMPLE-STREAM-ERROR "~@<~?: ~2I~_~A~:>" {B71EA51}>) 5: (SIGNAL #<SB-INT:SIMPLE-STREAM-ERROR "~@<~?: ~2I~_~A~:>" {B71EA51}>) 6: (ERROR SB-INT:SIMPLE-STREAM-ERROR :STREAM #<SB-SYS:FD-STREAM for "socket 74.115.254.12:80, peer: 217.72.218.248:2741" {B6FB859}> :FORMAT-CONTROL "~@<~?: ~2I~_~A~:>" :FORMAT-ARGUMENTS ("Couldn't write to ~S" (#<SB-SYS:FD-STREAM for "socket 74.115.254.12:80, peer: 217.72.218.248:2741" {B6FB859}>) "Broken pipe")) 7: (SB-IMPL::SIMPLE-STREAM-PERROR "Couldn't write to ~S" #<SB-SYS:FD-STREAM for "socket 74.115.254.12:80, peer: 217.72.218.248:2741" {B6FB859}> 32) 8: (SB-IMPL::WRITE-OUTPUT-FROM-QUEUE #<SB-SYS:FD-STREAM for "socket 74.115.254.12:80, peer: 217.72.218.248:2741" {B6FB859}>) 9: (SB-IMPL::SUB-SUB-SERVE-EVENT NIL NIL) 10: (SB-IMPL::SUB-SERVE-EVENT NIL NIL NIL) 11: (SB-SYS:SERVE-ALL-EVENTS NIL) 12: (SB-IMPL::FINISH-FD-STREAM-OUTPUT #<SB-SYS:FD-STREAM for "socket 74.115.254.12:80, peer: 217.72.218.248:2741" {B6FB859}>) 13: (FINISH-OUTPUT #<SB-SYS:FD-STREAM for "socket 74.115.254.12:80, peer: 217.72.218.248:2741" {B6FB859}>) 14: (HUNCHENTOOT:HANDLE-STATIC-FILE #P"/home/sly/projects/www-cyrusharmon-org/static/images/fish-clusters.png" NIL) 15: ((SB-PCL::FAST-METHOD HUNCHENTOOT:HANDLE-REQUEST (HUNCHENTOOT:ACCEPTOR HUNCHENTOOT:REQUEST)) #<unavailable argument> #<unavailable argument> #<HUNCHENTOOT:ACCEPTOR (host *, port 80)> #<HUNCHENTOOT:REQUEST {B701D09}>) 16: ((SB-PCL::FAST-METHOD HUNCHENTOOT:PROCESS-REQUEST (T)) #<unavailable argument> #<unavailable argument> #<HUNCHENTOOT:REQUEST {B701D09}>) 17: ((SB-PCL::FAST-METHOD HUNCHENTOOT:PROCESS-CONNECTION (HUNCHENTOOT:ACCEPTOR T)) #<unavailable argument> #<unavailable argument> #<HUNCHENTOOT:ACCEPTOR (host *, port 80)> #<USOCKET:STREAM-USOCKET {B6FB8F1}>) 18: ((SB-PCL::FAST-METHOD HUNCHENTOOT:PROCESS-CONNECTION :AROUND (HUNCHENTOOT:ACCEPTOR T)) #<unavailable argument> #S(SB-PCL::FAST-METHOD-CALL :FUNCTION #<FUNCTION #> :PV NIL :NEXT-METHOD-CALL NIL :ARG-INFO (2)) #<HUNCHENTOOT:ACCEPTOR (host *, port 80)> #<USOCKET:STREAM-USOCKET {B6FB8F1}>) 19: ((LAMBDA ())) 20: ((FLET #:WITHOUT-INTERRUPTS-BODY-[BLOCK353]358)) 21: ((FLET SB-THREAD::WITH-MUTEX-THUNK)) 22: ((FLET #:WITHOUT-INTERRUPTS-BODY-[CALL-WITH-MUTEX]300)) 23: (SB-THREAD::CALL-WITH-MUTEX #<CLOSURE (FLET SB-THREAD::WITH-MUTEX-THUNK) {B0E14235}> #S(SB-THREAD:MUTEX :NAME "thread result lock" :%OWNER #<SB-THREAD:THREAD "Hunchentoot worker (client: 217.72.218.248:2741)" RUNNING {B6FCE39}> :STATE 1) #<SB-THREAD:THREAD "Hunchentoot worker (client: 217.72.218.248:2741)" RUNNING {B6FCE39}> T) 24: (SB-THREAD::INITIAL-THREAD-FUNCTION) 25: ("foreign function: call_into_lisp") 26: ("foreign function: funcall0") 27: ("foreign function: new_thread_trampoline") 28: ("foreign function: #xB7FC5506") What does this whole "broken pipe" mean? Is this more of an "expected error" or is something going wrong here? On a slightly different note, I'd like to be able to run a relatively reliable hunchentoot server that can serve a modest traffic load without having to resort to caching proxy servers and the like. I recall some discussion of thread pools, epoll, etc... Has the state of the art for high-reliability hunchentoot instances changed in the last couple years? Any suggestions on improving it? thanks! Cyrus

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[hunchentoot-devel] Garbage in REPL
by Andrey Moskvitin 30 Oct '11

30 Oct '11

Hi, For ACCESS-LOG-DESIGNATION default value is *ERROR-OUTPUT*. It is the cause of littering REPL for SLIME users. Maybe better use NIL as default and for suppress logging use a keyword :suppress? (defmethod acceptor-access-log-destination ((acceptor acceptor)) (let ((destination (slot-value acceptor 'access-log-destination))) (case destination ((nil) *error-output*) (:suppress nil) (otherwise destination)))) In this case, the logging will be sent to *inferior-lisp* and will not interfere with. Andrey

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[hunchentoot-devel] socket-connector and ssl-socket-connector?
by Cyrus Harmon 29 Sep '11

29 Sep '11

I've been playing around with some changes to ACCEPTOR and friends that introduce the new classes SOCKET-CONNECTOR and SSL-SOCKET-CONNECTOR. The purpose of these changes are to take the specialized socket handling behavior out of the acceptor and into another class, such that subclassing acceptor isn't required to, say, use SSL streams. As a motivating example, consider the following: (hunchentoot:start (make-instance 'hunchentoot:easy-acceptor :port 4243 :socket-connector (make-instance 'hunchentoot::ssl-socket-connector :ssl-certificate-file (asdf:system-relative-pathname :hunchentoot "ssl/certificate.pem") :ssl-privatekey-file (asdf:system-relative-pathname :hunchentoot "ssl/key.pem")))) (hunchentoot:define-easy-handler (say-yo :uri "/yo") (name) (setf (hunchentoot:content-type*) "text/plain") (format nil "Hey~@[ ~A~]!" name)) Without these changes, one would have to subclass both easy-acceptor and ssl-acceptor in order to have an SSL-using easy acceptor. Comments/suggestions greatly appreciated. The changes can be found in the git repo at: https://github.com/slyrus/hunchentoot/tree/socket-connector and in the attached patch. Cyrus

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[hunchentoot-devel] Hunchentoot development is moving to github
by Hans Hübner 03 Sep '11

03 Sep '11

Hi, effective immediately, Hunchentoot development is going on in github: https://github.com/edicl/hunchentoot - The BKNR subversion repository will be closed in a while, and github will be the authoritative source for development versions. Feel free to fork, send pull requests, open issues and discuss commits. The "edicl" organization on github also has repository for several other libraries that Edi has written. No current development plans exist, but if you have enhancements to any of these libraries, pull requests are welcome. -Hans

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[hunchentoot-devel] Two bugs in development head (stable version unaffected)
by Wukix Inc. 29 Aug '11

29 Aug '11

Hello All, We have become aware of what seems to be two bugs in Hunchentoot svn head (stable version is unaffected). The first one was discovered by, and should be credited to J.P. Larocque. The issue is that not only is Content-Range unnecessarily included in HTTP responses, but the upper value of the range is off by 1. For example, look at these response headers: < HTTP/1.1 200 OK < Content-Length: 14260 < Content-Range: bytes 0-14260/* J.P.'s analysis follows: =============== Content-Range appears in response, but the status code is 200 rather than 206 (Partial Content). That's odd, but not illegal as far as I can tell. But the Content-Length is definitely inconsistent with the Content-Range. HTTP 1.1 byte ranges are inclusive: The last-byte-pos value gives the byte-offset of the last byte in the range; that is, the byte positions specified are inclusive. Byte offsets start at zero. -- HTTP 1.1 14.35.1 Byte Ranges http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35 So a range of [0,14260] indicates a length of 14261 bytes, but that's different from the Content-Length value. =============== The second issue, which was our own discovery, is that the content-type will be incorrect when serving a 304 (Not Modified) response. The content-type issue can be reproduced in Chrome/Chromium with the developer tools enabled. Basically, request some page while viewing the network tab. When you hit refresh (triggering status 304 instead of first visit 200), you will see the content type will be incorrect for images, javascript, or any other non-html. The content-type issue seems to be caused by a change to the order of operations within handle-static-file of misc.lisp. The content type needs to be set before before calling handle-if-modified-since, which could otherwise abort before the proper content type is set. Both of these issues can be fixed by reverting to an earlier version of misc.lisp. As we already mentioned, the stable version of Hunchentoot is not affected. Thanks, The Team at Wukix, Inc.

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tbnl-devel August 2011