lighttpd does not send a 301 redirect immediately when proxying to Apache
I am using lighttpd as a proxy to an Apache backend. In MediaWiki if a 301 is issued, the redirect takes 15 seconds to complete. This is because by default Apache's KeepAlive timeout is 15 seconds; so lighttpd waits for the connection to be closed, when it should send the redirect to the client right away.
If I lower the keep alive of Apache, then it takes that number of seconds for the redirect to come to the client (eg, setting the keep alive timeout to 5 seconds makes the redirect take 5 seconds), so the problem is clearly that lighttpd waits until the connection is closed.
A redirect taking 15 seconds is of course problematic.
Note that with a 302, this behavior does not happen.
Tested under vanilla-1.4.28.
Updated by stbuehler about 12 years ago
Ok, i can reproduce it:
Run a "webserver" to generate 301 responses:
while true; do (echo -en 'HTTP/1.1 301 Moved Permanently\r\nLocation: XYZ\r\nContent-Length: 0\r\n\r\n'; cat) | nc -4 -v -l localhost 8080; echo Connection closed; done
(Press CTRL-D to close an accepted connection)
proxy.server = ( "" => ( ( "host" => "127.0.0.1", "port" => 8080 ) ) )
Updated by nitrox about 12 years ago
- Priority changed from High to Normal
Don´t use "High" if it isn´t a severe bug!
Normaly a Status: 301 + Location headers would be all thats needed. Though a manual link in the body section is for users whose browsers do not support this feature. So we need to wait for the body part.
Updated by stbuehler over 9 years ago
This isn't really a bug in lighttpd, as the (apache) backend should close the connection after it wrote all data; mod_proxy uses HTTP/1.0 and does not send "Connection:" (keep-alive) headers, so the backend (apache) must not use keep-alive connections.
Updated by stbuehler over 8 years ago
- Target version changed from 1.4.34 to 1.4.x
todo: close (backend) connection after response body was received, use content-length header
but: shouldn't be needed with HTTP/1.0 connections (which is all that mod_proxy supports) - probably in this case not directly apache's fault but some backend sending connection: keep-alive.
(sane) patches welcome.
Updated by gstrauss over 6 years ago
- Status changed from Reopened to Fixed
- Target version changed from 1.4.x to 1.4.40
lighttpd mod_proxy will now send explicit Connection: close with requests to backends, so this should no longer be an issue, as the backend Apache will shutdown the write end of its socket, and the lighttpd reverse proxy will get 0-byte read() (EOF), as mod_proxy expects, to signal end of response.
commit f56fe331e5a19debca7312a1e59f08cb7469e3e9 Author: Stefan Bühler <email@example.com> Date: Fri Mar 4 19:23:16 2016 +0000 [mod_proxy] use case-insensitive comparision to filter headers, send Connection: Close to backend (fixes #421) From: Stefan Bühler <firstname.lastname@example.org> git-svn-id: svn://svn.lighttpd.net/lighttpd/branches/lighttpd-1.4.x@3093 152afb58-edef-0310-8abb-c4023f1b3aa9
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