Lighttpd

After some checks I had found same issue with HTTP Proxy module -- the disconnect on client side is not reported to the server and may cause dangling connections on the server side.

So this is issue for proxy servers as well.

Simplest reproduction with mod_proxy.

Lighttpd configuration:

server.modules              = ("mod_proxy")
server.document-root        = "./" 

# mimetype mapping
mimetype.assign             = (
  ".gif"          =>      "image/gif",
  ".jpg"          =>      "image/jpeg",
  ".jpeg"         =>      "image/jpeg",
  ".png"          =>      "image/png",
  ".css"          =>      "text/css",
  ".html"         =>      "text/html",
  ".htm"          =>      "text/html",
  ".js"           =>      "text/javascript",
  ".xml"          =>      "text/xml",
  # default mime type
  ""              =>      "application/octet-stream",
)

server.port = 8080
server.bind = "0.0.0.0" 

proxy.server = ( "/hello" => ((
  "host" => "127.0.0.1",
  "port" => 8001
)))

Test no 1:

Run "dummy web server"

nc -l -p 8001

Run client

wget http://localhost:8001/hello

And hit Ctrl+C.

Observe, the dummy web server, prints headers and exits when wget is stopped.

Now start lighttpd with above configuration.

/usr/sbin/lighttpd -D -f light.conf

nc -l -p 8001

And now run wget via proxy:

wget http://localhost:8080/hello

Then press Ctrl+C

Observe:

nc prints headers but when wget is stopped it does not exits -- it is not aware that client has gone.