The OpenNET Project / Index page

[ новости /+++ | форум | wiki | теги | ]

Интерактивная система просмотра системных руководств (man-ов)

 ТемаНаборКатегория 
 
 [Cписок руководств | Печать]

accf_http ()
  • >> accf_http (9) ( FreeBSD man: Ядро )

  • BSD mandoc
     

    NAME

    accf_http
    
     - buffer incoming connections until a certain complete HTTP requests arrive
    
     
    

    SYNOPSIS

    options INET
    options ACCEPT_FILTER_HTTP
    kldload accf_http  

    DESCRIPTION

    This is a filter to be placed on a socket that will be using accept ();
    to receive incoming HTTP connections.

    It prevents the application from receiving the connected descriptor via accept ();
    until either a full HTTP/1.0 or HTTP/1.1 HEAD or GET request has been buffered by the kernel.

    If something other than a HTTP/1.0 or HTTP/1.1 HEAD or GET request is received the kernel will allow the application to receive the connection descriptor via accept (.);

    The utility of options INET is such that a server will not have to context switch several times before performing the initial parsing of the request. This effectively reduces the amount of required CPU utilization to handle incoming requests by keeping active processes in preforking servers such as Apache low and reducing the size of the file descriptor set that needs to be managed by interfaces such as select (,);
    poll ();
    or kevent ();
    based servers.

    The options INET kernel option is also a module that can be enabled at runtime via kldload(8) if the INET option has been compiled into the kernel.  

    EXAMPLES

    Assuming ACCEPT_FILTER_HTTP has been included in the kernel config file or the options INET module has been loaded, this will enable the http accept filter on the socket Fa sok .
            struct accept_filter_arg afa;
    
            bzero(&afa, sizeof(afa));
            strcpy(afa.af_name, "httpready");
            setsockopt(sok, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa));
    
     

    SEE ALSO

    setsockopt(2), accept_filter9  

    HISTORY

    The accept filter mechanism and the accf_http filter were introduced in Fx 4.0 .  

    AUTHORS

    This manual page and the filter were written by An Alfred Perlstein .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    EXAMPLES
    SEE ALSO
    HISTORY
    AUTHORS


    Поиск по тексту MAN-ов: 




    Спонсоры:
    Inferno Solutions
    Hosting by Hoster.ru
    Хостинг:

    Закладки на сайте
    Проследить за страницей
    Created 1996-2021 by Maxim Chirkov
    Добавить, Поддержать, Вебмастеру