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Glenn Strauss 36ab0587c0 [stream] fstat() after open() to obtain file size
Common case is on non-empty files, and doing fstat() after open()
eliminates ToC-ToU between stat() and then open().  While file size
of the target file might still change, the fstat() is on the opened
file, and can not be on different file (which was possible with stat())

From: Glenn Strauss <gstrauss@gluelogic.com>

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README

========
lighttpd
========

-------------
a light httpd
-------------

:author: Jan Kneschke
:Date: $Date: 2004/11/03 22:25:54 $
:Revision: $Revision: 1.8 $

:abstract:
  lighttpd a secure, fast, compliant and very flexible web-server
  which has been optimized for high-performance environments. It has a very
  low memory footprint compared to other webservers and takes care of cpu-load.
  Its advanced feature-set (FastCGI, CGI, Auth, Output-Compression,
  URL-Rewriting and many more) make lighttpd the perfect webserver-software
  for every server that is suffering load problems.

:documentation:
  http://wiki.lighttpd.net/

the naming
----------

lighttpd is a __httpd__ which is

- fast as __light__ning and
- __light__ when it comes to memory consumption and system requirements

Features
--------

Network
```````

- IPv4, IPv6

Protocols
`````````

- HTTP/1.0 (http://www.ietf.org/rfc/rfc1945.txt)
- HTTP/1.1 (http://www.ietf.org/rfc/rfc2616.txt)
- HTTPS (provided by openssl)
- CGI/1.1 (http://CGI-Spec.Golux.Com/)
- FastCGI (http://www.fastcgi.com/devkit/doc/fcgi-spec.html)

Advanced Features
`````````````````

- load-balanced FastCGI
  (one webserver distributes requests to multiple PHP-servers via FastCGI)
- custom error pages (for Response-Code 400-599)
- virtual hosts
- directory listings
- streaming CGI and FastCGI
- URL-Rewriting
- HTTP-Redirection
- output-compression with transparent caching

FastCGI-Support
```````````````

- parses the Response-header and completes the HTTP-header accordingly
- Keep-Alive handling based on Content-Length header

PHP-Support
```````````

- same speed as or faster than apache + mod_php4
- handles various PHP bugs in the FastCGI SAPI
- includes a utility to spawn FastCGI processes (necessary for PHP 4.3.x)

Security features
`````````````````

- chroot(), set UID, set GID
- protecting docroot

HTTP/1.1 features
`````````````````

- Ranges (start-end, start-, -end, multiple ranges)
- HTTP/1.0 Keep-Alive + HTTP/1.1 persistent Connections
- methods: GET, HEAD, POST
- Last-Modified + If-Modified handling
- sends Content-Length if possible
- sends Transfer-Encoding: chunk, if Content-Length is not possible
- sends Content-Type
- on-the-fly output compression (deflate, gzip)
- authentication: basic and digest
  (http://www.ietf.org/rfc/rfc2617.txt)

HTTP/1.1 compliance
```````````````````

- Sends 206 for Range Requests
- Sends 304 for If-Modified Requests
- Sends 400 for missing Host on HTTP/1.1 requests
- Sends 400 for broken Request-Line
- Sends 411 for missing Content-Length on POST requests
- Sends 416 for "out-of-range" on Range: Header
- Sends 501 for request-method != (GET|POST|HEAD)
- Sends 505 for protocol != HTTP/1.0 or HTTP/1.1
- Sends Date: on every requests

Intended Audience
-----------------

- Ad-Server Front-Ends ("Banner-Schleuder")
  - delivering small files rapidly
- php-servers under high load
  (load-balancing the php-request over multiple PHP-servers)

Works with
----------

It has been tested to work with

- IE 6.0
- Mozilla 1.x
- Konqueror 3.1
  (for Keep-Alive/Persistent Connections, Accept-Encoding for PHP + gzip)
- wget
  (for Resuming)
- acrobat plugin
  (for multiple ranges)


Works on
--------

lighttpd has been verified to compile and work on

- Linux
- FreeBSD
- NetBSD
- Solaris 8 + 9
- SGI IRIX 6.5

missing for HTTP/1.1 compliance
-------------------------------
- parsing chunked POST request

-----------------
Starting lighttpd
-----------------

As daemon in the background: ::

  $ lighttpd -f <configfile>

or without detaching from the console: ::

  $ lighttpd -D -f <configfile>