haproxy/CHANGELOG

ChangeLog :
===========

2003/04/02 : 1.1.18
  - Haproxy can be compiled with PCRE regex instead of libc regex, by setting
    REGEX=pcre on the make command line.
  - HTTP health-checks now use "OPTIONS *" instead of "OPTIONS /".
  - when explicit source address binding is required, it is now also used for
    health-checks.
  - added 'reqpass' and 'reqipass' to allow certain headers but not the request
    itself.
  - factored several strings to reduce binary size by about 2 kB.
  - replaced setreuid() and setregid() with more standard setuid() and setgid().
  - added 4 status flags to the log line indicating who ended the connection
    first, the sessions state, the validity of the cookie, and action taken on
    the set-cookie header.

2002/10/18 : 1.1.17
  - add the notion of "backup" servers, which are used only when all other
    servers are down.
  - make Set-Cookie return "" instead of "(null)" when the server has no
    cookie assigned (useful for backup servers).
  - "log" now supports an optionnal level name (info, notice, err ...) above
    which nothing is sent.
  - replaced some strncmp() with memcmp() for better efficiency.
  - added "capture cookie" option which logs client and/or server cookies
  - cleaned up/down messages and dump servers states upon SIGHUP
  - added a redirection feature for errors : "errorloc <errnum> <url>"
  - now we won't insist on connecting to a dead server, even with a cookie,
    unless option "persist" is specified.
  - added HTTP/408 response for client request time-out and HTTP/50[234] for
    server reply time-out or errors.

2002/09/01 : 1.1.16
  - implement HTTP health checks when option "httpchk" is specified.

2002/08/07 : 1.1.15
  - replaced setpgid()/setpgrp() with setsid() for better portability, because
    setpgrp() doesn't have the same meaning under Solaris, Linux, and OpenBSD.

2002/07/20 : 1.1.14
  - added "postonly" cookie mode

2002/07/15 : 1.1.13
  - tv_diff used inverted parameters which led to negative times !

2002/07/13 : 1.1.12
  - fixed stats monitoring, and optimized some tv_* for most common cases.
  - replaced temporary 'newhdr' with 'trash' to reduce stack size
  - made HTTP errors more HTML-fiendly.
  - renamed strlcpy() to strlcpy2() because of a slightly difference between
    their behaviour (return value), to avoid confusion.
  - restricted HTTP messages to HTTP proxies only
  - added a 502 message when the connection has been refused by the server,
    to prevent clients from believing this is a zero-byte HTTP 0.9 reply.
  - changed 'Cache-control:' from 'no-cache="set-cookie"' to 'private' when
    inserting a cookie, because some caches (apache) don't understand it.
  - fixed processing of server headers when client is in SHUTR state

2002/07/04 :
  - automatically close fd's 0,1 and 2 when going daemon ; setpgrp() after
    setpgid()

2002/06/04 : 1.1.11
  - fixed multi-cookie handling in client request to allow clean deletion
    in insert+indirect mode. Now, only the server cookie is deleted and not
    all the header. Should now be compliant to RFC2109.
  - added a "nocache" option to "cookie" to specify that we explicitly want
    to add a "cache-control" header when we add a cookie.
    It is also possible to add an "Expires: <old-date>" to keep compatibility
    with old/broken caches.

2002/05/10 : 1.1.10
  - if a cookie is used in insert+indirect mode, it's desirable that the
    the servers don't see it. It was not possible to remove it correctly
    with regexps, so now it's removed automatically.

2002/04/19 : 1.1.9
  - don't use snprintf()'s return value as an end of message since it may
    be larger. This caused bus errors and segfaults in internal libc's
    getenv() during localtime() in send_log().
  - removed dead insecure send_syslog() function and all references to it.
  - fixed warnings on Solaris due to buggy implementation of isXXXX().

2002/04/18 : 1.1.8
  - option "dontlognull"
  - fixed "double space" bug in config parser
  - fixed an uninitialized server field in case of dispatch
    with no existing server which could cause a segfault during
    logging.
  - the pid logged was always the father's, which was wrong for daemons.
  - fixed wrong level "LOG_INFO" for message "proxy started".

2002/04/13 :
  - http logging is now complete :
    - ip:port, date, proxy, server
    - req_time, conn_time, hdr_time, tot_time
    - status, size, request
  - source address

2002/04/12 : 1.1.7
  - added option forwardfor
  - added reqirep, reqidel, reqiallow, reqideny, rspirep, rspidel
  - added "log global" in "listen" section.

2002/04/09 :
  - added a new "global" section :
    - logs
    - debug, quiet, daemon modes
    - uid, gid, chroot, nbproc, maxconn

2002/04/08 : 1.1.6
  - regex are now chained and not limited anymore.
  - unavailable server now returns HTTP/502.
  - increased per-line args limit to 40
  - added reqallow/reqdeny to block some request on matches
  - added HTTP 400/403 responses

2002/04/03 : 1.1.5
  - connection logging displayed incorrect source address.
  - added proxy start/stop and server up/down log events.
  - replaced log message short buffers with larger trash.
  - enlarged buffer to 8 kB and replace buffer to 4 kB.

2002/03/25 : 1.1.4
  - made rise/fall/interval time configurable

2002/03/22 : 1.1.3
  - fixed a bug : cr_expire and cw_expire were inverted in CL_STSHUT[WR]
    which could lead to loops.

2002/03/21 : 1.1.2
  - fixed a bug in buffer management where we could have a loop
    between event_read() and process_{cli|srv} if R==BUFSIZE-MAXREWRITE.
    => implemented an adjustable buffer limit.
  - fixed a bug : expiration of tasks in wait queue timeout is used again,
    and running tasks are skipped.
  - added some debug lines for accept events.
  - send warnings for servers up/down.

2002/03/12 : 1.1.1
  - fixed a bug in total failure handling
  - fixed a bug in timestamp comparison within same second (tv_cmp_ms)

2002/03/10 : 1.1.0
  - fixed a few timeout bugs
  - rearranged the task scheduler subsystem to improve performance,
    add new tasks, and make it easier to later port to librt ;
  - allow multiple accept() for one select() wake up ;
  - implemented internal load balancing with basic health-check ;
  - cookie insertion and header add/replace/delete, with better strings
    support.

2002/03/08
  - reworked buffer handling to fix a few rewrite bugs, and
    improve overall performance.
  - implement the "purge" option to delete server cookies in direct mode.

2002/03/07
  - fixed some error cases where the maxfd was not decreased.

2002/02/26
  - now supports transparent proxying, at least on linux 2.4.

2002/02/12
  - soft stop works again (fixed select timeout computation).
  - it seems that TCP proxies sometimes cannot timeout.
  - added a "quiet" mode.
  - enforce file descriptor limitation on socket() and accept().

2001/12/30 : release of version 1.0.2 : fixed a bug in header processing
2001/12/19 : release of version 1.0.1 : no MSG_NOSIGNAL on solaris
2001/12/16 : release of version 1.0.0.
2001/12/16 : added syslog capability for each accepted connection.
2001/11/19 : corrected premature end of files and occasional SIGPIPE.
2001/10/31 : added health-check type servers (mode health) which replies OK then closes.
2001/10/30 : added the ability to support standard TCP proxies and HTTP proxies
		with or without cookies (use keyword http for this).
2001/09/01 : added client/server header replacing with regexps.
		eg:
       		cliexp ^(Host:\ [^:]*).* Host:\ \1:80
       		srvexp ^Server:\ .* Server:\ Apache
2000/11/29 : first fully working release with complete FSMs and timeouts.
2000/11/28 : major rewrite
2000/11/26 : first write