.TH RC-HTTPD 8
.SH NAME
rc-httpd \- HTTP server
.SH SYNOPSIS
.B rc-httpd/rc-httpd
.SH DESCRIPTION
.I Rc-httpd
serves the requested file or an index of files found under
a website's root directory, or, in the case of CGI, executes
a specified CGI program.
.SH CONFIGURATION
.PP
As all pieces of
.B rc-httpd
are shell scripts, configuration is achieved by setting variables
and adding, removing or modifying commands in various files.
.PP
.B rc-httpd
.PP
.I rc_httpd_dir
must be set to the root of the rc-httpd installation,
the directory containing the rc-httpd script.
.PP
.I path
must include
.I rc_httpd_dir/handlers
ahead of the base system's path elements.
.PP
.I cgi_path
is substituted for
.I path
when cgi scripts are run. (Be sure
to set
.I path
back in rc-based cgi scripts.)
.PP
.I extra_headers
is an optional list of strings to emit when sending http headers.
.PP
.I SERVER_PORT
is the port HTTP is to be served on.
.PP
.B select-handler
.PP
.I PATH_INFO
is the location relative to the website's root directory of the file
to be displayed.
Typically, the
.I location
from the incoming request is honored.
.PP
.I FS_ROOT
sets the root directory of the website.
.PP
.I NOINDEXFILE
instructs the
.B dir-index
module not to
look for
.B index.html
files, otherwise if an
.B index.html
file is found
.B dir-index
will exec
.B serve-static
to serve the file. At present there
is no module to serve an index file but not a directory.
.PP
If you do not want directory indexing at all, replace
.B static-or-index
with
.B serve-static,
which will report 503 forbidden for directories.
.PP
Multiple virtual hosts may be configured by creating conditional
statements that act upon the
.I SERVER_NAME
variable. Fine-grained control of specific request strings may
be configured via a similar method acting upon the
.I location
and/or other variables.
.PP
The
.I REMOTE_USER
variable provides a user identification string supplied by the
client as part of user authentication.
.SH EXAMPLES
The following examples demonstrate possible ways to configure
.BR select-handler.
.PP
Serve static files:
.RS
.EX
if(~ $SERVER_NAME 9front.org){
PATH_INFO=$location
FS_ROOT=/usr/sl/www/$SERVER_NAME
exec static-or-index
}
.EE
.RE
.PP
HTTP basic authentication:
.RS
.EX
if(~ $SERVER_NAME *restricted.org){
PATH_INFO=$location
FS_ROOT=/usr/kgb/www/$SERVER_NAME
authorize
if(~ $REMOTE_USER (glenda kgb))
exec static-or-index
error 401
}
.EE
.RE
.PP
CGI:
.RS
.EX
if(~ $SERVER_NAME *cat-v.org){
PATH_INFO=$location
FS_ROOT=/usr/sl/www/werc/sites/$SERVER_NAME
exec static-or-cgi /usr/sl/www/werc/bin/werc.rc
}
.EE
.RE
.PP
Custom error message for a denied URL:
.RS
.EX
fn do_error{
do_log $1
echo 'HTTP/1.1 '^$1^$cr
emit_extra_headers
echo 'Content-type: text/html'^$cr
echo $cr
echo '
'^$1^'
'^$1^'
'
echo $2
echo 'rc-httpd at' $SERVER_NAME ''
echo '
'
}
if(~ $location /v8.tar.bz2){
do_error '27b/6'
exit
}
.EE
.RE
.SH STARTUP
.I Rc-httpd
is run from a file in the directory scanned by
.IR listen (8),
or called as an argument to aux/listen1.
The program's standard error may be captured to a log file:
.RS
.EX
exec /rc/bin/rc-httpd/rc-httpd >>[2]/sys/log/www
.EE
.RE
.SH FILES
.TF /sys/lib/httpd.rewrite
.TP
.B /rc/bin/rc-httpd/rc-httpd
.TP
.B /rc/bin/rc-httpd/select-handler
.TP
.B /rc/bin/rc-httpd/handlers/authorize
.TP
.B /rc/bin/rc-httpd/handlers/cgi
.TP
.B /rc/bin/rc-httpd/handlers/dir-index
.TP
.B /rc/bin/rc-httpd/handlers/error
.TP
.B /rc/bin/rc-httpd/handlers/redirect
.TP
.B /rc/bin/rc-httpd/handlers/serve-static
.TP
.B /rc/bin/rc-httpd/handlers/static-or-cgi
.TP
.B /rc/bin/rc-httpd/handlers/static-or-index
.TP
.B /rc/bin/service/tcp80
.TP
.B /sys/log/www
.SH SOURCE
.B /rc/bin/rc-httpd
.SH "SEE ALSO"
.IR rc (1),
.IR listen (8)
.SH HISTORY
.I Rc-httpd
first appeared in 9front (February, 2013).