ref: 141fdd0d4392abdcb6a29f1ee1e8381e28abddad
dir: /bin/cgilib.rc/
##############################################
# Useful CGI functions
NEW_LINE = '
'
fn dprint { echo $* >[1=2] }
fn escape_html { sed 's/&/\&/g; s/</\</g; s/>/\>/g' $* }
fn perm_redirect {
echo 'Status: 301 Moved Permanantly
Location: '^$1^'
'
exit
}
fn get_post_args {
if(~ $#POST_ARGS 0) {
ifs='&
' for(pair in `{cat}) {
pair = `{echo -n $pair | sed 's/=/\&/'} \
# Maybe we should urldecode on the first pass?
POST_ARGS = ($POST_ARGS $pair)
ifs=() \
if(~ $pair(1) $*)
$pair(1) = `{echo -n $pair(2) | urldecode | tr -d '
'}
}
}
if not {
pa = $POST_ARGS
while(! ~ $#pa 0) {
ifs=() \
if(~ $pa(1) $*)
$pa(1) = `{echo -n $pa(2) | urldecode | tr -d '
'}
pa = $pa(3-)
}
}
}
# Is this really useful?
fn awk_buffer {
awk '{
buf = buf $0"\n"
if(length(buf) > 8192) {
printf "%s", buf
buf = ""
}
}
END{ printf "%s", buf }'
}
fn urldecode {
awk '
BEGIN {
hextab ["0"] = 0; hextab ["8"] = 8;
hextab ["1"] = 1; hextab ["9"] = 9;
hextab ["2"] = 2; hextab ["A"] = hextab ["a"] = 10
hextab ["3"] = 3; hextab ["B"] = hextab ["b"] = 11;
hextab ["4"] = 4; hextab ["C"] = hextab ["c"] = 12;
hextab ["5"] = 5; hextab ["D"] = hextab ["d"] = 13;
hextab ["6"] = 6; hextab ["E"] = hextab ["e"] = 14;
hextab ["7"] = 7; hextab ["F"] = hextab ["f"] = 15;
}
{
decoded = ""
i = 1
len = length ($0)
while ( i <= len ) {
c = substr ($0, i, 1)
if ( c == "%" ) {
if ( i+2 <= len ) {
c1 = substr ($0, i+1, 1)
c2 = substr ($0, i+2, 1)
if ( hextab [c1] == "" || hextab [c2] == "" ) {
print "WARNING: invalid hex encoding: %" c1 c2 | "cat >&2"
} else {
code = 0 + hextab [c1] * 16 + hextab [c2] + 0
c = sprintf ("%c", code)
i = i + 2
}
} else {
print "WARNING: invalid % encoding: " substr ($0, i, len - i)
}
} else if ( c == "+" ) {
c = " "
}
decoded = decoded c
++i
}
printf decoded
}
'
}
fn crop_text {
max_chars = $0
awk -v max'='^$max_chars^' ' '
{
nc += 1 + length;
if(nc > max) {
print substr($0, 1, nc - max) "..."
exit
}
print
}'
}
# Cookies
fn set_cookie {
# TODO: should check input values more carefully
name = $1
val = $2
extraHttpHeaders = ($extraHttpHeaders 'Set-cookie: '^$"name^'='^$"val^'; path=/;')
}
fn get_cookie {
ifs=';' { co = `{ echo $HTTP_COOKIE } }
#for(c in $co)
# if(~ $c $1^'='*) # This matching doesn't work
# echo $c|sed 's/[^=]*=//'
# WARNING: we might be adding a trailing new line
{ for(c in $co) echo $c} | sed -n 's/[^=]*=//p'
}
##############################################
# More werc-specific functions
fn template { template.awk $* | rc $rcargs }
# .rec parsing
fn parse_rec {
ifs='
' for(i in `{sed 's/% *//g; /^$/q' < $1}) {
v = `{echo -n $i | sed 's/^/rec_/; s/=.*//;'}
$v = `{echo -n $i | sed 's/^[^=]*=//'}
}
ifs=() { rec_data = `{sed -n '/^[^%]./,$p' < $1} }
}
# Auth code
# Cookie format: WERC_USER: name:timestamp:hash(name.timestamp.password)
# login_user can't be used from a template because it sets a cookie
fn login_user {
# Note: get_user can use an existing cookie, so we might end up setting an existing cookie
if(get_user $*)
set_cookie werc_user $"logged_user^':0:'^$"logged_password
}
# Checks if we are logged in, if called with an argument, we check group membership too
fn check_user {
if(! get_user)
status='Not logged in'
if not if (! ~ $#1 0 && ! grep -s '^'^$logged_user^'$' etc/groups/$1)
status=User $logged_user not in group $1
if not
true
}
# If not logged in, try to get user login info from POST info or from cookie
fn get_user {
if (~ $#logged_user 0) {
if (~ $#* 2) {
user_name = $1
user_password $2
}
if not if(~ $REQUEST_METHOD POST)
get_post_args user_name user_password
if(~ $#user_name 0) {
ifs=':' { cu = `{get_cookie werc_user|tr -d $NEW_LINE} }
if(! ~ $#cu 0) {
user_name = $cu(1)
user_password = $cu(3)
}
}
auth_user $user_name $user_password
}
if not
true
}
# Check if user_name and user_password represent a valid user account
# If valid, 'log in' by setting logged_user
fn auth_user {
user_name = $1
user_password = $2
pfile = 'etc/users/'^$"user_name^'/password'
if (~ $#user_name 0 || ~ $#user_password 0)
status='Auth: missing user name or pass: '^$"user_name^' / '^$"user_password
if not if(! test -f $pfile)
status='Auth: cant find '^$pfile
if not if (! ~ $user_password `{cat $pfile})
status='Auth: Pass '$user_password' doesnt match '^`{cat $pfile}
if not {
logged_user = $user_name
logged_password = $user_password
dprint Auth: success
}
}
# Blog stuff
fn make_blog_post {
bdir = $1
btitle = $2
btext = $3
if(! ~ 0 $#1 $#2 $#3) {
date=`{/bin/date +%F}
n = 1
for(f in $bdir^$date^'-'*) {
i = `{echo -n $f | sed -n 's,^.*/'$date'-([0-9]+)_.*,\1,p'|tr -d $NEW_LINE}
if(! ~ $#i 0 && test $i -ge $n)
n = `{hoc -e $i'+1'}
}
btitle = `{echo -n $"btitle | sed 's/[ ]+/_/g; 1q'}
echo $btext > $bdir^'/'^$"date^'-'^$"n^_$"btitle.md
}
if not
status=Missing blog post arguments $1 $2 $3
}
# --------
#
#app_blog_methods = ( _post index.rss )
#fn app_blog__post {
# echo
#}
#
#app_blog___default {
# if (~ $blog)
# call_app blogpost
#}
#
## --
#app_blogpost_methods = ( comment _edit )
#
#fn app_blogpost_comment {
# call_app comments
#}
#
## --
#app_comments_methods = ( _post _edit )
#
#fn app_comments___default {
#
#}