Code-Schnipsel QUERY STRING eval fff: Unterschied zwischen den Versionen
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| (9 dazwischenliegende Versionen desselben Benutzers werden nicht angezeigt) | |||
| Zeile 1: | Zeile 1: | ||
| + | =Code= | ||
<pre> | <pre> | ||
| − | + | fkt_eval_query_string () { | |
| − | + | local INPUT="$QUERY_STRING" | |
| − | |||
| − | |||
| − | |||
| − | |||
| − | + | test -z "$INPUT" && return | |
| − | + | ||
| − | + | local SANITIZED="$(echo $INPUT | sed -e 's/[^%&=+-:!,@\\"-_a-z~]//g')" | |
| − | + | local ESCAPED="$(httpd -d $SANITIZED | sed -e 's/"/\\"/g' -e 's/=/="/g' -e 's/&/";/g ' -e 's/$/"/g')" | |
| − | + | ||
| − | + | eval $ESCAPED 2>/dev/null | |
| − | |||
} | } | ||
</pre> | </pre> | ||
| + | |||
| + | =Code_alt (haesslich,aber tricky!)= | ||
| + | <pre> | ||
| + | fkt_decode_url () { # SENS: convert encoded URL to normal (e.g. %20 = space , %40 = @-Symbol ) | ||
| + | s=$(echo "$1" | sed -e "s/+/%20/g") # ARG1: (maybe) dirty string | ||
| + | echo -n ${s%%%*} # OUT1: unescaped string | ||
| + | |||
| + | if [ -n "$s" ] && [ "$s" != "${s#*%}" ]; then | ||
| + | IFS=\% | ||
| + | set ${s#*%} | ||
| + | unset IFS | ||
| + | |||
| + | for i in "$@"; do | ||
| + | echo -n -e "\\x$(echo $i | dd bs=1 count=2 2>&-)" | ||
| + | echo -n ${i#??} | ||
| + | done | ||
| + | fi | ||
| + | } | ||
| + | |||
| + | fkt_read_browsers_query_string () { # SENS: read and sanitize/convert query-string to useable vars (e.g. ?A=1&B=2 changes to correct setted vars A and B) | ||
| + | # ARG1: string, query string | ||
| + | local QUERY_STRING="$1" | ||
| + | local DAEMON="fkt_read_browsers_query_string" | ||
| + | local VARS="" | ||
| + | |||
| + | if [ -z "$QUERY_STRING" ]; then | ||
| + | fkt_log "$DAEMON" "Zero query!" 1 | ||
| + | return | ||
| + | else | ||
| + | fkt_log "$DAEMON" "Exploring query \"$QUERY_STRING\"" 1 | ||
| + | fi | ||
| + | |||
| + | IFS=\& | ||
| + | set ${QUERY_STRING%%[^%&=+-:@-_a-z~]*} | ||
| + | unset IFS | ||
| + | fkt_log "$DAEMON" "Escaping query \"$*\"" 1 | ||
| + | VARS="$(echo $* | sed -e 's/ /"; /g' -e 's/=/="/g' -e 's/$/"/g')" | ||
| + | fkt_log "$DAEMON" "Escaping query \"$VARS\"" 1 | ||
| + | VARS="$(httpd -d "$VARS")" | ||
| + | fkt_log "$DAEMON" "Evaluating query \"$VARS\"" 1 | ||
| + | eval "$VARS" | ||
| + | } | ||
| + | </pre> | ||
| + | |||
| + | =Erklaerung= | ||
| + | * aus dieser URL (POST/GET egal) | ||
| + | ** <tt> NODE=512&HOST=silber2&LOCA=Steinbr&GPSX=11.3313&GPSY=50.9934&MAIL=bla%40blub.org&PHON=0110%2F123456&MENU=expert&GOGO=%DCbernehmen"</tt> | ||
| + | * wird ein | ||
| + | ** <tt>NODE="512"; HOST="silber2"; LOCA="Steinbr"; GPSX="11.3313"; GPSY="50.9934"; MAIL="bla@blub.org"; PHON="0110/123456"; MENU="expert"; GOGO="Übernehmen"</tt> | ||
| + | * mit eval wird das ganze dann uebernommen und steht zur Verfuegung | ||
Aktuelle Version vom 27. Juli 2007, 13:33 Uhr
Code
fkt_eval_query_string () {
local INPUT="$QUERY_STRING"
test -z "$INPUT" && return
local SANITIZED="$(echo $INPUT | sed -e 's/[^%&=+-:!,@\\"-_a-z~]//g')"
local ESCAPED="$(httpd -d $SANITIZED | sed -e 's/"/\\"/g' -e 's/=/="/g' -e 's/&/";/g ' -e 's/$/"/g')"
eval $ESCAPED 2>/dev/null
}
Code_alt (haesslich,aber tricky!)
fkt_decode_url () { # SENS: convert encoded URL to normal (e.g. %20 = space , %40 = @-Symbol )
s=$(echo "$1" | sed -e "s/+/%20/g") # ARG1: (maybe) dirty string
echo -n ${s%%%*} # OUT1: unescaped string
if [ -n "$s" ] && [ "$s" != "${s#*%}" ]; then
IFS=\%
set ${s#*%}
unset IFS
for i in "$@"; do
echo -n -e "\\x$(echo $i | dd bs=1 count=2 2>&-)"
echo -n ${i#??}
done
fi
}
fkt_read_browsers_query_string () { # SENS: read and sanitize/convert query-string to useable vars (e.g. ?A=1&B=2 changes to correct setted vars A and B)
# ARG1: string, query string
local QUERY_STRING="$1"
local DAEMON="fkt_read_browsers_query_string"
local VARS=""
if [ -z "$QUERY_STRING" ]; then
fkt_log "$DAEMON" "Zero query!" 1
return
else
fkt_log "$DAEMON" "Exploring query \"$QUERY_STRING\"" 1
fi
IFS=\&
set ${QUERY_STRING%%[^%&=+-:@-_a-z~]*}
unset IFS
fkt_log "$DAEMON" "Escaping query \"$*\"" 1
VARS="$(echo $* | sed -e 's/ /"; /g' -e 's/=/="/g' -e 's/$/"/g')"
fkt_log "$DAEMON" "Escaping query \"$VARS\"" 1
VARS="$(httpd -d "$VARS")"
fkt_log "$DAEMON" "Evaluating query \"$VARS\"" 1
eval "$VARS"
}
Erklaerung
- aus dieser URL (POST/GET egal)
- NODE=512&HOST=silber2&LOCA=Steinbr&GPSX=11.3313&GPSY=50.9934&MAIL=bla%40blub.org&PHON=0110%2F123456&MENU=expert&GOGO=%DCbernehmen"
- wird ein
- NODE="512"; HOST="silber2"; LOCA="Steinbr"; GPSX="11.3313"; GPSY="50.9934"; MAIL="bla@blub.org"; PHON="0110/123456"; MENU="expert"; GOGO="Übernehmen"
- mit eval wird das ganze dann uebernommen und steht zur Verfuegung