shorthand html

[cgilite] / cgi.sh

diff --git a/cgi.sh b/cgi.sh
index 124496e0895ed11bce06279906cad9ed2c51c2b7..f79d41635746e19ce821700ec9fe80a8956913a0 100755 (executable)
--- a/cgi.sh
+++ b/cgi.sh
@@ -1,6 +1,6 @@
 #!/bin/zsh
 
-# Copyright 2014,2015 Paul Hänsch
+# Copyright 2014 - 2016 Paul Hänsch
 #
 # This file is part of shcgi.
 # 
@@ -17,6 +17,7 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with shcgi.  If not, see <http://www.gnu.org/licenses/>. 
 
+unset _GET _POST _REF _COOKIE
 declare -A _GET
 declare -A _POST
 declare -A _REF
@@ -27,23 +28,25 @@ declare -A _COOKIE
 # parse HTTP GET string
 debug "== CGI DATA: GET =="
 printf '%s\n' "$QUERY_STRING" |tr '&' '\n' |while read query; do
-  key="$(printf %s "$query" |sed -r 's:^([a-zA-Z0-9_-]+)=(.*)$:\1:')"
-  val="$(printf %s "$query" |sed -r 's:^([a-zA-Z0-9_-]+)=(.*)$:\2:')"
+  key="$(printf %s "$query" |sed -r 's:^([\.a-zA-Z0-9_-]+)=(.*)$:\1:')"
+  val="$(printf %s "$query" |sed -r 's:^([\.a-zA-Z0-9_-]+)=(.*)$:\2:')"
   _GET[$key]="$(printf "$(printf %s "$val" |sed 's:+: :g;s:\\:\\\\:g;s:%:\\x:g')")"
   debug "_GET[$key] => $val"
 done
 
-if [ "$REQUEST_METHOD" = POST ]; then
+if [ "$REQUEST_METHOD" = POST -a "${HTTP_CONTENT_LENGTH:=$CONTENT_LENGTH}" -gt 0 ]; then
   # parse HTTP POST string
   debug "== CGI DATA: POST =="
-  sed -u 1q |tr '&' '\n' |while read query; do
-    key="$(printf %s "$query" |sed -r 's:^([a-zA-Z0-9_-]+)=(.*)$:\1:')"
-    val="$(printf %s "$query" |sed -r 's:^([a-zA-Z0-9_-]+)=(.*)$:\2:')"
+  head -c "$HTTP_CONTENT_LENGTH" \
+  | sed -un 's;&;\n;g; p; q' \
+  | while read query; do
+    key="$(printf %s "$query" |sed -r 's:^([\.a-zA-Z0-9_-]+)=(.*)$:\1:')"
+    val="$(printf %s "$query" |sed -r 's:^([\.a-zA-Z0-9_-]+)=(.*)$:\2:')"
     value="$(printf "$(printf %s "$val" |sed 's:+: :g;s:\\:\\\\:g;s:%:\\x:g;')")"
     n=''
-    if [ -n "${_POST[$key$n]}" ]; then
+    if [ -n "${_POST[$key$n]+x}" ]; then
       n=0
-      while [ -n "${_POST[$key$n]}" ]; do n=$(($n + 1)); done
+      while [ -n "${_POST[$key$n]+x}" ]; do n=$(($n + 1)); done
     fi
     _POST[$key$n]="$value"
     debug "_POST[$key$n] => $value"
@@ -53,8 +56,8 @@ fi
 cgi_refdata() { # Parse GET data from referer
   debug "== CGI DATA: REFERER =="
   printf '%s\n' "${HTTP_REFERER#*\?}" |tr '&' '\n' |while read query; do
-    key="$(printf %s "$query" |sed -r 's:^([a-zA-Z0-9_-]+)=(.*)$:\1:')"
-    val="$(printf %s "$query" |sed -r 's:^([a-zA-Z0-9_-]+)=(.*)$:\2:')"
+    key="$(printf %s "$query" |sed -r 's:^([\.a-zA-Z0-9_-]+)=(.*)$:\1:')"
+    val="$(printf %s "$query" |sed -r 's:^([\.a-zA-Z0-9_-]+)=(.*)$:\2:')"
     _REF[$key]="$(printf "$(printf %s "$val" |sed 's:+: :g;s:\\:\\\\:g;s:%:\\x:g')")"
     debug "_REF[$key] => $val"
   done
@@ -63,36 +66,69 @@ cgi_refdata() { # Parse GET data from referer
 cgi_cookie() { # Parse GET data from referer
   debug "== CGI DATA: COOKIE =="
   printf '%s\n' "$HTTP_COOKIE" |tr ';' '\n' |while read query; do
-    key="$(printf %s "$query" |sed -r 's:^ *([a-zA-Z0-9_-]+)=(.*)$:\1:')"
-    val="$(printf %s "$query" |sed -r 's:^ *([a-zA-Z0-9_-]+)=(.*)$:\2:')"
+    key="$(printf %s "$query" |sed -r 's:^ *([\.a-zA-Z0-9_-]+)=(.*)$:\1:')"
+    val="$(printf %s "$query" |sed -r 's:^ *([\.a-zA-Z0-9_-]+)=(.*)$:\2:')"
     _COOKIE[$key]="$(printf "$(printf %s "$val" |sed 's:+: :g;s:\\:\\\\:g;s:%:\\x:g')")"
     debug "_COOKIE[$key] => $val"
   done
 }
 
+htmlsafe(){
+  # escape HTML code from string
+
+  printf %s "$*" \
+  | sed 's;&;\&amp\;;g;
+         s;<;\&lt\;;g;
+         s;>;\&gt\;;g;
+         s;";\&quot\;;g;
+         s;/;\&#x2F\;;g;
+         s;'\'';\&#x27\;;g;'
+}
+
 urlsafe(){
+  # Code every character in URL escape hex format
+  # except alphanumeric ascii
+
   printf %s "$*" \
-  | sed 's;%;%25;g;
-         s;\?;%3f;g;
-         s;#;%23;g;
-         s;<;%3c;g;
-         s;>;%3e;g;
-         s;&;%26;g;
-         s;";%22;g;
-         s;'\'';%27;g;'
+  | hexdump -v -e '/1 ",%02X"' \
+  | tr , % \
+  | sed 's;%30;0;g; s;%31;1;g; s;%32;2;g; s;%33;3;g; s;%34;4;g; s;%35;5;g;
+         s;%36;6;g; s;%37;7;g; s;%38;8;g; s;%39;9;g;
+         s;%41;A;g; s;%42;B;g; s;%43;C;g; s;%44;D;g; s;%45;E;g; s;%46;F;g;
+         s;%47;G;g; s;%48;H;g; s;%49;I;g; s;%4A;J;g; s;%4B;K;g; s;%4C;L;g;
+         s;%4D;M;g; s;%4E;N;g; s;%4F;O;g; s;%50;P;g; s;%51;Q;g; s;%52;R;g;
+         s;%53;S;g; s;%54;T;g; s;%55;U;g; s;%56;V;g; s;%57;W;g; s;%58;X;g;
+         s;%59;Y;g; s;%5A;Z;g;
+         s;%61;a;g; s;%62;b;g; s;%63;c;g; s;%64;d;g; s;%65;e;g; s;%66;f;g;
+         s;%67;g;g; s;%68;h;g; s;%69;i;g; s;%6A;j;g; s;%6B;k;g; s;%6C;l;g;
+         s;%6D;m;g; s;%6E;n;g; s;%6F;o;g; s;%70;p;g; s;%71;q;g; s;%72;r;g;
+         s;%73;s;g; s;%74;t;g; s;%75;u;g; s;%76;v;g; s;%77;w;g; s;%78;x;g;
+         s;%79;y;g; s;%7A;z;g; s;%2D;-;g; s;%2E;.;g; s;%2F;/;g; s;%5F;_;g'
 }
 
-htmlsafe(){
+attribsafe(){
+  # Code every character in HTML escape hex format
+  # except alphanumerig ascii
+
   printf %s "$*" \
-  | sed 's;<;\&lt\;;g;
-         s;>;\&gt\;;g;
-         s;&;\&amp\;;g;
-         s;";\&quot\;;g;
-         s;'\'';\&apos\;;g;'
+  | iconv -f utf-8 -t utf32le \
+  | hexdump -v -e '/4 "&#x%02X;"' \
+  | sed 's;&#x30\;;0;g; s;&#x31\;;1;g; s;&#x32\;;2;g; s;&#x33\;;3;g; s;&#x34\;;4;g; s;&#x35\;;5;g;
+         s;&#x36\;;6;g; s;&#x37\;;7;g; s;&#x38\;;8;g; s;&#x39\;;9;g;
+         s;&#x41\;;A;g; s;&#x42\;;B;g; s;&#x43\;;C;g; s;&#x44\;;D;g; s;&#x45\;;E;g; s;&#x46\;;F;g;
+         s;&#x47\;;G;g; s;&#x48\;;H;g; s;&#x49\;;I;g; s;&#x4A\;;J;g; s;&#x4B\;;K;g; s;&#x4C\;;L;g;
+         s;&#x4D\;;M;g; s;&#x4E\;;N;g; s;&#x4F\;;O;g; s;&#x50\;;P;g; s;&#x51\;;Q;g; s;&#x52\;;R;g;
+         s;&#x53\;;S;g; s;&#x54\;;T;g; s;&#x55\;;U;g; s;&#x56\;;V;g; s;&#x57\;;W;g; s;&#x58\;;X;g;
+         s;&#x59\;;Y;g; s;&#x5A\;;Z;g;
+         s;&#x61\;;a;g; s;&#x62\;;b;g; s;&#x63\;;c;g; s;&#x64\;;d;g; s;&#x65\;;e;g; s;&#x66\;;f;g;
+         s;&#x67\;;g;g; s;&#x68\;;h;g; s;&#x69\;;i;g; s;&#x6A\;;j;g; s;&#x6B\;;k;g; s;&#x6C\;;l;g;
+         s;&#x6D\;;m;g; s;&#x6E\;;n;g; s;&#x6F\;;o;g; s;&#x70\;;p;g; s;&#x71\;;q;g; s;&#x72\;;r;g;
+         s;&#x73\;;s;g; s;&#x74\;;t;g; s;&#x75\;;u;g; s;&#x76\;;v;g; s;&#x77\;;w;g; s;&#x78\;;x;g;
+         s;&#x79\;;y;g; s;&#x7A\;;z;g;'
 }
 
 redirect(){
-  printf '%s\n\n' "Location: $*"
+  printf 'Status: 303 See Other\r\nLocation: %s\r\n\r\n' "$*"
   exit 0
 }
 
@@ -107,5 +143,5 @@ set_cookie(){
   printf 'Set-Cookie: %s' "$cookie"
   [ -n "$expire" ] && printf '; Expires=%s' "$expire" 
   [ $# -ge 3 ] && shift 2 && printf '; %s' "$@"
-  printf '\n'
+  printf '\r\n'
 }