#!/bin/sh
-# $0 [server] ([selector]) ([port]) ([mode])
-# server: the gopher server to dig to
-# selector: the gopher selector (default is empty)
-# port: the port to use (default is 70)
-# mode: the filetype mode (default depends upon selector)
-# 0: plain text
-# 1: menu (dir-like)
-# ...
-# download: fake mode to download the result without changes
+# $0 [gopher uri] ([mode])
+# uri: the gopher URI to dig to, e.g.:
+# - gopher://sdf.org:70/1/faq
+# - sdf.org/faq
+# - sdf.org/1/faq
+# - http://gopher.nikiroo.be:80/news
+# - ...
+# default port is 70 for gopher, 80 for http, 443 for https
+# default filetype depends upon selector:
+# - 0: plain text
+# - 1: menu (dir-like)
+# - ...
+# - download: fake mode to download the result without changes
+
+# Manual:
+# When asked for a number, you can also enter 'n' or 'p' to get the
+# next or previous item (+1 or -1)
# ENV variables:
-# USE_DIALOG: force the usage of the command 'dialog'
-# : true if dialog is found
-# 0 : do not
-# 1 : force the use of dialog
# LINK_COLOR: escape sequences colour (def: 2)
# - : means no escape sequence
# 1 : means colour 1
# 0 : do not invert (default)
# 1 : invert
-SERVER="$1"
-SELECTOR="$2"
-PORT="$3"
-MODE="$4"
+# EXIT Codes:
+# 0: ok
+# 1: syntax error
+# 2: cannot contact server
+# 3: unknown selector mode
+# 255: special exit more 'q'
+
+URI="$1"
+
+PREFIX="[0-9hIg+]"
+
+PROTOCOL="`echo $URI | sed 's|^\([^:]*://\)\?\([^:/]*\)\(:[^/]*\)\?/\?\(.*\)\?|\1|g'`"
+SERVER="`echo $URI | sed 's|^\([^:]*://\)\?\([^:/]*\)\(:[^/]*\)\?/\?\(.*\)\?|\2|g'`"
+PORT="`echo $URI | sed 's|^\([^:]*://\)\?\([^:/]*\)\(:[^/]*\)\?/\?\(.*\)\?|\3|g'`"
+SELECTOR="`echo $URI | sed 's|^\([^:]*://\)\?\([^:/]*\)\(:[^/]*\)\?/\?\(.*\)\?|\4|g'`"
+MODE=
+
+PORT="`echo "$PORT" | sed 's/^://'`"
# Defaults:
-[ "$PORT" = "" ] && PORT=70
+if [ "$PORT" = "" ];then
+ case "$PROTOCOL" in
+ http://) PORT=80 ;;
+ https://) PORT=443;;
+ *) PORT=70 ;;
+ esac
+fi
+
if [ "$MODE" = "" ]; then
# "" or dir-like selector? -> 1 ; if not -> 0
echo "$SELECTOR" | grep "/$" >/dev/null && MODE=1 || MODE=0
[ "$SELECTOR" = "" ] && MODE=1
+
+ # check explicit modes:
+ if echo "$SELECTOR" | grep "^/\?\($PREFIX\|download\)/" >/dev/null; then
+ MODE="`echo "$SELECTOR" | sed 's:^/\?\([^/]*\)/\(.*\):\1:'`"
+ SELECTOR="`echo "$SELECTOR" | sed 's:^/\?\([^/]*\)/\(.*\):\2:'`"
+ fi
fi
if [ "$SERVER" = "" ]; then
- echo "Syntax error: $0 [SERVER] ([SELECTOR]) ([PORT]) ([MODE])" >&2
- exit 2
+ echo "Syntax error: $0 [gopher uri]" >&2
+ exit 1
fi
# can be "-" for no escape sequences
if [ "$LINK_COLOR" != "-" ]; then
SL="`tput setf $LINK_COLOR``tput setaf $LINK_COLOR`"
EL="`tput init`"
- export LESS="${LESS}-R"
-fi
-
-# 'dialog' or text
-if [ "$USE_DIALOG" = "" ]; then
- if dialog --help >/dev/null 2>&1; then
- USE_DIALOG=1
- else
- USE_DIALOG=0
- fi
+ export LESS="${LESS} -R"
fi
# Invert image viewer
INVERT=
fi
-PREFIX="[0-9hIg+]"
-
-# $0 [FILE] (dialog)
+# $0 [FILE]
# Display a gopher menu for the given resource
cat_menu() {
i=0
- cat "$1" | grep "^i\|^$PREFIX" | while read ln; do
+ cat "$1" | grep "^i\|^$PREFIX" | sed 's:\\:\\\\\\\\:g' | while read ln; do
if echo "$ln" | grep "^i" >/dev/null 2>&1; then
- if [ "$2" != dialog ]; then
- echo "$ln" | sed "s:^.\([^\t]*\).*$: \1:g"
- else
- echo "$ln" | sed 's:":'"''"':g;s:^.\([^\t]*\).*$:" " "\1":g'
- fi
+ echo "$ln" | sed "s:^.\([^\t]*\).*$: \1:g"
elif echo "$ln" | grep "^$PREFIX" >/dev/null 2>&1; then
i=`expr $i + 1`
[ $i -le 9 ] && i=0$i
+) typ='SVR';; # redundant server
*) typ='!!!';;
esac
- if [ "$2" != dialog ]; then
- echo "$ln" | sed "s:^.\\([^\t]*\\).*:$typ $i $SL\\1$EL:g"
- else
- echo "$ln" | sed "s:"'"'":'':g;s:^.\\([^\t]*\\).*:"'"'"$typ $i"'"'" "'"\1"'":g"
- fi
+ echo "$ln" | sed "s:^.\\([^\t]*\\).*:$typ $i $SL\\1$EL:g"
fi
done
}
}
trap finish EXIT
-if [ $MODE = 1 ]; then
- echo "$SELECTOR" | nc "$SERVER" "$PORT" | sed 's:\r::g' > "$tmp"
+ok=true
+if [ "$PROTOCOL" = gopher:// -o "$PROTOCOL" = "" ]; then
+ echo "$SELECTOR" | nc "$SERVER" "$PORT" > "$tmp" || ok=false
else
- echo "$SELECTOR" | nc "$SERVER" "$PORT" > "$tmp"
+ if wget -h >/dev/null 2>&1; then
+ wget "${PROTOCOL}$SERVER:$PORT/$SELECTOR" -O "$tmp" >/dev/null 2>&1
+ else
+ curl "${PROTOCOL}$SERVER:$PORT/$SELECTOR" > "$tmp" 2>/dev/null
+ fi
+fi
+
+if [ $ok = false ]; then
+ echo Cannot contact gopher uri "[$URI]" >&2
+ exit 2
+fi
+
+if [ $MODE = 1 ]; then
+ sed --in-place 's:\r\n:\n:g;s:\r::g' "$tmp"
fi
# Process page content
cat "$tmp" | less
;;
1|+)
- CHOICE=start
+ CHOICE=0
while [ "$CHOICE" != "" ]; do
- if [ "$USE_DIALOG" = 1 ]; then
- > "$tmp.menu"
- cat_menu "$tmp" dialog | while read ln; do
- echo -n " $ln" >> "$tmp.menu"
- done
- [ "$LINES" = "" ] && LINES=`tput lines`
- [ "$COLUMNS" = "" ] && COLUMNS=`tput cols`
- title="$SERVER: $SELECTOR"
- dialog --extra-button --extra-label Back \
- --cancel-label Exit \
- --no-shadow \
- --menu "$title" \
- "$LINES" "$COLUMNS" "$LINES" \
- --file "$tmp.menu" 2>"$tmp.choice"
- val=$?
- clear
-
- if [ $val = 3 ]; then
- CHOICE=""
- elif [ $val = 1 ]; then
- CHOICE="q"
- else
- CHOICE="`cat "$tmp.choice" | cut -c5-`"
+ cat_menu "$tmp" | less
+ read -p "[$SELECTOR]: " NEW_CHOICE
+ if [ "$NEW_CHOICE" = p ]; then
+ CHOICE=`expr "$CHOICE" - 1 2>/dev/null`
+ if [ "$CHOICE" -lt 0 ]; then
+ CHOICE=`cat "$tmp" | grep "^$PREFIX" | wc --lines`
fi
-
- rm "$tmp.menu"
- rm "$tmp.choice"
+ elif [ "$NEW_CHOICE" = n ]; then
+ CHOICE=`expr "$CHOICE" + 1 2>/dev/null`
else
- cat_menu "$tmp" | less
- read -p "[$SELECTOR]: " CHOICE
+ CHOICE="$NEW_CHOICE"
fi
[ "$CHOICE" = q ] && exit 255 # force-quit
goto_sel="`getsel "$tmp" $index 2`"
goto_port="`getsel "$tmp" $index 4`"
goto_mode="`getsel "$tmp" $index 1 | cut -c1`"
- echo "Digging to [$goto_server:$goto_port] [$goto_sel]..."
- sh "$0" "$goto_server" "$goto_sel" "$goto_port" "$goto_mode"
+ echo "Digging to [$goto_server:$goto_port] $index [$goto_sel]..."
+ sh "$0" "$goto_server:$goto_port/$goto_mode/$goto_sel"
[ $? = 255 ] && exit 255 # force-quit
fi
done