#!/bin/sh
+# $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:
# LINK_COLOR: escape sequences colour (def: 2)
# - : means no escape sequence
# 1 : means colour 1
# 2 : means colour 2
# [...]
+# INVERT : invert the output for image viewing (for white backgrounds)
+# 0 : do not invert (default)
+# 1 : invert
+
+# EXIT Codes:
+# 0: ok
+# 1: syntax error
+# 2: cannot contact server
+# 3: unknown selector mode
+# 255: special exit more 'q'
+
+URI="$1"
-SERVER="$1"
-SELECTOR="$2"
-PORT="$3"
-MODE="$4"
+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: $0 [gopher uri]" >&2
+ exit 1
fi
# can be "-" for no escape sequences
EL=
if [ "$LINK_COLOR" != "-" ]; then
SL="`tput setf $LINK_COLOR``tput setaf $LINK_COLOR`"
- EL="`tput init`";
+ EL="`tput init`"
+ export LESS="${LESS} -R"
+fi
+
+# Invert image viewer
+if [ "$INVERT" = 1 ]; then
+ INVERT="--invert"
+else
+ INVERT=
fi
# $0 [FILE]
# Display a gopher menu for the given resource
cat_menu() {
i=0
- cat "$1" | grep '^[i0-9]' | while read ln; do
- ln="`echo "$ln" | cut -f1`"
+ cat "$1" | grep "^i\|^$PREFIX" | sed 's:\\:\\\\\\\\:g' | while read ln; do
if echo "$ln" | grep "^i" >/dev/null 2>&1; then
- echo "$ln" | sed "s:^.: :g"
- elif echo "$ln" | grep "^[0-9]" >/dev/null 2>&1; then
+ echo "$ln" | sed "s:^.\([^\t]*\).*$: \1:g"
+ elif echo "$ln" | grep "^$PREFIX" >/dev/null 2>&1; then
i=`expr $i + 1`
- i=`printf %2.f $i`
+ [ $i -le 9 ] && i=0$i
field="`echo "$ln" | cut -c1`"
case "$field" in
0) typ='TXT';;
- 1) typ='DIR';;
- 7) typ='(?)';;
- 8) typ='TEL';;
+ 1) typ='DIR';; # menu, actually
+ 7) typ='(?)';; # query
+ 8) typ='TEL';; # TELnet (not TELephone)
+ h) typ='WEB';; # HTML
+ I) typ='IMG';;
+ g) typ='GIF';;
+ +) typ='SVR';; # redundant server
*) typ='!!!';;
esac
- echo "$ln" | sed "s:^.\\(.*\\):$typ $i $SL\\1$EL:g"
- #else
- # Bad line
+ echo "$ln" | sed "s:^.\\([^\t]*\\).*:$typ $i $SL\\1$EL:g"
fi
done
}
# 3 = server
# 4 = port
getsel() {
- cat "$1" | grep '^[0-9]' | tail -n+"$2" | head -n 1 | cut -f"$3"
+ cat "$1" | grep "^$PREFIX" | tail -n+"$2" | head -n 1 | cut -f"$3"
}
+# Save page content to 'tmp' file
tmp="`mktemp -t gofetch.current_page.XXXXXX`"
finish() {
- rm -rf "$tmp"
+ rm -rf "$tmp" "$tmp.jpg" "$tmp.menu" "$tmp.choice"
}
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
case "$MODE" in
+download)
+ # Special, fake mode, only from top-level
+ cat "$tmp"
+;;
0)
cat "$tmp" | less
;;
-1)
- CHOICE=start
+1|+)
+ CHOICE=0
while [ "$CHOICE" != "" ]; do
cat_menu "$tmp" | less
- read -p "[$SELECTOR]: " CHOICE
+ 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
+ elif [ "$NEW_CHOICE" = n ]; then
+ CHOICE=`expr "$CHOICE" + 1 2>/dev/null`
+ else
+ CHOICE="$NEW_CHOICE"
+ fi
+
+ [ "$CHOICE" = q ] && exit 255 # force-quit
index="`expr 1 \* "$CHOICE" 2>/dev/null`"
if [ "$index" != "" ]; then
goto_server="`getsel "$tmp" $index 3`"
goto_sel="`getsel "$tmp" $index 2`"
goto_port="`getsel "$tmp" $index 4`"
goto_mode="`getsel "$tmp" $index 1 | cut -c1`"
- 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
;;
9)
echo "<BINARY FILE>" | less
;;
+g|I)
+ if img2aa --help >/dev/null 2>&1; then
+ img2aa --mode=DITHERING \
+ $INVERT \
+ --width=74 "$tmp" | less
+ elif jp2a -h >/dev/null 2>&1; then
+ if convert -h >/dev/null 2>&1; then
+ convert "$tmp" "$tmp.jpg"
+ jp2a --border --chars=" .-+=o8#"\
+ $INVERT \
+ --width=74 "$tmp.jpg" | less
+ else
+ echo "required program not found to view images: convert" \
+ | less
+ fi
+ else
+ echo "required program not found to view images:" \
+ jp2a or img2aa | less
+ fi
+;;
*)
echo "unknwon selector mode: <$MODE>" | less
exit 3
;;
esac
+
git://git.nikiroo.be / gofetch.git / blobdiff