-#!/bin/bash
-
-# Note: bash is required, sh will fail to output anything to the client
-# Probably related to interactions beteween & and output redirections
-#
-# It seems the timeout on netcat does not work when listening...
-# So you will have to either kill the process or make a last connection
-# (which will not be processed)
-
-# $0 [prog] ([port])
-# You can use the evironment variable $QUERY_STRING for the query
-
-[ "$ADDR" = "" ] && ADDR=127.0.0.1
-[ "$LOG" = "" ] && LOG=/tmp/gopher.service.err
-[ "$PIDF" = "" ] && PIDF="`mktemp`"
-[ "$TIMEOUT" = "" ] && TIMEOUT=10
-[ "$MAXCON" = "" ] && MAXCON=1024
-
-prog="$1"
-port="$2"
-defn="$3"
-[ "$port" = "" ] && port=70
-
-if [ "$prog" = "" ]; then
- rm "$PIDF"
- echo "Syntax: $0 [prog] ([port]) (default non-7)" >&2
- echo ' You can use the evironment variable $QUERY_STRING for the query' >&2
- echo ' The default port is 70' >&2
- echo ' A default message for non-service (7) request can be given' >&2
- echo ' A filename will be displayed, you can delete it to stop the service' >&2
- echo ' (you still have to make a last connection on $port)' >&2
+#!/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"
+
+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 "$PORT" | sed 's/^://'`"
+
+# Defaults:
+if [ "$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: $0 [gopher uri]" >&2
exit 1
fi
-tmpd=`mktemp -t -d .gopher-service.XXXXXX`
-if [ ! -d "$tmpd" ]; then
- rm "$PIDF"
- echo "Cannot create temporary directory, aborting..." >&2
+# can be "-" for no escape sequences
+[ "$LINK_COLOR" = "" ] && LINK_COLOR=2
+
+# Start and end link tags
+SL=
+EL=
+if [ "$LINK_COLOR" != "-" ]; then
+ SL="`tput setf $LINK_COLOR``tput setaf $LINK_COLOR`"
+ EL="`tput init`"
+ export LESS="${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 "$1" | grep "^i\|^$PREFIX" | sed 's:\\:\\\\\\\\:g' | while read ln; do
+ if echo "$ln" | grep "^i" >/dev/null 2>&1; then
+ echo "$ln" | sed "s:^.\([^\t]*\).*$: \1:g"
+ elif echo "$ln" | grep "^$PREFIX" >/dev/null 2>&1; then
+ i=`expr $i + 1`
+ [ $i -le 9 ] && i=0$i
+ field="`echo "$ln" | cut -c1`"
+ case "$field" in
+ 0) typ='TXT';;
+ 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 "$ln" | sed "s:^.\\([^\t]*\\).*:$typ $i $SL\\1$EL:g"
+ fi
+ done
+}
+
+# $0 [FILE] [INDEX] [FIELD]
+# Get a field from the given-by-index link in FILE
+#
+# Fields:
+# 1 = type/name
+# 2 = selector
+# 3 = server
+# 4 = port
+getsel() {
+ 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" "$tmp.jpg" "$tmp.menu" "$tmp.choice"
+}
+trap finish EXIT
+
+ok=true
+if [ "$PROTOCOL" = gopher:// -o "$PROTOCOL" = "" ]; then
+ echo "$SELECTOR" | nc "$SERVER" "$PORT" > "$tmp" || ok=false
+else
+ if wget -h >/dev/null 2>&1; then
+ wget "${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
-echo "#/bin/sh
-# PID: $$
-# PID File (this file): $PIDF
-# You can stop the service by deleting this file then making a last
-# connection (which will not be processed) to the service:
-rm \"$PIDF\"
-nc -q0 $ADDR $port 2>/dev/null </dev/null
-" > "$PIDF"
-
-chmod u+rx "$PIDF"
-
-echo "$PIDF"
-
-i=0
-while [ -e "$PIDF" ]; do
- i=`expr $i + 1`
- [ $i -gt "$MAXCON" ] && i=1
- fifo="$tmpd/fifo.$i"
- rm -f "$fifo" 2>/dev/null
- mkfifo "$fifo"
- < "$fifo" nc -l -q0 -w"$TIMEOUT" "$ADDR" -p "$port" | (
- if [ -e "$PIDF" ]; then
- read -r query
- selector="`echo "$query" | cut -f1 -d' ' | sed 's:[\r\n]::g'`"
- query="`echo "$query" | cut -f2 -d' ' | sed 's:[\r\n]::g'`"
- if [ "$query" = "" ]; then
- if [ "$defn" = "" ]; then
- echo "7Search $selector $ADDR $port"
- else
- echo "$defn"
- fi
- else
- QUERY_STRING="$query" "$prog" 2>> "$LOG" &
+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 "$tmp" | less
+;;
+1|+)
+ CHOICE=0
+ while [ "$CHOICE" != "" ]; do
+ 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 "^$PREFIX" | wc --lines`
fi
+ elif [ "$NEW_CHOICE" = n ]; then
+ CHOICE=`expr "$CHOICE" + 1 2>/dev/null`
+ else
+ CHOICE="$NEW_CHOICE"
fi
- ) > "$fifo"
-done
-rm -rf "$tmpd" 2>/dev/null
+
+ [ "$CHOICE" = q ] && exit 255 # force-quit
+ index="`expr 1 \* "$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" $index 1 | cut -c1`"
+ echo "Digging to [$goto_server:$goto_port] $index [$goto_sel]..."
+ sh "$0" "$goto_server:$goto_port/$goto_mode/$goto_sel"
+ [ $? = 255 ] && exit 255 # force-quit
+ fi
+ done
+;;
+7)
+ read -p "Query: " SEARCH
+ selQuery="$SELECTOR $SEARCH"
+
+ exec sh "$0" "$SERVER" "$selQuery" "$PORT" 1
+;;
+8)
+ telnet -l "$SELECTOR" "$SERVER" "$PORT"
+ read DUMMY
+;;
+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