X-Git-Url: http://git.nikiroo.be/?p=gofetch.git;a=blobdiff_plain;f=gopher.sh;h=5d7439f82955a160c904379315aebfc34884bed1;hp=93715fca3de805898818f472c72df10af51e81a2;hb=HEAD;hpb=050494fa08e2efb5f3b870854490c54e0426de9f

diff --git a/gopher.sh b/gopher.sh
index 93715fc..5d7439f 100755
--- a/gopher.sh
+++ b/gopher.sh
@@ -1,55 +1,120 @@
 #!/bin/sh
 
-SERVER="$1"
-SELECTOR="$2"
-PORT="$3"
-MODE="$4"
+# $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:
-[ "$PORT" = "" ] && PORT=70
+if [ "$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
 
-LINK_COLOR=2 # can be empty for no escape sequences
+# can be "-" for no escape sequences
+[ "$LINK_COLOR" = ""  ] && LINK_COLOR=2
 
 # Start and end link tags
 SL=
 EL=
-if [ "$LINK_COLOR" != "" ]; then
+if [ "$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
 }
@@ -63,37 +128,71 @@ cat_menu() {
 # 	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"
 }
 
-tmp="`mktemp gofetch.current_page.XXXXX`"
+# 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"
+			[ $? = 255 ] && exit 255 # force-quit
 		fi
 	done
 ;;
@@ -110,8 +209,29 @@ case "$MODE" in
 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
+