xdg-sanity.sh

@@ -1,66 +1,85 @@
 #!/bin/sh
+set -e
 
-INPUT=$(echo $1)
-echo "Loading configuration..."
-CONFIG=$(cat /etc/xdg-sanity/xdg-sanity.conf)
-BROWSER=$(echo $CONFIG | sed -ne 's/^browser *= *//p')
+argv0="$0"
 
-if [ "$BROWSER" = "" ]
-then
-echo "Please place the path to your default browser's executable in /etc/xdg-sanity/xdg-sanity.conf"
-exit
-else
-echo "Found default browser $BROWSER"
+# cats out the configuration or {'\n', EOF} if it can't be found
+stream_config(){
+	for file in \
+			"$HOME"/.config/xdg-sanity.conf \
+			"$HOME"/.xdg-sanity.conf \
+			/etc/xdg-sanity/xdg-sanity.conf \
+			/dev/null
+	do
+		cat "$file" 2>/dev/null \
+			&& break \
+			|| true
+	done
+}
+
+# check if usage is valid
+if ! test -n "$1"; then
+	printf "Usage: %s [resource...]\n" "$argv0" 1>&2
+	exit 64 # sysexits(3) EX_USAGE
 fi
 
-echo "Loading extensions..."
-for EXT in /etc/xdg-sanity/extensions/*.sh
-do
-
-if [ "$EXT" = "/etc/xdg-sanity/extensions/*.sh" ]
-then
-echo "No extensions to load"
-else
-
-for EXT in /etc/xdg-sanity/extensions/*.sh
-do
-TYPE=$(cat $EXT | sed -ne 's/^# EXT-TYPE=//p' | tr -d '\n')
-echo "Found $TYPE extension $EXT"
-
-if [ "$TYPE" = "replace" ]
-then
-echo "Modifying $INPUT..."
-INPUT=$($EXT "$INPUT")
-echo "Got $INPUT"
-
-else
-if [ "$TYPE" = "mime" ]
-then
-echo "Modifying MIME type..."
-MIME=$($EXT "$INPUT")
-echo "Got $MIME"
-
-fi
+# check if we have curl(1)
+if ! command -v curl >/dev/null 2>&1; then
+	printf "%s: Missing dependency: curl(1)\n" "$argv0" 1>&2
+	exit 71 # sysexits(3) EX_OSERR
 fi
 
-done
+# check if we have handlr(1), but we might not need it
+if ! command -v handlr >/dev/null 2>&1; then
+	alias handlr=false
 fi
 
+test -n "$BROWSER" || BROWSER="$(stream_config | sed -ne 's/^browser *= *//p')"
+
+# check if we have a $BROWSER
+if ! test -n "$BROWSER"; then
+	printf "\
+%s: \$BROWSER not filled.
+	Please place the path to your default browser's executable in
+	/etc/xdg-sanity/xdg-sanity.conf
+" "$argv0" 1>&2
+	exit 71 # sysexits(3) EX_OSERR
+fi
+
+while test -n "$1"; do
+	argv1="$1"
+
+	# use curl(1) to write out the request header's content_type,
+	# strip everything after the first semicolon,
+	# chop off any weird whitespace remnants
+	MIME="$(curl -Ls -o /dev/null -w '%{content_type}' $1 | sed 's/\;.*//' | xargs echo)"
+
+	# RESPONSE_CODE=$(curl -fLIs "$INPUT" | sed -ne 's/ [[:space:]]*$//p' | sed -ne 's|^HTTP/.\+ ||p')
+
+	for extension in /etc/xdg-sanity/extensions/*.sh; do
+		! [ "$extension" = "/etc/xdg-sanity/extensions/*.sh" ] || break
+		# switch(extension_type)
+		case "$(sed -ne 's/^# EXT-TYPE=//p' <"$extension" | xargs echo)" in
+		replace)
+			argv1="$("$extension" "$argv1")"
+			;;
+		mime)
+			argv1="$("$extension" "$argv1")"
+			;;
+		esac
+	done
+
+	# these commands may fail; this is intentional
+	if [ "$MIME" = "text/html" ]; then
+		"$BROWSER" "$argv1"
+	elif ! handlr launch "$MIME" -- "$argv1"; then
+		printf "%s: %s: handlr(1) failed: " "$argv0" "$argv1" 1>&2
+		[ "$(command -v handlr)" = "false" ] \
+			&& printf "'handlr' program not found\n" 1>&2 \
+			|| printf "non-zero exit status\n" 1>&2
+	fi
+
+	shift
 done
 
-if [ "$MIME" = "" ] || [ "$MIME" = "$1" ] || [ "$MIME" = "$INPUT" ]
-then
-echo "Determining MIME type of $INPUT:"
-# Determines HTTP code, might use for something else?
-# CODE=$(curl -fLIs "$INPUT" | sed -ne 's/ [[:space:]]*$//p' | sed -ne 's|^HTTP/.\+ ||p')
-MIME=$(curl -fLIs "$INPUT" | sed -ne 's/^[cC]ontent-[tT]ype: //p' | sed -e 's/;.\+//p' | tail -n1 | tr -d '\r')
-echo $MIME
-fi
-
-if [ "$MIME" = "text/html" ]
-then
-$BROWSER $INPUT
-
-else
-handlr launch "$MIME" -- "$INPUT"
-fi
+exit 0