Custom URL scheme handler with AppleScript

README.md

1. Create new AppleScript with ScriptEditor.app
2. Copy & Paste open.applescript into the script you create
3. Save the script as an application
4. Open Info.plist which in the application you create (you can find it under Open.app/Contents directory)
5. Add thoes keys to specify the URL scheme

<key>CFBundleIdentifier</key>
<string>me.senta.AppleScript.Open</string>
<key>CFBundleURLTypes</key>
<array>
	<dict>
  	<key>CFBundleURLName</key>
		<string>Open</string>
		<key>CFBundleURLSchemes</key>
		<array>
			<string>open</string>
		</array>
	</dict>
</array>

Info.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>CFBundleAllowMixedLocalizations</key>
	<true/>
	<key>CFBundleDevelopmentRegion</key>
	<string>English</string>
	<key>CFBundleExecutable</key>
	<string>applet</string>
	<key>CFBundleIconFile</key>
	<string>applet</string>
	<key>CFBundleIdentifier</key>
	<string>me.senta.AppleScript.Open</string>
	<key>CFBundleInfoDictionaryVersion</key>
	<string>6.0</string>
	<key>CFBundleName</key>
	<string>Open</string>
	<key>CFBundlePackageType</key>
	<string>APPL</string>
	<key>CFBundleShortVersionString</key>
	<string>1.0</string>
	<key>CFBundleSignature</key>
	<string>aplt</string>
	<key>CFBundleURLTypes</key>
	<array>
		<dict>
			<key>CFBundleURLName</key>
			<string>Open</string>
			<key>CFBundleURLSchemes</key>
			<array>
				<string>open</string>
			</array>
		</dict>
	</array>
	<key>LSMinimumSystemVersionByArchitecture</key>
	<dict>
		<key>x86_64</key>
		<string>10.6</string>
	</dict>
	<key>LSRequiresCarbon</key>
	<true/>
	<key>WindowState</key>
	<dict>
		<key>bundleDividerCollapsed</key>
		<true/>
		<key>bundlePositionOfDivider</key>
		<real>0.0</real>
		<key>dividerCollapsed</key>
		<false/>
		<key>eventLogLevel</key>
		<integer>2</integer>
		<key>name</key>
		<string>ScriptWindowState</string>
		<key>positionOfDivider</key>
		<real>388</real>
		<key>savedFrame</key>
		<string>725 122 700 672 0 0 1920 1058 </string>
		<key>selectedTab</key>
		<string>log</string>
	</dict>
</dict>
</plist>

open.applescript

-- Open application by the `open` command wit `open://` url scheme
-- open:///path/to/file
-- You can give an argument to specify application whch open the file with
-- open:///path/to/file?CotEditor
on open location _url
	set _url to urlDecode(_url)
	set x to the offset of "?" in _url
	if x is 0 then
		set the _path to text 8 thru -1 of _url
		openIn(_path, "")
	else
		set the _path to text 8 thru (x - 1) of _url
		set the _app to text (x + 1) thru (-1) of _url
		openIn(_path, _app)
	end if
end open location

on urlDecode(_url)
	set _script to "php -r 'echo urldecode(" & quote & _url & quote & ");'"
	return (do shell script _script) as string
end urlDecode

on openIn(_path, _app)
	set _script to "open " & quote & _path & quote
	if _app is not "" then
		set _script to _script & " -a " & quote & _app & quote
	end if
	
	try
		do shell script _script
	on error _msg
		display dialog "Error: " & _msg
	end try
end openIn

open location "open:///Users/senta/Desktop/hey.md?CotEdixtor"