Körperbewegung

mods/modlib/web/uri.lua

@@ -0,0 +1,42 @@
+-- URI escaping utilities
+-- See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURI
+
+local uri_unescaped_chars = {}
+for char in ("-_.!~*'()"):gmatch(".") do
+	uri_unescaped_chars[char] = true
+end
+local function add_unescaped_range(from, to)
+	for byte = from:byte(), to:byte() do
+		uri_unescaped_chars[string.char(byte)] = true
+	end
+end
+add_unescaped_range("0", "9")
+add_unescaped_range("a", "z")
+add_unescaped_range("A", "Z")
+
+local uri_allowed_chars = table.copy(uri_unescaped_chars)
+for char in (";,/?:@&=+$#"):gmatch(".") do
+	-- Reserved characters are allowed
+	uri_allowed_chars[char] = true
+end
+
+local function encode(text, allowed_chars)
+	return text:gsub(".", function(char)
+		if allowed_chars[char] then
+			return char
+		end
+		return ("%%%02X"):format(char:byte())
+	end)
+end
+
+local uri = {}
+
+function uri.encode_component(text)
+	return encode(text, uri_unescaped_chars)
+end
+
+function uri.encode(text)
+	return encode(text, uri_allowed_chars)
+end
+
+return uri