42 lines
1003 B
Lua
42 lines
1003 B
Lua
-- URI escaping utilities
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-- See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURI
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local uri_unescaped_chars = {}
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for char in ("-_.!~*'()"):gmatch(".") do
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uri_unescaped_chars[char] = true
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end
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local function add_unescaped_range(from, to)
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for byte = from:byte(), to:byte() do
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uri_unescaped_chars[string.char(byte)] = true
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end
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end
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add_unescaped_range("0", "9")
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add_unescaped_range("a", "z")
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add_unescaped_range("A", "Z")
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local uri_allowed_chars = table.copy(uri_unescaped_chars)
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for char in (";,/?:@&=+$#"):gmatch(".") do
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-- Reserved characters are allowed
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uri_allowed_chars[char] = true
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end
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local function encode(text, allowed_chars)
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return text:gsub(".", function(char)
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if allowed_chars[char] then
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return char
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end
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return ("%%%02X"):format(char:byte())
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end)
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end
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local uri = {}
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function uri.encode_component(text)
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return encode(text, uri_unescaped_chars)
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end
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function uri.encode(text)
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return encode(text, uri_allowed_chars)
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end
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return uri |