64 lines
1.7 KiB
JavaScript
64 lines
1.7 KiB
JavaScript
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var db = require('mime-db')
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// types[extension] = type
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exports.types = Object.create(null)
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// extensions[type] = [extensions]
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exports.extensions = Object.create(null)
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Object.keys(db).forEach(function (name) {
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var mime = db[name]
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var exts = mime.extensions
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if (!exts || !exts.length) return
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exports.extensions[name] = exts
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exts.forEach(function (ext) {
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exports.types[ext] = name
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})
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})
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exports.lookup = function (string) {
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if (!string || typeof string !== "string") return false
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// remove any leading paths, though we should just use path.basename
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string = string.replace(/.*[\.\/\\]/, '').toLowerCase()
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if (!string) return false
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return exports.types[string] || false
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}
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exports.extension = function (type) {
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if (!type || typeof type !== "string") return false
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// to do: use media-typer
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type = type.match(/^\s*([^;\s]*)(?:;|\s|$)/)
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if (!type) return false
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var exts = exports.extensions[type[1].toLowerCase()]
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if (!exts || !exts.length) return false
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return exts[0]
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}
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// type has to be an exact mime type
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exports.charset = function (type) {
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var mime = db[type]
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if (mime && mime.charset) return mime.charset
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// default text/* to utf-8
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if (/^text\//.test(type)) return 'UTF-8'
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return false
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}
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// backwards compatibility
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exports.charsets = {
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lookup: exports.charset
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}
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// to do: maybe use set-type module or something
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exports.contentType = function (type) {
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if (!type || typeof type !== "string") return false
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if (!~type.indexOf('/')) type = exports.lookup(type)
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if (!type) return false
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if (!~type.indexOf('charset')) {
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var charset = exports.charset(type)
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if (charset) type += '; charset=' + charset.toLowerCase()
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}
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return type
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}
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