mirror of
https://github.com/1disk/edp445.git
synced 2024-08-14 22:47:02 +00:00
189 lines
3.6 KiB
JavaScript
189 lines
3.6 KiB
JavaScript
|
/*!
|
||
|
* mime-types
|
||
|
* Copyright(c) 2014 Jonathan Ong
|
||
|
* Copyright(c) 2015 Douglas Christopher Wilson
|
||
|
* MIT Licensed
|
||
|
*/
|
||
|
|
||
|
'use strict'
|
||
|
|
||
|
/**
|
||
|
* Module dependencies.
|
||
|
* @private
|
||
|
*/
|
||
|
|
||
|
var db = require('mime-db')
|
||
|
var extname = require('path').extname
|
||
|
|
||
|
/**
|
||
|
* Module variables.
|
||
|
* @private
|
||
|
*/
|
||
|
|
||
|
var EXTRACT_TYPE_REGEXP = /^\s*([^;\s]*)(?:;|\s|$)/
|
||
|
var TEXT_TYPE_REGEXP = /^text\//i
|
||
|
|
||
|
/**
|
||
|
* Module exports.
|
||
|
* @public
|
||
|
*/
|
||
|
|
||
|
exports.charset = charset
|
||
|
exports.charsets = { lookup: charset }
|
||
|
exports.contentType = contentType
|
||
|
exports.extension = extension
|
||
|
exports.extensions = Object.create(null)
|
||
|
exports.lookup = lookup
|
||
|
exports.types = Object.create(null)
|
||
|
|
||
|
// Populate the extensions/types maps
|
||
|
populateMaps(exports.extensions, exports.types)
|
||
|
|
||
|
/**
|
||
|
* Get the default charset for a MIME type.
|
||
|
*
|
||
|
* @param {string} type
|
||
|
* @return {boolean|string}
|
||
|
*/
|
||
|
|
||
|
function charset (type) {
|
||
|
if (!type || typeof type !== 'string') {
|
||
|
return false
|
||
|
}
|
||
|
|
||
|
// TODO: use media-typer
|
||
|
var match = EXTRACT_TYPE_REGEXP.exec(type)
|
||
|
var mime = match && db[match[1].toLowerCase()]
|
||
|
|
||
|
if (mime && mime.charset) {
|
||
|
return mime.charset
|
||
|
}
|
||
|
|
||
|
// default text/* to utf-8
|
||
|
if (match && TEXT_TYPE_REGEXP.test(match[1])) {
|
||
|
return 'UTF-8'
|
||
|
}
|
||
|
|
||
|
return false
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Create a full Content-Type header given a MIME type or extension.
|
||
|
*
|
||
|
* @param {string} str
|
||
|
* @return {boolean|string}
|
||
|
*/
|
||
|
|
||
|
function contentType (str) {
|
||
|
// TODO: should this even be in this module?
|
||
|
if (!str || typeof str !== 'string') {
|
||
|
return false
|
||
|
}
|
||
|
|
||
|
var mime = str.indexOf('/') === -1
|
||
|
? exports.lookup(str)
|
||
|
: str
|
||
|
|
||
|
if (!mime) {
|
||
|
return false
|
||
|
}
|
||
|
|
||
|
// TODO: use content-type or other module
|
||
|
if (mime.indexOf('charset') === -1) {
|
||
|
var charset = exports.charset(mime)
|
||
|
if (charset) mime += '; charset=' + charset.toLowerCase()
|
||
|
}
|
||
|
|
||
|
return mime
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Get the default extension for a MIME type.
|
||
|
*
|
||
|
* @param {string} type
|
||
|
* @return {boolean|string}
|
||
|
*/
|
||
|
|
||
|
function extension (type) {
|
||
|
if (!type || typeof type !== 'string') {
|
||
|
return false
|
||
|
}
|
||
|
|
||
|
// TODO: use media-typer
|
||
|
var match = EXTRACT_TYPE_REGEXP.exec(type)
|
||
|
|
||
|
// get extensions
|
||
|
var exts = match && exports.extensions[match[1].toLowerCase()]
|
||
|
|
||
|
if (!exts || !exts.length) {
|
||
|
return false
|
||
|
}
|
||
|
|
||
|
return exts[0]
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Lookup the MIME type for a file path/extension.
|
||
|
*
|
||
|
* @param {string} path
|
||
|
* @return {boolean|string}
|
||
|
*/
|
||
|
|
||
|
function lookup (path) {
|
||
|
if (!path || typeof path !== 'string') {
|
||
|
return false
|
||
|
}
|
||
|
|
||
|
// get the extension ("ext" or ".ext" or full path)
|
||
|
var extension = extname('x.' + path)
|
||
|
.toLowerCase()
|
||
|
.substr(1)
|
||
|
|
||
|
if (!extension) {
|
||
|
return false
|
||
|
}
|
||
|
|
||
|
return exports.types[extension] || false
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Populate the extensions and types maps.
|
||
|
* @private
|
||
|
*/
|
||
|
|
||
|
function populateMaps (extensions, types) {
|
||
|
// source preference (least -> most)
|
||
|
var preference = ['nginx', 'apache', undefined, 'iana']
|
||
|
|
||
|
Object.keys(db).forEach(function forEachMimeType (type) {
|
||
|
var mime = db[type]
|
||
|
var exts = mime.extensions
|
||
|
|
||
|
if (!exts || !exts.length) {
|
||
|
return
|
||
|
}
|
||
|
|
||
|
// mime -> extensions
|
||
|
extensions[type] = exts
|
||
|
|
||
|
// extension -> mime
|
||
|
for (var i = 0; i < exts.length; i++) {
|
||
|
var extension = exts[i]
|
||
|
|
||
|
if (types[extension]) {
|
||
|
var from = preference.indexOf(db[types[extension]].source)
|
||
|
var to = preference.indexOf(mime.source)
|
||
|
|
||
|
if (types[extension] !== 'application/octet-stream' &&
|
||
|
(from > to || (from === to && types[extension].substr(0, 12) === 'application/'))) {
|
||
|
// skip the remapping
|
||
|
continue
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// set the extension -> mime
|
||
|
types[extension] = type
|
||
|
}
|
||
|
})
|
||
|
}
|