93 lines
2.4 KiB
JavaScript
93 lines
2.4 KiB
JavaScript
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var path = require('path'),
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fs = require('fs');
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var mime = module.exports = {
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/** Map of extension to mime type */
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types: {},
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/** Map of mime type to extension */
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extensions :{},
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/**
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* Define mimetype -> extension mappings. Each key is a mime-type that maps
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* to an array of extensions associated with the type. The first extension is
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* used as the default extension for the type.
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*
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* e.g. mime.define({'audio/ogg', ['oga', 'ogg', 'spx']});
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*
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* @param map (Object) type definitions
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*/
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define: function(map) {
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for (var type in map) {
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var exts = map[type];
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for (var i = 0; i < exts.length; i++) {
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mime.types[exts[i]] = type;
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}
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// Default extension is the first one we encounter
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if (!mime.extensions[type]) {
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mime.extensions[type] = exts[0];
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}
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}
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},
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/**
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* Load an Apache2-style ".types" file
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*
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* This may be called multiple times (it's expected). Where files declare
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* overlapping types/extensions, the last file wins.
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*
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* @param file (String) path of file to load.
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*/
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load: function(file) {
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// Read file and split into lines
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var map = {},
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content = fs.readFileSync(file, 'ascii'),
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lines = content.split(/[\r\n]+/);
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lines.forEach(function(line, lineno) {
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// Clean up whitespace/comments, and split into fields
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var fields = line.replace(/\s*#.*|^\s*|\s*$/g, '').split(/\s+/);
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map[fields.shift()] = fields;
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});
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mime.define(map);
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},
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/**
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* Lookup a mime type based on extension
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*/
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lookup: function(path, fallback) {
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var ext = path.replace(/.*[\.\/]/, '').toLowerCase();
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return mime.types[ext] || fallback || mime.default_type;
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},
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/**
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* Return file extension associated with a mime type
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*/
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extension: function(mimeType) {
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return mime.extensions[mimeType];
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},
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/**
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* Lookup a charset based on mime type.
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*/
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charsets: {
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lookup: function (mimeType, fallback) {
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// Assume text types are utf8. Modify mime logic as needed.
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return (/^text\//).test(mimeType) ? 'UTF-8' : fallback;
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}
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}
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};
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// Load our local copy of
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// http://svn.apache.org/repos/asf/httpd/httpd/trunk/docs/conf/mime.types
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mime.load(path.join(__dirname, 'types/mime.types'));
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// Overlay enhancements submitted by the node.js community
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mime.load(path.join(__dirname, 'types/node.types'));
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// Set the default type
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mime.default_type = mime.types.bin;
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