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Copyright (c) 2010 Benjamin Thomas, Robert Kieffer
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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# mime
Comprehensive MIME type mapping API. Includes all 600+ types and 800+ extensions defined by the Apache project, plus additional types submitted by the node.js community.
## Install
Install with [npm](http://github.com/isaacs/npm):
npm install mime
## API - Queries
### mime.lookup(path)
Get the mime type associated with a file. Performs a case-insensitive lookup using the extension in `path` (the substring after the last '/' or '.'). E.g.
var mime = require('mime');
mime.lookup('/path/to/file.txt'); // => 'text/plain'
mime.lookup('file.txt'); // => 'text/plain'
mime.lookup('.TXT'); // => 'text/plain'
mime.lookup('htm'); // => 'text/html'
### mime.extension(type)
Get the default extension for `type`
mime.extension('text/html'); // => 'html'
mime.extension('application/octet-stream'); // => 'bin'
### mime.charsets.lookup()
Map mime-type to charset
mime.charsets.lookup('text/plain'); // => 'UTF-8'
(The logic for charset lookups is pretty rudimentary. Feel free to suggest improvements.)
## API - Defining Custom Types
The following APIs allow you to add your own type mappings within your project. If you feel a type should be included as part of node-mime, see [requesting new types](https://github.com/bentomas/node-mime/wiki/Requesting-New-Types).
### mime.define()
Add custom mime/extension mappings
mime.define({
'text/x-some-format': ['x-sf', 'x-sft', 'x-sfml'],
'application/x-my-type': ['x-mt', 'x-mtt'],
// etc ...
});
mime.lookup('x-sft'); // => 'text/x-some-format'
The first entry in the extensions array is returned by `mime.extension()`. E.g.
mime.extension('text/x-some-format'); // => 'x-sf'
### mime.load(filepath)
Load mappings from an Apache ".types" format file
mime.load('./my_project.types');
The .types file format is simple - See the `types` dir for examples.

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

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{
"author": {
"name": "Robert Kieffer",
"email": "robert@broofa.com",
"url": "http://github.com/broofa"
},
"contributors": [
{
"name": "Benjamin Thomas",
"email": "benjamin@benjaminthomas.org",
"url": "http://github.com/bentomas"
}
],
"dependencies": {},
"description": "A comprehensive library for mime-type mapping",
"devDependencies": {},
"keywords": [
"util",
"mime"
],
"main": "mime.js",
"name": "mime",
"repository": {
"url": "git://github.com/bentomas/node-mime.git",
"type": "git"
},
"version": "1.2.5",
"_id": "mime@1.2.5",
"optionalDependencies": {},
"engines": {
"node": "*"
},
"_engineSupported": true,
"_npmVersion": "1.1.21",
"_nodeVersion": "v0.6.18",
"_defaultsLoaded": true,
"_from": "mime@>= 1.2"
}

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/**
* Usage: node test.js
*/
var mime = require('./mime');
var assert = require('assert');
function eq(a, b) {
console.log('Test: ' + a + ' === ' + b);
assert.strictEqual.apply(null, arguments);
}
console.log(Object.keys(mime.extensions).length + ' types');
console.log(Object.keys(mime.types).length + ' extensions\n');
//
// Test mime lookups
//
eq('text/plain', mime.lookup('text.txt'));
eq('text/plain', mime.lookup('.text.txt'));
eq('text/plain', mime.lookup('.txt'));
eq('text/plain', mime.lookup('txt'));
eq('application/octet-stream', mime.lookup('text.nope'));
eq('fallback', mime.lookup('text.fallback', 'fallback'));
eq('application/octet-stream', mime.lookup('constructor'));
eq('text/plain', mime.lookup('TEXT.TXT'));
//
// Test extensions
//
eq('txt', mime.extension(mime.types.text));
eq('html', mime.extension(mime.types.htm));
eq('bin', mime.extension('application/octet-stream'));
eq(undefined, mime.extension('constructor'));
//
// Test node types
//
eq('application/octet-stream', mime.lookup('file.buffer'));
eq('audio/mp4', mime.lookup('file.m4a'));
//
// Test charsets
//
eq('UTF-8', mime.charsets.lookup('text/plain'));
eq(undefined, mime.charsets.lookup(mime.types.js));
eq('fallback', mime.charsets.lookup('application/octet-stream', 'fallback'));
console.log('\nOK');

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# What: Google Chrome Extension
# Why: To allow apps to (work) be served with the right content type header.
# http://codereview.chromium.org/2830017
# Added by: niftylettuce
application/x-chrome-extension crx
# What: OTF Message Silencer
# Why: To silence the "Resource interpreted as font but transferred with MIME
# type font/otf" message that occurs in Google Chrome
# Added by: niftylettuce
font/opentype otf
# What: HTC support
# Why: To properly render .htc files such as CSS3PIE
# Added by: niftylettuce
text/x-component htc
# What: HTML5 application cache manifest
# Why: De-facto standard. Required by Mozilla browser when serving HTML5 apps
# per https://developer.mozilla.org/en/offline_resources_in_firefox
# Added by: louisremi
text/cache-manifest appcache manifest
# What: node binary buffer format
# Why: semi-standard extension w/in the node community
# Added by: tootallnate
application/octet-stream buffer
# What: The "protected" MP-4 formats used by iTunes.
# Why: Required for streaming music to browsers (?)
# Added by: broofa
application/mp4 m4p
audio/mp4 m4a
# What: Music playlist format (http://en.wikipedia.org/wiki/M3U)
# Why: See https://github.com/bentomas/node-mime/pull/6
# Added by: mjrusso
application/x-mpegURL m3u8
# What: Video format, Part of RFC1890
# Why: See https://github.com/bentomas/node-mime/pull/6
# Added by: mjrusso
video/MP2T ts
# What: The FLAC lossless codec format
# Why: Streaming and serving FLAC audio
# Added by: jacobrask
audio/flac flac