A mime type catalog driven by filename extensions.

mimetype-js ===========


I find keep making these file extension lookup tables for mime types. It's about time I put it in a module to save me the trouble.


var mimetype = require('mimetype');
console.log(mimetype.lookup("myfile.txt")); // Should display text/plain
mimetype.set('.exotic', 'x-application/experimental'); // Add/update a mime type in the catalog
console.log(mimetype.lookup("myfile.exotic")); // Should display x-application/experimental
mimetype.del('.exotic'); // Removes the mime type from the catalog
console.log(mimetype.lookup("myfile.exitoc")); // Should display false
mimetype.forEach(function (ext, mime_type_string) {
console.log(ext, mime_type_string); // Display the extension and matching mimetype in catalog

Sometimes detecting by filename extensions isn't work and you want to default to a general purposes mime-type (e.g. text/plain, application/octet-stream).

var mimetype = require('mimetype');
// This should display 0 (false)
// This should display the string text/plain
console.log(mimetype.lookup("filename.unknownMimeType", false, "text/plain");
// This should display the string text/plain; charset=UTF-8
console.log(mimetype.lookup("filename.unknownMimeType", "UTF-8", "text/plain");

While this was implemented as a NodeJS module it also works under MongoDB's shell. Instead of including with a "require" you would load the JavaScript file load-mimetype.js.

print("Check the mime type of test.txt:" + MimeType.lookup("test.txt"));

This would display something like-

MongoDB shell version: 2.2.0
connecting to: test
> load("./extras/load-mimetype.js");
> print("Check the mime type of test.txt: " + MimeType.lookup("test.txt"));
Check the mime type of test.txt: text/plain