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| # mime-db | |
| [![NPM Version][npm-version-image]][npm-url] | |
| [![NPM Downloads][npm-downloads-image]][npm-url] | |
| [![Node.js Version][node-image]][node-url] | |
| [![Build Status][ci-image]][ci-url] | |
| [![Coverage Status][coveralls-image]][coveralls-url] | |
| This is a large database of mime types and information about them. | |
| It consists of a single, public JSON file and does not include any logic, | |
| allowing it to remain as un-opinionated as possible with an API. | |
| It aggregates data from the following sources: | |
| - http://www.iana.org/assignments/media-types/media-types.xhtml | |
| - http://svn.apache.org/repos/asf/httpd/httpd/trunk/docs/conf/mime.types | |
| - http://hg.nginx.org/nginx/raw-file/default/conf/mime.types | |
| ## Installation | |
| ```bash | |
| npm install mime-db | |
| ``` | |
| ### Database Download | |
| If you're crazy enough to use this in the browser, you can just grab the | |
| JSON file using [jsDelivr](https://www.jsdelivr.com/). It is recommended to | |
| replace `master` with [a release tag](https://github.com/jshttp/mime-db/tags) | |
| as the JSON format may change in the future. | |
| ``` | |
| https://cdn.jsdelivr.net/gh/jshttp/mime-db@master/db.json | |
| ``` | |
| ## Usage | |
| ```js | |
| var db = require('mime-db') | |
| // grab data on .js files | |
| var data = db['application/javascript'] | |
| ``` | |
| ## Data Structure | |
| The JSON file is a map lookup for lowercased mime types. | |
| Each mime type has the following properties: | |
| - `.source` - where the mime type is defined. | |
| If not set, it's probably a custom media type. | |
| - `apache` - [Apache common media types](http://svn.apache.org/repos/asf/httpd/httpd/trunk/docs/conf/mime.types) | |
| - `iana` - [IANA-defined media types](http://www.iana.org/assignments/media-types/media-types.xhtml) | |
| - `nginx` - [nginx media types](http://hg.nginx.org/nginx/raw-file/default/conf/mime.types) | |
| - `.extensions[]` - known extensions associated with this mime type. | |
| - `.compressible` - whether a file of this type can be gzipped. | |
| - `.charset` - the default charset associated with this type, if any. | |
| If unknown, every property could be `undefined`. | |
| ## Contributing | |
| To edit the database, only make PRs against `src/custom-types.json` or | |
| `src/custom-suffix.json`. | |
| The `src/custom-types.json` file is a JSON object with the MIME type as the | |
| keys and the values being an object with the following keys: | |
| - `compressible` - leave out if you don't know, otherwise `true`/`false` to | |
| indicate whether the data represented by the type is typically compressible. | |
| - `extensions` - include an array of file extensions that are associated with | |
| the type. | |
| - `notes` - human-readable notes about the type, typically what the type is. | |
| - `sources` - include an array of URLs of where the MIME type and the associated | |
| extensions are sourced from. This needs to be a [primary source](https://en.wikipedia.org/wiki/Primary_source); | |
| links to type aggregating sites and Wikipedia are _not acceptable_. | |
| To update the build, run `npm run build`. | |
| ### Adding Custom Media Types | |
| The best way to get new media types included in this library is to register | |
| them with the IANA. The community registration procedure is outlined in | |
| [RFC 6838 section 5](http://tools.ietf.org/html/rfc6838#section-5). Types | |
| registered with the IANA are automatically pulled into this library. | |
| If that is not possible / feasible, they can be added directly here as a | |
| "custom" type. To do this, it is required to have a primary source that | |
| definitively lists the media type. If an extension is going to be listed as | |
| associateed with this media type, the source must definitively link the | |
| media type and extension as well. | |
| [ci-image]: https://badgen.net/github/checks/jshttp/mime-db/master?label=ci | |
| [ci-url]: https://github.com/jshttp/mime-db/actions?query=workflow%3Aci | |
| [coveralls-image]: https://badgen.net/coveralls/c/github/jshttp/mime-db/master | |
| [coveralls-url]: https://coveralls.io/r/jshttp/mime-db?branch=master | |
| [node-image]: https://badgen.net/npm/node/mime-db | |
| [node-url]: https://nodejs.org/en/download | |
| [npm-downloads-image]: https://badgen.net/npm/dm/mime-db | |
| [npm-url]: https://npmjs.org/package/mime-db | |
| [npm-version-image]: https://badgen.net/npm/v/mime-db | |