add mimeLookup and mimemap

Author: jeremydaly

mimemap.js

@@ -0,0 +1,73 @@
+'use strict'
+
+/**
+ * Lightweight web framework for your serverless applications
+ * @author Jeremy Daly <[email protected]>
+ * @license MIT
+ */
+
+// Minimal mime map for common file types
+
+module.exports = {
+  // images
+  gif: 'image/gif',
+  ico: 'image/x-icon',
+  jpg: 'image/jpeg',
+  jpeg: 'image/jpeg',
+  png: 'image/png',
+  svg: 'image/svg+xml',
+  svgz: 'image/svg+xml',
+
+  // text
+  atom: 'application/atom+xml',
+  css: 'text/css',
+  csv: 'text/csv',
+  html: 'text/html',
+  htm: 'text/html',
+  js: 'application/javascript',
+  json: 'application/json',
+  map: 'application/json',
+  rdf: 'application/rdf+xml',
+  rss: 'application/rss+xml',
+  webmanifest: 'application/manifest+json',
+  xml: 'application/xml',
+  xls: 'application/xml',
+
+  // other binary
+  gz: 'application/gzip',
+  pdf: 'application/pdf',
+  zip: 'application/zip',
+
+  // fonts
+  woff: 'application/font-woff',
+
+  // MS file Types
+  doc: 'application/msword',
+  dot: 'application/msword',
+  docx: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
+  dotx: 'application/vnd.openxmlformats-officedocument.wordprocessingml.template',
+  docm: 'application/vnd.ms-word.document.macroEnabled.12',
+  dotm: 'application/vnd.ms-word.template.macroEnabled.12',
+  xls: 'application/vnd.ms-excel',
+  xlt: 'application/vnd.ms-excel',
+  xla: 'application/vnd.ms-excel',
+  xlsx: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+  xltx: 'application/vnd.openxmlformats-officedocument.spreadsheetml.template',
+  xlsm: 'application/vnd.ms-excel.sheet.macroEnabled.12',
+  xltm: 'application/vnd.ms-excel.template.macroEnabled.12',
+  xlam: 'application/vnd.ms-excel.addin.macroEnabled.12',
+  xlsb: 'application/vnd.ms-excel.sheet.binary.macroEnabled.12',
+  ppt: 'application/vnd.ms-powerpoint',
+  pot: 'application/vnd.ms-powerpoint',
+  pps: 'application/vnd.ms-powerpoint',
+  ppa: 'application/vnd.ms-powerpoint',
+  pptx: 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
+  potx: 'application/vnd.openxmlformats-officedocument.presentationml.template',
+  ppsx: 'application/vnd.openxmlformats-officedocument.presentationml.slideshow',
+  ppam: 'application/vnd.ms-powerpoint.addin.macroEnabled.12',
+  pptm: 'application/vnd.ms-powerpoint.presentation.macroEnabled.12',
+  potm: 'application/vnd.ms-powerpoint.template.macroEnabled.12',
+  ppsm: 'application/vnd.ms-powerpoint.slideshow.macroEnabled.12',
+  mdb: 'application/vnd.ms-access'
+
+}

utils.js

@@ -26,13 +26,34 @@ module.exports.encodeUrl = url => String(url)
   .replace(UNMATCHED_SURROGATE_PAIR_REGEXP, UNMATCHED_SURROGATE_PAIR_REPLACE)
   .replace(ENCODE_CHARS_REGEXP, encodeURI)
 
+
+
 module.exports.encodeBody = body =>
   typeof body === 'object' ? JSON.stringify(body) : (body && typeof body !== 'string' ? body.toString() : (body ? body : ''))
 
+
+
 module.exports.parseBody = body => {
   try {
     return JSON.parse(body)
   } catch(e) {
     return body;
   }
 }
+
+
+
+const mimeMap = require('./mimemap.js') // MIME Map
+
+module.exports.mimeLookup = (input,custom={}) => {
+  let type = input.trim().replace(/^\./,'')
+
+  // If it contains a slash, return unmodified
+  if (/.*\/.*/.test(type)) {
+    return input.trim()
+  } else {
+    // Lookup mime type
+    let mime = Object.assign(mimeMap,custom)[type]
+    return mime ? mime : false
+  }
+}