implement mime-type overrides.. tests.

lib/local-web-server.js

@@ -1,4 +1,5 @@
 'use strict'
+const path = require('path')
 const Koa = require('koa')
 const serve = require('koa-static')
 const convert = require('koa-convert')
@@ -30,9 +31,19 @@ function getApp (options) {
 
   const app = new Koa()
 
-  // app.use((ctx, next) => {
-  //   return next().then(() => ctx.type = 'text/plain')
-  // })
+  // CORS
+
+  if (options.mime) {
+    app.use((ctx, next) => {
+      return next().then(() => {
+        const reqPathExtension = path.extname(ctx.path).slice(1)
+        Object.keys(options.mime).forEach(mimeType => {
+          const extsToOverride = options.mime[mimeType]
+          if (extsToOverride.indexOf(reqPathExtension) > -1) ctx.type = mimeType
+        })
+      })
+    })
+  }
 
   if (options.compress) {
     app.use(convert(compress()))