remove mime types

lib/response.js

@@ -19,7 +19,6 @@ var encodeUrl = require('encodeurl');
 var escapeHtml = require('escape-html');
 var http = require('http');
 var onFinished = require('on-finished');
-var mime = require('mime-types')
 var path = require('path');
 var pathIsAbsolute = require('path').isAbsolute;
 var statuses = require('statuses')
@@ -495,11 +494,9 @@ res.download = function download (path, filename, options, callback) {
 
 res.contentType =
 res.type = function contentType(type) {
-  var ct = type.indexOf('/') === -1
-    ? (mime.contentType(type) || 'application/octet-stream')
-    : type;
+  if(!type) type = "application/octet-stream"
 
-  return this.set('Content-Type', ct);
+  return this.set('Content-Type', type);
 };
 
 /**
@@ -666,7 +663,10 @@ res.header = function header(field, val) {
       if (Array.isArray(value)) {
         throw new TypeError('Content-Type cannot be set to an Array');
       }
-      value = mime.contentType(value)
+
+      if ((value.startsWith('text/') || value === 'application/javascript' || value === 'application/json') && !charsetRegExp.test(value)) {
+        value += '; charset=utf-8';
+      }
     }
 
     this.setHeader(field, value);

lib/utils.js

@@ -15,7 +15,6 @@
 var Buffer = require('safe-buffer').Buffer
 var contentType = require('content-type');
 var etag = require('etag');
-var mime = require('mime-types')
 var proxyaddr = require('proxy-addr');
 var qs = require('qs');
 var querystring = require('querystring');

package.json

@@ -44,7 +44,6 @@
     "http-errors": "2.0.0",
     "merge-descriptors": "1.0.3",
     "methods": "~1.1.2",
-    "mime-types": "^3.0.0",
     "on-finished": "2.4.1",
     "once": "1.4.0",
     "parseurl": "~1.3.3",