Normalize paths for Windows (forward slashes) (#1535)

* Update resource-mapper.js

* Create node.js.yml

* Delete node.js.yml

* Update resource-mapper.js

Author: highlevellogic

lib/resource-mapper.js

@@ -6,7 +6,6 @@ const { promisify } = require('util')
 const { types, extensions } = require('mime-types')
 const readdir = promisify(fs.readdir)
 const HTTPError = require('./http-error')
-const pathUtil = require('path')
 
 /*
  * A ResourceMapper maintains the mapping between HTTP URLs and server filenames,
@@ -30,7 +29,7 @@ class ResourceMapper {
     overrideTypes = { acl: 'text/turtle', meta: 'text/turtle' }
   }) {
     this._rootUrl = this._removeTrailingSlash(rootUrl)
-    this._rootPath = this._removeTrailingSlash(rootPath)
+    this._rootPath = this._removeTrailingSlash(rootPath).replace(/\\/g, '/')
     this._includeHost = includeHost
     this._readdir = readdir
     this._defaultContentType = defaultContentType
@@ -84,7 +83,7 @@ class ResourceMapper {
     // Determine the URL by chopping off everything after the dollar sign
     const pathname = this._removeDollarExtension(path)
     const url = `${this.resolveUrl(hostname)}${
-      pathname.split(pathUtil.sep).map((component) => encodeURIComponent(component)).join('/')
+      pathname.split('/').map((component) => encodeURIComponent(component)).join('/')
     }`
     return { url, contentType: this._getContentTypeFromExtension(path) }
   }