replace location.origin usage with new utils/getLocationOrigin (#1142)

lib/link.js

 import { resolve } from 'url'
 import React, { Component, Children, PropTypes } from 'react'
 import Router from './router'
-import { warn, execOnce } from './utils'
+import { warn, execOnce, getLocationOrigin } from './utils'
 
 export default class Link extends Component {
   constructor (props) {
@@ -84,7 +84,7 @@ export default class Link extends Component {
 }
 
 export function isLocal (href) {
-  const origin = window.location.origin
+  const origin = getLocationOrigin()
   return !/^(https?:)?\/\//.test(href) ||
     origin === href.substr(0, origin.length)
 }

lib/router/router.js

@@ -5,7 +5,7 @@ import evalScript from '../eval-script'
 import shallowEquals from '../shallow-equals'
 import { EventEmitter } from 'events'
 import { reloadIfPrefetched } from '../prefetch'
-import { loadGetInitialProps } from '../utils'
+import { loadGetInitialProps, getLocationOrigin } from '../utils'
 
 export default class Router extends EventEmitter {
   constructor (pathname, query, { Component, ErrorComponent, err } = {}) {
@@ -283,7 +283,8 @@ export default class Router extends EventEmitter {
 }
 
 function getURL () {
-  const { href, origin } = window.location
+  const { href } = window.location
+  const origin = getLocationOrigin()
   return href.substring(origin.length)
 }
 

lib/utils.js

@@ -53,3 +53,8 @@ export async function loadGetInitialProps (Component, ctx) {
   }
   return props
 }
+
+export function getLocationOrigin () {
+  const { protocol, hostname, port } = window.location
+  return `${protocol}//${hostname}${port ? ':' + port : ''}`
+}