Javascript 获取 api : 无法检索某些响应 header

Javascript fetch api : Can't retrieve some response header

我正在使用 javascript fetch API 查询 cross-domain api 使用此代码:

fetch('https://api.com/search?query="2016"').then(function (response) {

  console.log(response.headers.get('Access-Control-Allow-Headers'))

  console.log(response.headers.get('Content-Range'))
  console.log(response.headers.get('Accept-Range'))

  console.log(response.headers.get('Date'))
  console.log(response.headers.get('Content-Type'))
})

回复headers如下:

Accept-Range:cars 300
Access-Control-Allow-Credentials:true
Access-Control-Allow-Headers:Origin, X-Requested-With, Content-Type, Accept, Content-Range, Accept-Range
Access-Control-Allow-Methods:PUT, POST, OPTIONS, GET
Access-Control-Allow-Origin:*
Cache-Control:no-cache
Connection:keep-alive
Content-Range:0-99/1941
Content-Type:application/json
Date:Tue, 12 Jan 2016 12:17:55 GMT
Transfer-Encoding:chunked

非常奇怪的是,只有 "Content-Type" 为其他人工作,我得到 null :

null
null
null
null
application/json

我需要做什么才能检索那些 null headers?

该死的,我用的是 'Access-Control-Allow-Headers' 而不是 'Access-Control-Expose-Headers'

现在有效

使用 CORS 包。并输入此参数:

cors({credentials: true, origin: true, exposedHeaders: '*'})

喜欢这里写的: