hapi.js Cors飞行前不返回Access-Control-Allow-Origin头 [英] hapi.js Cors Pre-flight not returning Access-Control-Allow-Origin header

问题描述

我有一个ajax文件上传使用（Dropzone js）。它将文件发送到我的hapi服务器。我意识到浏览器发送了一个PREFLIGHT OPTIONS方法。但我的hapi服务器似乎没有发送正确的响应头，所以我得到错误铬。
这里是我在chrome上的错误

I have an ajax file upload using (Dropzone js). which sends a file to my hapi server. I realised the browser sends a PREFLIGHT OPTIONS METHOD. but my hapi server seems not to send the right response headers so i am getting errors on chrome. here is the error i get on chrome

XMLHttpRequest cannot load http://localhost:3000/uploadbookimg. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:4200' is therefore not allowed access.

这是hapi js路由处理程序

this is the hapi js route handler

server.route({
        path: '/uploadbookimg',
        method: 'POST',
        config: {
            cors : true,
            payload: {
                output: 'stream',
                parse: true,
                allow: 'multipart/form-data'
            },
        handler: require('./books/webbookimgupload'),
        }
    });

在我的理解中，hapi js应该发送来自预战斗（OPTIONS）请求的所有cors标题。
不明白为什么不是

In my understanding hapi js should send all cors headers from the Pre-fight (OPTIONS) request. Cant understand why its is not

Chrome的网络请求/响应

Network request /response from chrome

**General**
Request Method:OPTIONS
Status Code:200 OK
Remote Address:127.0.0.1:3000

**Response Headers**
view parsed
HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
cache-control: no-cache
vary: accept-encoding
Date: Wed, 27 Apr 2016 07:25:33 GMT
Connection: keep-alive
Transfer-Encoding: chunked

**Request Headers**
view parsed
OPTIONS /uploadbookimg HTTP/1.1
Host: localhost:3000
Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache
Access-Control-Request-Method: POST
Origin: http://localhost:4200
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.87 Safari/537.36
Access-Control-Request-Headers: accept, cache-control, content-type
Accept: */*
Referer: http://localhost:4200/books/upload
Accept-Encoding: gzip, deflate, sdch
Accept-Language: en-US,en;q=0.8

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推荐答案

hapi cors：true 是一个通配符规则，除少数情况外，包括 hapi的默认值以外有其他请求标头时白名单：

The hapi cors: true is a wildcard rule that allows CORS requests from all domains except for a few cases including when there are additional request headers outside of hapi's default whitelist:

[accept，authorization，content-type，if-none-match origin]

查看<$

See the cors option section in the API docs under route options:

<$ p>

headers - a strings array of allowed headers ('Access-Control-Allow-Headers'). Defaults to ['Accept', 'Authorization', 'Content-Type', 'If-None-Match'].

additionalHeaders - 附加标题到标题的字符串数组。

additionalHeaders - a strings array of additional headers to headers. Use this to keep the default headers in place.

您的问题是Dropzone发送几个头文件和文件上传在此列表中：

Your problem is that Dropzone sends a couple of headers along with the file upload that aren't in this list:

• x-requested- with

• x-requested-with (not in your headers above but was sent for me)
• cache-control

您有两个选项可以让工作正常，您需要在服务器或客户端上更改某些内容：

You have two options to get things working, you need to change something on either the server or the client:

server.route({
    config: {
        cors: {
            origin: ['*'],
            additionalHeaders: ['cache-control', 'x-requested-with']
        }
    },
    method: 'POST',
    path: '/upload',
    handler: function (request, reply) {

        ...
    }
});

选项2 - 指示dropzone不发送这些额外的标题

通过其配置无法实现，但有一个待审批的公关来允许它： https://github.com/ enyo / dropzone / pull / 685

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