Google Cloud Storage 签名 URL 的预检未返回 CORS 响应标头

Question

我正在尝试将签名的可恢复上传执行到 GCS。我们的前端在初始请求上遇到了 CORS 限制： Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

响应头不显示 CORS 头：

alt-svc: quic=":443"; ma=2592000; v="44,43,39,35" cache-control: private, max-age=0 content-length: 0 content-type: text/html; charset=UTF-8 date: Tue, 13 Nov 2018 20:28:32 GMT expires: Tue, 13 Nov 2018 20:28:32 GMT server: UploadServer status: 200 x-guploader-uploadid: AEnB2Ups1tKbTbhPmsjrPXbIuIUyQt135AlSJ1n7-7XTwMrtQ2vUvn1WwpX3a_iusfmsXHaufdf5B3H2PzmDONs2wW7tKkLarYoxrVyWalhaX6FzGQPoRW0

调试时，我发送了一个 curl 请求来模仿我们前端的请求：

curl -H "Access-Control-Request-Headers: content-type,x-goog-resumable" \ -H "Access-Control-Request-Method: POST" \ -H "Origin: https://www.example.com" \ -X OPTIONS -I https://storage.googleapis.com/bucket/...

同样，响应不包含 CORS 响应标头：

HTTP/2 200 x-guploader-uploadid: AEnB2UqwKiRSJjHjF9mzsZRMODdQmF6xhUAhdeEenuD0_WXmxpVA6n0i_HWY2NOJxvXS2t_I4IoFW_yvz6lssMz_HVmvlswL5NilGC3wE2YT0-L9aD7Pf1Q date: Tue, 13 Nov 2018 21:39:53 GMT expires: Tue, 13 Nov 2018 21:39:53 GMT cache-control: private, max-age=0 content-length: 0 server: UploadServer content-type: text/html; charset=UTF-8 alt-svc: quic=":443"; ma=2592000; v="44,43,39,35"

我已经使用gsutil cors set cors.json gs://bucketcors.json 包含的位置设置了我的存储桶 CORS 设置[{"maxAgeSeconds": 3600, "method": ["GET", "POST", "PUT", "OPTIONS"], "origin": ["*"]}]

我在这里错过了什么吗？

Answer 1

我找到了解决办法。我不得不将 x-goog-resumable 添加到响应标头列表中。

我的 CORS 文件是

[
    {
      "origin": ["*"],
      "responseHeader": [
        "Content-Type",
        "Access-Control-Allow-Origin",
        "x-goog-resumable"],
      "method": ["GET", "HEAD", "DELETE", "POST", "OPTIONS"],
      "maxAgeSeconds": 3600
    }
]

至少预检开始工作