Setting If-None-Match Request Headers for Cross-Origin Requests










1















I need to use the If-None-Match header to stream content to the browser, which I believe is supported by GCS.



I'm getting the signed URL via Firebase Storage, and I've configured my bucket for CORs, but I'm still getting the following in the browser:



Request header field If-None-Match is not allowed by Access-Control-Allow-Headers in preflight response


My CORS configuration for the GCS bucket is:



[

"origin": ["*"],
"method": ["GET"],
"maxAgeSeconds": 3600,
"responseHeader": ["If-None-Match"]

]


I read that you could include your request headers in response headers field to allow them, but this doesn't seem to work.



What is the best way to achieve this?



Thanks!
Leo










share|improve this question




























    1















    I need to use the If-None-Match header to stream content to the browser, which I believe is supported by GCS.



    I'm getting the signed URL via Firebase Storage, and I've configured my bucket for CORs, but I'm still getting the following in the browser:



    Request header field If-None-Match is not allowed by Access-Control-Allow-Headers in preflight response


    My CORS configuration for the GCS bucket is:



    [

    "origin": ["*"],
    "method": ["GET"],
    "maxAgeSeconds": 3600,
    "responseHeader": ["If-None-Match"]

    ]


    I read that you could include your request headers in response headers field to allow them, but this doesn't seem to work.



    What is the best way to achieve this?



    Thanks!
    Leo










    share|improve this question


























      1












      1








      1








      I need to use the If-None-Match header to stream content to the browser, which I believe is supported by GCS.



      I'm getting the signed URL via Firebase Storage, and I've configured my bucket for CORs, but I'm still getting the following in the browser:



      Request header field If-None-Match is not allowed by Access-Control-Allow-Headers in preflight response


      My CORS configuration for the GCS bucket is:



      [

      "origin": ["*"],
      "method": ["GET"],
      "maxAgeSeconds": 3600,
      "responseHeader": ["If-None-Match"]

      ]


      I read that you could include your request headers in response headers field to allow them, but this doesn't seem to work.



      What is the best way to achieve this?



      Thanks!
      Leo










      share|improve this question
















      I need to use the If-None-Match header to stream content to the browser, which I believe is supported by GCS.



      I'm getting the signed URL via Firebase Storage, and I've configured my bucket for CORs, but I'm still getting the following in the browser:



      Request header field If-None-Match is not allowed by Access-Control-Allow-Headers in preflight response


      My CORS configuration for the GCS bucket is:



      [

      "origin": ["*"],
      "method": ["GET"],
      "maxAgeSeconds": 3600,
      "responseHeader": ["If-None-Match"]

      ]


      I read that you could include your request headers in response headers field to allow them, but this doesn't seem to work.



      What is the best way to achieve this?



      Thanks!
      Leo







      firebase google-cloud-platform cors google-cloud-storage firebase-storage






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 14 '18 at 10:47







      Leo

















      asked Nov 13 '18 at 17:05









      LeoLeo

      262




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