Firebase Hosting - CDN cache-control questions

[Matt]

Am I fine to use a cache-control max age of 1 year as it looks like (and I have read) that on deploy everything is invalidated on the CDN.

Is there any way to see CDN stats of hits/misses, locations etc. I do use Google Analytics.

What is the correct way to set a cache-control header on index.html, the following don't seem to work and I get the usual max-age=3600 response. Posting the full firebase.json incase something conflicts.

Thanks in advance!!

{

  "hosting": {

    "public": "public",

    "rewrites": [

      {

        "source": "**",

        "destination": "/index.html"

      }

    ],

  

"headers": [ {

  "source" : "**/*.@(eot|otf|ttf|ttc|woff|font.css)",

  "headers" : [ {

    "key" : "Access-Control-Allow-Origin",

    "value" : "*"

  } ]

}, {

  "source" : "**/*.@(jpg|jpeg|gif|png|ico|webp|js)",

  "headers" : [ {

    "key" : "Cache-Control",

    "value" : "max-age=604800"

  } ]

}, {

  "source" : "**/*.@(html|css",

  "headers" : [ {

    "key" : "Cache-Control",

    "value" : "max-age=7200"

  } ]

  }, {

  "source" : "index.html",

  "headers" : [ {

    "key" : "Cache-Control",

    "value" : "max-age=604800"

  } ]

} ]

  }

}

[Michael Bleigh]

The Cache-Control header on Firebase Hosting static content is telling the browser what to cache, not the CDN. So unless you're using asset fingerprinting to guarantee unique URLs every time you redeploy, you should not set longer Cache-Control max age than you're comfortable having cached in someone's browser.

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