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In #1929, we removed mobile-wiki's reliance on an internal DFS bucket to store front-end assets. Unfortunately, this also removed support for brotli compression (implemented via nginx servers on the DFS nodes). This patch restores support for brotli via ember-cli-deploy and ember-cli-deploy-compress plugins to generate compressed assets during the build step and serve them via express-static-gzip if the client supports them. In order to actually enable brotli support, we will need to update our Fastly VCL as well to ensure that we normalize the Accept-Encoding header to 'br' if the client supports brotli. If we're not careful, this will invalidate all mobile-wiki asset URLs, causing clients requesting older versions of asset URLs embedded in cached HTML to be served a 404 from the current deployment and fail. To fully remedy this, we may need to re-introduce semi-persistent asset storage in either s3 or GCS, but for now, let's just change the asset URL paths so that we can update the VCL logic only for the new paths, without invalidating the old URLs.
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In #1929, we removed mobile-wiki's
reliance on an internal DFS bucket to store front-end assets. Unfortunately,
this also removed support for brotli compression (implemented via nginx servers
on the DFS nodes).
This patch restores support for brotli via ember-cli-deploy and
ember-cli-deploy-compress plugins to generate compressed assets during the build
step and serve them via express-static-gzip if the client supports them.
In order to actually enable brotli support, we will need to update our Fastly
VCL as well to ensure that we normalize the Accept-Encoding header to 'br' if
the client supports brotli. If we're not careful, this will invalidate all
mobile-wiki asset URLs, causing clients requesting older versions of asset
URLs embedded in cached HTML to be served a 404 from the current deployment and
fail. To fully remedy this, we may need to re-introduce semi-persistent asset
storage in either s3 or GCS, but for now, let's just change the asset URL paths
so that we can update the VCL logic only for the new paths, without invalidating
the old URLs.