Firebase Cloud Functions (HTTP Triggers + gzip)

[Ivan Rocha]

Hi,

   Does any one knows how to send gzipped content using Firebase Cloud Functions + HTTP Trigger? It seems that even if you set Content-Encoding header and send gzip data, everything is ignored... 

   Regards,

       Ivan

[Chris Raynor]

Hi Ivan

Your function will have to handle the compression based on the input - Cloud Functions will not do anything here in this regards

The good news is this is pretty simple using the compression npm package:

exports.myFunc = functions.https.onRequest((req, res) => {
  compression(req, res, () => {
  });
});

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[Ivan Rocha]

Thanks Chris, but I found the 'real' problem that I was facing. You only need to use a combination of request headers (Accept-Encoding, User-Agent) supporting compressed output, see:

curl -v "https://us-central1-<project>.cloudfunctions.net/test" -H "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36" -H "Accept-Encoding: gzip"

> GET /test HTTP/1.1

> Host: us-central1-<project>.cloudfunctions.net

> Accept: */*

> User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36

> Accept-Encoding: gzip

> 

< HTTP/1.1 200 OK

< content-type: application/json; charset=utf-8

...

< Content-Encoding: gzip

...

< Server: Google Frontend

< Transfer-Encoding: chunked

...

Caveat:

If you send an user agent like curl/7.47.0 or HTTPie/0.9.2, the output will not be compressed. (weird)

I tried using the compression module and I got the same behavior as above.

Regards,

    Ivan