firebase serve --only hosting does not work offline

[samtstern]

Version info

6.1.0

Platform Information

OS X

Steps to reproduce

1. Turn of WiFi
2. Run firebase serve --only hosting in a configured project directory

Expected behavior

Run server while offline (train, airplane, etc)

Actual behavior

$ firebase serve --only hosting

Error: Server Error. getaddrinfo ENOTFOUND cloudresourcemanager.googleapis.com cloudresourcemanager.googleapis.com:443

Full logs:

[debug] [2018-11-27T17:35:10.113Z] ----------------------------------------------------------------------
[debug] [2018-11-27T17:35:10.114Z] Command:       /Users/samstern/.nvm/versions/node/v8.12.0/bin/node /Users/samstern/.nvm/versions/node/v8.12.0/bin/firebase serve --only hosting
[debug] [2018-11-27T17:35:10.114Z] CLI Version:   6.1.1
[debug] [2018-11-27T17:35:10.114Z] Platform:      darwin
[debug] [2018-11-27T17:35:10.114Z] Node Version:  v8.12.0
[debug] [2018-11-27T17:35:10.115Z] Time:          Tue Nov 27 2018 09:35:10 GMT-0800 (PST)
[debug] [2018-11-27T17:35:10.115Z] ----------------------------------------------------------------------
[debug] 
[debug] [2018-11-27T17:35:10.125Z] > command requires scopes: ["email","openid","https://www.googleapis.com/auth/cloudplatformprojects.readonly","https://www.googleapis.com/auth/firebase","https://www.googleapis.com/auth/cloud-platform"]
[debug] [2018-11-27T17:35:10.126Z] > authorizing via signed-in user
[debug] [2018-11-27T17:35:10.126Z] [iam] checking project fir-oss for permissions ["firebase.projects.get"]
[debug] [2018-11-27T17:35:10.127Z] >>> HTTP REQUEST POST https://cloudresourcemanager.googleapis.com/v1/projects/fir-oss:testIamPermissions  

[debug] [2018-11-27T17:35:10.162Z] Error: getaddrinfo ENOTFOUND cloudresourcemanager.googleapis.com cloudresourcemanager.googleapis.com:443
    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:67:26)
[error] 
[error] Error: Server Error. getaddrinfo ENOTFOUND cloudresourcemanager.googleapis.com cloudresourcemanager.googleapis.com:443
[debug] [2018-11-27T17:35:19.533Z] ----------------------------------------------------------------------
[debug] [2018-11-27T17:35:19.535Z] Command:       /Users/samstern/.nvm/versions/node/v8.12.0/bin/node /Users/samstern/.nvm/versions/node/v8.12.0/bin/firebase serve --only hosting
[debug] [2018-11-27T17:35:19.535Z] CLI Version:   6.1.1
[debug] [2018-11-27T17:35:19.535Z] Platform:      darwin
[debug] [2018-11-27T17:35:19.535Z] Node Version:  v8.12.0
[debug] [2018-11-27T17:35:19.536Z] Time:          Tue Nov 27 2018 09:35:19 GMT-0800 (PST)
[debug] [2018-11-27T17:35:19.536Z] ----------------------------------------------------------------------
[debug] 
[debug] [2018-11-27T17:35:19.545Z] > command requires scopes: ["email","openid","https://www.googleapis.com/auth/cloudplatformprojects.readonly","https://www.googleapis.com/auth/firebase","https://www.googleapis.com/auth/cloud-platform"]
[debug] [2018-11-27T17:35:19.547Z] > authorizing via signed-in user
[debug] [2018-11-27T17:35:19.547Z] [iam] checking project fir-oss for permissions ["firebase.projects.get"]
[debug] [2018-11-27T17:35:19.549Z] >>> HTTP REQUEST POST https://cloudresourcemanager.googleapis.com/v1/projects/fir-oss:testIamPermissions  

[debug] [2018-11-27T17:35:19.573Z] Error: getaddrinfo ENOTFOUND cloudresourcemanager.googleapis.com cloudresourcemanager.googleapis.com:443
    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:67:26)
[error] 
[error] Error: Server Error. getaddrinfo ENOTFOUND cloudresourcemanager.googleapis.com cloudresourcemanager.googleapis.com:443

[bkendall]

Well, it's not a bug, AFAIK... I'm gonna take this as a feature request and pass it to @mbleigh...

[samtstern]

@bkendall what are we checking with the Resource Manager API on each serve? I can understand how this might not work offline for first-run but I would expect it to work ~5seconds after running an online serve.

[mbleigh]

serve currently calls out to fetch the current project's web app config before starting up the server. I'd be amenable to making that a "logs a warning instead" thing.

[philipwalton]

Please make it possible to run a development server without an internet connection. I was not able to get any work done on my flight today because I couldn't start my local server.

[bkendall]

We hear ya, @philipwalton - unfortunately, we have limited resources to address this at the moment. PRs are always welcome 😄

[philipwalton]

After looking around in the source a bit, I realized that this library just uses superstatic under the hood for hosting (which is released as its own, separate module), so if all you need is a local static file server with config that matches your Firebase hosting environment, you can just use superstatic on its own.

Bonus: it's just connect/express-style middleware, so it easy to extend if you need to!

[jewelcse]

asaaaaaaaaaaaaaaaaaaaaaaaaaa

[thisismydesign]

@philipwalton Could you show an example with superstatic?

[philipwalton]

Here's how I'm using this on my personal blog: https://github.com/philipwalton/blog/blob/21fde735815d7c3620ecfb0f5f1c81df9d94874f/tasks/utils/server.js#L16

[samtstern]

You can run the hosting emulator offline using emulators:start so I am going to close this issue!