如何从 Cloud Functions for Firebase 文件夹读取证书文件

Question

I am trying to read a file under certs folder as shown below:

-functions
 |
--certs
  |
---idp-public-cert.perm

Here is the code I am using to read the file:

fs.readFileSync(path.join(__dirname, 'certs/idp-public-cert.pem')) .

When I run the function, I get the following errors:

Error: ENOENT: no such file or directory, open '/srv/lib/certs/idp-public-cert.pem'

I would appreciate any crew on how to do this. Thanks in advance.

Answer 1

Just read the file using the relative path certs/idp-public-cert.pem . All relative paths will be interpreted relative to your deployed functions folder. Don't try to build a full path to the file, as you shouldn't assume where your code deployment is effectively mounted in the server instance.

Answer 2

I found that specifying path with "./" or "/" is iffy - because it takes a relative patch from somewhere, maybe OLDPWD or PWD, not sure how it messes up But I found that the right way to do fix is to add __dirname to the path. __dirname will give the path of the functions directory. so if your function is in /home/username/firebase/functions/routes, then __dirname will show you that. So if you have a file /home/username/firebase/abc/, then you would have to specify: fs.readFileSync(__dirname+"../abc/"

Hope this saves the time of others!! I wasted so much time on this, it was quite frustrating, and was kicking myself for not reading the doc!