Tag reading when the database does not exist

[pavel-krivanek]

When the database you try to connect does not exist, the method
P3MessageBuffer>>#readFrom: (called from P3Client>>#readMessageOnError:)
fails because the readStream next returns nil and the internal error handling does not expect such case.

[svenvc]

I get a clean error, instance of P3Error with message

P3Error PostgreSQL database "foo" does not exist

when I try to connect to a non existing DB

P3Client url: 'psql://sven@localhost/foo'

and then do #isWorking

[pavel-krivanek]

I got this error while connecting using Glorp via P3DatabaseDriver. The password is set to nil which may be part of the problem.
Then the issue raises from: P3Client>>#runAuthentication, specifically from self readMessageCloseAfterError tag. The socket is closed.

[pavel-krivanek]

So the nil password is not really an issue, it is set correctly. I was just confused by the fact that Glorp deletes the password from the Login instance after the first usage (and it does not use discardPassword message for it)

[pavel-krivanek]

to reproduce in my setup, I just need to do

        connection := P3Client new.
	connection 
		host: 'localhost';
		port: 5433;
		database: 'pdmCC';
		user: 'pdm';
		password: 'somePassword'.
	connection connect

Where everything except the database name is correct.

[pavel-krivanek]

It is PostgreSQL 12

[svenvc]

I was on 11.6, now also on 12.1

P3Client new 
		host: 'localhost';
		port: 5432;
		database: 'pdmCC';
		user: 'sven';
		"password: '';"
		connect.

still gives me a clean P3Error.

Note that #readMessageCloseAfterError does a #close hence the connection will be nil (after the info is read - the dictionary is filled in correctly).

I am using https://postgresapp.com on macOS, Pharo 7.0.1 FWIW

[pavel-krivanek]

We are on Pharo 9.0 and Windows...

[svenvc]

This sometimes happens in regular use as well.

It seems that at that point the underlying socket stream is in the state 'otherEndClosedButNotThisEnd'.

It remains hard to reproduce though.