python fdb, trying to connect to an external firebird 1.5 super server

问题

I'm trying to connect to a Firebird 1.5 database that is located on a server, from my local machine with Python fdb libary. but I'm having no luck.
the server is windows 2008 server R1 running Firebird 1.5.6 as a service. It also has a System DSN called firebird.
How can i connect to it via python? I'm using this code:

import fdb
db = fdb.connect(host='192.168.40.28', database="C:\databases\database12.GDB", user='admin', password='admin')

but it generates this result:

Traceback (most recent call last):
  File "data.py", line 4, in <module>
    db = fdb.connect(host='192.168.40.28', database="C:\databases\database12.GDB", user='admin', password='admin')
  File "/usr/local/lib/python2.7/dist-packages/fdb/fbcore.py", line 666, in connect
    "Error while connecting to database:")
fdb.fbcore.DatabaseError: ('Error while connecting to database:\n- SQLCODE: -902\n- Unable to complete network request to host "192.168.40.28".\n- Failed to establish a connection.', -902, 335544721)

what am I doing wrong here?

回答1:

Assuming that the IP 192.168.40.28 is correct my next quess would be that you don't have the port 3050 open (thats the default port for Firebird). Check your server's firewall and open the port. You can use some other port instead of 3050 by seting the RemoteServicePort parameter in the firebird.conf file, but then you have to set the port parameter in the connect method too.

回答2:

As other answers have stated, check that port 3050 is open.

However, fdb only supports Firebird 2.0 or higher. For Firebird 1.5, you can use either pyodbc or pyfirebirdsql

Note that, among other issues (like not handling Firebird INTEGER datatypes properly), pyfirebirdsql isn't 100% compliant with PEP 249 -- Python DB API 2.0 as calls to Cursor.rowcount always return -1.

Edit: After posting this, I took it upon myself to write the code for pyfirebirdsql's rowcount function, so now it works as expected, instead of always returning 1. Shortly after that, the pyfirebirdsql author fixed the INTEGER issues as well.

回答3:

You must to check the port open in your host as ain said. BTW, fdb is just for firebird 2.0 and higher. Check it out. https://fdb.readthedocs.org/en/latest/getting-started.html#installation

来源：https://stackoverflow.com/questions/15704760/python-fdb-trying-to-connect-to-an-external-firebird-1-5-super-server

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python

windows-server-2008

firebird