PQsetdbLogin() in fe-connect.c in libpq
- PQsetdbLogin OPTIONS EXTENSION PATCH -
This patch to fe-connect.c is intended
to make it possible to set options like sslmode
or connect_timeout with the PQsetdbLogin() function.
This is needed as many popular interfaces or routines
(i.e. ECPG, mod_auth_pgsql ...) use PQsetdbLogin
function rather than PQconnectdb() the latter
provides for such functionnalities.
Thus most of the PQsetdbLogin limitations over
the PQconnectdb function can be avoided.
In addition, this patch prevents the setting via URL
of the parameters normally supplied to PQsetdbLogin()
outside URL as : host, login, pwd ...
Principles :
i) The parsed (pgoptions string) string is
supplied via URL for ECPG, and via
Auth_PG_Options runtime configuration
variable for mod_auth_pgsql...
In all cases the parsed string is
the string passed through the pgoptions
parameter to PQsetdbLogin
ii) If only command-line-options for backend
are supplied or no options supplied at all :
then the old behaviour fully applies.
iii) If command-line-options for backend provided
and option/value groups for sslmode, connect_timeout
or eventually for requiressl are present :
- The command-line-options must appear first (right
after the question-mark for ECPG,in parameter string
for Auth_PG_Options) and must be separated
from our options=value groups by an
ampersand ('&') character.
Of course the command-line-options for backend
may contain option=value groups of their own
if this is the cases the latter should
not be separated by '&' :
Valid examples: (for mod_auth_pgsql)
Auth_PG_Options "-c 'geqo=off'&sslmod=require"
Auth_PG_Options &sslmod=require
Auth_PG_Options sslmod=require # is valid too
# see below the
# "anti-idiosyncracy" statement.
- The other option=value groups must be separated
by an '&' character (for URL parameter compatibility.
Auth_PG_Options sslmod=require&connect_timeout=<timeout_value>
Other examples
ECPG URL example :
tcp:postgresql://<ip|domain>:5432/<dbname>[?[<options-for-backend>][<&sslmode=require|&requiressl=1>[&connect_timeout=<value>[&
...]]]]
tcp:postgresql://<Dotted IP Number>:5432/dbname?&sslmode=require
tcp:postgresql://<Dotted IP Number>:5432/dbname?sslmode=require
(for the latter example see * below)
(*) For anti-idiosyncratic convenience : if the first parameter is
one of { sslmode, requiressl, connect_timeout } the leading
ampersand might be omitted and that parameter and the
following charachers won't be considered to be intended
for the backend as (command-line-options).
So for instance
tcp:postgresql://<Dotted IP Number>:5432/dbname?sslmode=require
will be considered as
tcp:postgresql://<Dotted IP Number>:5432/dbname?&sslmode=require
See signed fe-connect.c.URL.patch file attached.
My public CD31DA11 key can be found on pgp.mit.edu keyserver
Your are welcome to send your comments to :
Waldemar Olenycz <waldem@free.fr>
