From 755dfdc2e16f2f7f5fa6669cb81d0ec3118ec203 Mon Sep 17 00:00:00 2001
From: Damien Ciabrini <damien.ciabrini@gmail.com>
Date: Wed, 16 Nov 2016 13:11:03 +0100
Subject: [PATCH] Add bind_address option (#529)
Allow connecting to the DB from a specific network interface
---
pymysql/connections.py | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/pymysql/connections.py b/pymysql/connections.py
index d5e39a1..2884cdc 100644
--- a/pymysql/connections.py
+++ b/pymysql/connections.py
@@ -534,7 +534,8 @@ class Connection(object):
compress=None, named_pipe=None, no_delay=None,
autocommit=False, db=None, passwd=None, local_infile=False,
max_allowed_packet=16*1024*1024, defer_connect=False,
- auth_plugin_map={}, read_timeout=None, write_timeout=None):
+ auth_plugin_map={}, read_timeout=None, write_timeout=None,
+ bind_address=None):
"""
Establish a connection to the MySQL database. Accepts several
arguments:
@@ -544,6 +545,9 @@ class Connection(object):
password: Password to use.
database: Database to use, None to not use a particular one.
port: MySQL port to use, default is usually OK. (default: 3306)
+ bind_address: When the client has multiple network interfaces, specify
+ the interface from which to connect to the host. Argument can be
+ a hostname or an IP address.
unix_socket: Optionally, you can use a unix socket rather than TCP/IP.
charset: Charset you want to use.
sql_mode: Default SQL_MODE to use.
@@ -632,6 +636,7 @@ class Connection(object):
database = _config("database", database)
unix_socket = _config("socket", unix_socket)
port = int(_config("port", port))
+ bind_address = _config("bind-address", bind_address)
charset = _config("default-character-set", charset)
self.host = host or "localhost"
@@ -640,6 +645,7 @@ class Connection(object):
self.password = password or ""
self.db = database
self.unix_socket = unix_socket
+ self.bind_address = bind_address
if read_timeout is not None and read_timeout <= 0:
raise ValueError("read_timeout should be >= 0")
self._read_timeout = read_timeout
@@ -884,10 +890,14 @@ class Connection(object):
self.host_info = "Localhost via UNIX socket"
if DEBUG: print('connected using unix_socket')
else:
+ kwargs = {}
+ if self.bind_address is not None:
+ kwargs['source_address'] = (self.bind_address, 0)
while True:
try:
sock = socket.create_connection(
- (self.host, self.port), self.connect_timeout)
+ (self.host, self.port), self.connect_timeout,
+ **kwargs)
break
except (OSError, IOError) as e:
if e.errno == errno.EINTR:
--
2.5.5