.. _example_setup_ctx:
==============================
Lookup from threads
==============================
This example shows how to use unbound module from a threaded program.
In this example, three lookup threads are created which work in background.
Each thread resolves different DNS record.
::
#!/usr/bin/python
from unbound import ub_ctx, RR_TYPE_A, RR_CLASS_IN
from threading import Thread
ctx = ub_ctx()
ctx.resolvconf("/etc/resolv.conf")
class LookupThread(Thread):
def __init__(self,ctx, name):
Thread.__init__(self)
self.ctx = ctx
self.name = name
def run(self):
print "Thread lookup started:",self.name
status, result = self.ctx.resolve(self.name, RR_TYPE_A, RR_CLASS_IN)
if status == 0 and result.havedata:
print " Result:",self.name,":", result.data.address_list
threads = []
for name in ["www.fit.vutbr.cz","www.vutbr.cz","www.google.com"]:
thread = LookupThread(ctx, name)
thread.start()
threads.append(thread)
for thread in threads:
thread.join()