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.

Source code

#!/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()