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add some debug info when resolving hostnames. see #5466

This commit is contained in:
Yann Leboulanger 2010-01-12 15:29:40 +01:00
parent 7795318707
commit cbbfe98d32
1 changed files with 5 additions and 0 deletions
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5
src/common/resolver.py
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@ -62,6 +62,7 @@ class CommonResolver():
self.handlers = {} self.handlers = {}
def resolve(self, host, on_ready, type='srv'): def resolve(self, host, on_ready, type='srv'):
log.debug('resolve %s type=%s' % (host, type))
assert(type in ['srv', 'txt']) assert(type in ['srv', 'txt'])
if not host: if not host:
# empty host, return empty list of srv records # empty host, return empty list of srv records
@ -69,19 +70,23 @@ class CommonResolver():
return return
if self.resolved_hosts.has_key(host+type): if self.resolved_hosts.has_key(host+type):
# host is already resolved, return cached values # host is already resolved, return cached values
log.debug('%s already resolved: %s')
on_ready(host, self.resolved_hosts[host+type]) on_ready(host, self.resolved_hosts[host+type])
return return
if self.handlers.has_key(host+type): if self.handlers.has_key(host+type):
# host is about to be resolved by another connection, # host is about to be resolved by another connection,
# attach our callback # attach our callback
log.debug('already resolving %s' % host)
self.handlers[host+type].append(on_ready) self.handlers[host+type].append(on_ready)
else: else:
# host has never been resolved, start now # host has never been resolved, start now
log.debug('Starting to resolve %s using %s' % (host, self))
self.handlers[host+type] = [on_ready] self.handlers[host+type] = [on_ready]
self.start_resolve(host, type) self.start_resolve(host, type)
def _on_ready(self, host, type, result_list): def _on_ready(self, host, type, result_list):
# practically it is impossible to be the opposite, but who knows :) # practically it is impossible to be the opposite, but who knows :)
log.debug('Resolving result for %s: %s' % (host, result_list))
if not self.resolved_hosts.has_key(host+type): if not self.resolved_hosts.has_key(host+type):
self.resolved_hosts[host+type] = result_list self.resolved_hosts[host+type] = result_list
if self.handlers.has_key(host+type): if self.handlers.has_key(host+type):