查詢DNS時GAE超時

我正在嘗試使用腳本來檢查電子郵件是否存在。爲此，我使用DNS查詢。這是一個失敗的呼叫：查詢DNS時GAE超時

from dns import resolver 
mx_data = resolver.query(hostname, 'MX', source='')

它的工作原理，如果我執行使用python腳本獨立的，但是當它的AppEngine運行在本地或遠程失敗。堆棧跟蹤：

File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 1535, in __call__ 
    rv = self.handle_exception(request, response, e) 
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 1529, in __call__ 
    rv = self.router.dispatch(request, response) 
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 1278, in default_dispatcher 
    return route.handler_adapter(request, response) 
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 1102, in __call__ 
    return handler.dispatch() 
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 572, in dispatch 
    return self.handle_exception(e, self.app.debug) 
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 570, in dispatch 
    return method(*args, **kwargs) 
File "/Users/user/dev/gaeapp/request.py", line 5827, in get 
    check2 = email_checker.validate_email(email) 
File "/Users/user/dev/gaeapp/tools/email_checker.py", line 89, in validate_email 
    mx_data = resolver.query(hostname, 'MX') 
File "/Users/user/dev/gaeapp/dns/resolver.py", line 974, in query 
    raise_on_no_answer, source_port) 
File "/Users/user/dev/gaeapp/dns/resolver.py", line 894, in query 
    timeout = self._compute_timeout(start) 
File "/Users/user/dev/gaeapp/dns/resolver.py", line 734, in _compute_timeout 
    raise Timeout

我有一個類似的問題的問題DNS query using Google App Engine socket但我試着打電話查詢與參數源=「」沒有成功。

我使用dnspython 1.11.1

UPDATE：它的工作原理後，手動設置DNS解析器：

r = resolver.Resolver() 
r.nameservers = ['8.8.8.8', '8.8.4.4'] 
mx_data = r.query(hostname, 'MX')

來源

2013-11-04 dablak

一個顯而易見的問題是您使用的是哪種解析器？查看代碼resolver.query將調用get_default_resolver（）您是否已經建立了解析器列表，如果這些從解釋器的角度來看是有意義的？ –

@TimHoffman這是一個很好的觀點。我已經將Google DNS服務器添加爲解析器，並且可以正常工作。 – dablak

正如蒂姆說，你需要明確設置的解析器。

示例代碼：

import dns.resolver 

resolver = dns.resolver.Resolver() 
resolver.nameservers = ['8.8.8.8'] 
mx_data = resolver.query(hostname, 'MX')

注意8.8.8.8是Google的DNS服務器，但可以是任何其他。

另請注意，您不需要設置source =''

來源

2015-09-02 12:34:49

查詢DNS時GAE超時

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