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I have the following code to do a postback to a remote URL:
request = urllib2.Request('http://www.example.com', postBackData, { 'User-Agent' : 'My User Agent' }) try: response = urllib2.urlopen(request) except urllib2.HTTPError, e: checksLogger.error('HTTPError = ' + str(e.code)) except urllib2.URLError, e: checksLogger.error('URLError = ' + str(e.reason)) except httplib.HTTPException, e: checksLogger.error('HTTPException') The postBackData is created using a dictionary encoded using urllib.urlencode. checksLogger is a logger using logging.
I have had a problem where this code runs when the remote server is down and the code exits (this is on customer servers so I don't know what the exit stack dump / error is at this time). I'm assuming this is because there is an exception and/or error that is not being handled. So are there any other exceptions that might be triggered that I'm not handling above?
793
request is a Python module for fetching URLs (Uniform Resource Locators). It offers a very simple interface, in the form of the urlopen function. This is capable of fetching URLs using a variety of different protocols.
The data returned by urlopen() or urlretrieve() is the raw data returned by the server. This may be binary data (such as an image), plain text or (for example) HTML. The HTTP protocol provides type information in the reply header, which can be inspected by looking at the Content-Type header.
error module defines the exception classes for exceptions raised by urllib. request . The base exception class is URLError . The handlers raise this exception (or derived exceptions) when they run into a problem.
So in layman terms urlopen() opens a connection to the url and response.
Add generic exception handler:
request = urllib2.Request('http://www.example.com', postBackData, { 'User-Agent' : 'My User Agent' }) try: response = urllib2.urlopen(request) except urllib2.HTTPError, e: checksLogger.error('HTTPError = ' + str(e.code)) except urllib2.URLError, e: checksLogger.error('URLError = ' + str(e.reason)) except httplib.HTTPException, e: checksLogger.error('HTTPException') except Exception: import traceback checksLogger.error('generic exception: ' + traceback.format_exc()) If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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