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IP_ADDRESS_CACHE cache improvements #501

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merged 1 commit into from
Apr 1, 2024
Merged

IP_ADDRESS_CACHE cache improvements #501

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2 changes: 1 addition & 1 deletion parsedmarc/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -48,7 +48,7 @@
MAGIC_XML = b"\x3c\x3f\x78\x6d\x6c\x20"
MAGIC_JSON = b"\7b"

IP_ADDRESS_CACHE = ExpiringDict(max_len=10000, max_age_seconds=1800)
IP_ADDRESS_CACHE = ExpiringDict(max_len=10000, max_age_seconds=14400)
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It may worth making this a config file setting, defaulting to the initial 1800, as different use-cases may warrant different values.

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Yes, making it a config file setting may be a good enhancement, but it may take me a while to figure out how to do it. I can take a look at it after the holiday.

I don't think that there are currently many people locked into the 1,800 setting since it was not working at all until last week.

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If someone would like to contribute a PR to add that option, be aware that although IP_ADDRESS_CACHE is only referenced twice:

https://github.com/domainaware/parsedmarc/blob/master/parsedmarc/__init__.py#L103

https://github.com/domainaware/parsedmarc/blob/master/parsedmarc/__init__.py#L897

configuration items related to report processing must go through several layers of function calls, such as when I just added the new function calls to address the concerns raised in #500.

041296b...acef7bd

REVERSE_DNS_MAP = dict()


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14 changes: 7 additions & 7 deletions parsedmarc/utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -172,7 +172,8 @@ def get_reverse_dns(ip_address, cache=None, nameservers=None, timeout=2.0):
nameservers=nameservers,
timeout=timeout)[0]

except dns.exception.DNSException:
except dns.exception.DNSException as e:
logger.warning(f"get_reverse_dns({ip_address}) exception: {e}")
pass

return hostname
Expand Down Expand Up @@ -379,10 +380,6 @@ def get_ip_address_info(ip_address, ip_db_path=None,
if info:
logger.debug(f"IP address {ip_address} was found in cache")
return info
else:
logger.debug(f"IP address {ip_address} not found in cache")
else:
logger.debug("IP address cache was not specified")
info = OrderedDict()
info["ip_address"] = ip_address
if offline:
Expand All @@ -407,8 +404,11 @@ def get_ip_address_info(ip_address, ip_db_path=None,
info["type"] = service["type"]
info["name"] = service["name"]

if cache is not None:
cache[ip_address] = info
if cache is not None:
cache[ip_address] = info
logger.debug(f"IP address {ip_address} added to cache")
else:
logger.debug(f"IP address {ip_address} reverse_dns not found")

return info

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