Sebastian Nagel created NUTCH-1455:
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Summary: RobotRulesParser to match multi-word user-agent names
Key: NUTCH-1455
URL: https://issues.apache.org/jira/browse/NUTCH-1455
Project: Nutch
Issue Type: Bug
Components: protocol
Affects Versions: 1.5.1
Reporter: Sebastian Nagel
If the user-agent name(s) configured in http.robots.agents contains spaces it
is not matched even if is exactly contained in the robots.txt
http.robots.agents = "Download Ninja,*"
If the robots.txt (http://en.wikipedia.org/robots.txt) contains
{code}
User-agent: Download Ninja
Disallow: /
{code}
all content should be forbidden. But it isn't:
{code}
% curl 'http://en.wikipedia.org/robots.txt' > robots.txt
% grep -A1 -i ninja robots.txt
User-agent: Download Ninja
Disallow: /
% cat test.urls
http://en.wikipedia.org/
% bin/nutch plugin lib-http org.apache.nutch.protocol.http.api.RobotRulesParser
robots.txt test.urls 'Download Ninja'
...
allowed: http://en.wikipedia.org/
{code}
The rfc (http://www.robotstxt.org/norobots-rfc.txt) states that
bq. The robot must obey the first record in /robots.txt that contains a
User-Agent line whose value contains the name token of the robot as a
substring.
Assumed that "Downlaod Ninja" is a substring of itself it should match and
http://en.wikipedia.org/ should be forbidden.
The point is that the agent name from the User-Agent line is split at spaces
while the names from the http.robots.agents property are not (they are only
split at ",").
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