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https://issues.apache.org/jira/browse/NUTCH-3087?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17894554#comment-17894554
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Hiran Chaudhuri edited comment on NUTCH-3087 at 10/31/24 1:07 PM:
------------------------------------------------------------------
Nutch could do with a couple debug statements more. Having added them myself I
now found this in my logfile:
{code:java}
2024-10-31 13:40:54,944 DEBUG
org.apache.nutch.net.urlnormalizer.basic.BasicURLNormalizer [pool-6-thread-1]
normalize(smb://hi...@nas.fritz.box/Documents/Hiran/Monitoring/architektur.dia%7E,
outlink)
2024-10-31 13:40:54,945 DEBUG
org.apache.nutch.net.urlnormalizer.regex.RegexURLNormalizer [pool-6-thread-1]
normalize(smb://nas.fritz.box/Documents/Hiran/Monitoring/architektur.dia~,
outlink)
2024-10-31 13:40:54,945 DEBUG
org.apache.nutch.net.urlnormalizer.regex.RegexURLNormalizer [pool-6-thread-1]
regexNormalize(smb://nas.fritz.box/Documents/Hiran/Monitoring/architektur.dia~,
outlink)
2024-10-31 13:40:54,945 DEBUG
org.apache.nutch.net.urlnormalizer.pass.PassURLNormalizer [pool-6-thread-1]
normalize(smb://nas.fritz.box/Documents/Hiran/Monitoring/architektur.dia~,
outlink)
2024-10-31 13:40:54,945 INFO org.apache.nutch.net.URLNormalizers
[pool-6-thread-1] normalized
smb://hi...@nas.fritz.box/Documents/Hiran/Monitoring/architektur.dia%7E ->
smb://nas.fritz.box/Documents/Hiran/Monitor {code}
So for one URL the different normalizers get invoked one by one, and the last
line shows that in total the URL was normalized and lost the userinfo.
The lines above show that BasicURLNormalizer.normalize was called with a good
link the RegexURLNormalizer afterwards already received a bad URL. Thus the
issue must lie in BasicURLNormalizer.
was (Author: hiranchaudhuri):
Nutch could do with a couple debug statements more. I now found this in my
logfile:
{code:java}
2024-10-31 13:40:54,944 DEBUG
org.apache.nutch.net.urlnormalizer.basic.BasicURLNormalizer [pool-6-thread-1]
normalize(smb://hi...@nas.fritz.box/Documents/Hiran/Monitoring/architektur.dia%7E,
outlink)
2024-10-31 13:40:54,945 DEBUG
org.apache.nutch.net.urlnormalizer.regex.RegexURLNormalizer [pool-6-thread-1]
normalize(smb://nas.fritz.box/Documents/Hiran/Monitoring/architektur.dia~,
outlink)
2024-10-31 13:40:54,945 DEBUG
org.apache.nutch.net.urlnormalizer.regex.RegexURLNormalizer [pool-6-thread-1]
regexNormalize(smb://nas.fritz.box/Documents/Hiran/Monitoring/architektur.dia~,
outlink)
2024-10-31 13:40:54,945 DEBUG
org.apache.nutch.net.urlnormalizer.pass.PassURLNormalizer [pool-6-thread-1]
normalize(smb://nas.fritz.box/Documents/Hiran/Monitoring/architektur.dia~,
outlink)
2024-10-31 13:40:54,945 INFO org.apache.nutch.net.URLNormalizers
[pool-6-thread-1] normalized
smb://hi...@nas.fritz.box/Documents/Hiran/Monitoring/architektur.dia%7E ->
smb://nas.fritz.box/Documents/Hiran/Monitor {code}
So for one URL the different normalizers get invoked one by one, and the last
line shows that in total the URL was normalized and lost the userinfo.
The lines above show that BasicURLNormalizer.normalize was called with a good
link the RegexURLNormalizer afterwards already received a bad URL. Thus the
issue must lie in BasicURLNormalizer.
> Nutch crawling inconsistent on URLs with userinfo
> -------------------------------------------------
>
> Key: NUTCH-3087
> URL: https://issues.apache.org/jira/browse/NUTCH-3087
> Project: Nutch
> Issue Type: Bug
> Affects Versions: 1.21
> Reporter: Hiran Chaudhuri
> Priority: Major
>
> I am trying to scan the URL
> smb://hi...@nas.fritz.box/Documents/Hiran/Monitoring/
> Note the userinfo 'hiran', which is used for authentication on the server.
> (The smb plugin pulls credentials from another configuration file, but this
> is irrelevant here).
> The URL is fetched, parsed, updated in the crawldb and sent to the indexer.
> So far so good. But the outlinks that are detected are of different quality:
> some have the userinfo preserved, some are missing that information.
> Dumping the segment I can see the below data. Note that some of the outlinks
> start with smb://hi...@nas.fritz.box, while others start with
> smb://nas.fritz.box. The impact is that on the next fetch run authentication
> information is missing and the URLs cannot be fetched further.
>
> {code:java}
> Recno:: 0
> URL:: smb://hi...@nas.fritz.box/Documents/Hiran/Monitoring/
> CrawlDatum::
> Version: 7
> Status: 1 (db_unfetched)
> Fetch time: Tue Oct 29 22:56:58 CET 2024
> Modified time: Thu Jan 01 01:00:00 CET 1970
> Retries since fetch: 0
> Retry interval: 86400 seconds (1 days)
> Score: 1.0
> Signature: null
> Metadata:
> _ngt_=1730239026566
> Content::
> Version: -1
> url: smb://hi...@nas.fritz.box/Documents/Hiran/Monitoring/
> base: smb://hi...@nas.fritz.box/Documents/Hiran/Monitoring/.
> contentType: text/html
> metadata: nutch.segment.name=20241029225708 _fst_=33 nutch.crawl.score=1.0
> Content:
> <html><head><title>Index of
> /Documents/Hiran/Monitoring/</title></head><body><h1>Index of
> /Documents/Hiran/Monitoring/</h1><pre><a href=".svn/">.svn/ Tue Oct 24
> 13:32:32 CEST 2017</a>
> <a href="architektur.dia">architektur.dia Mon Feb 22 21:30:33 CET 2010</a>
> <a href="architektur.dia%7E">architektur.dia~ Mon Feb 22 21:20:42 CET
> 2010</a>
> <a href="architektur.png">architektur.png Mon Feb 22 21:34:27 CET 2010</a>
> <a href="deployment.dia">deployment.dia Mon Feb 22 22:56:15 CET 2010</a>
> <a href="deployment.dia%7E">deployment.dia~ Mon Feb 22 22:51:21 CET
> 2010</a>
> <a href="deployment.png">deployment.png Mon Feb 22 23:00:34 CET 2010</a>
> <a href="Monitoring+strategy.odt">Monitoring strategy.odt Fri Aug 01
> 13:38:04 CEST 2014</a>
> </pre></body></html>
> ParseData::
> Version: 5
> Status: success(1,0)
> Title: Index of /Documents/Hiran/Monitoring/
> Outlinks: 5
> outlink: toUrl:
> smb://hi...@nas.fritz.box/Documents/Hiran/Monitoring/architektur.dia anchor:
> architektur.dia Mon Feb 22 21:30:33 CET 2010
> outlink: toUrl:
> smb://nas.fritz.box/Documents/Hiran/Monitoring/architektur.dia~ anchor:
> architektur.dia~ Mon Feb 22 21:20:42 CET 2010
> outlink: toUrl:
> smb://hi...@nas.fritz.box/Documents/Hiran/Monitoring/deployment.dia anchor:
> deployment.dia Mon Feb 22 22:56:15 CET 2010
> outlink: toUrl:
> smb://nas.fritz.box/Documents/Hiran/Monitoring/deployment.dia~ anchor:
> deployment.dia~ Mon Feb 22 22:51:21 CET 2010
> outlink: toUrl:
> smb://hi...@nas.fritz.box/Documents/Hiran/Monitoring/Monitoring+strategy.odt
> anchor: Monitoring strategy.odt Fri Aug 01 13:38:04 CEST 2014
> Content Metadata:
> nutch.segment.name = 20241029225708
> nutch.content.digest = a794c6675cb2f9e460e7771060ed2dfc
> _fst_ = 33
> nutch.crawl.score = 1.0
> Parse Metadata:
> CharEncodingForConversion = windows-1252
> OriginalCharEncoding = windows-1252
> language = en
> CrawlDatum::
> Version: 7
> Status: 65 (signature)
> Fetch time: Tue Oct 29 22:57:25 CET 2024
> Modified time: Thu Jan 01 01:00:00 CET 1970
> Retries since fetch: 0
> Retry interval: 0 seconds (0 days)
> Score: 0.0
> Signature: a794c6675cb2f9e460e7771060ed2dfc
> Metadata:
>
> CrawlDatum::
> Version: 7
> Status: 33 (fetch_success)
> Fetch time: Tue Oct 29 22:57:17 CET 2024
> Modified time: Thu Jan 01 01:00:00 CET 1970
> Retries since fetch: 0
> Retry interval: 86400 seconds (1 days)
> Score: 1.0
> Signature: null
> Metadata:
> _ngt_=1730239026566
> _pst_=success(1), lastModified=0
> Content-Type=text/html
> ParseText::
> Index of /Documents/Hiran/Monitoring/
> Index of /Documents/Hiran/Monitoring/
> .svn/ Tue Oct 24 13:32:32 CEST 2017
> architektur.dia Mon Feb 22 21:30:33 CET 2010
> architektur.dia~ Mon Feb 22 21:20:42 CET 2010
> architektur.png Mon Feb 22 21:34:27 CET 2010
> deployment.dia Mon Feb 22 22:56:15 CET 2010
> deployment.dia~ Mon Feb 22 22:51:21 CET 2010
> deployment.png Mon Feb 22 23:00:34 CET 2010
> Monitoring strategy.odt Fri Aug 01 13:38:04 CEST 2014
> {code}
>
> Addendum: It is ok to have only 5 outlinks from a document with 8 anchors.
> The .svn and the two .png links are ignored. My regex-urlfilter.txt looks
> like this:
> {code:java}
> # skip file: ftp: and mailto: urls
> -^(?:file|ftp|mailto):
> # skip image and other suffixes we can't yet parse
> # for a more extensive coverage use the urlfilter-suffix plugin
> -(?i)\.(?:gif|jpg|png|ico|css|sit|eps|wmf|zip|ppt|mpg|xls|gz|rpm|tgz|mov|exe|jpeg|bmp|js)$
> # skip URLs containing certain characters as probable queries, etc.
> -[?*!=]
> # skip URLs with slash-delimited segment that repeats 3+ times, to break loops
> -.*(/[^/]+)/[^/]+\1/[^/]+\1/
> # skip version control internal files
> -(?i)\.(?:git|svn|cvs)$
> # skip recycle bin URLs
> -(?i)/%23recycle/$
> -/\.svn/
> -/\.git/
> # accept anything else
> +.
> {code}
>
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