[jira] Created: (NUTCH-731) Redirection of robots.txt in RobotRulesParser

Redirection of robots.txt in RobotRulesParser
---------------------------------------------

                 Key: NUTCH-731
                 URL: https://issues.apache.org/jira/browse/NUTCH-731
             Project: Nutch
          Issue Type: Improvement
          Components: fetcher
    Affects Versions: 1.0.0
            Reporter: Julien Nioche


The patch attached allows to follow one level of redirection for robots.txt files. A similar issue was mentioned in NUTCH-124 and has been marked as fixed a long time ago but the problem remained, at least when using Fetcher2 . Mathijs Homminga pointed to the problem in a mail to the nutch-dev list in March.

I have been using this patch for a while now on a large cluster and noticed that the ratio of robots_denied per fetchlist went up, meaning that at least we are now getting restrictions we would not have had before (and getting less complaints from webmasters at the same time)

--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.

     [ https://issues.apache.org/jira/browse/NUTCH-731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Julien Nioche updated NUTCH-731:
--------------------------------

    Attachment: NUTCH-731.patch

> Redirection of robots.txt in RobotRulesParser
> ---------------------------------------------
>
>                 Key: NUTCH-731
>                 URL: https://issues.apache.org/jira/browse/NUTCH-731
>             Project: Nutch
>          Issue Type: Improvement
>          Components: fetcher
>    Affects Versions: 1.0.0
>            Reporter: Julien Nioche
>         Attachments: NUTCH-731.patch
>
>
> The patch attached allows to follow one level of redirection for robots.txt files. A similar issue was mentioned in NUTCH-124 and has been marked as fixed a long time ago but the problem remained, at least when using Fetcher2 . Mathijs Homminga pointed to the problem in a mail to the nutch-dev list in March.
> I have been using this patch for a while now on a large cluster and noticed that the ratio of robots_denied per fetchlist went up, meaning that at least we are now getting restrictions we would not have had before (and getting less complaints from webmasters at the same time)

--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.

    [ https://issues.apache.org/jira/browse/NUTCH-731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12712489#action_12712489 ]

Otis Gospodnetic commented on NUTCH-731:
----------------------------------------

People have redirects on their robots.txt?  Wow.  Do you have an example of that handy, by any chance?

> Redirection of robots.txt in RobotRulesParser
> ---------------------------------------------
>
>                 Key: NUTCH-731
>                 URL: https://issues.apache.org/jira/browse/NUTCH-731
>             Project: Nutch
>          Issue Type: Improvement
>          Components: fetcher
>    Affects Versions: 1.0.0
>            Reporter: Julien Nioche
>         Attachments: NUTCH-731.patch
>
>
> The patch attached allows to follow one level of redirection for robots.txt files. A similar issue was mentioned in NUTCH-124 and has been marked as fixed a long time ago but the problem remained, at least when using Fetcher2 . Mathijs Homminga pointed to the problem in a mail to the nutch-dev list in March.
> I have been using this patch for a while now on a large cluster and noticed that the ratio of robots_denied per fetchlist went up, meaning that at least we are now getting restrictions we would not have had before (and getting less complaints from webmasters at the same time)

--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.

    [ https://issues.apache.org/jira/browse/NUTCH-731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12712907#action_12712907 ]

Julien Nioche commented on NUTCH-731:
-------------------------------------

I don't have a specific example now, in all the cases I have seen the redirections were between two variants of a hostname with and without www.

> Redirection of robots.txt in RobotRulesParser
> ---------------------------------------------
>
>                 Key: NUTCH-731
>                 URL: https://issues.apache.org/jira/browse/NUTCH-731
>             Project: Nutch
>          Issue Type: Improvement
>          Components: fetcher
>    Affects Versions: 1.0.0
>            Reporter: Julien Nioche
>         Attachments: NUTCH-731.patch
>
>
> The patch attached allows to follow one level of redirection for robots.txt files. A similar issue was mentioned in NUTCH-124 and has been marked as fixed a long time ago but the problem remained, at least when using Fetcher2 . Mathijs Homminga pointed to the problem in a mail to the nutch-dev list in March.
> I have been using this patch for a while now on a large cluster and noticed that the ratio of robots_denied per fetchlist went up, meaning that at least we are now getting restrictions we would not have had before (and getting less complaints from webmasters at the same time)

--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.

    [ https://issues.apache.org/jira/browse/NUTCH-731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12722214#action_12722214 ]

Julien Nioche commented on NUTCH-731:
-------------------------------------

Here is an example which the patch helps addressing

curl http://wizardhq.com/robots.txt

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>301 Moved Permanently</title>
</head><body>
<h1>Moved Permanently</h1>
<p>The document has moved <a href="http://www.wizardhq.com/robots.txt">here</a>.</p>
</body></html>

again, the ratio of robots_denied status started going up after I wrote the patch which means that such cases are not so rare

> Redirection of robots.txt in RobotRulesParser
> ---------------------------------------------
>
>                 Key: NUTCH-731
>                 URL: https://issues.apache.org/jira/browse/NUTCH-731
>             Project: Nutch
>          Issue Type: Improvement
>          Components: fetcher
>    Affects Versions: 1.0.0
>            Reporter: Julien Nioche
>         Attachments: NUTCH-731.patch
>
>
> The patch attached allows to follow one level of redirection for robots.txt files. A similar issue was mentioned in NUTCH-124 and has been marked as fixed a long time ago but the problem remained, at least when using Fetcher2 . Mathijs Homminga pointed to the problem in a mail to the nutch-dev list in March.
> I have been using this patch for a while now on a large cluster and noticed that the ratio of robots_denied per fetchlist went up, meaning that at least we are now getting restrictions we would not have had before (and getting less complaints from webmasters at the same time)

--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.

    [ https://issues.apache.org/jira/browse/NUTCH-731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12722242#action_12722242 ]

Ken Krugler commented on NUTCH-731:
-----------------------------------

This is definitely an issue - I've been pinging various domains while testing robots.txt handling in bixo, and many of them will do a redirect if you use http://<domain>/robots.txt, to http://www.<domain>/robots.txt.

> Redirection of robots.txt in RobotRulesParser
> ---------------------------------------------
>
>                 Key: NUTCH-731
>                 URL: https://issues.apache.org/jira/browse/NUTCH-731
>             Project: Nutch
>          Issue Type: Improvement
>          Components: fetcher
>    Affects Versions: 1.0.0
>            Reporter: Julien Nioche
>         Attachments: NUTCH-731.patch
>
>
> The patch attached allows to follow one level of redirection for robots.txt files. A similar issue was mentioned in NUTCH-124 and has been marked as fixed a long time ago but the problem remained, at least when using Fetcher2 . Mathijs Homminga pointed to the problem in a mail to the nutch-dev list in March.
> I have been using this patch for a while now on a large cluster and noticed that the ratio of robots_denied per fetchlist went up, meaning that at least we are now getting restrictions we would not have had before (and getting less complaints from webmasters at the same time)

--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.

     [ https://issues.apache.org/jira/browse/NUTCH-731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Otis Gospodnetic updated NUTCH-731:
-----------------------------------

    Fix Version/s: 1.1
         Assignee: Otis Gospodnetic

> Redirection of robots.txt in RobotRulesParser
> ---------------------------------------------
>
>                 Key: NUTCH-731
>                 URL: https://issues.apache.org/jira/browse/NUTCH-731
>             Project: Nutch
>          Issue Type: Improvement
>          Components: fetcher
>    Affects Versions: 1.0.0
>            Reporter: Julien Nioche
>            Assignee: Otis Gospodnetic
>             Fix For: 1.1
>
>         Attachments: NUTCH-731.patch
>
>
> The patch attached allows to follow one level of redirection for robots.txt files. A similar issue was mentioned in NUTCH-124 and has been marked as fixed a long time ago but the problem remained, at least when using Fetcher2 . Mathijs Homminga pointed to the problem in a mail to the nutch-dev list in March.
> I have been using this patch for a while now on a large cluster and noticed that the ratio of robots_denied per fetchlist went up, meaning that at least we are now getting restrictions we would not have had before (and getting less complaints from webmasters at the same time)

--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.

     [ https://issues.apache.org/jira/browse/NUTCH-731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrzej Bialecki  closed NUTCH-731.
-----------------------------------

    Resolution: Fixed
      Assignee: Andrzej Bialecki   (was: Otis Gospodnetic)

> Redirection of robots.txt in RobotRulesParser
> ---------------------------------------------
>
>                 Key: NUTCH-731
>                 URL: https://issues.apache.org/jira/browse/NUTCH-731
>             Project: Nutch
>          Issue Type: Improvement
>          Components: fetcher
>    Affects Versions: 1.0.0
>            Reporter: Julien Nioche
>            Assignee: Andrzej Bialecki
>             Fix For: 1.1
>
>         Attachments: NUTCH-731.patch
>
>
> The patch attached allows to follow one level of redirection for robots.txt files. A similar issue was mentioned in NUTCH-124 and has been marked as fixed a long time ago but the problem remained, at least when using Fetcher2 . Mathijs Homminga pointed to the problem in a mail to the nutch-dev list in March.
> I have been using this patch for a while now on a large cluster and noticed that the ratio of robots_denied per fetchlist went up, meaning that at least we are now getting restrictions we would not have had before (and getting less complaints from webmasters at the same time)

--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.

    [ https://issues.apache.org/jira/browse/NUTCH-731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12764009#action_12764009 ]

Andrzej Bialecki  commented on NUTCH-731:
-----------------------------------------

Fixed in rev. 823540 - I applied a slightly modified version of the patch, to account for common errors in redirects. Thank you!

> Redirection of robots.txt in RobotRulesParser
> ---------------------------------------------
>
>                 Key: NUTCH-731
>                 URL: https://issues.apache.org/jira/browse/NUTCH-731
>             Project: Nutch
>          Issue Type: Improvement
>          Components: fetcher
>    Affects Versions: 1.0.0
>            Reporter: Julien Nioche
>            Assignee: Andrzej Bialecki
>             Fix For: 1.1
>
>         Attachments: NUTCH-731.patch
>
>
> The patch attached allows to follow one level of redirection for robots.txt files. A similar issue was mentioned in NUTCH-124 and has been marked as fixed a long time ago but the problem remained, at least when using Fetcher2 . Mathijs Homminga pointed to the problem in a mail to the nutch-dev list in March.
> I have been using this patch for a while now on a large cluster and noticed that the ratio of robots_denied per fetchlist went up, meaning that at least we are now getting restrictions we would not have had before (and getting less complaints from webmasters at the same time)

--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.

    [ https://issues.apache.org/jira/browse/NUTCH-731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12764298#action_12764298 ]

Hudson commented on NUTCH-731:
------------------------------

Integrated in Nutch-trunk #959 (See [http://hudson.zones.apache.org/hudson/job/Nutch-trunk/959/])
     Redirection of robots.txt in RobotRulesParser.

> Redirection of robots.txt in RobotRulesParser
> ---------------------------------------------
>
>                 Key: NUTCH-731
>                 URL: https://issues.apache.org/jira/browse/NUTCH-731
>             Project: Nutch
>          Issue Type: Improvement
>          Components: fetcher
>    Affects Versions: 1.0.0
>            Reporter: Julien Nioche
>            Assignee: Andrzej Bialecki
>             Fix For: 1.1
>
>         Attachments: NUTCH-731.patch
>
>
> The patch attached allows to follow one level of redirection for robots.txt files. A similar issue was mentioned in NUTCH-124 and has been marked as fixed a long time ago but the problem remained, at least when using Fetcher2 . Mathijs Homminga pointed to the problem in a mail to the nutch-dev list in March.
> I have been using this patch for a while now on a large cluster and noticed that the ratio of robots_denied per fetchlist went up, meaning that at least we are now getting restrictions we would not have had before (and getting less complaints from webmasters at the same time)

--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.