BIND 10 #2298: Xfrout/zones and XML stats

[BIND 10 Development]

#2298: Xfrout/zones  and XML stats
-------------------------------------+-------------------------------------
                   Reporter:  jreed  |                 Owner:  UnAssigned
                       Type:         |                Status:  reviewing
  defect                             |             Milestone:  Next-Sprint-
                   Priority:         |  Proposed
  medium                             |            Resolution:
                  Component:         |             Sensitive:  0
  statistics                         |           Sub-Project:  Core
                   Keywords:         |  Estimated Difficulty:  5
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Changes (by naokikambe):

 * owner:   => UnAssigned
 * status:  new => reviewing


Comment:

 The branch is ready for reviewing.
 I've slightly changed an xml format from the above proposed one. Item data
 of statistics are included in xml attributes, not in xml elements. This is
 intended for reducing the amount of xml data. I've introduced xml
 validation check by using the lxml module into the unittest, which is a
 third-party python module. However that check will be skipped if the
 module is unavailable on the system. I've also included a fix for #2048
 (configure check for pyexpat) in the branch.
 A proposed !ChangeLog entry is:
 {{{
 nnn.    [bug]*          naokikambe
         Fixed an XML format viewed from b10-stats-httpd. Regarding per-
 zone
         counters as zones of Xfrout, a part of the item values wasn't an
 exact
         XML format. A zone name can be specified in URI as
         /bind10/statistics/xml/Xfrout/zones/example.org/xfrreqdone. XSD
 and XSL
         formats are also changed to constant ones due to these changes.
         (Trac #2298, git tbd)
 }}}

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Ticket URL: <http://bind10.isc.org/ticket/2298#comment:4>
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