[Tcl-bugs] [Tcl Source Code] New ticket [c11a51c482ba5720793d44340f76934c59718780|c11a51c482] Configuration race condition in accept types.

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Ticket Change [8179f124fb728b3dbbc67c7dfbf8af876730787e]
  [New ticket [c11a51c482ba5720793d44340f76934c59718780|c11a51c482] Configuration race condition in accept types.]
  By      dkf
  For     Tcl Source Code
  On      2014-07-06T17:13:33.182
  Details http://core.tcl.tk/tcl/tinfo?name=8179f124fb728b3dbbc67c7dfbf8af876730787e
  Ticket  http://core.tcl.tk/tcl/tktview/c11a51c482ba5720793d44340f76934c59718780

Changed Fields
  assignee:   nobody
  closer:     nobody
  comment:    If you're using the http package to do REST with content type
              negotiation, you need to configure the package's <tt>Accept:</tt>
              types mechanism from time to time. This is a bit of a broken API, in
              that there's no option to override from options passed to
              <tt>http::geturl</tt>. This is not the feature change I'm requesting.
              <p>  <i>However,</i> if you're also using asynchronous connecting then
              you've got an additional problem in that the configuration of the
              <tt>-accept</tt> option is only read when the connection is made; two
              connections that require different <tt>Accept:</tt> headers will have
              a race condition between the two, and so which is used will be pretty
              much random. <b>This Is Wrong.</b> This is the bug I'm reporting.  <p>
              Suggested fix, <i>without fixing the original API botch,</i> is to
              take a copy of <tt>$http(-accept)</tt> into the <tt>state</tt> array
              during <tt>http::geturl</tt> so that the value used in
              <tt>http::Connected</tt> is predictable.  <p>  See also: <a
              href="http://www.kroc.tk/forum/index.php?t=msg&th=1041&goto=5213&#msg_5
              213">this thread</a> with the comment that prompted me to look into
              the potential feature request, and discover the race:
              <blockquote><tt><i>Ok well the final solution was that using -headers
              in the http::geturl doesn't seem to work when setting an "Accept"
              header - which kind of sucks…</i></tt></blockquote>
  foundin:    http 2.8.8
  is_private: 0
  login:      dkf
  priority:   5 Medium
  resolution: None
  severity:   Minor
  status:     Open
  submitter:  dkf
  subsystem:  29. http Package
  title:      Configuration race condition in accept types
  type:       Bug

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