[OpenLayers-Trac] [OpenLayers] #3347: XMLHttpRequest send without open throws exception.

[OpenLayers]

#3347: XMLHttpRequest send without open throws exception.
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 Reporter:  dzwarg   |       Owner:  tschaub     
     Type:  bug      |      Status:  new         
 Priority:  minor    |   Milestone:  2.10 Release
Component:  Request  |     Version:  2.10        
 Keywords:           |       State:              
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 If an XMLHttpRequest is created, and the send() method is invoked without
 first calling open(), an exception is thrown. While this doesn't cause any
 errors, since it appears as though the XMLHttpRequest does call this code
 again after opening the connection, it does cause headaches in IE, where a
 dialog appears asking if the user would like to debug the script.  That's
 annoying.

 In IE, the exception thrown is an "Unspecified Error."

 In FF, the exception thrown is an "Component returned failure code:
 0xc1f30001 (NS_ERROR_NOT_INITIALIZED) [nsIXMLHttpRequest.send]"

 While my usual debugging approach would be tell a user "Don't DO that," I
 thought it would be helpful to pitch this back to the library when we
 started seeing strategy load() calls throwing this exception.  It was
 terribly difficult to track where the strategy was performing this
 sequence, but extremely easy to reproduce in XMLHttpRequest.

 Attached is a test and bugfix patch against 2.10 release. I checked trunk,
 but this code is heavily changed in trunk.  In case anyone else needs this
 patch, enjoy.

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Ticket URL: <http://trac.openlayers.org/ticket/3347>
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