Matthew Reiter created SHINDIG-1808:
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Summary: makeRequest fails on IE when ActiveX is disabled
Key: SHINDIG-1808
URL: https://issues.apache.org/jira/browse/SHINDIG-1808
Project: Shindig
Issue Type: Bug
Components: Javascript
Affects Versions: 2.0.0
Environment: Internet Explorer 7+
Reporter: Matthew Reiter
Priority: Minor
When using Internet Explorer and ActiveX is disabled, makeRequest throws an
exception creating the Msxml2.XMLHTTP ActiveXObject rather than falling back to
XMLHttpRequest. This bug was introduced as part of the fix for the bug "IE7 XHR
requests fail when gadgets contain a <base href="..."> tag"
(https://issues.apache.org/jira/browse/SHINDIG-1194) because the order in which
the two methods are attempted was reversed. The Wicket project encountered the
same bug: "Problems concerning IE9 with "ActiveX Filtering" enabled"
(https://issues.apache.org/jira/browse/WICKET-3887), but Shindig may not be
able to make use of their fix due to the issues raised in the first bug. Thus
my proposed solution is to wrap the ActiveXObject creation in a try-catch block
and fall back to XMLHttpRequest if an error is encountered.
Once that is out of the way, the same error will occur again later when
attempting to parse the DOM (assuming that XML was returned) when creating
Microsoft.XMLDOM because it doesn't fall back to DOMParser. For this, I propose
reversing the order in which the two methods are attempted (try DOMParser first
and then try Microsoft.XMLDOM if it fails) under the assumption that using
DOMParser is the preferred method of parsing XML.
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