[patch] XHR over file:// fails for IE >=9

[vita]

Split from #17015.

Because IE 9 and upper supports addEventListener xhr for the ​file:// protocol failed. See attached patch.

[bill]

patch from vita

[Bryan Forbes]

First of all, is this needed? Developers should not be using the file protocol on newer browsers because of the restrictions put on XMLHttpRequest in those browsers. In fact, according to Rawld's comments on #17015, the file protocol doesn't work in IE9. Second, the addition of a browser sniff is completely unneeded: the first use is basically a duplicate of the has('activex') check, and the second change should be using dojo-force-activex-xhr test instead of using a sniff. Third, please submit patches in unified diff format (svn diff and git diff should output unified diff by default). I'm keeping this open for now, but will most likely close this as wontfix because developers should not be using the file protocol in newer browsers even though it was supported in older browsers. I will also close this as wontfix if #17015 is true and the file protocol will not work at all in IE9.

[pykaso]

Our JS client is using both .. http and file protocol. It can run in offline mode. Why we should not be using the file protocol? Are we evil?

[vita]

File protocol work in IE9 and above. Here are two patches and testing file, which demonstrate the functionality. I remove double sniffing of IE to. Sources base is version 1.9.0RC2.

[vita]

dojo.js patch IE9 ​file:// support

[vita]

xhr.js patch IE9 ​file:// support

[vita]

testing example

[dylan]

Fixed in master ( ​https://github.com/dojo/dojo/commit/e13a7758ec051db56150886e03ef9ba9b655a0ed ), backported to 1.10 ( ​https://github.com/dojo/dojo/commit/8ce1fd06bf065f3c439234f0c687f03b639589c6 ), 1.9 ( ​https://github.com/dojo/dojo/commit/8cf26f5da035c373124d0b4c0bc1656d77c68686 ), and 1.8 ( ​https://github.com/dojo/dojo/commit/890a02eeaa0aafd9b3adfce00a3810fbc213a39c ).

Sorry this took 3 years, better late than never...