Support application/json in dojo.io transports

[guest]

According to the ​draft RFC, the preferred mime type for JSON is "application/json", but all of the transports in dojo.io only accept "text/json".

As a kind of aside, it took me a while to dig up this issue. I now understand that what I should do is inspect the request object returned by dojo.io.bind for its "bindSuccess" value, but that idiom isn't easy to find in dojo docs. (It doesn't show up at all in the "baking usability" document.) If nothing else, perhaps it would help to add a dojo.debug("No transports can handle your request") in io.js before returning.

[dylan]

alex, any preference on what to do with this one?

[James Burke]

(In [6181]) Fixes #1011, support application/json. Also fixed IframeIO.js canHandle: the stricter checking I did in dojo.io.bind() caused IframeTransport? binds to fail unless they had a file upload field. Since we are going to allow using url: with IframeTransport? (references #1170) I removed the file input requirement for IframeTransport?.

[(none)]

Milestone 0.4 deleted