Add correct Content-Type when ajax:beforeSend sets data.

[Confiscative]

This modification allows to unobtrusively add data to remote POST or PUT tags that aren't forms via the ajax:beforeSend event. Normally when data is provided the Content-Type is set internally by jQuery, but this happens before the beforeSend callback has been handled (line 6707, jQuery v1.5.1).

Example:

link_to("Flag", foo_path, :remote => true, :method => :put, :class => :do_foo)

$( function() {
    $(".do_foo").bind("ajax:beforeSend", function(event, xhr, settings) {
        settings.data = jquery.param({"foo[bar]": magic_value});
    });
});

[neerajsingh0101]

With this commit 5b23c3d now you have a before callback which is fired before the beforeSend is activated.

I think this might help you tackle your problem in a nicer way.

Do you still think this pull request should be merged?

[Confiscative]

The 'before'-fix you proposed seems like a better solution indeed. I'll close this one down then.

[jpalermo]

The ajax:before solution still only works if you have a form. If you are using a link to generate an ajax request and want to attach data to the request before it goes out, there is no clean way of doing it. If you do it in ajax:beforeSend, you then have to manually set the Content-Type header for the xhr request.