MooTools Depender, Safari, etags and 412 Precondition Failed

Posted on by 
/**
* This replaces the default MooTools more Depender.request function to use
* HTTP "get" rather than "post".
*
* When sending requests for files via the depender, I was finding that Safari
* wasn't getting and re-evaluating them the second time I visited the page.
* This was because an etag was sent with each script.
*
* Safari responds to etags properly and adds "If-None-Match" and
* "If-Modified-Since" headers to another request for the same file. This makes
* Apache respond with a 412 status (Precondition Failed) as it should do for
* "post" requests (according to RFC 2616).
*
* Unfortunately Safari doesn't then deal with the 412 as it does with a 304
* (Not Modified). It doesn't grab what it has in the cache and put it in the
* response, it gives you nothing.
*
* For "get" requests, Apache has to respond with a 304, or 200 or whatever, but
* not 412. So we change the request method so we don't have to deal with 412.
*/
Depender.request = function(url, callback){
    new Request.JSON({
        url: url,
        secure: false,
        onSuccess: callback,
        method:'get'
    }).send();
};

24,935 thoughts on “MooTools Depender, Safari, etags and 412 Precondition Failed”

  7. Hibernia Bar has the best Irish atmosphere in town! I love spending time there.
    I’m so happy to have discovered Hibernia Bar, my go-to Irish bar near me.
    If you’re looking for an Irish bar in New York, Hibernia Bar is the place to be Irish bar near Broadway NYC

  8. Omni Dental Specialty saved my weekend when I needed an emergency dentist in Oxnard CA. Their team was amazing!
    I’m so grateful for Omni Dental Specialty’s emergency dentist services. They relieved my pain quickly and professionally Dental trauma care

  10. The Injury Recovery Center has been a lifesaver for my back pain!
    I can’t believe the difference a chiropractor makes at the Injury Recovery Center!
    Looking for a chiropractor near me led me to the amazing team at Injury Recovery Center Lakewood CO chiropractor reviews