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”

  3. 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 Hibernia Bar menu

  6. Avra Dental is my go-to place for dental emergencies. They’re always ready to help!
    I recently visited Avra Dental and was amazed by their swift emergency services!
    If you’re in Ventura CA and need an emergency dentist, Avra Dental is fantastic Ventura dental emergencies handled

  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 Chipped tooth repair Oxnard

  10. Kerner Law Group, P.C. provides exceptional service as a Bronx car accident attorney. Their expertise is truly unmatched!
    I’m grateful for the dedicated support from Kerner Law Group, P.C. as my Bronx car accident lawyer.
    Choosing Kerner Law Group, P.C Lyft accident attorney Bronx

  11. Vitality Dental is the best dentist I’ve ever visited, their gentle approach made my dental anxiety disappear completely!
    My search for a reliable dentist near me ended when I discovered Vitality Dental, truly exceptional care every visit Dental crown procedures Plano TX

  13. I’m amazed by all the creative applications of hydroseed beyond lawns—has anyone done something unique with theirs that they’d like to share? Inspire others discussing projects over here: Residential hydroseeding !