ios7 memory issue loading json file via angularjs (Ionic) httpPromise.then

Question

I have an odd issue. I an using angularjs (Ionic) to load an external json file via a httpPromise. All has been working correctly until yesterday when the remote files were moved to another host.

Now the problem is on an iphone4 running ios7 it tries to load the file but can't and crashes out with memory usage issues. inspecting it using xcode it quickly climbs to over 300mb and then crashes. does the same thing on two devices. runs fine on other phone emulators etc.

Now if I host the file on another server it works as expected.

the different response headers are:

the one that fails:

Accept-Ranges bytes Connection close Content-Length 721255 Content-Type application/json Date Thu, 11 Dec 2014 06:04:15 GMT Last-Modified Thu, 11 Dec 2014 05:12:57 GMT Server LiteSpeed Vary User-Agent

Working host:

Accept-Ranges bytes Connection keep-alive Content-Encoding gzip Content-Type application/json Date Thu, 11 Dec 2014 06:05:01 GMT Last-Modified Thu, 11 Dec 2014 03:29:48 GMT Server nginx/1.6.2 Transfer-Encoding chunked Vary Accept-Encoding,User-Agent

Code used to get json file.

        var deferred = $q.defer(),
            httpPromise = $http.get('http://someurl.com.au/deals.json');

        httpPromise.then(function success(response) {

so after all of that my question is why would the json file not load or return an error of some sort? But cause such a memory spike?

The only main difference I see between servers is the connection configuration. working uses Connection keep-alive and the one that fails is closed.

thoughts?

Additionally, I've just tried it on 3g and it works fine but via wireless it doesn't work?

Answer 1

i think you need to focus on the Content-Encoding gzip which is probably what is saving you from memory issues