I am trying to make a separate http call inside startLoading() before submitting the original request. Code is like below :
+canInitWithRequest(){
if(self.request.valueForKey("handledKey") != nil){
return false;
}
return true;
}
-startLoading(){
__block NSString * realURLString = self.request.URL.absoluteString;
//send separate http call for validation
NSMutableURLRequest validationRequest = [NSMutableURLRequest initWithURL:[URL initWithString:OUR_VALIDATION_SERVER_URL]];
{code to fill info into validationRequest, etc.}
semaphore = dispatch_semaphore_create(0); // need to sync to make sure we use the expected/real url
[NSURLProtocol setValue:YES forkey:"handledKey" inRequest: validationRequest];
[NSURLSession sendAsyncRequest:validationRequest ...completionHandler(response, data, error){
realURLString = xxxx;
print(current thread info);// line 1
dispatch_semaphore_signal(sema);
}];
print(current thread info);// line 2
dispatch_semaphore_wait(sema);
//continue original request with real url
NSMutableURLRequest realRequest = NSMutableURLRequest(realURLString);
[NSURLProtocol setValue:YES forkey:"handledKey" inRequest: realRequest];
self.connection = [NSURLSession withRequst:realRequest delegate:self];
}
}
The VERY SAME code works if used in a webView for either normal contents (htm, css, etc.) [case 1] or m3u8/mpg [case 2] (a player will automatically embedded in the webView);
However if used with AVPlayer directly to play the same m3u8 [case 3], the validation call will stuck for ~1 minute (a request timeout if looking into the error ) after the canInitWithRequest() method. And subsequently renders the following request fail.
At first I thought it was thread issue. But line 1 and line 2 gave different threads.
I suspect AVPlayer used some mechanism different than webView to process http request. In [case 2], the webView just overrode AVPlayer probably. But not sure.
Can anybody give more insight?
Thanks!
