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LatencyDetection.m
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LatencyDetection.m
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//
// LatencyDetection.m
// OutSystems
//
// Created by Vitor Oliveira on 03/11/15.
//
//
#import "LatencyDetection.h"
@interface LatencyDetection(){
NSDate* _dateReference;
}
@property(nonatomic, strong) void(^resultCallback)(NSString* latency);
@end
@implementation LatencyDetection
+(void)pingHostname:(NSString*)hostName andResultCallback:(void(^)(NSString* latency))result
{
static LatencyDetection* latencyDetection = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
latencyDetection = [[LatencyDetection alloc] init];
});
//ping hostname
[latencyDetection pingHostname:hostName andResultCallBlock:result];
}
-(void)pingHostname:(NSString*)hostName andResultCallBlock:(void(^)(NSString* latency))result
{
_resultCallback = result;
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"https://%@/servicecenter/_ping.html", hostName]];
NSURLRequest *request = [NSURLRequest requestWithURL:url
cachePolicy:NSURLRequestReloadIgnoringCacheData
timeoutInterval:60.0];
_dateReference = [NSDate date];
[NSURLConnection connectionWithRequest:request delegate:self];
}
#pragma mark - NSURLConnection Delegate
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
NSDate *end=[NSDate date];
double latency = [end timeIntervalSinceDate:_dateReference] * 1000;//get in miliseconds
_resultCallback([NSString stringWithFormat:@"%.f", latency]);
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
_resultCallback(nil);
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
}
@end