Merge pull request #132 from JessThrysoee/reachabilityWithURL

Add reachabilityWithURL

Reachability.h

@@ -75,6 +75,7 @@ typedef void (^NetworkReachability)(Reachability * reachability, SCNetworkConnec
 +(instancetype)reachabilityForInternetConnection;
 +(instancetype)reachabilityWithAddress:(void *)hostAddress;
 +(instancetype)reachabilityForLocalWiFi;
++(instancetype)reachabilityWithURL:(NSURL*)url;
 
 -(instancetype)initWithReachabilityRef:(SCNetworkReachabilityRef)ref;
 

Reachability.m

@@ -141,6 +141,39 @@ +(instancetype)reachabilityForLocalWiFi
     return [self reachabilityWithAddress:&localWifiAddress];
 }
 
++(instancetype)reachabilityWithURL:(NSURL*)url
+{
+    id reachability;
+
+    NSString *host = url.host;
+    BOOL isIpAddress = [self isIpAddress:host];
+
+    if (isIpAddress)
+    {
+        NSNumber *port = url.port ?: [url.scheme isEqualToString:@"https"] ? @(443) : @(80);
+
+        struct sockaddr_in address;
+        address.sin_len = sizeof(address);
+        address.sin_family = AF_INET;
+        address.sin_port = htons([port intValue]);
+        address.sin_addr.s_addr = inet_addr([host UTF8String]);
+
+        reachability = [self reachabilityWithAddress:&address];
+    }
+    else
+    {
+        reachability = [self reachabilityWithHostname:host];
+    }
+
+    return reachability;
+}
+
++(BOOL)isIpAddress:(NSString*)host
+{
+    struct in_addr pin;
+    return 1 == inet_aton([host UTF8String], &pin);
+}
+
 
 // Initialization methods