fixing issue #76: logging network errors properly

AUTHORS

@@ -8,4 +8,5 @@ Arthur Darcet- https://github.com/arthurdarcet
 lesterkp - https://github.com/lesterkp
 Christoph Lupprich - https://github.com/clupprich
 Dmitry Vorobyov - https://github.com/dvor
-Mark Anderson - https://github.com/manderson-productions
+Mark Anderson - https://github.com/manderson-productions
+Marc Doering - https://github.com/triskybro

Raven/RavenClient.m

@@ -141,7 +141,7 @@ - (instancetype)initWithDSN:(NSString *)DSN extra:(NSDictionary *)extra tags:(NS
 
         // Parse DSN
         if (_config && ![_config setDSN:DSN]) {
-            NSLog(@"Invalid DSN %@!", DSN);
+            NSLog(@"Invalid DSN: %@", DSN);
             return nil;
         }
     }
@@ -431,12 +431,21 @@ - (void)sendJSON:(NSData *)JSON {
     [request setValue:header forHTTPHeaderField:@"X-Sentry-Auth"];
 
     [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue currentQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
-        if (data) {
-        	NSLog(@"JSON sent to Sentry");
-        } else {
-             NSLog(@"Connection failed! Error - %@ %@", [connectionError localizedDescription], [[connectionError userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]);
+        if (connectionError) {
+            if (data) {
+                NSString *dataString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
+                NSLog(@"Connection failed! Error - %@ %@ %@", [connectionError localizedDescription], [[connectionError userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey], dataString);
+            } else {
+                NSLog(@"Connection failed! Error - %@ %@", [connectionError localizedDescription], [[connectionError userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]);
+            }
+
+        } else if (response) {
+            NSLog(@"Response from Sentry: %@", response);
         }
     }];
+
+    NSLog(@"JSON sent to Sentry");
+
 }
 
 #pragma mark - JSON helpers