v0.5.2

-  check HTTP status code of NSURLConnection responses during xhr polling transport. close #160

SocketIOTransportXHR.m

@@ -171,6 +171,27 @@ - (void) poll:(NSString *)data retryNumber:(int)retry
 
 - (void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
 {
+    // check for server status code (http://gigliwood.com/weblog/Cocoa/Q__When_is_an_conne.html)
+    if ([response respondsToSelector:@selector(statusCode)]) {
+        NSInteger statusCode = [((NSHTTPURLResponse *)response) statusCode];
+        DEBUGLOG(@"didReceiveResponse() %i", statusCode);
+
+        if (statusCode >= 400) {
+            // stop connecting; no more delegate messages
+            [connection cancel];
+
+            NSString *error = [NSString stringWithFormat:NSLocalizedString(@"Server returned status code %d", @""), statusCode];
+            NSDictionary *errorInfo = [NSDictionary dictionaryWithObject:error forKey:NSLocalizedDescriptionKey];
+            NSError *statusError = [NSError errorWithDomain:SocketIOError
+                                                       code:statusCode
+                                                   userInfo:errorInfo];
+
+            if ([delegate respondsToSelector:@selector(onError:)]) {
+                [delegate onError:statusError];
+            }
+        }
+    }
+
     [_data setLength:0];
 }
 
@@ -206,15 +227,13 @@ - (void) connection:(NSURLConnection *)connection didFailWithError:(NSError *)er
     }
 }
 
-// Sometimes Socket.IO "batches" up messages in one packet,
-// so we have to split them.
-//
+// Sometimes Socket.IO "batches" up messages in one packet, so we have to split them.
 - (NSArray *)packetsFromPayload:(NSString *)payload
 {
     // "Batched" format is:
     // �[packet_0 length]�[packet_0]�[packet_1 length]�[packet_1]�[packet_n length]�[packet_n]
 
-    if([payload hasPrefix:@"\ufffd"]) {
+    if ([payload hasPrefix:@"\ufffd"]) {
         // Payload has multiple packets, split based on the '�' character
         // Skip the first character, then split
         NSArray *split = [[payload substringFromIndex:1] componentsSeparatedByString:@"\ufffd"];
@@ -224,14 +243,15 @@ - (NSArray *)packetsFromPayload:(NSString *)payload
 
         // Now all of the odd-numbered indices are the packets (1, 3, 5, etc.)
         [split enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
-            if(idx % 2 != 0) {
+            if (idx % 2 != 0) {
                 [packets addObject:obj];
             }
         }];
 
         NSLog(@"Parsed a payload!");
         return packets;
-    } else {
+    }
+    else {
         // Regular single-packet payload
         return @[payload];
     }