Added -hasByteRange API

CGDWebServer/GCDWebServerFileResponse.m

@@ -81,7 +81,7 @@ static inline NSError* _MakePosixError(int code) {
     ARC_RELEASE(self);
     return nil;
   }
-  if ((range.location != NSNotFound) || (range.length > 0)) {
+  if (GCDWebServerIsValidByteRange(range)) {
     if (range.location != NSNotFound) {
       range.location = MIN(range.location, (NSUInteger)info.st_size);
       range.length = MIN(range.length, (NSUInteger)info.st_size - range.location);

CGDWebServer/GCDWebServerPrivate.h

@@ -103,6 +103,10 @@ extern void GCDLogMessage(long level, NSString* format, ...) NS_FORMAT_FUNCTION(
 #define kGCDWebServerGCDQueue dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
 #define kGCDWebServerErrorDomain @"GCDWebServerErrorDomain"
 
+static inline BOOL GCDWebServerIsValidByteRange(NSRange range) {
+  return ((range.location != NSNotFound) || (range.length > 0));
+}
+
 extern NSString* GCDWebServerExtractHeaderParameter(NSString* header, NSString* attribute);
 extern NSStringEncoding GCDWebServerStringEncodingFromCharset(NSString* charset);
 

CGDWebServer/GCDWebServerRequest.h

@@ -44,4 +44,5 @@
 @property(nonatomic, readonly) NSRange byteRange;  // Automatically parsed from headers ([NSNotFound, 0] if request has no "Range" header, [offset, length] for byte range from beginning or [NSNotFound, -bytes] from end)
 - (id)initWithMethod:(NSString*)method url:(NSURL*)url headers:(NSDictionary*)headers path:(NSString*)path query:(NSDictionary*)query;
 - (BOOL)hasBody;  // Convenience method
+- (BOOL)hasByteRange;  // Convenience method that checks "byteRange"
 @end

CGDWebServer/GCDWebServerRequest.m

@@ -237,6 +237,10 @@
   return _type ? YES : NO;
 }
 
+- (BOOL)hasByteRange {
+  return GCDWebServerIsValidByteRange(_range);
+}
+
 - (BOOL)open:(NSError**)error {
   return YES;
 }