fix #74

Author: changsanjiang

SJMediaCacheServer.podspec

@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'SJMediaCacheServer'
-  s.version          = '2.0.3'
+  s.version          = '2.0.4'
   s.summary          = <<-DESC
   SJMediaCacheServer 是一个高效的 HTTP 媒体缓存框架，旨在代理媒体数据请求并优先提供缓存数据，从而减少网络流量并增强播放的流畅性。该框架支持两种类型的远程资源：基于文件的媒体，如 MP3、AAC、WAV、FLAC、OGG、MP4 和 MOV 等常见格式，以及 HLS（HTTP Live Streaming）流。它会自动解析 HLS 播放列表并代理各个媒体片段。
   DESC

SJMediaCacheServer/Core/Asset/FILE/FILEAsset.m

@@ -160,6 +160,9 @@ - (float)completeness {
             NSString *pathExtension = response.pathExtension;
             NSUInteger totalLength = response.totalLength;
             NSUInteger offset = response.range.location;
+            
+            if ( totalLength == NSUIntegerMax ) return nil;
+            
             if ( !mMetadataReady ) {
                 mMetadataReady = YES;
                 _totalLength = totalLength;

SJMediaCacheServer/Core/Asset/HLS/HLSAsset.m

@@ -408,6 +408,8 @@ - (BOOL)isStored {
         case MCSDataTypeFILEMask:
         case MCSDataTypeFILE: return nil; /* return nil; */
         case MCSDataTypeHLSSegment: { // only segment
+            if ( response.totalLength == NSUIntegerMax ) return nil;
+            
             @synchronized (self) {
                 id<HLSAssetSegment>content = nil;
                 NSString *segmentIdentifier = [self generateSegmentIdentifierWithOriginalURL:response.originalRequest.URL];

SJMediaCacheServer/Core/Common/MCSInterfaces.h

@@ -40,7 +40,7 @@ NS_ASSUME_NONNULL_BEGIN
 #pragma mark -
 
 @protocol MCSResponse <NSObject>
-@property (nonatomic, readonly) NSUInteger totalLength;
+@property (nonatomic, readonly) NSUInteger totalLength; // 200请求时, NSUIntegerMax表示服务器未提供content-length;
 @property (nonatomic, readonly) NSRange range; // 206请求时length不为0
 @property (nonatomic, copy, readonly) NSString *contentType; // default is "application/octet-stream"
 @end

SJMediaCacheServer/Core/Download/MCSDownload.m

@@ -12,6 +12,7 @@
 #import "MCSUtils.h"
 #import "MCSLogger.h"
 #import "NSURLRequest+MCS.h"
+#import "MCSConsts.h"
 
 @interface NSURLSessionTask (MCSDownloadExtended)<MCSDownloadTask>
 
@@ -58,15 +59,26 @@ - (instancetype)init {
         mDefaultResponseHandler = ^id<MCSDownloadResponse> _Nullable (NSURLSessionTask *task, NSURLResponse *response) {
             if ( ![response isKindOfClass:NSHTTPURLResponse.class] ) return nil;
             NSHTTPURLResponse *res = (NSHTTPURLResponse *)response;
-            MCSResponseContentRange contentRange = MCSResponseGetContentRange(res);
-            if ( MCSResponseRangeIsUndefined(contentRange) ) return nil;
-            NSRange range = MCSResponseRange(contentRange);
-            NSUInteger totalLength = contentRange.totalLength;
-
             NSInteger statusCode = res.statusCode;
             NSString *_Nullable contentType = MCSResponseGetContentType(res);
             NSString *_Nullable pathExtension = MCSSuggestedPathExtension(res);
-            return [MCSDownloadResponse.alloc initWithOriginalRequest:task.originalRequest currentRequest:task.currentRequest statusCode:statusCode pathExtension:pathExtension totalLength:totalLength range:range contentType:contentType];
+            switch (statusCode) {
+                case 206: {
+                    MCSResponseContentRange contentRange = MCSResponseGetContentRange(res);
+                    if ( MCSResponseRangeIsUndefined(contentRange) ) return nil;
+                    NSRange range = MCSResponseRange(contentRange);
+                    NSUInteger totalLength = contentRange.totalLength;
+                    return [MCSDownloadResponse.alloc initWithOriginalRequest:task.originalRequest currentRequest:task.currentRequest statusCode:statusCode pathExtension:pathExtension totalLength:totalLength range:range contentType:contentType];
+                }
+                    break;
+                case 200: {
+                    NSUInteger totalLength = MCSResponseGetContentLength(res) ?: NSUIntegerMax;
+                    NSRange range = NSMakeRange(0, totalLength);
+                    return [MCSDownloadResponse.alloc initWithOriginalRequest:task.originalRequest currentRequest:task.currentRequest statusCode:statusCode pathExtension:pathExtension totalLength:totalLength range:range contentType:contentType];
+                }
+                    break;
+                default: return nil;
+            }
         };
         _responseHandler = mDefaultResponseHandler;
     }