缓存策略增加“允许读取不完整的Partial Content”选项

internal/caches/storage_file.go

@@ -1004,6 +1004,11 @@ func (this *FileStorage) CanSendfile() bool {
 	return this.options.EnableSendfile
 }
 
+// Options 获取当前缓存存储的选项
+func (this *FileStorage) Options() *serverconfigs.HTTPFileCacheStorage {
+	return this.options
+}
+
 // 获取Key对应的文件路径
 func (this *FileStorage) keyPath(key string) (hash string, path string, diskIsFull bool) {
 	hash = stringutil.Md5(key)

internal/nodes/http_request_cache.go

@@ -722,6 +722,10 @@ func (this *HTTPRequest) tryPartialReader(storage caches.StorageInterface, key s
 		ranges[0][1] < 0 &&
 		!partialReader.IsCompleted() {
 		if partialReader.BodySize() > 0 {
+			var options = this.ReqServer.HTTPCachePolicy.Options
+			if options != nil {
+				fileStorage, isFileStorage := storage.(*caches.FileStorage)
+				if isFileStorage && fileStorage.Options() != nil && fileStorage.Options().EnableIncompletePartialContent {
 					var r = ranges[0]
 					r2, findOk := partialReader.Ranges().FindRangeAtPosition(r.Start())
 					if findOk && r2.Length() >= (256<<10) /* worth reading */ {
@@ -732,6 +736,8 @@ func (this *HTTPRequest) tryPartialReader(storage caches.StorageInterface, key s
 						return pReader, ranges, r2.End() - 1 /* not include last byte */, true
 					}
 				}
+			}
+		}
 		return
 	}