缓存条件增加"强制返回区间内容"选项

internal/nodes/http_request_cache.go

@@ -241,10 +241,12 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 		reader, err = storage.OpenReader(key, useStale, false)
 		if err != nil && this.cacheRef.AllowPartialContent {
 			// 尝试读取分片的缓存内容
-			if len(rangeHeader) == 0 {
+			if len(rangeHeader) == 0 && this.cacheRef.ForcePartialContent {
 				// 默认读取开头
 				rangeHeader = "bytes=0-"
 			}
+
+			if len(rangeHeader) > 0 {
 				pReader, ranges := this.tryPartialReader(storage, key, useStale, rangeHeader)
 				if pReader != nil {
 					isPartialCache = true
@@ -253,6 +255,7 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 					err = nil
 				}
 			}
+		}
 
 		if err != nil {
 			if err == caches.ErrNotFound {