修复内容为空时无法缓存的Bug

internal/nodes/http_request_reverse_proxy.go

@@ -328,7 +328,12 @@ func (this *HTTPRequest) doReverseProxy() {
 
 	// 是否有内容
 	if resp.ContentLength == 0 && len(resp.TransferEncoding) == 0 {
+		// 即使内容为0，也需要读取一次，以便于触发相关事件
+		var buf = utils.BytePool4k.Get()
+		_, _ = io.CopyBuffer(this.writer, resp.Body, buf)
+		utils.BytePool4k.Put(buf)
 		_ = resp.Body.Close()
+
 		this.writer.SetOk()
 		return
 	}

internal/nodes/http_writer.go

@@ -836,7 +836,7 @@ func (this *HTTPWriter) HeaderData() []byte {
 		return nil
 	}
 
-	resp := &http.Response{}
+	var resp = &http.Response{}
 	resp.Header = this.Header()
 	if this.statusCode == 0 {
 		this.statusCode = http.StatusOK

internal/utils/readers/reader_closer_tee.go

@@ -2,7 +2,9 @@
 
 package readers
 
-import "io"
+import (
+	"io"
+)
 
 type TeeReaderCloser struct {
 	r io.Reader