use buffer to deliver sitemap

main.go

@@ -29,7 +29,6 @@ import (
 	"golang.org/x/text/language"
 	"golang.org/x/time/rate"
 	"gopkg.in/yaml.v3"
-	"io"
 	"net"
 	"net/http"
 	"os"
@@ -1092,16 +1091,13 @@ func getSiteMap(c *gin.Context) {
 		}
 	}
 
-	tReader, tWriter := io.Pipe()
-
+	readBuf := new(bytes.Buffer)
 	sm.Finalize()
-	go func() {
-		_, err = sm.WriteTo(tWriter)
-		if err != nil {
-			log.Warningf("error writing to pipe: %v", err)
-		}
-	}()
-	c.DataFromReader(http.StatusOK, -1, "application/xml", tReader, nil)
+	_, err = sm.WriteTo(readBuf)
+	if err != nil {
+		log.Warningf("error writing to pipe: %v", err)
+	}
+	c.DataFromReader(http.StatusOK, int64(readBuf.Len()), "application/xml", readBuf, nil)
 }
 
 /*