update: limit logBrief http body size (#3498)

Co-authored-by: 常公征 <changgz@yealink.com>

core/iox/read_test.go

@@ -108,6 +108,29 @@ func TestDupReadCloser(t *testing.T) {
 	verify(r2)
 }
 
+func TestLimitDupReadCloser(t *testing.T) {
+	input := "hello world"
+	limitBytes := int64(4)
+	reader := io.NopCloser(bytes.NewBufferString(input))
+	r1, r2 := LimitDupReadCloser(reader, limitBytes)
+	verify := func(r io.Reader) {
+		output, err := io.ReadAll(r)
+		assert.Nil(t, err)
+		assert.Equal(t, input, string(output))
+	}
+	verifyLimit := func(r io.Reader, limit int64) {
+		output, err := io.ReadAll(r)
+		if limit < int64(len(input)) {
+			input = input[:limit]
+		}
+		assert.Nil(t, err)
+		assert.Equal(t, input, string(output))
+	}
+
+	verify(r1)
+	verifyLimit(r2, limitBytes)
+}
+
 func TestReadBytes(t *testing.T) {
 	reader := io.NopCloser(bytes.NewBufferString("helloworld"))
 	buf := make([]byte, 5)