From 28df05e261c0d63050d0bd938b7a6a2c2938b8e9 Mon Sep 17 00:00:00 2001
From: mrjackwang <30337754+mrjackwang@users.noreply.github.com>
Date: 星期六, 06 八月 2022 09:42:28 +0800
Subject: [PATCH] Merge branch '648540858:wvp-28181-2.0' into wvp-28181-2.0

---
 src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/SIPRequestHeaderProvider.java |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/SIPRequestHeaderProvider.java b/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/SIPRequestHeaderProvider.java
index cb208a3..349732b 100644
--- a/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/SIPRequestHeaderProvider.java
+++ b/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/SIPRequestHeaderProvider.java
@@ -228,8 +228,13 @@
 	public Request createInfoRequest(Device device, StreamInfo streamInfo, String content)
 			throws PeerUnavailableException, ParseException, InvalidArgumentException {
 		Request request = null;
-		if (streamInfo == null) return null;
+		if (streamInfo == null) {
+			return null;
+		}
 		Dialog dialog = streamSession.getDialogByStream(streamInfo.getDeviceID(), streamInfo.getChannelId(), streamInfo.getStream());
+		if (dialog == null) {
+			return null;
+		}
 
 		SipURI requestLine = sipFactory.createAddressFactory().createSipURI(device.getDeviceId(),
 				device.getHostAddress());

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