【任务空指针异常处理】

code/tx1_box_serv/apps/api/task.py

@@ -61,14 +61,19 @@ def edit_task_inf(task_index):
     '''
           ===========================更改task_name start===============
     '''
-    if task_data.has_key('task_name'):
-        task_name = task_data['task_name']
+    if task_data.has_key('subtask_name'):
+        task_name = task_data['subtask_name']
         if task_name is not None:
             task_name_doc = editXml.parseXmlStr ( tasks[0] )
             if task_name_doc:
                 root = task_name_doc.documentElement
-                Name = root.getElementsByTagName ( "Name" )[0].childNodes[0]
-                Name.data = task_name
+                Name = root.getElementsByTagName ( "Name" )[0]
+                if Name is None or len(Name.childNodes) == 0:
+                    newtext = task_name_doc.createTextNode ( task_name )
+                    Name.appendChild ( newtext )
+                else:
+                    Name = Name.childNodes[0]
+                    Name.data = task_name
                 xml = task_name_doc.toxml ()
                 xml = xml.replace ( '<?xml version="1.0" ?>', '<?xml version="1.0"  encoding="GBK"?>' )
                 editXml.writeXml ( tasks[0], task_name_doc.toxml () )
@@ -82,9 +87,17 @@ def edit_task_inf(task_index):
         if play_url is not None:
             scenes = editXml.parseXmlStr ( os.path.join(tasks[1],'scene.xml') )
             root = scenes.documentElement
-            scen_play_url = root.getElementsByTagName ( "scene1" )[0].getElementsByTagName ( "play_urls" )[0].getElementsByTagName ( "rtsp" )[0].childNodes[0]
-            print scen_play_url.data
-            scen_play_url.data = play_url
+            #scen_play_url = root.getElementsByTagName ( "scene1" )[0].getElementsByTagName ( "play_urls" )[0].getElementsByTagName ( "rtsp" )[0].childNodes[0]
+            scen_play_url = \
+            root.getElementsByTagName ( "scene1" )[0].getElementsByTagName ( "play_urls" )[0].getElementsByTagName (
+                "rtsp" )[0]
+            print scen_play_url
+            if scen_play_url is None or len(scen_play_url.childNodes) == 0:
+                newtext = scenes.createTextNode ( play_url )
+                scen_play_url.appendChild ( newtext )
+            else:
+                scen_play_url = scen_play_url.childNodes[0]
+                scen_play_url.data = play_url
             xml = scenes.toxml ()
             xml = xml.replace( '&quot;', '"' )
             xml  = xml.replace( '<?xml version="1.0" ?>', '<?xml version="1.0"  encoding="GBK"?>' )
@@ -124,7 +137,7 @@ def edit_task_inf(task_index):
     '''
     启动任务开始
     '''
-    os.system('pkill VAServer')
+    os.system('pkill -9 VAServer')
 
     result_data = {"ecode": "200", "enote": "OK"}
     res = flask.make_response (
@@ -190,18 +203,22 @@ def read_task_name(xmlPath):
     task_name_doc = editXml.parseXmlStr( xmlPath )
     if task_name_doc:
         root = task_name_doc.documentElement
-        name = root.getElementsByTagName ( "Name" )[0].childNodes[0]
-        print 'name =%s' % name.data
-        return name.data
+        name = root.getElementsByTagName ( "Name" )[0]
+        if name is not None and len(name.childNodes) > 0:
+            name = name.childNodes[0]
+            print 'name =%s' % name.data
+            return name.data
     return ''
 
 def read_task_id(xmlPath):
     task_id_doc = editXml.parseXmlStr ( xmlPath )
     if task_id_doc:
         root = task_id_doc.documentElement
-        task_id = root.getElementsByTagName ( "task_unid" )[0].childNodes[0]
-        print 'task_id =%s' % task_id.data
-        return task_id.data
+        task_id = root.getElementsByTagName ( "task_unid" )[0]
+        if task_id is not None and len(task_id.childNodes) > 0:
+            task_id = task_id.childNodes[0]
+            print 'task_id =%s' % task_id.data
+            return task_id.data
     return ''
 
 def read_rtsp(xmlPath):
@@ -210,8 +227,10 @@ def read_rtsp(xmlPath):
         root = scenes.documentElement
         scen_play_url = \
         root.getElementsByTagName ( "scene1" )[0].getElementsByTagName ( "play_urls" )[0].getElementsByTagName (
-            "rtsp" )[0].childNodes[0]
-        return scen_play_url.data
+            "rtsp" )[0]
+        if scen_play_url is not None and len(scen_play_url.childNodes) > 0:
+            scen_play_url = scen_play_url.childNodes[0]
+            return scen_play_url.data
     return ''
 
 def make_mtasks(cal_path,roi_path,basconpath,conpath,rtsp):