我试图点击一个按钮，应该会导致我在我的URL中的一个特定的页面，但它不按预期运行。
mainpage.html:

<form method="POST">

<input type="button" name="Show Result" onclick="location.href='{% url 'get_result' %}'" 
value="Show Result"></input>
</form>

我的页面在视图中：

def get_result(request):

    def on_connect(client, userdata, flags, rc):
        print("Connected with result code "+str(rc))
        client.subscribe("a",)
    
    result = None
    
    def on_message(client, userdata, msg):
        global result
        result = msg.payload.decode("utf-8")
        print("Received message:", result)

    client = mqtt.Client("p1")
    client.connect("127.0.0.1", 1883)
    client.publish("test", 'C:/Users/HP/Desktop/reallifeviolencesituation/NV_4.mp4')
    client.on_connect = on_connect
    client.on_message = on_message
    client.loop_forever()
    context = {'result': result}
    return render(request, "result.html", context)

我的网址：

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', showvideo, name='showvideo'),
    path('get_result/', get_result, name='get_result')
   
]

谢谢