访问Django项目出现DisallowedHost at / Invalid HTTP_HOST header问题

闲来无事，想玩玩django，源码安装碰到了一堆乱七八糟依赖性问题，耗费一下午的时间总算是在ubuntu14.04上搭建好了python3+django2开发环境，

心血来潮，创建了一个django项目，启动运行，好吧又碰到问题了。如下：

DisallowedHost at /
Invalid HTTP_HOST header: '192.168.1.156:8000'. You may need to add '192.168.1.156' to ALLOWED_HOSTS.
Request Method:    GET
Request URL:    http://192.168.1.156:8000/
Django Version:    2.0
Exception Type:    DisallowedHost
Exception Value:    
Invalid HTTP_HOST header: '192.168.1.156:8000'. You may need to add '192.168.1.156' to ALLOWED_HOSTS.
Exception Location:    /usr/local/lib/python3.4/dist-packages/django/http/request.py in get_host, line 105
Python Executable:    /usr/bin/python3
Python Version:    3.4.3
Python Path:    
['/home/liuxin/work/python/django/mysite',
 '/usr/lib/python3.4',
 '/usr/lib/python3.4/plat-i386-linux-gnu',
 '/usr/lib/python3.4/lib-dynload',
 '/usr/local/lib/python3.4/dist-packages',
 '/usr/lib/python3/dist-packages']
Server time:    Mon, 18 Dec 2017 10:33:29 +0000
Traceback Switch to copy-and-paste view
/usr/local/lib/python3.4/dist-packages/django/core/handlers/exception.py in inner
            response = get_response(request) ...
▶ Local vars
/usr/local/lib/python3.4/dist-packages/django/utils/deprecation.py in __call__
            response = self.process_request(request) ...

猜测了下大概可能也许八成..是权限的问题，我的ubuntu是安装在虚拟机中的，于是我试了一下在虚拟机中通过浏览器能够正常访问，但是在我的pc机上就不能访问，这下可以断定，是因为权限问题，上网百度了一下，django工程项目中settings.py的文件，这个文件是项目的一些配置设置，打开这个文件找到“ALLOWED_HOSTS”关键字的位置

默认这个列表是空的(也就是指允许本机访问)

ALLOWED_HOSTS = []

修改这个列表：

ALLOWED_HOSTS = ['*'] # 允许所有的主机

当然也可以指定可访问主机的ip：

ALLOWED_HOSTS = ['198.211.99.20', 'localhost', '127.0.0.1']

ok，问题解决，下班回家。