blocks|key|133615|text|像这样运行你的应用程序：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|133616|if+__name__+==+'__main__':
++++app.run(host='0.0.0.0')|code-block|syntax|javascript|133617|它将使服务器成为externally+visible。如果机器的IP地址是192.168.X.X，那么您可以通过5000端口从同一网络访问它。比如，http://192.168.X.X:5000|offset|length|style|CODE|133618|entityMap|0|LINK|mutability|MUTABLE|url|http://flask.pocoo.org/docs/1.0/quickstart/#public-server|1|http://192.168.x.x:5000/^0|0|0|11|B|8|I|0|22|N|1|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@$I|Z|J|10|K|L]]|9|@$I|11|J|12|1|13]|$I|14|J|15|1|16]]|A|$]]|$1|M|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]|U|$5|P|Q|R|A|$S|V]]]]

Run your app like this:

<pre><code>if __name__ == '__main__':
 app.run(host='0.0.0.0')
</code></pre>

It will make the server <a href="http://flask.pocoo.org/docs/1.0/quickstart/#public-server" rel="noreferrer">externally visible</a>. If the IP address of the machine is <code>192.168.X.X</code> then, from the same network you can access it in 5000 port. Like, <a href="http://192.168.X.X:5000" rel="noreferrer">http://192.168.X.X:5000</a>

blocks|key|2911525|text|当您通过flask+run运行服务器时，将其更改为flask+run+--host=0.0.0.0以进行连接，找到运行脚本的服务器的IPV4地址。在同一网络上，转到http://[IPV4+address]:5000|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2911526|entityMap^0|4|9|P|O|2A|Q|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

when you are running the server via <code>flask run</code> change it to <code>flask run --host=0.0.0.0</code>
to connect, find the IPV4 address of the server that your script is running on. On the same network, go to <code>http://[IPV4 address]:5000</code>

blocks|key|2911532|text|原因也可能是防火墙拒绝端口5000上的传入连接。尝试：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2911533|sudo+ufw+allow+5000|code-block|syntax|javascript|2911534|entityMap^0|6|3|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

A reason could also be in firewall refusing incoming connections on port 5000. Try:

<pre><code>sudo ufw allow 5000
</code></pre>

blocks|key|132489|text|app.run(host='0.0.0.0',port=5000)|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|132490|如果你以这种方式运行你的应用程序，那么你的服务器将在外部可见。Setp步骤：|unstyled|132491|132492|使用以下命令运行您的应用程序|ordered-list-item|132493|132494|主机(+port=5000)|132495|Go+=‘0.0.0.0’，app.run+to+the+window+cmd.键入ipconfig并获取获取IPV4地址假设您的IPV4地址是移动浏览器的192.168.X.X|unordered-list-item|offset|length|style|BOLD|132496|
|132497|Go地址，然后键入192.168.X.X:5000|132498|132499|entityMap^0|0|0|0|0|0|0|E|10|0|0|9|G|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|12|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|13|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|14|8|@]|9|@]|A|$]]|$1|K|3|-4|5|F|7|15|8|@]|9|@]|A|$]]|$1|L|3|M|5|F|7|16|8|@]|9|@]|A|$]]|$1|N|3|O|5|P|7|17|8|@$Q|18|R|19|S|T]]|9|@]|A|$]]|$1|U|3|V|5|F|7|1A|8|@]|9|@]|A|$]]|$1|W|3|X|5|P|7|1B|8|@$Q|1C|R|1D|S|T]]|9|@]|A|$]]|$1|Y|3|-4|5|F|7|1E|8|@]|9|@]|A|$]]|$1|Z|3|-4|5|F|7|1F|8|@]|9|@]|A|$]]]|10|$]]

<pre><code>app.run(host='0.0.0.0',port=5000)
</code></pre>

if you run your app in this way then your server will be visible externally.
Steps by Setp:

<ol>
<li>Run your app by using the following command

app.run(host='0.0.0.0',port=5000)</li>
<li>Go to the window cmd . Type ipconfig and get the get the IPV4 adress suppose your IPV4 address is 192.168.X.X</li>
<li>Go to the mobile browser and type the 192.168.X.X:5000</li>
</ol>

blocks|key|2911550|text|如果你的app.run()中有debug+=+True，那么其他机器也看不到它。在不带debug+=+True的app.run()中指定主机和端口。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2911551|entityMap^0|4|9|F|C|17|C|1K|9|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|G|$]]

If you have <code>debug = True</code> inside your <code>app.run()</code>, then it will not be visible to other machines either. Specify host and port inside <code>app.run()</code> without the <code>debug = True</code>.

blocks|key|133610|text|您必须运行开发服务器，以便它侦听所有接口上的请求，而不仅仅是本地接口上的请求|type|unstyled|depth|inlineStyleRanges|entityRanges|data|133611|请求Flask在0.0.0.0:PORT_NUMBER上收听|offset|length|style|CODE|133612|或您可以选择的任何其他端口|133613|entityMap^0|0|8|J|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

You will have to run the development server such that it listens to requests on all interfaces and not just the local one

Ask Flask to listen on <code>0.0.0.0:PORT_NUMBER</code>

or any other port you may choose

blocks|key|2911569|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2911570|两个设备必须连接到同一网络。|unordered-list-item|2911571|使用app.run(host='0.0.0.0',port=5000)并使用您自己的Ipv4地址运行，就像他的[http://[Your](http://[Your]+Ipv4应用程序一样您正在使用安卓应用程序连接此应用程序，然后不要忘记将互联网权限放在清单文件中。|offset|length|style|CODE|2911572|2911573|entityMap|0|LINK|mutability|MUTABLE|url|http://[Your](http://[Your^0|0|0|2|X|1K|Q|0|0|0^^$0|@$1|2|3|-4|4|5|6|S|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|T|7|@]|8|@]|9|$]]|$1|D|3|E|4|C|6|U|7|@$F|V|G|W|H|I]]|8|@$F|X|G|Y|1|Z]]|9|$]]|$1|J|3|-4|4|5|6|10|7|@]|8|@]|9|$]]|$1|K|3|-4|4|5|6|11|7|@]|8|@]|9|$]]]|L|$M|$4|N|O|P|9|$Q|R]]]]

<ul>
<li>Both devices must be connected to same network.</li>
<li>Use <code>app.run(host='0.0.0.0',port=5000)</code> and run with your own Ipv4
address like his <a href="http://[Your" rel="nofollow noreferrer">http://[Your</a> Ipv4 address]:5000</li>
<li>If you are connecting this with android app then don't forget to
put INTERNET permission in manifest file.</li>
</ul>

blocks|key|135538|text|好吧，我也在这里知道答案，但我想我发现了问题。原因是您可能无法激活或运行flask，这就是它显示错误的原因。为此，你必须从终端"flask+run“开始，然后你的flask肯定会运行……|type|unstyled|depth|inlineStyleRanges|entityRanges|data|135539|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Well i was also here to know answer but i guess i found out problem. The reason is that you may not activated or run flask that's why it is showing error. For that you have to start from terminal &quot;flask run&quot; and then surely your flask will run...

I'm trying to run a simple web server on a Raspberry Pi with Flask. When I run my Flask app, it says:

<blockquote>
 running on <a href="http://127.0.0.1:5000/" rel="noreferrer">http://127.0.0.1:5000/</a>
</blockquote>

But when I enter this address on my laptop's in Chrome, I get 

<blockquote>
 ERR_CONNECTION_REFUSED
</blockquote>

I can open 127.0.0.1:5000 on the Raspberry Pi's browser. What do I need to do to connect from another computer?

Can't connect to Flask web service, connection refused

我正在尝试用Flask在树莓派上运行一个简单的web服务器。当我运行我的Flask应用程序时，它说：在上运行的但是当我在我的笔记本电脑的Chrome中输入这个地址时，我会得到 ERR_CONNECTION_REFUSED我可以在Raspberry Pi的浏览器上打开127.0.0.1:5000。我需要做什么才能从另一台计算机连接？

问无法连接到Flask web服务，连接被拒绝
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