blocks|key|924455|text|实际上，你会发现，简单地获取以下内容将会得到服务器的地址：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|924456|request.remote_addr|code-block|syntax|javascript|924457|如果您需要客户端的IP地址，请使用以下命令：|924458|request.environ['REMOTE_ADDR']|924459|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Actually, what you will find is that when simply getting the following will get you the server's address: 

<pre><code>request.remote_addr
</code></pre>

If you want the clients IP address, then use the following:

<pre><code>request.environ['REMOTE_ADDR']
</code></pre>

blocks|key|1138909|text|可以使用以下代码片段检索用户的IP地址：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1138910|from+flask+import+request
print(request.remote_addr)|code-block|syntax|javascript|1138911|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The user's IP address can be retrieved using the following snippet:

<pre><code>from flask import request
print(request.remote_addr)
</code></pre>

blocks|key|1139050|text|下面的代码总是给出客户端的公网IP+(而不是代理背后的内网IP+)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1139051|from+flask+import+request

if+request.environ.get('HTTP_X_FORWARDED_FOR')+is+None:
++++print(request.environ['REMOTE_ADDR'])
else:
++++print(request.environ['HTTP_X_FORWARDED_FOR'])+#+if+behind+a+proxy|code-block|syntax|javascript|1139052|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The below code always gives the public IP of the client (and not a private IP behind a proxy).

<pre><code>from flask import request

if request.environ.get('HTTP_X_FORWARDED_FOR') is None:
 print(request.environ['REMOTE_ADDR'])
else:
 print(request.environ['HTTP_X_FORWARDED_FOR']) # if behind a proxy
</code></pre>

blocks|key|924475|text|httpbin.org使用以下方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|924476|return+jsonify(origin=request.headers.get('X-Forwarded-For',+request.remote_addr))|code-block|syntax|javascript|924477|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/Runscope/httpbin^0|0|B|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

<a href="https://github.com/Runscope/httpbin" rel="noreferrer">httpbin.org</a> uses this method:

<pre><code>return jsonify(origin=request.headers.get('X-Forwarded-For', request.remote_addr))
</code></pre>

blocks|key|1139101|text|如果你在其他均衡器后面使用Nginx，例如亚马逊网络服务应用均衡器，HTTP_X_FORWARDED_FOR会返回地址列表。它可以像这样修复：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1139102|if+'X-Forwarded-For'+in+request.headers:
++++proxy_data+=+request.headers['X-Forwarded-For']
++++ip_list+=+proxy_data.split(',')
++++user_ip+=+ip_list[0]++#+first+address+in+list+is+User+IP
else:
++++user_ip+=+request.remote_addr++#+For+local+development|code-block|syntax|javascript|1139103|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you use Nginx behind other balancer, for instance AWS Application Balancer, HTTP_X_FORWARDED_FOR returns list of addresses. It can be fixed like that:

<pre><code>if 'X-Forwarded-For' in request.headers:
 proxy_data = request.headers['X-Forwarded-For']
 ip_list = proxy_data.split(',')
 user_ip = ip_list[0] # first address in list is User IP
else:
 user_ip = request.remote_addr # For local development
</code></pre>

blocks|key|1139152|text|如果您使用的是Gunicorn和Nginx环境，那么以下代码模板适用于您。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1139153|addr_ip4+=+request.remote_addr|code-block|syntax|javascript|1139154|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If You are using Gunicorn and Nginx environment then the following code template works for you.

<pre><code>addr_ip4 = request.remote_addr
</code></pre>

blocks|key|924496|text|这应该可以完成这项工作。它提供客户端IP地址(远程主机)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|924497|请注意，此代码在服务器端运行。|924498|from+mod_python+import+apache

req.get_remote_host(apache.REMOTE_NOLOOKUP)|code-block|syntax|javascript|924499|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

This should do the job. 
It provides the client IP address (remote host).

Note that this code is running on the server side.

<pre><code>from mod_python import apache

req.get_remote_host(apache.REMOTE_NOLOOKUP)
</code></pre>

blocks|key|924666|text|我没有使用Google+Cloud+App+Engine完成上述任何工作。然而，这是可行的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|924667|ip+=+request.headers['X-Appengine-User-Ip']|code-block|syntax|javascript|924668|建议的request.remote_addr每次都只返回本地主机ip。|offset|length|style|CODE|924669|entityMap^0|0|0|3|J|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I did not get any of the above work with Google Cloud App Engine. This worked, however
<pre><code>ip = request.headers['X-Appengine-User-Ip']
</code></pre>
The proposed <code>request.remote_addr</code> did only return local host ip every time.

blocks|key|1139249|text|这里是最简单的解决方案，以及如何在生产中使用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1139250|from+flask+import+Flask,+request
from+werkzeug.middleware.proxy_fix+import+ProxyFix
app+=+Flask(__name__)
#+Set+environment+from+any+X-Forwarded-For+headers+if+proxy+is+configured+properly
app.wsgi_app+=+ProxyFix(app.wsgi_app,+x_host=1)

@app.before_request
def+before_process():
+++ip_address+=+request.remote_addr|code-block|syntax|javascript|1139251|将include+proxy_params添加到/etc/nginx/sites-available/$project。proxy_params转发要由ProxyFix解析的标头|offset|length|style|CODE|1139252|++location+/+{
++++proxy_pass+http://unix:$project_dir/gunicorn.sock;
++++include+proxy_params;
++}|1139253|sudo+cat+/etc/nginx/proxy_params|1139254|proxy_set_header+Host+$http_host;
proxy_set_header+X-Real-IP+$remote_addr;
proxy_set_header+X-Forwarded-For+$proxy_add_x_forwarded_for;
proxy_set_header+X-Forwarded-Proto+$scheme;|1139255|entityMap^0|0|0|1|K|O|Z|1O|C|0|0|0|W|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@$I|X|J|Y|K|L]|$I|Z|J|10|K|L]|$I|11|J|12|K|L]]|9|@]|A|$]]|$1|M|3|N|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|14|8|@$I|15|J|16|K|L]]|9|@]|A|$]]|$1|Q|3|R|5|D|7|17|8|@]|9|@]|A|$E|F]]|$1|S|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|T|$]]

Here is the simplest solution, and how to use in production.
<pre class="lang-py prettyprint-override"><code>from flask import Flask, request
from werkzeug.middleware.proxy_fix import ProxyFix
app = Flask(__name__)
# Set environment from any X-Forwarded-For headers if proxy is configured properly
app.wsgi_app = ProxyFix(app.wsgi_app, x_host=1)

@app.before_request
def before_process():
 ip_address = request.remote_addr
</code></pre>
Add <code>include proxy_params</code> to <code>/etc/nginx/sites-available/$project</code>. <code>proxy_params</code> forwards headers to be parsed by ProxyFix
<pre><code> location / {
 proxy_pass http://unix:$project_dir/gunicorn.sock;
 include proxy_params;
 }
</code></pre>
<code>sudo cat /etc/nginx/proxy_params</code>
<pre><code>proxy_set_header Host $http_host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
</code></pre>

I'm making a website where users can log on and download files, using the <a href="http://flask.pocoo.org/" rel="noreferrer">Flask micro-framework</a> (based on <a href="http://werkzeug.pocoo.org/" rel="noreferrer">Werkzeug</a>) which uses Python (2.6 in my case).

I need to get the IP address of users when they log on (for logging purposes). 
Does anyone know how to do this? Surely there is a way to do it with Python?

Get IP address of visitors using Flask for Python

服务器

Python

我正在制作一个网站，用户可以登录并下载文件，使用的是 (基于)，它使用Python (我的例子是2.6)。我需要在用户登录时获取他们的IP地址(用于日志记录)。有人知道怎么做吗？当然有办法用Python做到这一点吧？

问使用Flask for Python获取访问者的IP地址
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