下面是最简单的解决方案，以及如何在生产中使用。

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

添加include proxy_params到/etc/nginx/sites-available/$project。

  location / {
    proxy_pass http://unix:$project_dir/gunicorn.sock;
    include proxy_params;
  }

include proxy_params转发ProxyFix解析的以下报头。

$ sudo cat /etc/nginx/proxy_params 
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;

下面是最简单的解决方案，以及如何在生产中使用。

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

添加include proxy_params到/etc/nginx/sites-available/$project。

  location / {
    proxy_pass http://unix:$project_dir/gunicorn.sock;
    include proxy_params;
  }

include proxy_params转发ProxyFix解析的以下报头。

$ sudo cat /etc/nginx/proxy_params 
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;

下面的代码总是给出客户端的公共IP(而不是代理背后的私有IP)。

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

实际上，你会发现，当简单地获取以下信息时，你会得到服务器的地址:

request.remote_addr

如果你想要客户端的IP地址，那么使用下面的方法:

request.environ['REMOTE_ADDR']

用户的IP地址可以使用以下片段检索:

from flask import request
print(request.remote_addr)

请参阅文档，了解如何访问Request对象，然后从同一个Request对象获取属性remote_addr。

代码示例

from flask import request
from flask import jsonify

@app.route("/get_my_ip", methods=["GET"])
def get_my_ip():
    return jsonify({'ip': request.remote_addr}), 200

有关更多信息，请参阅Werkzeug文档。