fix wrong ip address behind proxy

project/__init__.py

@@ -1,10 +1,11 @@
-from flask import Flask, request
+from flask import Flask, request, send_from_directory
 from flask_sqlalchemy import SQLAlchemy
 from flask_login import LoginManager
 import yaml
 import logging
 import time
 import traceback
+import os
 
 # init SQLAlchemy so we can use it later in our models
 db = SQLAlchemy()
@@ -59,17 +60,30 @@ logger = logging.getLogger('waitress')
 logger.setLevel(app.config['LOGGING_LEVEL'])
 
 
+def get_actual_addr(request):
+    ip = request.remote_addr
+    if request.headers.getlist("X-Forwarded-For"):
+        ip = request.headers.getlist("X-Forwarded-For")[0]
+    return ip
+
+
+@app.route('/favicon.ico')
+def favicon():
+    return send_from_directory(os.path.join(app.root_path, 'static'),
+                               'favicon.ico', mimetype='image/vnd.microsoft.icon')
+
+
 @app.before_request
 def before_request():
     timestamp = time.strftime('[%Y-%b-%d %H:%M]')
-    logger.info('%s > %s %s %s %s', timestamp, request.remote_addr,
+    logger.info('%s > %s %s %s %s', timestamp, get_actual_addr(request),
                 request.method, request.scheme, request.full_path)
 
 
 @app.after_request
 def after_request(response):
     timestamp = time.strftime('[%Y-%b-%d %H:%M]')
-    logger.info('%s < %s %s %s %s %s', timestamp, request.remote_addr,
+    logger.info('%s < %s %s %s %s %s', timestamp, get_actual_addr(request),
                 request.method, request.scheme, request.full_path, response.status)
     return response
 
@@ -79,5 +93,5 @@ def exceptions(e):
     tb = traceback.format_exc()
     timestamp = time.strftime('[%Y-%b-%d %H:%M]')
     logger.error('%s %s %s %s %s 5xx INTERNAL SERVER ERROR\n%s', timestamp,
-                 request.remote_addr, request.method, request.scheme, request.full_path, tb)
+                 get_actual_addr(request), request.method, request.scheme, request.full_path, tb)
     return e.status_code

project/templates/base.html

@@ -7,6 +7,7 @@
     <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
     <title>Flask</title>
+    <link rel="shortcut icon" href="{{ url_for('static', filename='favicon.ico') }}"/>
     <link rel="stylesheet"
           href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css"/>
     <link rel="stylesheet"

project/templates/chat.html

@@ -7,7 +7,7 @@
         </ul>
       </div>
       <div class="fixed-bottom form-inline">
-        <textarea id="msgbox" class="form-control" style="width:85%; float: left; margin-bottom: 20px;"></textarea>
+        <textarea id="msgbox" class="form-control" style="width:85%; float: left; margin-bottom: 20px;" placeholder="说点什么吧"></textarea>
         <button id="btn-send"
                 class="btn btn-info"
                 type="button"