python - 在使用 postgres 和 Gunicorn+Nginx 作为反向代理的 Django 应用程序中出现“类型 inet 的输入语法无效”数据库错误

Question

你能帮我破译这个相当深奥的错误吗？当我启动应用程序时一切正常，但当我尝试登录时崩溃。

DatabaseError at /login/

invalid input syntax for type inet: "" LINE 1: ...00101 Firefox/41.0', '2015-12-12 09:39:55.590036+00:00', '')

Exception Location: /home/mhb11/.virtualenvs/redditpk/local/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/base.py in execute, line 54

我知道一个事实 inet data type接受 IPv4 和 IPv6 主机和网络(但不接受域名)。

回溯如下:

Traceback:
File "/home/mhb11/.virtualenvs/redditpk/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  187.                 response = middleware_method(request, response)
File "/home/mhb11/.virtualenvs/redditpk/local/lib/python2.7/site-packages/user_sessions/middleware.py" in process_response
  46.                     request.session.save()
File "/home/mhb11/.virtualenvs/redditpk/local/lib/python2.7/site-packages/user_sessions/backends/db.py" in save
  86.                     obj.save(force_insert=must_create, using=using)
File "/home/mhb11/.virtualenvs/redditpk/local/lib/python2.7/site-packages/django/db/models/base.py" in save
  546.                        force_update=force_update, update_fields=update_fields)
File "/home/mhb11/.virtualenvs/redditpk/local/lib/python2.7/site-packages/django/db/models/base.py" in save_base
  650.                 result = manager._insert([self], fields=fields, return_id=update_pk, using=using, raw=raw)
File "/home/mhb11/.virtualenvs/redditpk/local/lib/python2.7/site-packages/django/db/models/manager.py" in _insert
  215.         return insert_query(self.model, objs, fields, **kwargs)
File "/home/mhb11/.virtualenvs/redditpk/local/lib/python2.7/site-packages/django/db/models/query.py" in insert_query
  1661.     return query.get_compiler(using=using).execute_sql(return_id)
File "/home/mhb11/.virtualenvs/redditpk/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py" in execute_sql
  937.             cursor.execute(sql, params)
File "/home/mhb11/.virtualenvs/redditpk/local/lib/python2.7/site-packages/django/db/backends/util.py" in execute
  41.             return self.cursor.execute(sql, params)
File "/home/mhb11/.virtualenvs/redditpk/local/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/base.py" in execute
  58.             six.reraise(utils.DatabaseError, utils.DatabaseError(*tuple(e.args)), sys.exc_info()[2])
File "/home/mhb11/.virtualenvs/redditpk/local/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/base.py" in execute
  54.             return self.cursor.execute(query, args)

Exception Type: DatabaseError at /login/
Exception Value: invalid input syntax for type inet: ""
LINE 1: ...00101 Firefox/41.0', '2015-12-12 09:39:55.590036+00:00', '')

urls.py 中的 /login/ url 是 url(r'^login/$', 'django.contrib.auth.views.login', {'template_name': 'login.html'}, name="login"),

环境是:

Django 1.5.1 带有 postgresql 后端 并驻留在 Ubuntu 14.04 机器上。特别要注意的是，在我将 nginx 设置为 gunicorn 后面的反向代理(使用端口 80 进行此设置)后，此错误开始出现。当我单独在端口 8080 上使用 gunicorn(和女服务员，另一个纯 python 网络服务器)时，一切都完美。

/etc/nginx/sites-available/myproject:

server {
    listen 80;
    server_name example.cloudapp.net;

    location = /favicon.ico { access_log off; log_not_found off; }
    location /static/ {
        root /home/mhb11/folder/myproject;
    }

    location / {
        include proxy_params;
        proxy_pass http://unix:/home/mhb11/folder/myproject/myproject.sock;
    }
   error_page 500 502 503 504 /500.html;
   location = /500.html {
        root /home/mhb11/folder/myproject/templates/;
   }
}

/etc/nginx/proxy_params:

proxy_set_header Host $http_host;
proxy_set_header User-Agent $http_user_agent;
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;

/etc/nginx/nginx.conf:

user www-data;
worker_processes 4;
pid /run/nginx.pid;

env ON_AZURE=1;
env awsaccesskeyid=something;
env awssecretkey=something;

events {
        worker_connections 1024;
        multi_accept on;
        use epoll;
}

http {

        ##
        # Basic Settings
        ##

        sendfile on;
        tcp_nopush on;
        tcp_nodelay on;
        keepalive_timeout 65;
        types_hash_max_size 2048;
        # server_tokens off;

        # server_names_hash_bucket_size 64;
        include /etc/nginx/mime.types;
        default_type application/octet-stream;

        ##
        # Logging Settings
        ##

        access_log /var/log/nginx/access.log;
        error_log /var/log/nginx/error.log;

        ##
        # Gzip Settings
        ##
        gzip on;
        gzip_disable "msie6";

        # gzip_vary on;
        # gzip_proxied any;
        # gzip_comp_level 6;
        # gzip_buffers 16 8k;
        # gzip_http_version 1.1;
        # gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascrip$

        ##
        # nginx-naxsi config
        ##
        # Uncomment it if you installed nginx-naxsi
        ##

        #include /etc/nginx/naxsi_core.rules;

        ##
        # nginx-passenger config
        ##
        # Uncomment it if you installed nginx-passenger
        ##

        #passenger_root /usr;
        #passenger_ruby /usr/bin/ruby;

        ##
        # Virtual Host Configs
        ##

        include /etc/nginx/conf.d/*.conf;
        include /etc/nginx/sites-enabled/*;
}


#mail {
#       # See sample authentication script at:
#       # http://wiki.nginx.org/ImapAuthenticateWithApachePhpScript
#
#       # auth_http localhost/auth.php;
#       # pop3_capabilities "TOP" "USER";
#       # imap_capabilities "IMAP4rev1" "UIDPLUS";
#
#       server {
#               listen     localhost:110;
#               protocol   pop3;
#               proxy      on;
#       }
#
#       server {
#               listen     localhost:143;
#               protocol   imap;
#               proxy      on;
#       }
#}

这是怎么回事？

注意:如果您需要，请向我询问更多信息，例如我的 gunicorn.conf 和 nginx.conf 的外观、安装的软件包或者您是否需要与数据库相关的东西。问吧!

Answer 1

您没有转发代理 IP。这是我在 nginx 配置中设置的一组转发 header :

location / {
    proxy_set_header    Host                    $http_host;
    proxy_set_header    User-Agent              $http_user_agent;
    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;
    proxy_pass          ......;
}

nginx 文档中的更多选项 - http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_set_header

然后在 Django 中你可以这样做:

user_ip = request.META['HTTP_X_REAL_IP`] or request.META['REMOTE_ADDR']

请注意，X-Forwarded-Proto 在将 Django 与 SSL 结合使用时是必需的，在这种情况下，您还需要对 Django 进行一些配置:

SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')

Django 文档中的更多信息 - https://docs.djangoproject.com/en/1.9/ref/settings/#std:setting-SECURE_PROXY_SSL_HEADER