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from flask import Flask, request
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app = Flask(__name__)
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@app.route('/')
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def index():
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    return '''
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    <h1>Hello from Flask!</h1>
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    <p>这个页面由 Flask 提供，通过 Nginx 反向代理访问</p>
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    <p>客户端真实 IP：{}</p>
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    '''.format(request.headers.get('X-Real-IP', request.remote_addr))
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@app.route('/api/info')
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def info():
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    return {
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        "status": "ok",
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        "message": "反向代理工作正常",
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        "real_ip": request.headers.get('X-Real-IP', '未获取到'),
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        "forwarded_for": request.headers.get('X-Forwarded-For', '无')
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    }
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if __name__ == '__main__':
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    # 只监听本地，由 Nginx 对外暴露
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    app.run(host='127.0.0.1', port=5000)

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server {
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    listen 80;
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    server_name _;    # _ 匹配所有 IP/域名，也可以写具体域名
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    access_log /var/log/nginx/flask_access.log;
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    error_log  /var/log/nginx/flask_error.log;
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    location / {
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        proxy_pass http://127.0.0.1:5000;
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        proxy_set_header Host              $host;
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        proxy_set_header X-Real-IP         $remote_addr;
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        proxy_set_header X-Forwarded-For   $proxy_add_x_forwarded_for;
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        proxy_set_header X-Forwarded-Proto $scheme;
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        proxy_connect_timeout 10s;
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        proxy_read_timeout    60s;
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        proxy_send_timeout    60s;
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    }
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}

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server {
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    listen 80;
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    server_name yourdomain.com;   # 换成你的域名或服务器 IP
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    access_log /var/log/nginx/blog_access.log;
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    error_log  /var/log/nginx/blog_error.log;
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    location / {
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        proxy_pass http://127.0.0.1:4000;   # 博客程序监听的端口
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        proxy_set_header Host              $host;
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        proxy_set_header X-Real-IP         $remote_addr;
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        proxy_set_header X-Forwarded-For   $proxy_add_x_forwarded_for;
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        proxy_set_header X-Forwarded-Proto $scheme;
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        proxy_connect_timeout 10s;
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        proxy_read_timeout    60s;
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    }
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    # 静态资源让 Nginx 直接处理，不经过博客程序（可选，提升性能）
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    location ~* \.(jpg|jpeg|png|gif|ico|css|js|woff|woff2)$ {
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        proxy_pass http://127.0.0.1:4000;
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        expires 7d;
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        add_header Cache-Control "public";
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    }
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}

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server {
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    listen 80;
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    server_name yourdomain.com;
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    access_log /var/log/nginx/blog_remote_access.log;
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    error_log  /var/log/nginx/blog_remote_error.log;
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    location / {
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        proxy_pass http://192.168.1.100:8080;
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        # 跨机器时 Host 要设置成博客实际绑定的域名
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        proxy_set_header Host              yourdomain.com;
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        proxy_set_header X-Real-IP         $remote_addr;
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        proxy_set_header X-Forwarded-For   $proxy_add_x_forwarded_for;
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        proxy_set_header X-Forwarded-Proto $scheme;
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        # 跨网络延迟可能更高，超时时间适当调大
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        proxy_connect_timeout 15s;
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        proxy_read_timeout    120s;
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        proxy_send_timeout    120s;
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    }
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}