nginx 内部重定向下载文件

nginx 内部重定向下载文件

客户端访问下载接口后，先由 flask 处理，进行权限校验等，再重定向到 nginx 下载接口；
在响应头中增加X-Accel-Redirect配置，nginx 内部重定向

flask 代码

@app.route("/download_pack")
def download_pack()
    """
    业务处理，权限判断等
    """
    headers = {
        'X-Accel-Redirect': f'/packages/{package_name}',  # 配置重定向路径，由 nginx 负责下载
        'X-Accel-Buffering': 'yes',
        'Content-Type': 'application/octet-stream',
        'Content-Disposition': f'attachment; filename={package_name}'  # 配置后浏览器才会自动下载
    }
    ret = make_response('', 200, headers)
    return ret

nginx 中配置

#user  nobody;
worker_processes 1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;
events {
    worker_connections 1024;
}


http {
    include mime.types;
    default_type application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;
    sendfile on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout 65;

    #gzip  on;
    upstream flask-server {
        server 127.0.0.1:8000;
    }
    server {
        listen 80;
        server_name localhost;
        server_tokens off;
        # flask 负责接口
        location / {
            proxy_pass http://flask-server;
            proxy_redirect off;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }
        # 内部重定向下载接口
        location /packages {
            internal;  # 内部接口
            alias /packages;
        }
    }
}