Nginx 下载权限错误 - Open() failed (13: Permission denied)

Question

我有一个带有Nginx + Uwsgi + Django 的网页，其中我有一个名为/download 的外部路径来管理Django 中的下载（用户凭据）和内部路径/download-nginx 来实际下载目录/var/wwww/download 上的文件.为了试验，我尝试使用我的用户名以及默认的 nginx 用户来执行此操作。有了他们两个，我在 Nginx 上得到了一个权限被拒绝的错误：

open() "/var/www/download/example.txt" failed (13: Permission denied)

我已经阅读了其他几个关于 SO 的解决方案，说明问题是 nginx.conf 中提供的用户没有足够的权限。问题是他们确实有足够的权限：

$ sudo -u nginx stat /var

  File: ‘/var’
  Size: 4096            Blocks: 8          IO Block: 4096   directory
Device: 802h/2050d      Inode: 50331745    Links: 21
Access: (0777/drwxrwxrwx)  Uid: (  996/   nginx)   Gid: (    0/    root)
Context: system_u:object_r:var_t:s0
Access: 2021-11-23 11:24:53.329927606 +0000
Modify: 2021-11-23 09:43:29.250244353 +0000
Change: 2021-11-23 11:21:37.151148760 +0000

另外，以防万一我在目录 /var/wwww/download 上递归地完成了 chmod 777

我的nginx.conf文件如下：

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

# Load dynamic modules. See /usr/share/doc/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;

events {
    worker_connections 1024;
}

http {
    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  /var/log/nginx/access.log  main;

    sendfile            on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 4096;

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

    client_max_body_size 128M;
    proxy_max_temp_file_size 0;
    proxy_buffering off;
    server_names_hash_bucket_size 256;

    # Load modular configuration files from the /etc/nginx/conf.d directory.
    # See http://nginx.org/en/docs/ngx_core_module.html#include
    # for more information.
    include /etc/nginx/conf.d/*.conf;

    upstream django {
        server 127.0.0.1:8000;
    }

    server {
        listen       80;
        listen       [::]:80;
        server_name  _;
        root         /usr/share/nginx/html;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;

    location /download-nginx {
            internal;
            alias /var/www/download;
            sendfile on;
            proxy_max_temp_file_size 0;
    }

    location / {
        uwsgi_pass django;
        proxy_read_timeout 300s;
        proxy_connect_timeout 75s;
        uwsgi_param Host $host;
        uwsgi_param X-Real-IP $remote_addr;
        uwsgi_param X-Forwarded-For $proxy_add_x_forwarded_for;
        uwsgi_param X-Forwarded-Proto $http_x_forwarded_proto;

        uwsgi_param QUERY_STRING $query_string;
        uwsgi_param REQUEST_METHOD $request_method;
        uwsgi_param CONTENT_TYPE $content_type;
        uwsgi_param CONTENT_LENGTH $content_length;
        uwsgi_param REQUEST_URI $request_uri;
        uwsgi_param PATH_INFO $document_uri;
        uwsgi_param DOCUMENT_ROOT $document_root;
        uwsgi_param SERVER_PROTOCOL $server_protocol;
        uwsgi_param HTTPS $https if_not_empty;
        uwsgi_param REMOTE_ADDR $remote_addr;
        uwsgi_param REMOTE_PORT $remote_port;
        uwsgi_param SERVER_PORT $server_port;
        uwsgi_param SERVER_NAME $server_name;
    }

    error_page 404 /404.html;
        location = /404.html {
        }

        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
        }
    }

}

我的 Django 网页上的下载视图如下，（虽然我很确定这个错误不在这个 sn-p 上）：

def download(request):
    # Auth code is ommitted #
    response = HttpResponse()
    path = "/var/www/download/example.txt"
    name = "example.txt"
    response['Content-Length'] = os.path.getsize(path)
    response['X-Accel-Redirect'] = "/download-nginx/{0}".format(name)
    del response['Content-Type']
    del response['Content-Disposition']
    del response['Accept-Ranges']
    del response['Set-Cookie']
    del response['Cache-Control']
    del response['Expires']
    return response

因此，我的问题是：我应该在我的 Centos 机器上做什么才能访问/var/www/download 上的数据并将其作为可下载元素提供给用户？

Answer 1

问题已解决：Nginx 需要每个目录的 +x 权限。这已解决：

sudo chmod +x /var
sudo chmod +x /var/www
sudo chmod +x /var/www/download