django The 'Access-Control-Allow-Origin' header contains multiple values 'http://localhost:8080, *',

跨域报错

The 'Access-Control-Allow-Origin' header contains multiple values 'http://localhost:8080, *', but only one is allowed. Origin 'http://localhost:8080' is therefore not allowed access.

原因  可能是django 和nginx中都配置了跨域导致的

去掉nginx 配置中的跨域就可了

原来nginx配置

server {
    listen       80;                           # 监听端口
    server_name  3.1931.15.12 ;    # 站点域名
    autoindex    on;
    charset    utf-8;
    
    #charset koi8-r;                           # 编码格式
    add_header Access-Control-Allow-Origin *;
    add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS';
    add_header Access-Control-Allow-Headers 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization';
    #虚拟主机访问日志定义
    access_log  /var/log/nginx/nginx_access.log; # 虚机访问日志存放地
    error_log  /var/log/nginx/nginx_error.log; # 虚机访问错误日志存放地
    client_max_body_size  75M;    
    
   location / {
        include /etc/nginx/uwsgi_params;
        uwsgi_pass 172.30.0.12:8111;
        #proxy_pass   http://172.30.0.12:8111/; # 代理转发地址
}

    location /static/ {
            #autoindex on;
            alias /var/www/volley/static/;
        }

    error_page   500 502 503 504  /50x.html;

}

更改后配置

server {
    listen       80;                           # 监听端口
    server_name  94.191.15.122 ;    # 站点域名
    autoindex    on;
    charset    utf-8;
    
    access_log  /var/log/nginx/nginx_access.log; # 虚机访问日志存放地
    error_log  /var/log/nginx/nginx_error.log; # 虚机访问错误日志存放地
    client_max_body_size  75M;    
    
   location / {
        include /etc/nginx/uwsgi_params;
        uwsgi_pass 172.30.0.12:8111;
        #proxy_pass   http://172.30.0.12:8111/; # 代理转发地址
}

    location /static/ {
            #autoindex on;
            alias /var/www/volley/static/;
        }

    error_page   500 502 503 504  /50x.html;

}

下面三行是增加跨域的 去掉

  add_header Access-Control-Allow-Origin *;
    add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS';
    add_header Access-Control-Allow-Headers 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization';