Nginx中map指令的具体使用

语法: 只能配置在http块内
map string $variable {...}

map $http_host $name {
    hostnames;

    default       0;

    example.com   1;
    *.example.com 1;
    example.org   2;
    *.example.org 2;
    .example.net  3;
    wap.*         4;
}

    map $cookie_cl_env_num $cl_backend_map {
        default   1.1.1.1:80;
        dev-01    upstream_dev-01;
        dev-02    upstream_dev-02;
        dev-03    upstream_dev-03;
        test-01   upstream_test-01;
        test-02   upstream_test-02;
        test-03   upstream_test-03;
        test-04   upstream_test-04;
        test-05   upstream_test-05;
        test-06   upstream_test-06;
        test-07   upstream_test-07;
        test-08   upstream_test-08;
        test-09   upstream_test-09;
        test-10   upstream_test-10;
        test-11   upstream_test-11;
        test-12   upstream_test-12;
        test-13   upstream_test-13;
        test-14   upstream_test-14;
        test-15   upstream_test-15;
    }

    # 随便写一个
    upstream upstream_test-14 {
        server 2.2.2.2:80;
    }

    # 局部实现写一下
    location / {
        pass_pass http://$cl_backend_map;
    }

    # 请求
    curl --cookie "cl_env_num=test-15" a.test.com/api/v1/hahaha

map $http_origin $allow_origin {
    ~http://www.baidu.com http://www.baidu.com;
    ~http://m.baidu.com   http://m.baidu.com;
    ~http://a.baidu.com   http://a.baidu.com;
    default               deny;
}

server {
    listen 80;
    server_name www.baidu.com;

    location / {
        ...
        add_header Access-Control-Allow-Origin $allow_origin;
        ...
    }
}