====== Redis 服务 ======

[[https://redis.io/docs/getting-started/|Redis Docs]] 按照官方说明ubuntu系统下进行安装就好。

===== 安装与访问 =====


前台启动服务 <color #ff7f27>''%%redis-server%%''</color> 按 ctrl + c 即可终止服务。后台启动使用
<code >
systemctl start redis-server
systemctl status redis-server
systemctl stop redis-server
systemctl restart redis-server
// 或者
service redis-server restart
</code> 

访问服务器 (mac也就是客户端 本地redis服务也需要启动)
<code>
redis-cli // 访问本地
redis-cli -h serverfin -p 6379
</code>

===== 加密访问 =====

设置密码：
  - 方法1：修改 /etc/redis/redis.conf 文件， "<color #7092be>requirepass <password></color>" 并重启服务
  - 方法2：<color #ff7f27>''%%CONFIG set requirepass "<pw>"%%''</color> 

客户端连接
<code | download>
redis-cli -h serverfin -p 6379
serverfin:6379> AUTH "138629"
serverfin:6379> subscribe maichannel // 认证后才允许订阅频道
</code>

===== 订阅与发布 =====
<code download>
// 订阅
redis 127.0.0.1:6379> SUBSCRIBE <channelname>
// 发布
redis 127.0.0.1:6379> PUBLISH <channelname> "messa...."
</code>

===== Node.js 使用 =====

[[https://docs.redis.com/latest/rs/references/client_references/client_nodejs/|Redis with Node.js]]

<code >
var redis = require('redis');

var client = redis.createClient("6379", "127.0.0.1", {auth_pass: "yoursecret"});
client.on('connect', function () {
    //client.hset("hash key", "field 1", "v1", redis.print);
    //client.hget("hash key", "field 1", redis.print);
    //client.quit();
});

var client1 = redis.createClient("6379", "127.0.0.1", {auth_pass: "yoursecret"});
client1.on('connect', function () {
    client1.subscribe("channel");
});
client1.on("message", function (channel, message) {
    console.log("普通订阅接收到来自" + channel + "的信息:" + message);
    if (message == "demo") {
        client.publish("demo","demo msg");
    }
    if (message == "quit1") {
        client1.unsubscribe("channel");
        console.log("普通订阅操作已经取消");
        //client2.quite();
    }
});

var client2 = redis.createClient("6379", "127.0.0.1", {auth_pass: "yoursecret"});
client2.on('connect', function () {
    client2.psubscribe("channel*");
});
client2.on("pmessage", function (p, channel, message) {
    console.log("批量订阅接收到来自" + channel + "的信息:" + message);
    if (message == "quit2") {
        client2.punsubscribe("channel*");
        console.log("批量订阅操作已经取消");
        //client2.quite();
    }
});

</code>