ngx_http_redis缓存页面

server {
    listen 80;
    server_name *.bh.cn;

    set $geta "";
    location /iask/ {
        set_md5 $md5 $host$request_uri;
        set $geta $request_uri;
        set $redis_key $md5;
        redis_pass 10.1.102.232:9221;
        add_header "file-md5" $md5;
        default_type text/html;
        error_page     404 = /fallback?url=$geta;
    }

    location = /fallback {
        set $redis_host "10.1.102.232";
        set $geta $arg_url;
        set $val "";
        set_md5 $md5 $host$geta;
        content_by_lua_block{
            local redis = require "redis_red"
            local red = redis:new()
            local url = string.gsub(ngx.var.geta, "iask", "miask")
            local res = ngx.location.capture(url);
            --ngx.say(res.status)
            local val = res.body
            red:set(ngx.var.md5, val)
            red:expire(ngx.var.md5, 3600) --缓存时间
            ngx.say(val)
            --ngx.say(url)
        }

    }

    location /miask/ {
        proxy_pass http://127.0.0.1：88/iask/;
        proxy_set_header Host "m.bh.cn";
    }


}

通过ngx_http_reids，将页面缓存的PIKA中。