nginx+lua+redis 实现短链接转发长链接

任锦

nginx 中间件使用场景应用场景

发布于：Mar 11, 2019

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nginx + lua + redis 实现短链接转发长链接

重新编译安装 nginx 及相关依赖

安装相关依赖包

#  yum -y install gcc zlib zlib-devel pcre-devel openssl openssl-devel  lua-devel luajit-devel pcre pcre-devel libxml2 libxml2-dev libxslt-devel gd-devel perl-devel perl-ExtUtils-Embed  GeoIP GeoIP-devel GeoIP-data gperftools

下载nginx_devel_kit lua-nginx-module

#  wget https://github.com/simplresty/ngx_devel_kit/archive/master.zip
#  wget https://github.com/openresty/lua-nginx-module/archive/v0.10.13.tar.gz
#  unzip master.zip && mv ngx_devel_kit-master/ /usr/local/
#  tar -xvf v0.10.13.tar.gz  -C /usr/local/

重新安装 nginx

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# cd /usr/local/src/nginx-1.12.2
# ./configure --prefix=/usr/share/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib64/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --http-client-body-temp-path=/var/lib/nginx/tmp/client_body --http-proxy-temp-path=/var/lib/nginx/tmp/proxy --http-fastcgi-temp-path=/var/lib/nginx/tmp/fastcgi --http-uwsgi-temp-path=/var/lib/nginx/tmp/uwsgi --http-scgi-temp-path=/var/lib/nginx/tmp/scgi --pid-path=/run/nginx.pid --lock-path=/run/lock/subsys/nginx --user=nginx --group=nginx --with-file-aio --with-ipv6 --with-http_auth_request_module --with-http_ssl_module --with-http_v2_module --with-http_realip_module --with-http_addition_module --with-http_xslt_module=dynamic --with-http_image_filter_module=dynamic --with-http_geoip_module=dynamic --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_random_index_module --with-http_secure_link_module --with-http_degradation_module --with-http_slice_module --with-http_stub_status_module --with-http_perl_module=dynamic --with-mail=dynamic --with-mail_ssl_module --with-pcre --with-pcre-jit --with-stream=dynamic --with-stream_ssl_module --with-google_perftools_module --with-debug --with-cc-opt='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic' --with-ld-opt='-Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -Wl,-E' --add-module=/usr/local/lua-nginx-module-0.10.13 --add-module=/usr/local/ngx_devel_kit-master
# make  && make install

安装lua-resty-redis

# cd /usr/local/src
# wget https://github.com/openresty/lua-resty-redis/archive/master.zip
# unzip master.zip
# cd lua-resty-redis-master/
# make && make install
make: Nothing to be done for `all'.
install -d /usr/local/lib/lua//resty
install lib/resty/*.lua /usr/local/lib/lua//resty

修改nginx http 段内配置文件

http内添加 lua_package_path "/usr/local/lib/lua/?.lua;;";
;; 代表的是LuaJIT安装时的原始搜索路径

1	# nginx -t && nginx -s reload

修改nginx server或location 字段

location /lua {
       default_type text/plain;
       content_by_lua_file /usr/local/lua/request.lua;
     }

request.lua

# vim /usr/local/lua/request.lua
local redis = require "resty.redis"
local cache = redis:new()
-- redis连接
local ok,err = cache.connect(cache, '127.0.0.1', '25612')

if not ok then
    ngx.say("failed to connect redis cache:", err);
    return
end

-- redis认证
local count
count, err = cache:get_reused_times()
if 0 == count then
    ok,err = cache:auth("xxxxx")
    if not ok then
        ngx.say("failed to auth redis: " , err)
        return
    end
elseif err then
    ngx.say("failed to get reused times: ", err)
    return
end
-- 选择使用的redis数据库
cache:select(7)
-- 当前访问地址

local url = ngx.var.uri

--  主机名
local host = ngx.var.host

-- 链接参数

local args = ngx.var.args

-- 获取方法
local sch =ngx.var.scheme

-- 获取端口
--local pot =ngx.var.server_port


-- 定义通用完整 url 路径
local url_full_path = sch .. "://" .. host .. url

-- 获取redis 中的值
local res, err = cache:get(url_full_path)
-- ngx.req.set_uri(url)
if res then
   --ngx.say(sch .. "://" .. host .. url .. " " .. res)
   ngx.redirect(res,302)
end
# nginx -s reload

在redis 写入key 并测试

# redis-cli -h 127.0.0.1 -p 25612
127.0.0.1:25612> AUTH xxxxxxxxxx
OK
127.0.0.1:25612> SELECT 7
OK
127.0.0.1:25612[7]> set https://www.ssjinyao.com/lua/test https://www.ssjinyao.com/2019/03/16/%E5%85%B3%E4%BA%8E%E6%9F%90%E7%B3%BB%E7%BB%9F%E9%98%B5%E5%8F%91%E6%80%7%E7%BD%91%E7%BB%9C%E5%A4%84%E7%90%86/
OK