参考地址：https://github.com/openresty/lua-resty-redis
1。新建nginx配置文件:nginx-openresty-lua-redis.conf
指定配置文件：启动命令
Lua
[root@localhost nginx]# ./sbin/nginx -p ./ -c conf/nginx-openresty-lua-redis.conf
文件内容：
[root@localhost nginx]# cat conf/nginx-openresty-lua-redis.conf
worker_processes 1;
error_log logs/error.log;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 65;
server {
listen 8082;
server_name localhost;
location / {
default_type text/html;
content_by_lua_file /usr/local/openresty/nginx/lua/lua-openresty-redis.lua; }
}
}
文件目录
[root@localhost nginx]# pwd /usr/local/openresty/nginx
[root@localhost nginx]#2。修改lua文件：
Lua
[root@localhost lua]# cat lua-openresty-redis.lua -- 引用resty的redis
local redis = require "resty.redis";
local red = redis:new(); -- 连接redis
local ok,err = red:connect("127.0.0.1",6379); if not ok then
ngx.say("faild to connect",err);
return end
ok,err = red:set("dKey","dValue"); if not ok then
ngx.say("failed to set dKey",err);
return end
ngx.say("dKey set dValue success") return
[root@localhost lua]#
读取redis的key对应的值
[root@localhost lua]# cat lua-openresty-redis.lua -- 引用resty的redis
local redis = require "resty.redis";
local red = redis:new(); -- 连接redis
local ok,err = red:connect("127.0.0.1",6379); if not ok then
ngx.say("faild to connect",err);
return end
ok,err = red:set("dKey","dValue"); if not ok then
ngx.say("failed to set dKey",err);
return end
ok,err = red:get("dKey") if not ok then
ngx.say("dKey is null") else
ngx.say("dKey's value is :"..ok) end
return
[root@localhost lua]#
分析OpenResty响应信息：
目的：为了修改以后的响应信息。
server {
listen 8081; location / {
default_type text/html;
content_by_lua_block {
ngx.say("hi block");
}
}
}获取请求参数信息：
Lua
修改nginx-param.conf
[root@localhost nginx]# ./sbin/nginx -p ./ -c conf/nginx-param.conf
[root@localhost nginx]# cat conf/nginx-param.conf worker_processes 1;
error_log logs/error.log;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
server {
listen 8081; location / {
default_type text/html;
content_by_lua_file /usr/local/openresty/nginx/lua/lua-http-param.lua; }
}
}
[root@localhost nginx]#
lua-http-param.lua
[root@localhost lua]# cat lua-http-param.lua -- 获取get请求的参数
local arg = ngx.req.get_uri_args(); for k,v in pairs(arg)
do
ngx.say("key:",k," value:",v); end
[root@localhost lua]#
结合redis实践一下：
[root@localhost lua]# cat lua-http-param.lua -- 获取get请求的参数
local redis = require "resty.redis";
local red = redis:new();
red:connect("127.0.0.1",6379);
-- 省去链接错误的判断，前面课程中有
local arg = ngx.req.get_uri_args(); for k,v in pairs(arg)
do
ngx.say("key:",k," value:",v);
red:set(k,v); end
[root@localhost lua]#获取请求头参数
Lua
获取http请求中header参数。
lua脚本：
[root@localhost lua]# cat lua-header-param.lua -- 获取header参数
local headers = ngx.req.get_headers(); for k,v in pairs(headers)
do
ngx.say("[header] key:",k," value:",v); end
[root@localhost lua]#
nginx配置修改
[root@localhost conf]# cat nginx-param.conf worker_processes 1;
error_log logs/error.log;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
server {
listen 8081; location / {
default_type text/html;
content_by_lua_file /usr/local/openresty/nginx/lua/lua-header-param.lua;
}
}
}
[root@localhost conf]#获取post body 键值对 参数
bash
nginx配置文件
[root@localhost conf]# cat nginx-param.conf worker_processes 1;
error_log logs/error.log;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
server {
listen 8081; location / {
default_type text/html;
content_by_lua_file /usr/local/openresty/nginx/lua/lua-post-kv-param.lua;
}
}
}
[root@localhost conf]#
lua代码
[root@localhost lua]# cat lua-post-kv-param.lua
-- 获取post body kv参数 -- 重要：读取body
ngx.req.read_body();
local postArgs = ngx.req.get_post_args(); for k,v in pairs(postArgs)
do
ngx.say("[post] key:",k," value:",v); end
[root@localhost lua]#获取body体信息
bash
lua脚本：
[root@localhost lua]# cat lua-post-body-param.lua
-- 获取body体参数
-- 所有获取body的操作，这个很重要 ngx.req.read_body();
local body = ngx.req.get_body_data();
ngx.say(body);
[root@localhost lua]#
nginx配置文件
[root@localhost conf]# cat nginx-param.conf worker_processes 1;
error_log logs/error.log;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
server {
listen 8081; location / {
default_type text/html;
content_by_lua_file /usr/local/openresty/nginx/lua/lua-post-body-param.lua;
}
}
}
[root@localhost conf]#