openresty-lua-redis案例
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
[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.confworker_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:
[root@localhost lua]# cat lua-openresty-redis.lua -- 引用resty的redislocal redis = require "resty.redis";local red = redis:new(); -- 连接redislocal ok,err = red:connect("127.0.0.1",6379); if not ok thenngx.say("faild to connect",err);return endok,err = red:set("dKey","dValue"); if not ok thenngx.say("failed to set dKey",err);return endngx.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redislocal redis = require "resty.redis";local red = redis:new(); -- 连接redislocal ok,err = red:connect("127.0.0.1",6379); if not ok thenngx.say("faild to connect",err);return endok,err = red:set("dKey","dValue"); if not ok thenngx.say("failed to set dKey",err);return endok,err = red:get("dKey") if not ok thenngx.say("dKey is null") elsengx.say("dKey's value is :"..ok) endreturn[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:
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)dongx.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)dongx.say("key:",k," value:",v);red:set(k,v); end[root@localhost lua]#
获取请求头参数
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)dongx.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
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bodyngx.req.read_body();local postArgs = ngx.req.get_post_args(); for k,v in pairs(postArgs)dongx.say("[post] key:",k," value:",v); end[root@localhost lua]#
获取body体信息
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]#