以下配置均在/usr/local/openresty/nginx/conf/nginx.conf中配置，涉及到的lua脚本均创建在/usr/local/openresty/nginx/conf
1. localtion下直接写lua脚本：content_by_lua
location /lua {
default_type text/html; #响应内容为html解析
content_by_lua 'ngx.say("<br>hello world ! welcome to openresty!</br>")'; # content_by_lua：调用lua脚本
}2. 调用lua脚本文件：content_by_lua_file
location /lua1 {
default_type text/html; #响应内容为html解析
content_by_lua_file conf/001.lua; # content_by_lua_file：调用lua脚本
}001.lua脚本内容：
ngx.say("<br>hello world ! welcome to openresty!</br>")
3. 调用lua脚本文件：include
location /lua2 {
default_type text/html; #响应内容为html解析
include lua.conf; # include ：调用lua脚本
}?lua.conf脚本：
content_by_lua_file conf/002.lua; # content_by_lua_file：调用lua脚本
?002.lua脚本：
ngx.say("<br>hello world ! welcome to openresty! i am lua2</br>")4. 调用lua脚本：content_by_lua_block
location /lua3 {
default_type text/html; #响应内容为html解析
content_by_lua_block {
ngx.say("<br>hello world ! welcome to openresty! i am content_by_lua_block </br>")
}
}5. 直接配置在nginx.conf的server下配置：include lua1.conf;
include lua1.conf;lua1.conf脚本：
location /lua4 {
default_type text/html; #响应内容为html解析
content_by_lua_file conf/003.lua;
}
003.lua脚本：
ngx.say("<br>hello world ! welcome to openresty! i am lua4</br>")
6. nginx中uri变量获取
获取单个变量：
location /lua5 {
default_type text/html; #响应内容为html解析
content_by_lua_block {
ngx.say(ngx.var.arg_username) #ngx对象中->变量->参数->_下划线为语法->username为url请求参数名
}
}请求：http://10.4.xx.xx/lua5?username=jllasdfasdfsadf
?获取多个变量：
006.lua脚本：
local uri_args = ngx.req.get_uri_args()
for k,v in pairs(uri_args) do
if type(v) == "table" then
ngx.say(k," : ",table.concat(v,","),"<br/>") #table：lua中的表，类似于数组。如：get请求中有多个同名参数不同值的，会通过这个函数来处理
else
ngx.say(k," : ",v,"<br/>")
end
end?nginx.conf中配置：
location /lua6 {
default_type text/html; #响应内容为html解析
content_by_lua_file conf/006.lua;
}请求：http://10.4.xx.xx/lua6?username=jll&school=xxSchool&age=18&class=math&class=eglish&class=java
?7. 获取请求头的信息
007.lua脚本：
local headers = ngx.req.get_headers()
ngx.say("Host : ", headers["Host"], "<br/>")
ngx.say("user-agent : ", headers["user-agent"], "<br/>")
ngx.say("user-agent : ", headers.user_agent, "<br/>")
ngx.say("-------------------------------------------","<br/>")
for k,v in pairs(headers) do
if type(v) == "table" then
ngx.say(k," : ",table.concat(v,","),"<br/>")
else
ngx.say(k," : ",v,"<br/>")
end
end?nginx.conf脚本：
location /lua7 {
default_type text/html; #响应内容为html解析
content_by_lua_file conf/007.lua;
}