openresty引入Lua源码

分类: 源代码 > Lua

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 /var/data/index.lua; # content_by_lua_file:调用lua脚本
 }

/var/data/index.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 /var/data/002.lua; # content_by_lua_file:调用lua脚本

 /var/data/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 /var/data/003.lua;
 }

/var/data/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
   }
}

 获取多个变量:

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

 7. 获取请求头的信息

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

8. 根据不同路径访问不同的lua文件

location ~^/lapi/([^/]+)$ {
    lua_code_cache off;
    access_by_lua 'package.path = string.format("%s?.lua;%s", "/home/lua/", package.path)';
    content_by_lua_file /diska/htdocs/i56/openresty/api/$1.lua;
}
来源:原创 发布时间:2022-06-12 14:54:00