[nginx]-nginx使用lua模块处理和转发post请求

曾经终败给现在 2023-03-02 05:14 102阅读 0赞

安装LuaJIT

cd /opt
    wget http://luajit.org/download/LuaJIT-2.0.2.tar.gz
    tar -xvf LuaJIT-2.0.2.tar.gz
    cd LuaJIT-2.0.2
    make install
    
    # 下面这条解决找不到libluajit-5.1.so.2的报错
    ln -s /usr/local/lib/libluajit-5.1.so.2 /usr/lib/

安装nginx

wget https://github.com/simpl/ngx_devel_kit/archive/v0.3.0.tar.gz
    wget https://github.com/openresty/lua-nginx-module/archive/v0.10.9rc7.tar.gz
    wget http://nginx.org/download/nginx-1.14.0.tar.gz 
    
    tar -xvf v0.3.0.tar.gz
    tar -xvf v0.10.9rc7.tar.gz
    tar -xvf nginx-1.14.0.tar.gz
    
    cd nginx-1.14.0
    ./configure --prefix=/usr/local/nginx --add-module=../ngx_devel_kit-0.3.0 --add-module=../lua-nginx-module-0.10.9rc7  --with-http_ssl_module  --with-http_stub_status_module  --with-http_gzip_static_module
    
    make && make install
    mkdir -p /usr/local/nginx/lua
    /usr/local/nginx/sbin/nginx

安装lua

cd /opt
    yum install libtermcap-devel ncurses-devel libevent-devel readline-devel -y 
    wget http://www.lua.org/ftp/lua-5.1.4.tar.gz
    tar -xzvf lua-5.1.4.tar.gz
    cd lua-5.1.4
    make linux test
    make && make install

安装lua-cjson

5.1和5.3的Makefile生成文件差很多 踩坑了

cd /opt
    wget http://www.kyne.com.au/~mark/software/download/lua-cjson-2.1.0.tar.gz
    tar zxvf lua-cjson-2.1.0.tar.gz
    cd lua-cjson-2.1.0
    cmake CMakeLists.txt
    make
    make install

5.1的Makefile 如下

![format_png][]

修改nginx.conf如下

worker_processes  1;
    events {
        worker_connections  1024;
    }
    http {
        include       mime.types;
        default_type  application/octet-stream;
        sendfile        on;
        keepalive_timeout  65;
        server {
            listen       80;
            server_name  localhost;
            location / {
               proxy_pass http://127.0.0.1:8085;
            }
            location /hello{
            default_type 'text/plain';
            content_by_lua 'ngx.say("hello,lua")';
            }
             location /lua {
                 content_by_lua_file "/usr/local/nginx/lua/dispatch.lua";
             }
            location @lua_api_suc {
    		 content_by_lua_block {
                  ngx.say("转发端口8085")
             }
             }
            location @lua_api_err {
             content_by_lua_block {
                  ngx.exec("/")
             }
            }
        }
    }

创建/usr/local/nginx/lua/dispatch.lua如下

local request_method = ngx.var.request_method
    local arg=nil
    if request_method == "GET" then
             arg = ngx.req.get_uri_args()
    elseif request_method == "POST" then
             ngx.req.read_body()
             arg = ngx.req.get_post_args()
    end
    
    ngx.req.read_body()
    local data = ngx.req.get_body_data()
    
    local cjson = require("cjson")
    local json = cjson.decode(data)
    for k,v in pairs(json) do
        ngx.say("参数输出--")
        ngx.say(k..":"..v)
    end
    local ip = json["ip"]
    --ngx.say("获取到的ip：",ip)
    
    if ip ~= nil and ip == '8085' then
    --    ngx.say("进入ip=8085")
    --    ngx.exec('@lua_api_suc')
        ngx.say("参数输出111--")
    else
    --    ngx.exec('@lua_api_err')
        ngx.say("参数输出222--")
    end

reload配置

/usr/local/nginx/sbin/nginx -s reload

使用postman模拟post请求 发送json类型的数据

{
        "ip":"8085"
    }

![format_png 1][]

![format_png 2][]

修改dispatch.lua 如下 修改注释的配置

local request_method = ngx.var.request_method
    local arg=nil
    if request_method == "GET" then
             arg = ngx.req.get_uri_args()
    elseif request_method == "POST" then
             ngx.req.read_body()
             arg = ngx.req.get_post_args()
    end
    
    ngx.req.read_body()
    local data = ngx.req.get_body_data()
    
    local cjson = require("cjson")
    local json = cjson.decode(data)
    --for k,v in pairs(json) do
     --   ngx.say("参数输出--")
    --    ngx.say(k..":"..v)
    --end
    local ip = json["ip"]
    --ngx.say("获取到的ip：",ip)
    
    if ip ~= nil and ip == '8085' then
    --    ngx.say("进入ip=8085")
        ngx.exec('@lua_api_suc')
    --    ngx.say("参数输出111--")
    else
        ngx.exec('@lua_api_err')
    --    ngx.say("参数输出222--")
    end

![format_png 3][]

如果需要转发http请求 nginx.conf可能需要修改成如下

worker_processes  1;
    events {
        worker_connections  1024;
    }
    http {
        include       mime.types;
        default_type  application/octet-stream;
        sendfile        on;
        keepalive_timeout  65;
        server {
            listen       80;
            server_name  localhost;
            location /hello{
            default_type 'text/plain';
            content_by_lua 'ngx.say("hello,lua")';
            }
             location / {
                 content_by_lua_file "/usr/local/nginx/lua/dispatch.lua";
             }
            location @lua_api_suc {
    proxy_pass http://localhost:8080;
             }
            location @lua_api_err {
    proxy_pass http://localhost:8080;
             }
        }
    }

![format_png 4][]

[format_png]: /images/20230208/f07be921c44a4a30a24e7b35799784fa.png
[format_png 1]: /images/20230208/d70684a4bd204a0bbad5bea6239ba1e3.png
[format_png 2]: /images/20230208/b07fd3bcedd4474f821338dcbebdaffe.png
[format_png 3]: /images/20230208/ba2047be2a9c4e0e8d895b14bf75cf48.png
[format_png 4]: /images/20230208/4e10e90c50744d4cae4527fb946abe89.png