uodate njs

nginx启用njs动态修改请求.md

@@ -0,0 +1,164 @@
+### nginx 使用njs模块动态修改请求
+
+
+
+##### 安装编译环境 
+
+```bash
+    #GCC
+    apt install -y build-essential
+
+    #安装正则库
+    apt install -y libpcre3 libpcre3-dev
+
+    #安装zlib库
+    apt install -y zlib1g-dev
+
+    #openssl
+    apt install -y openssl libssl-dev
+
+```
+
+
+
+##### 下载源码
+
+```
+
+# 创建源码目录
+mkdir -p ~/build && cd ~/build
+
+# 下载最新稳定版 Nginx
+wget https://nginx.org/download/nginx-1.24.0.tar.gz
+tar -zxvf nginx-1.24.0.tar.gz
+
+# 下载 njs 模块
+wget https://github.com/nginx/njs/archive/refs/tags/0.7.11.tar.gz -O njs-0.7.11.tar.gz
+tar -zxvf njs-0.7.11.tar.gz
+
+```
+
+
+
+
+
+##### 编译
+这里采用最小化 默认配置编译
+
+```
+cd ~/build/nginx-1.24.0
+```
+
+```
+./configure \
+    --with-http_ssl_module \
+    --with-http_v2_module \
+    --with-http_realip_module \
+    --with-http_gzip_static_module \
+    --add-module=../njs-0.7.11/nginx
+
+```
+```
+make && make install
+```
+
+
+##### 配置
+
+编辑conf/nginx.conf
+```
+
+
+worker_processes 1;
+events {
+
+    worker_connections 1024;
+}
+
+
+http {
+
+    include mime.types;
+    default_type application/octet-stream;
+
+    sendfile on;
+
+    keepalive_timeout 65;
+
+    include /usr/local/nginx/conf.d/*.conf;
+    include /usr/local/nginx/sites-enabled/*;
+}
+
+```
+
+ 创建子配置目录
+
+```
+mkdir /usr/local/nginx/{conf.d,sites-enabled}
+
+
+```
+编辑子配置
+
+```
+
+js_import /usr/local/nginx/test.js;
+
+server {
+    listen 80;
+    location / {
+        root html;
+        index index.html index.htm;
+    }
+
+    location /njs {
+        return 200 test.version;
+    }
+
+    location /hello {
+        js_content test.hello;
+    }
+
+
+    error_page 500 502 503 504 /50x.html;
+    location = /50x.html {
+
+        root html;
+    }
+}
+
+```
+
+编辑js 脚本
+```
+function hello(r) {
+    r.return(200, "Hello from njs!\n");
+}
+
+export default {hello, version: "1.0.0"};
+```
+
+
+##### 访问测试
+
+测试配置是否正确
+
+```
+ sbin/nginx -t  
+
+```
+
+启动nginx 
+```
+ sbin/nginx 
+
+```
+
+访问测试
+```
+[root@cdh-node-3 nginx]# curl 127.0.0.1:80/njs
+test.version[root@cdh-node-3 nginx]# curl 127.0.0.1:80/hello
+Hello from njs!
+
+```
+