nginx ngscript 简单使用

备注： 默认没有集成到nginx包里，需要单独安装（推荐使用动态模块的方式进行安装）

1. 安装

wget https://nginx.org/download/nginx-1.13.11.tar.gz

hg clone http://hg.nginx.org/njs // njs 模块克隆

./configure --add-module=path-to-njs/nginx
构建模块
make modules
安装模块
make install

备注：需要一些预备准备  pcre  openssl 

2. 配置加载模块

load_module modules/ngx_http_js_module.so; // 加载模块，注意顺序
#user  nobody;
worker_processes  1;
events {
    worker_connections  1024;
}
http {
    include       mime.types;
    default_type  text/html;

    sendfile        on;
    keepalive_timeout  65;

    #gzip  on;
    server {
        listen       80;
        server_name  localhost;
        location / {
            root   html;
            index  index.html index.htm;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

    }

}

顺序

3. 使用指令

js_include ../js/http.js;

js_set $foo     foo;
js_set $summary summary;

server {
    listen 8000;

    location / {
        add_header X-Foo $foo;
        js_content baz;
    }

    location /summary {
        return 200 $summary;
    }
}

http.js

function foo(req, res) {
    req.log("hello from foo() handler");
    return "foo";
}

function summary(req, res) {
    var a, s, h;

    s = "JS summary\n\n";

    s += "Method: " + req.method + "\n";
    s += "HTTP version: " + req.httpVersion + "\n";
    s += "Host: " + req.headers.host + "\n";
    s += "Remote Address: " + req.remoteAddress + "\n";
    s += "URI: " + req.uri + "\n";

    s += "Headers:\n";
    for (h in req.headers) {
        s += "  header '" + h + "' is '" + req.headers[h] + "'\n";
    }

    s += "Args:\n";
    for (a in req.args) {
        s += "  arg '" + a + "' is '" + req.args[a] + "'\n";
    }

    return s;
}

function baz(req, res) {
    res.headers.foo = 1234;
    res.status = 200;
    res.contentType = "text/plain; charset=utf-8";
    res.contentLength = 15;
    res.sendHeader();
    res.send("nginx");
    res.send("java");
    res.send("script");

    res.finish();
}

4.  测试

sbin/nginx -t
sbin/nginx -s reload

访问测试地址

http://hostip:8000
http://hostip:8000/summary

测试结果

5. 总结

目前来说已经支持了好多es 语法，如果能够更好的集成nodejs模块节能会更好，同时相比openresty 功能上还是太差了，实际使用上，还是openresty 更好

6. 参考资料

https://nginx.org/en/docs/http/ngx_http_js_module.html
https://nginx.org/en/docs/njs_about.html