可编程

NJS

• Source Code - https://github.com/nginx-architects/njs-examples

• Documentation - http://nginx.org/en/docs/njs/

• Step By Step Lab - https://clouddocs.f5.com/training/community/nginx/html/class3/class3.html

Run NJS From CLI

$ docker run -it --rm --name nginx nginx njs
interactive njs 0.5.3

v.<Tab> -> the properties and prototype methods of v.

>> function hi(msg) {console.log(msg)}
undefined
>> hi("Test From Kylin")
Test From Kylin
undefined

Hello World

docker run -it --rm --name nginx-njs -v $(pwd)/conf/http/hello.conf:/etc/nginx/nginx.conf:ro -v $(pwd)/njs/:/etc/nginx/njs/:ro -p 80:80 -d nginx

$ curl localhost
Hello world!

$ curl localhost/version
0.5.3

3. Configuration & Code

load_module modules/ngx_http_js_module.so;

events { }

http {
      js_path "/etc/nginx/njs/";

      js_import utils.js;
      js_import main from http/hello.js;

      server {
            listen 80;

            location = /version {
                js_content utils.version;
            }

            location / {
                js_content main.hello;
            }
      }
}

function version(r) {
    r.return(200, njs.version);
}

export default {version}

function hello(r) {
    r.return(200, "Hello world!\n");
}

export default {hello}

Decode URI

docker run -it --rm --name nginx-njs -v $(pwd)/conf/http/decode_uri.conf:/etc/nginx/nginx.conf:ro -v $(pwd)/njs/:/etc/nginx/njs/:ro -p 80:80 -d nginx

$ curl -G http://localhost/foo --data-urlencode "foo=你好"
%E4%BD%A0%E5%A5%BD

$ curl -G http://localhost/dec_foo -d "foo=%E4%BD%A0%E5%A5%BD"
你好

3. Configuration & Code

load_module modules/ngx_http_js_module.so;

events { }

http {
      js_path "/etc/nginx/njs/";

      js_import utils.js;
      js_import main from http/decode_uri.js;

      js_set $dec_foo main.dec_foo;

      server {
            listen 80;

            location /version {
                js_content utils.version;
            }

            location /foo {
                return 200 $arg_foo;
            }

            location /dec_foo {
                return 200 $dec_foo;
            }
      }
}

function dec_foo(r) {
    return decodeURIComponent(r.args.foo);
}

export default {dec_foo};

JWT

docker run -it --rm --name nginx-njs -v $(pwd)/conf/http/authorization/jwt.conf:/etc/nginx/nginx.conf:ro -v $(pwd)/njs/:/etc/nginx/njs/:ro -p 80:80 -d nginx

$ curl 'http://localhost/jwt' -H "Authorization: Bearer eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiIsImV4cCI6MTU4NDcyMzA4NX0.eyJpc3MiOiJuZ2lueCIsInN1YiI6ImFsaWNlIiwiZm9vIjoxMjMsImJhciI6InFxIiwienl4IjpmYWxzZX023Rvv9dIso1RuZ8uHaJ83BkKmMtTwch09rJtwgk"
alice

Subrequests join

docker run -it --rm --name nginx-njs -v $(pwd)/conf/http/join_subrequests.conf:/etc/nginx/nginx.conf:ro -v $(pwd)/njs/:/etc/nginx/njs/:ro -p 80:80 -d nginx

$ curl http://localhost/foo
FOO

$ curl http://localhost/bar
BAR

$ curl http://localhost/join
[{"uri":"/foo","code":200,"body":"FOO"},{"uri":"/bar","code":200,"body":"BAR"}]

TD