用 Java 扩展 Nginx（nginx-clojure 入门实战）

./nginx -vnginx version: nginx/1.18.0

<repositories>  <repository>    <id>clojars.org</id>    <url>http://clojars.org/repo</url>    </repository></repositories>
<dependencies>  <dependency>    <groupId>nginx-clojure</groupId>    <artifactId>nginx-clojure</artifactId>    <version>0.5.2</version>  </dependency></dependencies>

package com.bolingcavalry.simplehello;
import nginx.clojure.java.ArrayMap;import nginx.clojure.java.NginxJavaRingHandler;
import java.time.LocalDateTime;import java.util.Map;
import static nginx.clojure.MiniConstants.CONTENT_TYPE;import static nginx.clojure.MiniConstants.NGX_HTTP_OK;
/** * @author zq2599@gmail.com * @Title: 产生内容的handler * @Package * @Description: * @date 2/1/22 12:41 PM */public class HelloHandler implements NginxJavaRingHandler {
    @Override    public Object[] invoke(Map<String, Object> request) {        return new Object[] {                NGX_HTTP_OK, //http status 200                ArrayMap.create(CONTENT_TYPE, "text/plain"), //headers map                "Hello, Nginx clojure! " + LocalDateTime.now()  //response body can be string, File or Array/Collection of them        };    }}

location /java {         content_handler_type 'java';         content_handler_name 'com.bolingcavalry.simplehello.HelloHandler';}

###you can uncomment next two lines for easy debug###Warning: if master_process is off, there will be only one nginx worker running. Only use it for debug propose.
#daemon  off;
#master_process  off;
#user  nobody;worker_processes  1;
#error_log  logs/error.log;#error_log  logs/error.log  notice;#error_log  logs/error.log  info;
#pid        logs/nginx.pid;

events {    worker_connections  1024;}

http {    include       mime.types;    default_type  application/octet-stream;
    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '    #                  '$status $body_bytes_sent "$http_referer" '    #                  '"$http_user_agent" "$http_x_forwarded_for"';
    #access_log  logs/access.log  main;
    sendfile        on;    #tcp_nopush     on;
    #keepalive_timeout  0;    keepalive_timeout  65;
    #gzip  on;    
    jvm_path auto;        ### Set my app jars and resources, it must include nginx-clojure runtime jar,e.g. nginx-clojure-0.5.1.jar and     ### for clojure user clojure runtime jar is also needed.    ### See http://nginx-clojure.github.io/directives.html#jvm_classpath    jvm_classpath "libs/*:jars/*";        ###jvm heap memory    #jvm_options "-Xms1024m";    #jvm_options "-Xmx1024m";        #for enable java remote debug uncomment next two lines    #jvm_options "-Xdebug";    #jvm_options "-Xrunjdwp:server=y,transport=dt_socket,address=840#{pno},suspend=n";
    ###threads number for request handler thread pool on jvm, default is 0.     ###check more details from     #jvm_workers 8;
    server {        listen       8080;        server_name  localhost;
        #charset koi8-r;
        #access_log  logs/host.access.log  main;
        location / {            root   html;            index  index.html index.htm;        }
        #error_page  404              /404.html;
        # redirect server error pages to the static page /50x.html        #        error_page   500 502 503 504  /50x.html;        location = /50x.html {            root   html;        }
       location /clojure {          handler_type 'clojure';          handler_code ' 						(fn[req]						  {						    :status 200,						    :headers {"content-type" "text/plain"},						    :body  "Hello Clojure & Nginx!" 						    })          ';       }
       location /java {         content_handler_type 'java';         content_handler_name 'com.bolingcavalry.simplehello.HelloHandler';       }       #      location /groovy {#          handler_type 'groovy';#          handler_code ' #               import nginx.clojure.java.NginxJavaRingHandler;#               import java.util.Map;#               public class HelloGroovy implements NginxJavaRingHandler {#                  public Object[] invoke(Map<String, Object> request){#                     return [200, //http status 200#                             ["Content-Type":"text/html"], //headers map#                             "Hello, Groovy & Nginx!"]; //response body can be string, File or Array/Collection of them#                  }#               }#          ';#       }#             }}

2022/02/02 17:45:07 [emerg] 27703#0: bind() to 0.0.0.0:8080 failed (48: Address already in use)2022/02/02 17:45:07 [emerg] 27703#0: bind() to 0.0.0.0:8080 failed (48: Address already in use)2022/02/02 17:45:07 [emerg] 27703#0: bind() to 0.0.0.0:8080 failed (48: Address already in use)2022/02/02 17:45:07 [emerg] 27703#0: bind() to 0.0.0.0:8080 failed (48: Address already in use)2022/02/02 17:45:07 [emerg] 27703#0: bind() to 0.0.0.0:8080 failed (48: Address already in use)2022/02/02 17:45:07 [emerg] 27703#0: still could not bind()