JDK自带的轻量级HTTP Server进行加载。
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从RESTEasy 2.3开始,加入了一种新的无需Servlet容器的运行方式-通过使用JDK自带的轻量级HTTP Server进行加载。
HttpServer介绍
首先介绍一下JDK中自带的HttpServer,下面是一个例子:
JDK自带的HttpServer是一个非常轻量级的Http服务端框架,但是它非常灵活,易于扩展,组成框架的核心类及框架为:
其中,HttpHandler框架是我们要实现的服务接口:通过处理HttpExchange中包含的Request,Response及各种HTTP协议信息,实现我们的处理逻辑。上面的例子中,在MyHandler中实现了服务器端的处理逻辑:将用户的请求信息打印出来。
最后,通过将HttpServer绑定至服务端口,进行启动:
执行上面的例子,访问:
返回如下:
RESTEasy + HttpServer
从RESTEasy 2.3.3开始,添加了对JDK的HttpSever支持,使得RESTEasy容器可以脱离Servlet容器(比如Tomcat或JBoss),基于HttpSever启动。新的机制主要依赖于:
通过使用RESTEasy新提供的HttpContextBuilder,便可将RESTFul WebService注册进HttpServer。假设我们有resouce如下:
则结合HttpServer的具体调用方式如下:
RESTEasy的这一新模块位于RESTEasy源代码目录中的server-adapters/resteasy-jdk-http子项目:
HttpServer介绍
首先介绍一下JDK中自带的HttpServer,下面是一个例子:
- import com.sun.net.httpserver.Headers;
- import com.sun.net.httpserver.HttpExchange;
- import com.sun.net.httpserver.HttpHandler;
- import com.sun.net.httpserver.HttpServer;
- import java.io.IOException;
- import java.io.OutputStream;
- import java.net.InetSocketAddress;
- import java.util.Iterator;
- import java.util.List;
- import java.util.Set;
- import java.util.concurrent.Executors;
- public class HttpServerDemo {
- public static void main(String[] args) throws IOException {
- InetSocketAddress addr = new InetSocketAddress(8080);
- HttpServer server = HttpServer.create(addr, 0);
- server.createContext("/", new MyHandler());
- server.setExecutor(Executors.newCachedThreadPool());
- server.start();
- System.out.println("Server is listening on port 8080");
- }
- }
- class MyHandler implements HttpHandler {
- public void handle(HttpExchange exchange) throws IOException {
- String requestMethod = exchange.getRequestMethod();
- if (requestMethod.equalsIgnoreCase("GET")) {
- Headers responseHeaders = exchange.getResponseHeaders();
- responseHeaders.set("Content-Type", "text/plain");
- exchange.sendResponseHeaders(200, 0);
- OutputStream responseBody = exchange.getResponseBody();
- Headers requestHeaders = exchange.getRequestHeaders();
- Set<String> keySet = requestHeaders.keySet();
- Iterator<String> iter = keySet.iterator();
- while (iter.hasNext()) {
- String key = iter.next();
- List values = requestHeaders.get(key);
- String s = key + " = " + values.toString() + "\n";
- responseBody.write(s.getBytes());
- }
- responseBody.close();
- }
- }
- }
import com.sun.net.httpserver.Headers;import com.sun.net.httpserver.HttpExchange;import com.sun.net.httpserver.HttpHandler;import com.sun.net.httpserver.HttpServer;import java.io.IOException;import java.io.OutputStream;import java.net.InetSocketAddress;import java.util.Iterator;import java.util.List;import java.util.Set;import java.util.concurrent.Executors;public class HttpServerDemo { public static void main(String[] args) throws IOException { InetSocketAddress addr = new InetSocketAddress(8080); HttpServer server = HttpServer.create(addr, 0); server.createContext("/", new MyHandler()); server.setExecutor(Executors.newCachedThreadPool()); server.start(); System.out.println("Server is listening on port 8080"); }}class MyHandler implements HttpHandler { public void handle(HttpExchange exchange) throws IOException { String requestMethod = exchange.getRequestMethod(); if (requestMethod.equalsIgnoreCase("GET")) { Headers responseHeaders = exchange.getResponseHeaders(); responseHeaders.set("Content-Type", "text/plain"); exchange.sendResponseHeaders(200, 0); OutputStream responseBody = exchange.getResponseBody(); Headers requestHeaders = exchange.getRequestHeaders(); Set<String> keySet = requestHeaders.keySet(); Iterator<String> iter = keySet.iterator(); while (iter.hasNext()) { String key = iter.next(); List values = requestHeaders.get(key); String s = key + " = " + values.toString() + "\n"; responseBody.write(s.getBytes()); } responseBody.close(); } }}
JDK自带的HttpServer是一个非常轻量级的Http服务端框架,但是它非常灵活,易于扩展,组成框架的核心类及框架为:
- com.sun.net.httpserver.HttpExchange;
- com.sun.net.httpserver.HttpHandler;
- com.sun.net.httpserver.HttpServer;
com.sun.net.httpserver.HttpExchange;com.sun.net.httpserver.HttpHandler;com.sun.net.httpserver.HttpServer;
其中,HttpHandler框架是我们要实现的服务接口:通过处理HttpExchange中包含的Request,Response及各种HTTP协议信息,实现我们的处理逻辑。上面的例子中,在MyHandler中实现了服务器端的处理逻辑:将用户的请求信息打印出来。
最后,通过将HttpServer绑定至服务端口,进行启动:
- InetSocketAddress addr = new InetSocketAddress(8080);
- HttpServer server = HttpServer.create(addr, 0);
- server.start();
InetSocketAddress addr = new InetSocketAddress(8080);HttpServer server = HttpServer.create(addr, 0);server.start();
执行上面的例子,访问:
- http://localhost:8080
http://localhost:8080
返回如下:
- Host = [localhost:8080]
- Accept-encoding = [gzip, deflate]
- Connection = [keep-alive]
- Accept-language = [en-us]
- User-agent = [Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/534.55.3 (KHTML, like Gecko) Version/5.1.5 Safari/534.55.3]
- Accept = [text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
Host = [localhost:8080]Accept-encoding = [gzip, deflate]Connection = [keep-alive]Accept-language = [en-us]User-agent = [Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/534.55.3 (KHTML, like Gecko) Version/5.1.5 Safari/534.55.3]Accept = [text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
RESTEasy + HttpServer
从RESTEasy 2.3.3开始,添加了对JDK的HttpSever支持,使得RESTEasy容器可以脱离Servlet容器(比如Tomcat或JBoss),基于HttpSever启动。新的机制主要依赖于:
- org.jboss.resteasy.plugins.server.sun.http.HttpContextBuilder;
org.jboss.resteasy.plugins.server.sun.http.HttpContextBuilder;
通过使用RESTEasy新提供的HttpContextBuilder,便可将RESTFul WebService注册进HttpServer。假设我们有resouce如下:
- @Path("/")
- public class SimpleResource
- {
- @GET
- @Path("basic")
- @Produces("text/plain")
- public String getBasic()
- {
- System.out.println("getBasic()");
- return "basic";
- }
- }
@Path("/")public class SimpleResource{ @GET @Path("basic") @Produces("text/plain") public String getBasic() { System.out.println("getBasic()"); return "basic"; }}
则结合HttpServer的具体调用方式如下:
- InetSocketAddress addr = new InetSocketAddress(8080);
- HttpServer httpServer = HttpServer.create(addr, 0);
- ...
- contextBuilder = new HttpContextBuilder();
- contextBuilder.getDeployment().getActualResourceClasses().add(SimpleResource.class);
- contextBuilder.bind(httpServer);
- ...
- httpServer.start();
InetSocketAddress addr = new InetSocketAddress(8080);HttpServer httpServer = HttpServer.create(addr, 0);...contextBuilder = new HttpContextBuilder();contextBuilder.getDeployment().getActualResourceClasses().add(SimpleResource.class);contextBuilder.bind(httpServer);...httpServer.start();
RESTEasy的这一新模块位于RESTEasy源代码目录中的server-adapters/resteasy-jdk-http子项目:
- https://github.com/resteasy/Resteasy/tree/master/jaxrs/server-adapters/resteasy-jdk-http
https://github.com/resteasy/Resteasy/tree/master/jaxrs/server-adapters/resteasy-jdk-http
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