嵌入式运行HttpServer

一、嵌入式运行Jetty并提供上传文件功能
1、定义处理请求的Handler

public class DispatchRequestHandler extends AbstractHandler {

	public void handle(String target, Request baseRequest,
			HttpServletRequest request, HttpServletResponse response)
			throws IOException, ServletException {
		request.setCharacterEncoding("UTF-8");
		response.setContentType("text/html;charset=utf-8");
		response.setHeader("Cache-Control", "no-cache");
		response.setStatus(HttpServletResponse.SC_OK);
		baseRequest.setHandled(true);
		if(target.contains("/upload")){//process file upload
			processUploadFileRequest(request, response);
		}else{//other request
			response.getWriter().println("<h1>Hello World</h1>");
			response.getWriter().println("<li>Request url: " + target + "</li>");
			response.getWriter().println("<li>Server port: " + request.getServerPort() + "</li>");
		}
	}

	private void processUploadFileRequest(HttpServletRequest request, HttpServletResponse response){
		try{
			String uploadPath = "D:/upload";
			File uploadFolder = new File(uploadPath);
			if(!uploadFolder.exists()){
				uploadFolder.mkdirs();
			}
			boolean isMultipart = ServletFileUpload.isMultipartContent(request);
			if(!isMultipart){
				throw new Exception("not file upload request!");
			}
			DiskFileItemFactory factory = new DiskFileItemFactory();
			//factory.setSizeThreshold(4094);
			//factory.setRepository(new File("D:/temp/buffer"));
			ServletFileUpload upload = new ServletFileUpload(factory);
			upload.setSizeMax(10*1024*1024);
			
			FileItemIterator iter = upload.getItemIterator(request);
			while (iter.hasNext()) {
				FileItemStream item = iter.next();
				String name = item.getFieldName();
				InputStream stream = item.openStream();
				if (item.isFormField()) {
					System.out.println("Form field " + name + " with value " + Streams.asString(stream) + " detected.");
				} else {
					System.out.println("File field " + name + " with file name " + item.getName() + " detected.");
					File savedFile = new File(uploadPath, item.getName());
					FileOutputStream fos = new FileOutputStream(savedFile);
					byte[] buff = new byte[1024];
					int len = 0;
					while((len = stream.read(buff)) > 0){
						fos.write(buff, 0, len);
					}
					fos.close();
				}
			}	
			/*
			List<FileItem> items = upload.parseRequest(request);
			Iterator<FileItem> it = items.iterator();
			while(it.hasNext()){
				FileItem item = (FileItem)it.next();
				if(item.isFormField()){
					System.out.print(item.getFieldName()+"="+item.getString());
				}else{
					String fileName = item.getName();
					//item.getInputStream();
					System.out.println(fileName);
					if(fileName != null){
						File savedFile = new File(uploadPath, fileName);
						item.write(savedFile);	
					}
				}
			}
			*/
			response.getWriter().println("1");//success
		}catch(Exception e){
			e.printStackTrace();
			try{
				response.getWriter().println("0");//fail
			}catch(Exception ex){}
		}
	}
	
}

2、嵌入式运行Jetty

public class MainEntrance {

	public static void main(String[] args){
		Server server = new Server();//jetty server
		SelectChannelConnector connector_1 = new SelectChannelConnector();
		connector_1.setPort(8088);
		SelectChannelConnector connector_2 = new SelectChannelConnector();
		connector_2.setPort(8089);		
		server.setConnectors(new Connector[]{connector_1,connector_2});
		server.setHandler(new DispatchRequestHandler());
		
		try {
			server.start();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
}

3、用HttpClient上传文件进行测试

public class TestUpload {

	public static void main(String[] args) {
		String targetURL = "http://127.0.0.1:8088/upload";
		File uploadFile = new File("D:/test/IMG_5352.JPG");
		HttpClient httpClient = new DefaultHttpClient();//apache httpClient
		HttpPost httpPost = new HttpPost(targetURL);
		
		try {
			FileBody fileBody = new FileBody(uploadFile);
			StringBody comment = new StringBody("测试上传文件",Charset.forName("UTF-8"));
	
			MultipartEntity multipartEntity = new MultipartEntity();
			multipartEntity.addPart("upload", fileBody);
			multipartEntity.addPart("comment", comment);
			httpPost.setEntity(multipartEntity);
			
			HttpResponse response = httpClient.execute(httpPost);
			int statusCode = response.getStatusLine().getStatusCode();
			if(statusCode == HttpStatus.SC_OK){ 
				HttpEntity resEntity = response.getEntity();   
				System.out.println(EntityUtils.toString(resEntity));
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				httpClient.getConnectionManager().shutdown();
			} catch (Exception ignore) {

			}
		}

	}

}

二、JDK6自带的HttpServer
1.Server端

public class JDK6HTTPServer {

	public static void run(){
		try{
			HttpServerProvider provider = HttpServerProvider.provider(); 
			HttpServer httpServer = provider.createHttpServer(new InetSocketAddress(80),100);//concurrent request 100
			httpServer.createContext("/", new JDK6HTTPServer().new JDK6HTTPServerHandler());
			httpServer.setExecutor(null);//creates a default executor
			httpServer.start();
			System.out.println("JDK6HTTPServer started...");
		}catch(Exception e){
			
		}
	}
	
	public class JDK6HTTPServerHandler implements HttpHandler{
		public void handle(HttpExchange httpExchange) throws IOException {
			//System.out.println(httpExchange.getRequestURI());
			InputStream inputStrean = httpExchange.getRequestBody();
			BufferedReader reader = new BufferedReader(new InputStreamReader(inputStrean)); 
			String temp = null;  
            while((temp = reader.readLine()) != null){
                System.out.println("client request:"+temp);  
            }
			
			StringBuffer buff = new StringBuffer();
			buff.append("<h1>Hello World</h1>");
			httpExchange.sendResponseHeaders(200, buff.toString().getBytes().length);
			OutputStream outputStream = httpExchange.getResponseBody();    
			outputStream.write(buff.toString().getBytes());    
			outputStream.close();			
		}
	}
	
	public static void main(String[] args){
		run();
	}
	
}

2.client端测试

public class TestJDK6HTTPServer {

	public static void requestServer(){
		try{
	        URL url = new URL("http://127.0.0.1");  
	        HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();  
	        urlConn.setDoOutput(true);  
	        urlConn.setDoInput(true);  
	        urlConn.setRequestMethod("POST");  
	       
	        String msg = "测试内容";  
	        OutputStream out = urlConn.getOutputStream();  
	        out.write(msg.getBytes());  
	        out.flush();  
	        if(urlConn.getContentLength() != -1 && urlConn.getResponseCode() == 200) {  
                InputStream in = urlConn.getInputStream();  
                BufferedReader reader = new BufferedReader(new InputStreamReader(in));  
                String temp = "";  
                while ((temp = reader.readLine()) != null) {  
                    System.err.println("server response:" + temp);
                }  
                reader.close();  
                in.close();  
                urlConn.disconnect();  
	        }  
		}catch(Exception e){
			e.printStackTrace();
		}
	}
	
	public static void main(String[] args){
		ExecutorService exec = Executors.newCachedThreadPool();
		for (int i = 0; i < 20; i++) {  
            Runnable run = new Runnable() {  
                public void run() {  
                	requestServer();  
                }  
            };  
            exec.execute(run);  
        }  
        exec.shutdown();
	}
	
}