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Apache Commons HttpCore项目怎么样?

来自网站:…… HttpCore目标

实现最基本的HTTP传输方面 良好的表现和清晰的表达之间的平衡 API 小(可预测的)内存占用 自包含库(没有JRE以外的外部依赖)

从Java SE 6开始，在Sun Oracle JRE中有一个内置的HTTP服务器。Java 9模块名称为jdk.httpserver。httpserver包摘要概述了涉及的类并包含示例。

这里有一个从他们的文档复制粘贴的启动示例。你可以复制，粘贴，然后在Java 6+上运行。 (尽管如此，所有试图编辑它的人，因为它是一段丑陋的代码，请不要，这是一个复制粘贴，不是我的，此外，你不应该编辑引文，除非它们在原始来源中发生了变化)

package com.stackoverflow.q3732109; import java.io.IOException; import java.io.OutputStream; import java.net.InetSocketAddress; import com.sun.net.httpserver.HttpExchange; import com.sun.net.httpserver.HttpHandler; import com.sun.net.httpserver.HttpServer; public class Test { public static void main(String[] args) throws Exception { HttpServer server = HttpServer.create(new InetSocketAddress(8000), 0); server.createContext("/test", new MyHandler()); server.setExecutor(null); // creates a default executor server.start(); } static class MyHandler implements HttpHandler { @Override public void handle(HttpExchange t) throws IOException { String response = "This is the response"; t.sendResponseHeaders(200, response.length()); OutputStream os = t.getResponseBody(); os.write(response.getBytes()); os.close(); } } }

应该注意的是，他们示例中的response.length()部分是坏的，它应该是response.getBytes().length。即使这样，getBytes()方法也必须显式地指定在响应头中指定的字符集。唉，尽管对初学者有误导，但毕竟这只是一个基本的启动示例。

执行它并访问http://localhost:8000/test，你将看到以下响应:

这是反应

As to using com.sun.* classes, do note that this is, in contrary to what some developers think, absolutely not forbidden by the well known FAQ Why Developers Should Not Write Programs That Call 'sun' Packages. That FAQ concerns the sun.* package (such as sun.misc.BASE64Encoder) for internal usage by the Oracle JRE (which would thus kill your application when you run it on a different JRE), not the com.sun.* package. Sun/Oracle also just develop software on top of the Java SE API themselves like as every other company such as Apache and so on. Moreover, this specific HttpServer must be present in every JDK so there is absolutely no means of "portability" issue like as would happen with sun.* package. Using com.sun.* classes is only discouraged (but not forbidden) when it concerns an implementation of a certain Java API, such as GlassFish (Java EE impl), Mojarra (JSF impl), Jersey (JAX-RS impl), etc.

看看“Jetty”web服务器Jetty。一流的开源软件，似乎可以满足您的所有要求。

如果你坚持要创建自己的类，那么可以看看“httpMessage”类。

查看NanoHttpd

NanoHTTPD是一个轻量级的HTTP服务器，设计用于嵌入其他应用程序，在Modified BSD许可下发布。

它正在Github开发，并使用Apache Maven进行构建和单元测试。”

这是我简单的web服务器，在JMeter中用于测试webhook(这就是为什么它会在收到请求后关闭并结束自己)。

import java.io.IOException;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class HttpServer {

    private static int extractContentLength(StringBuilder sb) {
        int length = 0;
        String[] lines = sb.toString().split("\\n");
        for (int i = 0; i < lines.length; i++) {
            String s = lines[i];
            if (s.toLowerCase().startsWith("Content-Length:".toLowerCase()) && i <= lines.length - 2) {
                String slength = s.substring(s.indexOf(":") + 1, s.length()).trim();
                length = Integer.parseInt(slength);
                System.out.println("Length = " + length);
                return length;
            }
        }
        return 0;
    }

    public static void main(String[] args) throws IOException {
        
        
        int port = Integer.parseInt(args[0]);
        System.out.println("starting HTTP Server on port " + port);

        StringBuilder outputString = new StringBuilder(1000);

        ServerSocket serverSocket = new ServerSocket(port);
        serverSocket.setSoTimeout(3 * 60 * 1000); // 3 minutes timeout
        while (true) {

            outputString.setLength(0); // reset buff

            Socket clientSocket = serverSocket.accept(); // blocking
            PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);

            try {

                boolean isBodyRead = false;
                int dataBuffer;
                while ((dataBuffer = clientSocket.getInputStream().read()) != -1) {

                    if (dataBuffer == 13) { // CR
                        if (clientSocket.getInputStream().read() == 10) { // LF
                            outputString.append("\n");
                        }
                    } else {
                        outputString.append((char) dataBuffer);
                    }
                    
                    // do we have Content length
                    int len = extractContentLength(outputString);
                    if (len > 0) {
                        int actualLength = len - 1; // we need to substract \r\n
                        for (int i = 0; i < actualLength; i++) {
                            int body = clientSocket.getInputStream().read();
                            outputString.append((char) body);
                        }
                        isBodyRead = true;
                        break;
                    }

                } // end of reading while

                if (isBodyRead) {
                    // response headers
                    out.println("HTTP/1.1 200 OK");
                    out.println("Connection: close");
                    out.println(); // must have empty line for HTTP
                    
                    out.flush(); 
                    out.close(); // close clients connection
                }

            } catch (IOException ioEx) {
                System.out.println(ioEx.getMessage());
            }

            System.out.println(outputString.toString());
            break; // stop server - break while true
            
        } // end of outer while true
        
        serverSocket.close();

    } // end of method

}

你可以这样测试:

curl -X POST -H "Content-Type: application/json" -H "Connection: close" -d '{"name": "gustinmi", "email": "gustinmi at google dot com "}' -v http://localhost:8081/