Proxyee

<dependency>
    <groupId>com.github.monkeywie</groupId>
    <artifactId>proxyee</artifactId>
    <version>1.7.4</version>
</dependency>

new HttpProxyServer().start(9999);

HttpProxyServerConfig config =  new HttpProxyServerConfig();
//开启HTTPS支持
//不开启的话HTTPS不会被拦截，而是直接转发原始报文
config.setHandleSsl(true);
new HttpProxyServer()
    .serverConfig(config)
    .proxyInterceptInitializer(new HttpProxyInterceptInitializer() {
      @Override
      public void init(HttpProxyInterceptPipeline pipeline) {
        pipeline.addLast(new FullResponseIntercept() {

          @Override
          public boolean match(HttpRequest httpRequest, HttpResponse httpResponse, HttpProxyInterceptPipeline pipeline) {
            //在匹配到百度首页时插入js
            return HttpUtil.checkUrl(pipeline.getHttpRequest(), "^www.baidu.com$")
                && isHtml(httpRequest, httpResponse);
          }

          @Override
          public void handleResponse(HttpRequest httpRequest, FullHttpResponse httpResponse, HttpProxyInterceptPipeline pipeline) {
            //打印原始响应信息
            System.out.println(httpResponse.toString());
            System.out.println(httpResponse.content().toString(Charset.defaultCharset()));
            //修改响应头和响应体
            httpResponse.headers().set("handel", "edit head");
            httpResponse.content().writeBytes("<script>alert('hello proxyee')</script>".getBytes());
          }
        });
      }
    })
    .start(9999);

#key的生成，这样是生成RSA密钥，openssl格式，2048位强度。ca.key是密钥文件名。
openssl genrsa -out ca.key 2048

#key的转换，转换成netty支持私钥编码格式
openssl pkcs8 -topk8 -nocrypt -inform PEM -outform DER -in ca.key -out ca_private.der

#crt的生成，通过-subj选项可以自定义证书的相关信息
openssl req -sha256 -new -x509 -days 365 -key ca.key -out ca.crt \
    -subj "/C=CN/ST=GD/L=SZ/O=lee/OU=study/CN=testRoot"

// curl -i -x 127.0.0.1:9999 -U admin:123456 http://www.baidu.com
HttpProxyServerConfig config = new HttpProxyServerConfig();
        config.setAuthenticationProvider(new BasicHttpProxyAuthenticationProvider() {
            @Override
            protected BasicHttpToken authenticate(String usr, String pwd) {
                if ("admin".equals(usr) && "123456".equals(pwd)) {
                    return new BasicHttpToken(usr, pwd);
                }
                return null;
            }
        });
new HttpProxyServer()
        .serverConfig(config)
        .start(9999);

HttpToken token = HttpAuthContext.getToken(clientChannel);

new HttpProxyServer()
    .proxyConfig(new ProxyConfig(ProxyType.SOCKS5, "127.0.0.1", 1085))  //使用socks5二级代理
    .start(9999);