我真的想更好地了解如何处理CONNECT HTTP请求流程。我在我正在构建的HttpServer中陷入困境，希望其他人可以帮助我煽动我应该如何处理下一个挑战。到目前为止我的代码的一些信息。我有一个类HTTPServer侦听端口8080上的套接字（最初是非SSL套接字）。我有一个名为DefaultHttpRequestHandler的类，它包含一个HTTPClient实例，它处理服务器需要进行的所有请求，HttpServer内的工作线程处理调度浏览器发送到端口8080的所有请求。
我的问题如下：
public class DefaultHttpServer {
public static void main(String[] args) throws Exception {
Thread t = new RequestListenerThread(8080);
t.setDaemon(false);
t.start();
//send a request to proxy server for testing
testSendReqFromClient() ;
}
public static void testSendReqFromClient() throws Exception
{
SSLContext sslCtx = SSLContext.getInstance("TLS");
// sslCtx.init(null,new TrustManager[] { new EasyX509TrustManager() }, null);
sslCtx.init(null, new TrustManager[] { new X509TrustManager() {
public java.security.cert.X509Certificate[] getAcceptedIssuers() {
System.out.println("getAcceptedIssuers =============");
return null;
}
public void checkClientTrusted(X509Certificate[] certs,
String authType) {
System.out.println("checkClientTrusted =============");
}
public void checkServerTrusted(X509Certificate[] certs,
String authType) {
System.out.println("checkServerTrusted =============");
}
@Override
public void checkClientTrusted(
java.security.cert.X509Certificate[] arg0,
String arg1) throws CertificateException {
// TODO Auto-generated method stub
}
@Override
public void checkServerTrusted(
java.security.cert.X509Certificate[] arg0,
String arg1) throws CertificateException {
// TODO Auto-generated method stub
}
} }, new SecureRandom());
Thread.sleep(5000);
SSLSocketFactory sf = new SSLSocketFactory(sslCtx, SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
Scheme https = new Scheme("https", 443, sf);
SchemeRegistry schemeRegistry = new SchemeRegistry();
schemeRegistry.register(https);
Scheme http = new Scheme("http", 80, PlainSocketFactory.getSocketFactory());
schemeRegistry.register(http);
BasicHttpRequest req = new BasicHttpRequest("GET","https://www.yahoo.com");
ThreadSafeClientConnManager tm = new ThreadSafeClientConnManager(schemeRegistry);
HttpClient httpClient = new DefaultHttpClient(tm);
ConnRouteParams.setDefaultProxy(req.getParams(), new HttpHost("localhost",8080,"http"));
httpClient.execute(new RequestWrapper(req));
}
}
public class DefaultHttpRequestHandler implements HttpRequestHandler {
private static String sslType = "TLS";
private HttpClient httpClient = null;
private ThreadSafeClientConnManager tm;
public DefaultHttpRequestHandler() {
super();
init();
}
private void init() {
try {
SSLContext sslCtx = SSLContext.getInstance(sslType);
// sslCtx.init(null,new TrustManager[] { new EasyX509TrustManager() }, null);
sslCtx.init(null, new TrustManager[] { new X509TrustManager() {
public java.security.cert.X509Certificate[] getAcceptedIssuers() {
System.out.println("getAcceptedIssuers =============");
return null;
}
public void checkClientTrusted(X509Certificate[] certs,
String authType) {
System.out.println("checkClientTrusted =============");
}
public void checkServerTrusted(X509Certificate[] certs,
String authType) {
System.out.println("checkServerTrusted =============");
}
@Override
public void checkClientTrusted(
java.security.cert.X509Certificate[] arg0,
String arg1) throws CertificateException {
// TODO Auto-generated method stub
}
@Override
public void checkServerTrusted(
java.security.cert.X509Certificate[] arg0,
String arg1) throws CertificateException {
// TODO Auto-generated method stub
}
} }, new SecureRandom());
SSLSocketFactory sf = new SSLSocketFactory(sslCtx, SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
Scheme https = new Scheme("https", 443, sf);
SchemeRegistry schemeRegistry = new SchemeRegistry();
schemeRegistry.register(https);
Scheme http = new Scheme("http", 80, PlainSocketFactory.getSocketFactory());
schemeRegistry.register(http);
tm = new ThreadSafeClientConnManager(schemeRegistry);
//httpClient = new ContentEncodingHttpClient(tm);
httpClient = new DefaultHttpClient(tm);
httpClient.getParams().setParameter(ClientPNames.ALLOW_CIRCULAR_REDIRECTS, true);
//httpClient.getConnectionManager().getSchemeRegistry() .register(https);
} catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
}
}
public void handle(HttpRequest request, HttpResponse response,
HttpContext context) throws HttpException, IOException {
System.out.println(request);
RequestLine reqLine = request.getRequestLine();
if(reqLine.getMethod().equalsIgnoreCase("CONNECT"))
{
response.setEntity(new BufferedHttpEntity(new StringEntity("HTTP/1.0 200 Connection established\r\nProxy-agent: proxy client\r\n\r\n")));
//do i switch the socket to sslsocketconnection in defaulthttpserver here?
}
else
{
try {
HttpResponse clientResponse = null;
HttpEntity entity = null;
clientResponse = httpClient.execute(new RequestWrapper(request));
entity = clientResponse.getEntity();
if (entity != null) {
response.setEntity(new BufferedHttpEntity(entity));
}
} catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
}
}
}
}
class RequestListenerThread extends Thread {
private static ServerSocket sslServersocket = null;
private static ServerSocket serversocket = null;
static ServerSocketFactory ssocketFactory = null;
private final HttpParams params;
private final HttpService httpService;
Selector selector ;
public RequestListenerThread(int port) throws Exception {
KeyStore ks = KeyStore.getInstance("JKS");
ks.load(new FileInputStream("privateKey2.store"), "whitehatsec123".toCharArray());
KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509");
kmf.init(ks, "whitehatsec123".toCharArray());
SSLContext context = SSLContext.getInstance("TLS");
context.init(kmf.getKeyManagers(), null, null);
ssocketFactory = context.getServerSocketFactory();
//serversocket = ssocketFactory.createServerSocket(port);
serversocket = new ServerSocket(port);
this.params = new SyncBasicHttpParams();
this.params.setBooleanParameter(ClientPNames.HANDLE_REDIRECTS, true).setIntParameter(CoreConnectionPNames.SO_TIMEOUT, 50000)
.setIntParameter(CoreConnectionPNames.SOCKET_BUFFER_SIZE,
8 * 1024)
.setBooleanParameter(
CoreConnectionPNames.STALE_CONNECTION_CHECK, false)
.setBooleanParameter(CoreConnectionPNames.TCP_NODELAY, true)
.setParameter(CoreProtocolPNames.ORIGIN_SERVER,
"HttpComponents/1.1");
// Set up the HTTP protocol processor
HttpProcessor httpproc = new ImmutableHttpProcessor(
new HttpResponseInterceptor[] { new ResponseDate(),
new ResponseServer(), new ResponseContent(),
new ResponseConnControl() });
// Set up request handlers
HttpRequestHandlerRegistry reqistry = new HttpRequestHandlerRegistry();
reqistry.register("*", new DefaultHttpRequestHandler());
// Set up the HTTP service
this.httpService = new HttpService(httpproc,
new DefaultConnectionReuseStrategy(),
new DefaultHttpResponseFactory(), reqistry, this.params);
}
public void run()
{
System.out.println("Listening on port "
+ serversocket.getLocalPort());
while (!Thread.interrupted())
{
try
{
// Set up HTTP connection
Socket socket = serversocket.accept();
DefaultHttpServerConnection conn = new DefaultHttpServerConnection();
System.out.println("Incoming connection from "
+ socket.getInetAddress());
conn.bind(socket, this.params);
// Start worker thread
Thread t = new WorkerThread(this.httpService, conn);
t.setDaemon(true);
t.start();
} catch (InterruptedIOException ex) {
break;
} catch (IOException ex) {
System.err
.println("I/O error initialising connection thread: "
+ ex.getMessage());
ex.printStackTrace();
break;
}
}
}
}
class WorkerThread extends Thread {
private final HttpService httpservice;
private final HttpServerConnection conn;
public WorkerThread(final HttpService httpservice,
final HttpServerConnection conn) {
super();
this.httpservice = httpservice;
this.conn = conn;
}
public void run() {
System.out.println("New connection thread");
HttpContext context = new BasicHttpContext(null);
try {
while (!Thread.interrupted() && this.conn.isOpen()) {
this.httpservice.handleRequest(this.conn, context);
}
} catch (ConnectionClosedException ex) {
System.err.println("Client closed connection");
} catch (IOException ex) {
System.err.println("I/O error: " + ex.getMessage());
ex.printStackTrace();
} catch (HttpException ex) {
System.err.println("Unrecoverable HTTP protocol violation: "
+ ex.getMessage());
} finally {
try {
this.conn.shutdown();
} catch (IOException ignore) {
}
}
}
}
答案 0 :(得分：4)
接收CONNECT请求（并接受它）的代理不执行任何SSL / TLS初始化或处理（如果确实如此，它将是潜在的MITM攻击者）。它只是来回传递目标HTTPS主机和初始客户端之间的所有流量。
这些答案中可能更详细：
您需要的是能够获取底层套接字（或输入/输出流）并写入您在另一侧读取的每个字节。