增加tracker转发
Change-Id: I5aad9b143371870714b49040708170f578f7df89
diff --git a/src/main/java/tracker/DataCaptureProxy.java b/src/main/java/tracker/DataCaptureProxy.java
new file mode 100644
index 0000000..4d2737f
--- /dev/null
+++ b/src/main/java/tracker/DataCaptureProxy.java
@@ -0,0 +1,73 @@
+package tracker;
+
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import org.simpleframework.http.Request;
+import org.simpleframework.http.Response;
+import org.simpleframework.http.core.Container;
+
+/**
+ * 拦截 announce 请求，打印参数后转发给真实 Tracker。
+ */
+public class DataCaptureProxy implements Container {
+
+ private final String trackerHost;
+ private final int trackerPort;
+
+ public DataCaptureProxy(String trackerHost, int trackerPort) {
+ this.trackerHost = trackerHost;
+ this.trackerPort = trackerPort;
+ }
+
+ @Override
+ public void handle(Request req, Response resp) {
+ try {
+ // 提取并打印关键参数
+ String infoHash = req.getParameter("info_hash");
+ String uploaded = req.getParameter("uploaded");
+ String downloaded= req.getParameter("downloaded");
+ String passkey = req.getParameter("passkey");
+ System.out.println(
+ "Captured announce → info_hash=" + infoHash +
+ ", uploaded=" + uploaded +
+ ", downloaded=" + downloaded +
+ ", passkey=" + passkey
+ );
+
+ // 构造转发 URL
+ String path = req.getPath().getPath();
+ String query = req.getQuery().toString();
+ String targetUrl = "http://" + trackerHost + ":" + trackerPort
+ + path + "?" + query;
+
+ HttpURLConnection connection =
+ (HttpURLConnection) new URL(targetUrl).openConnection();
+ connection.setRequestMethod("GET");
+
+ // 转发响应码和类型
+ resp.setCode(connection.getResponseCode());
+ String ct = connection.getContentType();
+ if (ct != null) resp.setValue("Content-Type", ct);
+
+ // 转发响应体
+ try (InputStream in = connection.getInputStream();
+ OutputStream out = resp.getOutputStream()) {
+ byte[] buf = new byte[8192];
+ int len;
+ while ((len = in.read(buf)) != -1) {
+ out.write(buf, 0, len);
+ }
+ }
+
+ } catch (Exception e) {
+ try {
+ resp.setCode(500);
+ resp.close();
+ } catch (Exception ignore) {}
+ e.printStackTrace();
+ }
+ }
+}