Cleanup: remove hijacking code

engine/src/main/java/de/gesellix/docker/engine/EngineRequest.java

@@ -19,7 +19,6 @@ public class EngineRequest {
   private int timeout = 0;
 
   private boolean async = false;
-  private AttachConfig attach = null;
   private OutputStream stdout;
 
   private String apiVersion = null;
@@ -93,14 +92,6 @@ public void setAsync(boolean async) {
     this.async = async;
   }
 
-  public AttachConfig getAttach() {
-    return attach;
-  }
-
-  public void setAttach(AttachConfig attach) {
-    this.attach = attach;
-  }
-
   public OutputStream getStdout() {
     return stdout;
   }
@@ -124,11 +115,11 @@ public boolean equals(Object o) {
     EngineRequest that = (EngineRequest) o;
     return timeout == that.timeout && async == that.async && method == that.method && Objects.equals(path, that.path) && Objects.equals(headers, that.headers) &&
            Objects.equals(query, that.query) && Objects.equals(contentType, that.contentType) && Objects.equals(body, that.body) &&
-           Objects.equals(attach, that.attach) && Objects.equals(stdout, that.stdout) && Objects.equals(apiVersion, that.apiVersion);
+           Objects.equals(stdout, that.stdout) && Objects.equals(apiVersion, that.apiVersion);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(method, path, headers, query, contentType, body, timeout, async, attach, stdout, apiVersion);
+    return Objects.hash(method, path, headers, query, contentType, body, timeout, async, stdout, apiVersion);
   }
 }

engine/src/main/java/de/gesellix/docker/engine/OkDockerClient.java

@@ -6,8 +6,6 @@
 import de.gesellix.docker.client.filesocket.NamedPipeSocketFactory;
 import de.gesellix.docker.client.filesocket.UnixSocketFactory;
 import de.gesellix.docker.client.filesocket.UnixSocketFactorySupport;
-import de.gesellix.docker.hijack.HijackingInterceptor;
-import de.gesellix.docker.hijack.OkResponseCallback;
 import de.gesellix.docker.json.CustomObjectAdapterFactory;
 import de.gesellix.docker.rawstream.RawInputStream;
 import de.gesellix.docker.response.JsonContentHandler;
@@ -148,60 +146,30 @@ public WebSocket webSocket(Map<String, Object> requestConfig, WebSocketListener
   public EngineResponse request(EngineRequest requestConfig) {
     EngineRequest config = ensureValidRequestConfig(requestConfig);
 
-    AttachConfig attachConfig = null;
-    if (config.getAttach() != null) {
-      Map<String, String> headers = config.getHeaders();
-      if (headers == null) {
-        headers = new HashMap<>();
-      }
-      config.setHeaders(headers);
-      // https://docs.docker.com/engine/api/v1.41/#operation/ContainerAttach
-      // To hint potential proxies about connection hijacking, the Docker client sends connection upgrade headers.
-      headers.put("Upgrade", "tcp");
-      headers.put("Connection", "Upgrade");
-      attachConfig = config.getAttach();
-    }
-//        boolean multiplexStreams = config.multiplexStreams
-
     Request.Builder requestBuilder = prepareRequest(new Request.Builder(), config);
     final Request request = requestBuilder.build();
 
     OkHttpClient.Builder clientBuilder = prepareClient(new OkHttpClient.Builder(), config.getTimeout());
-    OkResponseCallback responseCallback = null;
-    if (attachConfig != null) {
-      clientBuilder.addNetworkInterceptor(new HijackingInterceptor(
-          attachConfig,
-          attachConfig.getStreams().getStdin() == null ? null : Okio.source(attachConfig.getStreams().getStdin()),
-          attachConfig.getStreams().getStdout() == null ? null : Okio.sink(attachConfig.getStreams().getStdout())));
-      responseCallback = new OkResponseCallback(attachConfig);
-    }
     final OkHttpClient client = newClient(clientBuilder);
 
     log.debug(request.method() + " " + request.url() + " using proxy: " + client.proxy());
 
     Call call = client.newCall(request);
-    if (responseCallback != null) {
-      call.enqueue(responseCallback);
-      log.debug("request enqueued");
-      return new EngineResponse<Void>();
-    }
-    else {
-      EngineResponse dockerResponse;
-      try {
-        Response response = call.execute();
-        log.debug("response: " + response);
-        dockerResponse = handleResponse(response, config);
-        if (dockerResponse.getStream() == null) {
+    EngineResponse dockerResponse;
+    try {
+      Response response = call.execute();
+      log.debug("response: " + response);
+      dockerResponse = handleResponse(response, config);
+      if (dockerResponse.getStream() == null) {
 //          log.warn("closing response...");
-          response.close();
-        }
-      }
-      catch (Exception e) {
-        log.error("Request failed", e);
-        throw new RuntimeException("Request failed", e);
+        response.close();
       }
-      return dockerResponse;
     }
+    catch (Exception e) {
+      log.error("Request failed", e);
+      throw new RuntimeException("Request failed", e);
+    }
+    return dockerResponse;
   }
 
   private Request.Builder prepareRequest(final Request.Builder builder, final EngineRequest config) {
@@ -526,7 +494,6 @@ private EngineRequest ensureValidRequestConfig(final Map<String, Object> config,
     engineRequest.setBody(config.get("body"));
 
     engineRequest.setAsync(config.get("async") != null && (Boolean) config.get("async"));
-    engineRequest.setAttach((AttachConfig) config.get("attach"));
     engineRequest.setStdout((OutputStream) config.get("stdout"));
 
     engineRequest.setApiVersion((String) config.get("apiVersion"));