content: /*
   ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
   ~                                                                               ~
   ~ The MIT License (MIT)                                                         ~
   ~                                                                               ~
   ~ Copyright (c) 2015-2025 miaixz.org and other contributors.                    ~
   ~                                                                               ~
   ~ Permission is hereby granted, free of charge, to any person obtaining a copy  ~
   ~ of this software and associated documentation files (the "Software"), to deal ~
   ~ in the Software without restriction, including without limitation the rights  ~
   ~ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell     ~
   ~ copies of the Software, and to permit persons to whom the Software is         ~
   ~ furnished to do so, subject to the following conditions:                      ~
   ~                                                                               ~
   ~ The above copyright notice and this permission notice shall be included in    ~
   ~ all copies or substantial portions of the Software.                           ~
   ~                                                                               ~
   ~ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR    ~
   ~ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,      ~
   ~ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE   ~
   ~ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER        ~
   ~ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, ~
   ~ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN     ~
   ~ THE SOFTWARE.                                                                 ~
   ~                                                                               ~
   ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
  */
  package org.miaixz.bus.http.metric.http;
  
  import java.io.IOException;
  import java.net.ProtocolException;
  
  import org.miaixz.bus.core.io.sink.BufferSink;
  import org.miaixz.bus.core.net.HTTP;
  import org.miaixz.bus.core.xyz.IoKit;
  import org.miaixz.bus.http.Builder;
  import org.miaixz.bus.http.Request;
  import org.miaixz.bus.http.Response;
  import org.miaixz.bus.http.accord.Exchange;
  import org.miaixz.bus.http.metric.Interceptor;
  import org.miaixz.bus.http.metric.NewChain;
  
  /**
   * 这是链中的最后一个拦截器 它对服务器进行网络调用
   *
   * @author Kimi Liu
   * @since Java 17+
   */
  public class CallServerInterceptor implements Interceptor {
  
      private final boolean forWebSocket;
  
      public CallServerInterceptor(boolean forWebSocket) {
          this.forWebSocket = forWebSocket;
      }
  
      @Override
      public Response intercept(NewChain chain) throws IOException {
          RealInterceptorChain realChain = (RealInterceptorChain) chain;
          Exchange exchange = realChain.exchange();
          Request request = realChain.request();
  
          long sentRequestMillis = System.currentTimeMillis();
  
          exchange.writeRequestHeaders(request);
  
          boolean responseHeadersStarted = false;
          Response.Builder responseBuilder = null;
          if (HTTP.permitsRequestBody(request.method()) && request.body() != null) {
              // If there's a "Expect: 100-continue" header on the request, wait for a "HTTP/1.1 100
              // Continue" response before transmitting the request body. If we don't get that, return
              // what we did get (such as a 4xx response) without ever transmitting the request body.
              if ("100-continue".equalsIgnoreCase(request.header("Expect"))) {
                  exchange.flushRequest();
                  responseHeadersStarted = true;
                  exchange.responseHeadersStart();
                  responseBuilder = exchange.readResponseHeaders(true);
              }
  
              if (responseBuilder == null) {
                  if (request.body().isDuplex()) {
                      // Prepare a duplex body so that the application can send a request body later.
                      exchange.flushRequest();
                      BufferSink bufferedRequestBody = IoKit.buffer(exchange.createRequestBody(request, true));
                      request.body().writeTo(bufferedRequestBody);
                  } else {
                      // Write the request body if the "Expect: 100-continue" expectation was met.
                      BufferSink bufferedRequestBody = IoKit.buffer(exchange.createRequestBody(request, false));
                      request.body().writeTo(bufferedRequestBody);
                      bufferedRequestBody.close();
                  }
              } else {
                  exchange.noRequestBody();
                  if (!exchange.connection().isMultiplexed()) {
                      exchange.noNewExchangesOnConnection();
                  }
              }
          } else {
              exchange.noRequestBody();
          }
  
          if (request.body() == null || !request.body().isDuplex()) {
              exchange.finishRequest();
          }
  
          if (!responseHeadersStarted) {
              exchange.responseHeadersStart();
          }
  
          if (responseBuilder == null) {
              responseBuilder = exchange.readResponseHeaders(false);
          }
  
          Response response = responseBuilder.request(request).handshake(exchange.connection().handshake())
                  .sentRequestAtMillis(sentRequestMillis).receivedResponseAtMillis(System.currentTimeMillis()).build();
  
          int code = response.code();
          if (code == 100) {
              // server sent a 100-continue even though we did not request one.
              // try again to read the actual response
              response = exchange.readResponseHeaders(false).request(request).handshake(exchange.connection().handshake())
                      .sentRequestAtMillis(sentRequestMillis).receivedResponseAtMillis(System.currentTimeMillis())
                      .build();
  
              code = response.code();
          }
  
          exchange.responseHeadersEnd(response);
  
          if (forWebSocket && code == 101) {
              // Connection is upgrading, but we need to ensure interceptors see a non-null response body.
              response = response.newBuilder().body(Builder.EMPTY_RESPONSE).build();
          } else {
              response = response.newBuilder().body(exchange.openResponseBody(response)).build();
          }
  
          if ("close".equalsIgnoreCase(response.request().header(HTTP.CONNECTION))
                  || "close".equalsIgnoreCase(response.header(HTTP.CONNECTION))) {
              exchange.noNewExchangesOnConnection();
          }
  
          if ((code == 204 || code == 205) && response.body().length() > 0) {
              throw new ProtocolException("HTTP " + code + " had non-zero Content-Length: " + response.body().length());
          }
  
          return response;
      }
  
  }
  