spring XhrTransport 源码
spring XhrTransport 代码
文件路径：/spring-websocket/src/main/java/org/springframework/web/socket/sockjs/client/XhrTransport.java
/*
* Copyright 2002-2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.web.socket.sockjs.client;
import java.net.URI;
import org.springframework.http.HttpHeaders;
import org.springframework.web.socket.TextMessage;
/**
* A SockJS {@link Transport} that uses HTTP requests to simulate a WebSocket
* interaction. The {@code connect} method of the base {@code Transport} interface
* is used to receive messages from the server while the
* {@link #executeSendRequest} method here is used to send messages.
*
* @author Rossen Stoyanchev
* @since 4.1
*/
public interface XhrTransport extends Transport, InfoReceiver {
/**
* An {@code XhrTransport} supports both the "xhr_streaming" and "xhr" SockJS
* server transports. From a client perspective there is no implementation
* difference.
* <p>By default an {@code XhrTransport} will be used with "xhr_streaming"
* first and then with "xhr", if the streaming fails to connect. In some
* cases it may be useful to suppress streaming so that only "xhr" is used.
*/
boolean isXhrStreamingDisabled();
/**
* Execute a request to send the message to the server.
* <p>Note that as of 4.2 this method accepts a {@code headers} parameter.
* @param transportUrl the URL for sending messages.
* @param message the message to send
*/
void executeSendRequest(URI transportUrl, HttpHeaders headers, TextMessage message);
}
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