spring SockJsMessageCodec 源码
spring SockJsMessageCodec 代码
文件路径：/spring-websocket/src/main/java/org/springframework/web/socket/sockjs/frame/SockJsMessageCodec.java
/*
* Copyright 2002-2014 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.frame;
import java.io.IOException;
import java.io.InputStream;
import org.springframework.lang.Nullable;
/**
* Encode and decode messages to and from a SockJS message frame,
* essentially an array of JSON-encoded messages. For example:
*
* <pre class="code">
* a["message1","message2"]
* </pre>
*
* @author Rossen Stoyanchev
* @since 4.0
*/
public interface SockJsMessageCodec {
/**
* Encode the given messages as a SockJS message frame. Aside from applying standard
* JSON quoting to each message, there are some additional JSON Unicode escaping
* rules. See the "JSON Unicode Encoding" section of SockJS protocol (i.e. the
* protocol test suite).
* @param messages the messages to encode
* @return the content for a SockJS message frame (never {@code null})
*/
String encode(String... messages);
/**
* Decode the given SockJS message frame.
* @param content the SockJS message frame
* @return an array of messages, or {@code null} if none
* @throws IOException if the content could not be parsed
*/
@Nullable
String[] decode(String content) throws IOException;
/**
* Decode the given SockJS message frame.
* @param content the SockJS message frame
* @return an array of messages, or {@code null} if none
* @throws IOException if the content could not be parsed
*/
@Nullable
String[] decodeInputStream(InputStream content) throws IOException;
}
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