WebSocket 1009 Max frame length of 65536 has been exceeded 问题

项目中使用Spring Cloud Gateway 作为网关，代理WebScoket通信，当请求数据量很大的时候，会出现 1009问题。

onClosing, code = 1009, reason = Max frame length of 65536 has been exceeded.

public final class CloseStatus implements Serializable {
    /**
     * "1009 indicates that an endpoint is terminating the connection because it has
     * received a message that is too big for it to process."
     */
    public static final CloseStatus TOO_BIG_TO_PROCESS = new CloseStatus(1009);
}

翻查网上的资料与查看源码发现确实有限制。

// org.springframework.web.reactive.socket.adapter.NettyWebSocketSessionSupport
public abstract class NettyWebSocketSessionSupport<T> extends AbstractWebSocketSession<T> {

    /**
     * The default max size for inbound WebSocket frames.
     */
    public static final int DEFAULT_FRAME_MAX_SIZE = 64 * 1024;
}

网上的资料都是重新定义bean，可能我这使用版本比较高，gateway 中有配置项，配置一下即可。

Spring Clound 与 Spring Boot 版本

plugins {
    id("org.springframework.boot") version "2.3.7.RELEASE"
    id("io.spring.dependency-management") version "1.0.10.RELEASE"
    kotlin("jvm") version "1.4.32"
    kotlin("plugin.spring") version "1.4.32"
}
extra["springCloudVersion"] = "Hoxton.SR9"

application.yml中配置。

spring:
  cloud:
    gateway:
      httpclient:
        websocket:
          max-frame-payload-length: 2097152 # 2M

同时再配置下WebSocket服务。

@Component
class WebSocketHandler : TextWebSocketHandler() {

    companion object {
        const val MAX_SIZE = 3 * 1024 * 1024 // 3M
    }

    override fun afterConnectionEstablished(session: WebSocketSession) {
        logInfo("afterConnectionEstablished $session")
        logInfo("onConnect 收到客户连接 ${session.remoteAddress.ip()} ")
        session.binaryMessageSizeLimit = MAX_SIZE
        session.textMessageSizeLimit = MAX_SIZE
    }
}

修改以上，即可搞定。