Question

无法理解我在用于开发涉及图像/视频的聊天应用程序的websocket配置中的不同参数：

我注意到网页中的SockJs发送帧大小为16K的消息。我还测试了邮件大小限制决定了我可以传输的邮件的最大大小。

你可以告诉我这是什么：

stream bytes limit
发送缓冲区大小限制
http消息缓存大小
什么是部分消息以及如何使用它们在这里有用吗？
此外，我计划将图片/视频的最大尺寸设置为2GB，并在发布时预计会有大约100个并发用户。

请您告诉我们应该保留哪些尺寸以及为什么？什么是默认值？以及它们每个如何影响我的聊天应用程序的性能？

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {

@Override
public void registerStompEndpoints(StompEndpointRegistry registry) {
    registry.addEndpoint("/stomp").withSockJS()
            .setStreamBytesLimit(15 * 1024)
            .setHttpMessageCacheSize(15 * 1024);
}

@Override
public void configureMessageBroker(MessageBrokerRegistry registry) {
    registry.enableSimpleBroker("/queue/", "/topic/", "/exchange/");
    registry.setApplicationDestinationPrefixes("/app");
}

@Override
public void configureWebSocketTransport(WebSocketTransportRegistration registration) {
    registration.setSendTimeLimit(15 * 1000)
            .setSendBufferSizeLimit(1 * 1024)
            // max message size 2GB (2048 bytes) : default is 64KB
            .setMessageSizeLimit(2 * 1024 * 1024);
}

}

Answer 1

回答我的调查结果和实施问题：

在以下配置中：

@Override
public void configureWebSocketTransport(WebSocketTransportRegistration registration) {
    registration.setSendTimeLimit(60 * 1000)
            .setSendBufferSizeLimit(200 * 1024 * 1024)
            .setMessageSizeLimit(200 * 1024 * 1024);
}

流字节限制：来自源的信息

/**
 * Streaming transports save responses on the client side and don't free
 * memory used by delivered messages. Such transports need to recycle the
 * connection once in a while. This property sets a minimum number of bytes
 * that can be send over a single HTTP streaming request before it will be
 * closed. After that client will open a new request. Setting this value to
 * one effectively disables streaming and will make streaming transports to
 * behave like polling transports.
 * <p>The default value is 128K (i.e. 128 * 1024).
 */
public SockJsServiceRegistration setStreamBytesLimit(int streamBytesLimit) {
    this.streamBytesLimit = streamBytesLimit;
    return this;
}

发送缓冲区大小限制默认值为512KB。如果消息发送速度很慢，则会缓冲后续消息，直到达到sendTimeLimit或sendBufferSizeLimit为止。

http消息缓存大小：来自源的信息

/**
 * The number of server-to-client messages that a session can cache while waiting for
 * the next HTTP polling request from the client. All HTTP transports use this
 * property since even streaming transports recycle HTTP requests periodically.
 * <p>The amount of time between HTTP requests should be relatively brief and will not
 * exceed the allows disconnect delay (see
 * {@link #setDisconnectDelay(long)}), 5 seconds by default.
 * <p>The default size is 100.
 */
public SockJsServiceRegistration setHttpMessageCacheSize(int httpMessageCacheSize) {
    this.httpMessageCacheSize = httpMessageCacheSize;
    return this;
}

什么是部分消息以及如何使用它们，它们在这里有用吗？ 仍然不确定如何通过websocket流式传输大型文件并使用部分消息传递（决定使用HTTP代替）

此外，我计划将图像/视频的最大尺寸设置为2GB，并在发布时预计大约100个并发用户。 =＆GT;由messageSizeLimit设置并使用HTTP进行文件上传/流媒体下载。还使用apache file-upload config设置服务器限制：

@Bean
public CommonsMultipartResolver multipartResolver() {
    CommonsMultipartResolver resolver = new CommonsMultipartResolver();
    resolver.setMaxUploadSize(2 * 1024 * 1024 * 1024); // 2 GB limit set for file upload
    resolver.setDefaultEncoding("utf-8");
    return resolver;

}

Spring Stomp over Websocket：消息/缓冲区/缓存/流限制

1 个答案: