Over the past few weeks, several readers have informed us that they have encountered Spring’s Controller Servlet.
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Controller. The controller creates the registry business logic. The @Controller annotation is used here to uniquely identify a class as a controller. Front Controller − In Spring Web MVC, the DispatcherServlet type acts as a front controller. It is responsible for managing the transition of a Spring MVC application.
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4.1. Acquaintance Withweb Sockets
Are Spring controllers servlets?
Spring MVC has always been one of many frameworks built on top of servlets to try and make the task of writing a global online application a little easier. Essentially, some requests are mapped to a DispatcherServlet which acts asinterface operator. The DispatcherServlet then calls the controller whose annotations match the one-way request.
The WebSocket protocol, RFC 6455, providesAbility to set up another two-way full duplex communication channel between the owner and the serverover one TCP connection. This is a standard TCP protocol, different from but configured for HTTP.works over HTTP, uses ports 80 and only 443, and allows you to reuse found firewall rules.
WebSocket communications begin with an HTTP request that uses the
Upgrade HTTP header.upgrade or, in this case, migrate to the WebSocket protocol. The following types of examplesshows interaction:
What is @controller and @RestController?
@Controller is just about any common annotation used to mark a class as a Spring MVC controller, while @RestController is a special controller used in global RESTFul services and equivalent to @Controller + @ResponseBody.
Instead of normal status codes, a WebSocket-enabled server returns output.looks like this:
After a successful handshake, the TCP socket on which the HTTP update is based is stored in the sample application.open for the client and your server to continue sending receive messages. Done
It is not possible to describe in detail how WebSockets works in this document.See RFC 6455, the WebSocket chapter on HTML5, or one of the manyIntroductory web tutorial.
Please note that if the WebSocket server is runningand a global network server (like Nginx), youyou probably need to set it positively in order to forward override requests from WebSocket to WebSocketServer. If the application is running in this cloud environment, also checkCloud provider’s instructions for WebSocket support.
GET /spring-websocket-portfolio/portfolio HTTP/1.1Host: websocket localhost: 8080Update: (1)Connection: update (2)Sec-WebSocket-Key: Uc9l9TMkWGbHFD2qnFHltg==WebSocket Second Protocol: v10.stomp, v11.stompSec-WebSocket version: 13Source: http://localhost:8080
HTTP/1.1 protocol hardware switch (1)Update: Web SocketsConnection: UpdateSec-WebSocket-Accept: 1qVdfYHU9hPOl4JYYNXF623Gzn0=WebSocket Sec Protocol: v10.stomp
4.1.1. HTTP vs. WebSocket
In fact, WebSocket is HTTP compatible and starts with an HTTP request,It is important to understand that the two protocols give extremely different results.Application programming architectures and models.
The application is modeled using HTTP and/or REST because URThere are many L-addresses. To interact with your current application,Clients access these URLs, a variety of requests and responses. Server requests are redirected tocorresponding user based on HTTP URL, formula and title. Contrast,
by in WebSockets, and there is usually only one URL for the initial connection.Then all messaging packets work with the same TCP working relationship. It indicatesa completely different architecture for asynchronous and event-driven messaging.
WebSocket is also their low-level, non-prescriptive transport protocol, unlike HTTP.any semantics to the actual content of the messages. This means that there is often no path to a strategy or process.a message if the patient and the server as a whole disagree with the semantics.
WebSocket clients and servers may pay to use a higher level text messaging protocol.(for STOMP), for example, through the human
Sec-WebSocket-Protocol header in the HTTP handshake request.Otherwise, they will have to find their ownlegal agreements.
4.1.2. When used for WebSockets
Web sockets can sometimes make a website dynamic and interactive. However, in some casesA combination of Ajax HTTP Streaming or Long Polling can create a simple andeffective solution.
What is @controller in Spring boot?
Spring Boot @Controller The @Controller annotation indicates that the entire annotated class is a controller. This is a specialization of @Component that is automatically discovered when parsing classpaths. It is typically used in conjunction with annotated handler methods based on its own @RequestMapping annotation.
For example, Word, email, and social media feeds should update dynamically, but they absolutely do.it’s perfectly fine to do this every few minutes. collaboration, gaming and finance appson the other hand, sometimes they need to be much closer to real time.
Latency itself is often not a critical factor. If the total message volume is relatively small (eg.Network failure monitoring) Surge or HTTP Polling can be a useful solution.It is the combination of low latency, high frequency, amplitude and number that makes the bestFor example, I would say using WebSocket.Get a faster
수정: 스프링 서블릿 컨트롤러
FIX: Spring Servlet-controller
CORREÇÃO: Controlador De Servlet Spring
CORRECTIF : Contrôleur De Servlet Spring
FIX: Controlador De Servlet Spring
ИСПРАВЛЕНИЕ: контроллер сервлета Spring
FIX: Controller Servlet Di Primavera
NAPRAW: Kontroler Serwletów Spring