List of the technical principles of the W3C Jigsaw framework in the Java class library

The W3C Jigsaw framework is a tool to build a Java -based Web server and proxy server.It provides a scalable architecture so that developers can customize and expand according to their needs.The following is a list of technical principles of the W3C JIGSAW framework in the Java class library. 1. Server architecture: The core of the W3C JIGSAW framework is an event -based server architecture.It uses a thread pool to manage concurrent requests and assign tasks according to the type of the incident.This architecture enables the server to handle a large number of concurrent requests. 2. HTTP protocol processing: The W3C JIGSAW framework uses the HTTP protocol processing function in the Java class library to analyze and handle the HTTP request and response.It provides a set of APIs to process information such as HTTP head, request method, response code, and provide convenient methods to access and modify this information. The following is a sample code for handling HTTP requests and responses: import org.w3c.www.protocol.http.*; // Analysis of http request Request request = Request.parse(httpRequestStream); // Get the request method String method = request.getMethod(); // Get the request URI String uri = request.getURL().toExternalForm(); // Set the response code int statusCode = 200; String reason = "OK"; HttpRespond response = request.makeRespond(statusCode, reason); // Set the response header response.setContentLength(1000); response.setContentType("text/html"); // Send response response.send(); // Treat HTTP request // ... 3. Resource management: The W3C Jigsaw framework uses the resource management function in the Java class library to manage different resources on the server.Resources can be static files, dynamic content or other web services.Developers can define their own resource types by extending and custom resource managers. The following is a sample code that defines a custom resource: import org.w3c.tools.resources.*; public class MyResource extends Resource { public MyResource(String name, ResourceContainer container) { super(name, container); } public void initialize(Object values[]) { // Initialize resources } public void handle(Request request, HttpResponse response) { // Process request } // Other custom methods and attributes } // Register resources ResourceSpace resourceSpace = new ResourceSpace(); ResourceReference ref = resourceSpace.registerResource(MyResource.class, "myresource"); // Obtain resources in HTTP request processor ResourceReference resourceRef = request.getURLResource(); MyResource resource = (MyResource) resourceRef.lock(); // Treatment resources // ... resourceRef.unlock(); 4. Filter: W3C JIGSAW framework supports filters to pre -process them or post -processing before processing HTTP requests and responses.Filters can be used for certification, authentication, log records and other tasks.Developers can add, customize, and configure filters as needed. The following is a simple filter example code: import org.w3c.www.protocol.http.*; public class MyFilter implements RequestFilter { public ReplyInterface ingoingFilter(RequestInterface request) { // Treatment before request processing return null; } public ReplyInterface outgoingFilter(RequestInterface request, ReplyInterface reply) { // Treatment after the response processing return reply; } } // Register a filter RequestFilterRegistry registry = RequestFilterRegistry.getDefaultRegistry(); registry.registerFilter(new MyFilter()); Summary: The W3C Jigsaw framework uses technical principles such as the server architecture, HTTP protocol processing, resource management, and filter in the Java class library to achieve scalable web servers and proxy servers.Developers can use these principles to customize and expand the functions of the server to meet their needs.