JAVA -class library technical principle of exploring the W3C Jigsaw framework

The W3C Jigsaw framework is an open source web server written in Java, which has the characteristics of modularity, scalability and lightweight.This article will explore the technical principles of the Java class library of the W3C JIGSAW framework and provide the corresponding Java code example. Introduction to W3C JIGSAW framework The W3C Jigsaw framework is a programmable web server based on Java. It uses a powerful network programming API and class library provided by Java to achieve high -performance, multi -threaded, and reliable web server functions.It was developed by W3C (World Wide Web Consortium). As an open source software, it can be easily used to build and expand the web server. Second, the technical principle of Java -class libraries in W3C JIGSAW framework The technical principles of the Java class library of W3C JIGSAW framework mainly include the following aspects: 1. HTTP protocol processing: The W3C Jigsaw framework uses Java's `java.net` bags in Java's` Serversocket` and `Socket` classes to process HTTP connections.It listens to a specific port by creating a `Serversocket` object, and create a new` socket` object when receiving the client connection request to handle the connection.Using the `socket` class can easily obtain the request URL, the request header information, and the content of the request body, and can send the response data through the` OutputStream`. 2. Resource management: The W3C Jigsaw framework manages web resources by `ORG.W3C.JIGSAW.RSources` Bags.Each resource is a Java object, which is implemented by inheriting `ORG.W3C.Tools.Resources.RSourceFrame` class.By creating and configuring different types of resource objects, you can provide various functions for the web server, such as handling static pages, dynamic pages, and file uploads. 3. Controller: The W3C Jigsaw framework uses the controller to manage the configuration and operation of the web server.The controller is a Java class that is implemented by inheriting `ORG.W3C.Tools.Resources.protocolhandler`.The controller is responsible for receiving and processing client requests, and distribution according to the request URL, request method and other information.According to specific needs, multiple controllers can be configured to process different types of requests. 4. Filter: The W3C JIGSAW framework is processed to the request and response through a filter.The filter is a java class, which is the function of the filter by realizing the function of the filter by achieving the implementation of the `ORG.W3C.JIGSAW.Http.replyfilter` interface.By configuring the filter, it can be used to perform operations such as pre -processing, authority, data compression, etc., as well as operations such as encrypted, redirecting, and setting up cache strategies for response. 5. Configure file: The W3C JIGSAW framework manages various configuration information of the web server through configuration files.The configuration file is a text file, which contains the port of the server monitoring, the path of the resource, the configuration of the controller, and the configuration of the filter.You can adjust the server behavior by modifying the content of the configuration file. 3. Java code example The following is a simple Java code example. How to use the W3C JIGSAW framework to create a basic web server: import org.w3c.jigsaw.http.httpd; import org.w3c.jigsaw.daemon.Jigsaw; import org.w3c.tools.resources.ProtocolHandler; public class MyServer { public static void main(String[] args) { try { // Create an HTTP server httpd server = Jigsaw.makeServer(args); // Get the root directory resource object ProtocolHandler root = (ProtocolHandler) server.getRootResource(); // Set the processing class of root directory resources root.setFrameClass("org.w3c.jigsaw.resources.DirectoryResource"); // Start the server server.start(); System.out.println ("Web server has been started, monitoring port:" + server.getport ()); // Waiting for the server to stop server.join(); } catch (Exception e) { e.printStackTrace(); } } } The above code creates a web server instance and defines the processing class of root directory resources as `org.w3c.jigsaw.Resources.directoryResource`, which means that the file directory on the server can be accessed.You can get the contents of the server root directory by visiting the `http:// localhost: port/`. Through the above example code, you can further learn and explore according to the JAVA -class library technical principles provided by the W3C JIGSAW framework to build a more powerful and customized web server application.This framework provides rich APIs and class libraries that can help you handle functions such as HTTP protocols, management resources, implementation controllers and filters.