One of the simplest static Web servers

Disclaimer: The data comes from the Tomcat Anatomy book, which is based on the Java socket, socket and stream classes as a conceptual background, now just use it as the base class, not paying attention to itself, focus on the external features and architecture of a server!

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• Httpserver

 PackageSimpleserver;ImportJava.io.File;Importjava.io.IOException;ImportJava.io.InputStream;ImportJava.io.OutputStream;Importjava.net.InetAddress;ImportJava.net.ServerSocket;ImportJava.net.Socket;/*** Description: Server The service personally manages the request, and response, the current service is just a static resource service; * request is used to parse the requested data stream and abstract it into the requested object * response according to the request path to the root The directory looks for resources and outputs; The program responds with only the response body * * As a static server, the program needs to be perfected: the response object itself *@authorAdministrator **/ Public classHttpserver { Public Static FinalString web_root = System.getproperty ("User.dir") +file.separator+ "Webroot";//Specifies the static resource directory, the root directory of the request path        Private Static FinalString Shutdown_command = "/shutdown"; Private Booleanshutdown =false;  Public Static voidMain (String[]args) {System.out.println ("Print output Web_root" +web_root); Httpserver ServerSocket=NewHttpserver ();  Serversocket.await (); //service startup    }         Public voidawait () {ServerSocket ServerSocket=NULL; intPort = 8080; Try{ServerSocket=NewServerSocket (port, 1, Inetaddress.getbyname ("192.168.1.102"));//The port number of the binding service, the number of connections, the address to which the service is to be connected}Catch(IOException e) {e.printstacktrace (); System.exit (1); }         while(!shutdown) {Socket Socket=NULL; InputStream input=NULL; OutputStream Output=NULL; Try{Socket= Serversocket.accept ();//1 listening in here, blockinginput =Socket.getinputstream (); Output=Socket.getoutputstream (); Request Request=NewRequest (input);//2 The data is passed to the request for parsing; the input stream of the socket is requestedRequest.parse (); Response Response=NewResponse (output);//3 The Response object looks for resources based on the resolved request path and responds to the output stream using the socketresponse.setrequest (Request);                Response.sendstaticresource ();                                Socket.close (); //4 The socket is closed after the response is sent back, and the service is stillshutdown =Request.geturi (). Equals (Shutdown_command); }            Catch(Exception e) {e.printstacktrace (); Continue; }                    }            }}

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• Request

 PackageSimpleserver;Importjava.io.IOException;ImportJava.io.InputStream;/*** @ Description: The InputStream of the socket class is parsed to generate many properties, which are subordinate to the class *@authorAdministrator **/ Public classRequest {PrivateInputStream input; PrivateString URI;  PublicRequest (InputStream input) { This. Input =input; }     PublicString GetURI () {returnURI; }     Public voidParse () {StringBuffer request=NewStringBuffer (); inti; byte[]buffer =New  byte[2048]; Try{i=input.read (buffer); }Catch(IOException e) {e.printstacktrace (); I=-1; }         for(intj=0;j<i;j++) {request.append (Char) buffer[j]);         } System.out.println (Request.tostring ()); URI=Parseuri (request.tostring ()); System.out.println ("Intercepted path" +URI); }    PrivateString Parseuri (String requeststring) {//resolves only the URI attribute in the request data        intindex1, Index2; Index1= Requeststring.indexof (' '); if(Index1! =-1) {Index2= Requeststring.indexof (", Index1 + 1); if(Index2 >index1) {                returnRequeststring.substring (index1+1, INDEX2); }        }        return NULL; }}

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• Response

 PackageSimpleserver;ImportJava.io.File;ImportJava.io.FileInputStream;Importjava.io.IOException;ImportJava.io.OutputStream; Public classResponse {Private Static Final intBuffer_size =1024;    Request request;          OutputStream output;  PublicResponse (OutputStream output) { This. Output =output; }     Public voidsetrequest (Request request) { This. Request =request; }             Public voidSendstaticresource ()throwsioexception{byte[] bytes =New byte[Buffer_size]; FileInputStream FIS=NULL; Try{File File=NewFile (Httpserver.web_root, Request.geturi ());//1 root directory stitching request pathSYSTEM.OUT.PRINTLN ("Request Path" +File.getabsolutepath ()); if(File.exists ()) {System.out.println ("File exists"); FIS=Newfileinputstream (file); intch = fis.read (Bytes, 0, buffer_size);  while(Ch!=-1) {output.write (bytes,0, CH);//2.1 Requested response data is written to the output streamch = fis.read (Bytes, 0, buffer_size); }            }            Else{String errormessage= "http/1.1 404 File Not Found\r\n"//2.2 response data written to the output stream+ "content-type:text/html\r\n" + "content-length:23\r\n" + "\ r \ n" + ";            Output.write (Errormessage.getbytes ()); }        }Catch(Exception e) {System.out.println (e.tostring ()); }finally {            if(fis!=NULL) {fis.close (); }        }            }        }

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One of the simplest static Web servers