Analog interface request to Web server

Client

 Packagecom.lsw.client;ImportJava.io.*;Importjava.net.*;ImportJava.util.*; Public classhttpclinet { Public Static voidMain (string[] args) {//to determine the URI of an HTTP requestString uri = "index.html"; if(Args.length!=0) URI= Args[0]; //access Httpserver by GET requestDoget ("localhost", 8080, URI); }    //access Httpserver by GET request     Public Static voidDoget (String host,intport,string URI) {Socket Socket=NULL; Try{            //establishing an FTP connection with HttpserverSocket =NewSocket (Host,port); }        Catch(Exception e) {e.printstacktrace (); }                Try{            //Create an HTTP request//the first line of the HTTP requestStringBuffer SB =NewStringBuffer ("GET" +uri+ "http/1.1\r\n"); //HTTP request HeaderSb.append ("Accept: */*\r\n"); Sb.append ("Accept-language:zh-cn\r\n"); Sb.append ("Accept-encoding:gzip, deflate\r\n"); Sb.append ("User-agent:httpclient\r\n"); Sb.append ("Host:localhost:8080\r\n"); Sb.append ("Connection:keep-alive\r\n\r\n"); //Send HTTP requestOutputStream socketout = Socket.getoutputstream ();//get the output streamSocketout.write (Sb.tostring (). GetBytes ()); //Sleep 2 seconds, wait for response resultsThread.Sleep (2000); //Receive Response ResultsInputStream socketin = Socket.getinputstream ();//Get input stream            intSize =socketin.available (); byte[] buffer =New byte[size];            Socketin.read (buffer); String Request=NewString (buffer);        SYSTEM.OUT.PRINTLN (Request); }        Catch(Exception e) {e.printstacktrace (); }        finally{            Try{socket.close (); }Catch(Exception e) {e.printstacktrace (); }        }    }}

Service side

 PackageCom.lsw.server;ImportJava.io.*;Importjava.net.*; Public classHttpserver { Public Static voidMain (string[] args) {intPort;                ServerSocket ServerSocket; Try{Port= Integer.parseint (args[0]); System.out.println ("The default port is:" +port); }        Catch(Exception e) {System.out.println ("Default port 8080"); Port= 8080; }                Try{            //creating a listening portServerSocket =NewServerSocket (port); System.out.println ("Server is listening on port:" +Serversocket.getlocalport ());  while(true){                Try{                    //waiting for a customer's link request                    FinalSocket socket =serversocket.accept (); System.out.println ("A new TCP connection was established with the customer, the address of the customer is:" +socket.getinetaddress ()+ "Port is:" +Socket.getport ()); //responding to customer requestsService (socket); }                Catch(Exception e) {e.printstacktrace (); }            }                       }        Catch(Exception e) {e.printstacktrace (); }    }         Public Static voidService (socket socket)throwsexception{//read HTTP request InformationInputStream socketin = Socket.getinputstream ();//Get input stream//sleeps 500 milliseconds, waits for an HTTP requestThread.Sleep (500); intSize =socketin.available (); byte[] buffer =New byte[size];        Socketin.read (buffer); String Request=NewString (buffer); //Print HTTP request dataSYSTEM.OUT.PRINTLN ("The data requested by the client is:" +request); //Parsing HTTP requests//get HTTP request first lineString firstlineofrequest = request.substring (0,request.indexof ("\ r \ n")); System.out.println ("Firstlineofrequest=" +firstlineofrequest); //parsing the first line of an HTTP requeststring[] Parts = Firstlineofrequest.split (""); //URI that resolves HTTP requestsString uri = parts[1]; System.out.println ("Parsing HTTP requests for this uri=" +URI); System.out.println ("VALUE =" + uri.substring (0, 1). toString ()); String Flag= uri.substring (0, 1). toString (); if(Flag.equals ("/") {System.out.println ("This request is a request initiated from the browser"); URI= uri.substring (1). toString (); } System.out.println ("Parsing HTTP requests for this uri=" +URI); //determines the type of HTTP response body, simplified processing hereString ContentType; if(Uri.indexof ("html")! =-1 | | uri.indexof ("htm")! =-1) ContentType= "Text/html"; Else if(Uri.indexof ("jpg")! =-1 | | uri.indexof ("JPEG")! =-1) ContentType= "Image/jpeg"; Else if(Uri.indexof ("gif")! =-1) ContentType= "Image/gif"; ElseContentType= "Application/octet-stream";//byte stream type//Creating HTTP Response Results//Create the first line of the HTTP responseString responsefirstline = "http/1.1 ok\r\n"; //HTTP response HeaderString Responseheader = "Content-type:" +contenttype + "\r\n\r\n"; //gets the input stream that reads the response body data        /*InputStream in = HTTPServer.class.getResourceAsStream (URI); That's what the book says.*/InputStream in= Httpserver.class. getClassLoader (). getResourceAsStream (URI); //Send HTTP response resultsOutputStream socketout = Socket.getoutputstream ();//get the output stream//the first line of the HTTP response is sentSocketout.write (Responsefirstline.getbytes ()); //headers that send HTTP responsesSocketout.write (Responseheader.getbytes ()); System.out.println ("Message Hair delivery Complete"); System.out.println ("Start sending the body of the HTTP response"); //send the body of the HTTP response        intLen = 0; Buffer=New byte[1024]; Try {             while((len=in.read (buffer))! =-1) socketout.write (buffer,0, Len); } Catch(Exception e) {e.printstacktrace (); } System.out.println ("Complete the body of the sending HTTP response"); //sleep 1 seconds, waiting for customers to receive HTTP response resultsThread.Sleep (1000); //To close a TCP connectionSocket.close (); }}

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Analog interface request to Web server