实验七应用层网络编程一

TPMKstandardizationoffice【TPMK5AB-TPMK08-TPMK2C-TPMK18】实验七应用层网络编程一浙江大学城市学院实验 报告 软件系统测试报告下载sgs报告如何下载关于路面塌陷情况报告535n,sgs报告怎么下载竣工报告下载 课程名称计算机网络应用实验项目名称实验七应用层网络编程（一）实验成绩指导老师（签名）日期2014-06-03一.实验目的和要求通过实现使用Java应用层客户端和服务器来获得关于使用JavaSocket网络编程的经验（SMTP、POP3）。二.实验内容、原理及实验结果与分析SMTP编程（参考电子讲义“网络编程参考资料-应用层.pdf”及教材“第2章Socket编程”）阅读“网络编程参考资料-应用层.pdf”中8.3.1部分，实现“SMTP客户机实现”的源代码（SMTPClientDemo.java），并在机器上编译运行通过。（注：可输入城院SMTP邮件服务器smtp.email.zucc.edu.cn或其他邮件服务器作为SMTP服务器）【程序源代码】SMTPClientDemo.javaimportjava.io.*;importjava.net.*;importjava.util.*;//Chapter8,Listing1publicclassSMTPClientDemo{protectedintport=25;protectedStringhostname="localhost";protectedStringfrom="";protectedStringto="";protectedStringsubject="";protectedStringbody="";protectedSocketsocket;protectedBufferedReaderbr;protectedPrintWriterpw;//ConstructsanewinstanceoftheSMTPClientpublicSMTPClientDemo()throwsException{try{getInput();sendEmail();}catch(Exceptione){System.out.println("Errorsendingmessage-"+e);}}publicstaticvoidmain(String[]args)throwsException{//StarttheSMTPclient,soitcansendmessagesSMTPClientDemoclient=newSMTPClientDemo();}//ChecktheSMTPresponsecodeforanerrormessageprotectedintreadResponseCode()throwsException{Stringline=br.readLine();System.out.println("<"+line);line=line.substring(0,line.indexOf(""));returnInteger.parseInt(line);}//WriteaprotocolmessagebothtothenetworksocketandtothescreenprotectedvoidwriteMsg(Stringmsg)throwsException{pw.println(msg);pw.flush();System.out.println(">"+msg);}//Closeallreaders,streamsandsocketsprotectedvoidcloseConnection()throwsException{pw.flush();pw.close();br.close();socket.close();}//SendtheQUITprotocolmessage,andterminateconnectionprotectedvoidsendQuit()throwsException{System.out.println("SendingQUIT");writeMsg("QUIT");readResponseCode();System.out.println("ClosingConnection");closeConnection();}//SendanemailmessageviaSMTP,adheringtotheprotocolknownasRFC2821protectedvoidsendEmail()throwsException{System.out.println("Sendingmessagenow:Debugbelow");System.out.println("---------------------------------"+"-----------------------------");System.out.println("OpeningSocket");socket=newSocket(this.hostname,this.port);System.out.println("CreatingReader&Writer");br=newBufferedReader(newInputStreamReader(socket.getInputStream()));pw=newPrintWriter(newOutputStreamWriter(socket.getOutputStream()));System.out.println("Readingfirstline");intcode=readResponseCode();if(code!=220){socket.close();thrownewException("InvalidSMTPServer");}System.out.println("Sendinghelocommand");writeMsg("HELO"+InetAddress.getLocalHost().getHostName());code=readResponseCode();if(code!=250){sendQuit();thrownewException("InvalidSMTPServer");}System.out.println("Sendingmailfromcommand");writeMsg("MAILFROM:<"+this.from+">");code=readResponseCode();if(code!=250){sendQuit();thrownewException("Invalidfromaddress");}System.out.println("Sendingrcpttocommand");writeMsg("RCPTTO:<"+this.to+">");code=readResponseCode();if(code!=250){sendQuit();thrownewException("Invalidtoaddress");}System.out.println("Sendingdatacommand");writeMsg("DATA");code=readResponseCode();if(code!=354){sendQuit();thrownewException("Dataentrynotaccepted");}System.out.println("Sendingmessage");writeMsg("Subject:"+this.subject);writeMsg("To:"+this.to);writeMsg("From:"+this.from);writeMsg("");writeMsg(body);code=readResponseCode();sendQuit();if(code!=250)thrownewException("Messagemaynothavebeensentcorrectly");elseSystem.out.println("Messagesent");}//ObtaininputfromtheuserprotectedvoidgetInput()throwsException{//ReadinputfromuserconsoleStringdata=null;BufferedReaderbr=newBufferedReader(newInputStreamReader(System.in));//RequesthostnameforSMTPserverSystem.out.print("PleaseenterSMTPserverhostname:");data=br.readLine();if(data==null||data.equals(""))hostname="localhost";elsehostname=data;//Requestthesender'semailaddressSystem.out.print("PleaseenterFROMemailaddress:");data=br.readLine();from=data;//Requesttherecipient'semailaddressSystem.out.print("PleaseenterTOemailaddress:");data=br.readLine();if(!(data==null||data.equals("")))to=data;System.out.print("Pleaseentersubject:");data=br.readLine();subject=data;System.out.println("Pleaseenterplain-textmessage('.'character"+"onablanklinesignalsendofmessage):");StringBufferbuffer=newStringBuffer();//Readuntiluserentersa.onablanklineStringline=br.readLine();while(line!=null){//Checkfora'.',andonlya'.',onalineif(line.equalsIgnoreCase(".")){break;}buffer.append(line);buffer.append("\n");line=br.readLine();}buffer.append(".\n");body=buffer.toString();}}【实验结果与分析】POP3编程（参考电子讲义“网络编程参考资料-应用层.pdf”及教材“第2章Socket编程”）阅读“网络编程参考资料-应用层.pdf”中8.3.2部分，实现“POP3客户实现”的源代码（Pop3ClientDemo.java），并在机器上编译运行通过。（注：可输入城院POP3邮件服务器pop3.email.zucc.edu.cn或其他邮件服务器作为POP3服务器）【程序源代码】Pop3ClientDemo.javaimportjava.io.*;importjava.net.*;importjava.util.*;publicclassPop3ClientDemo{protectedintport=110;protectedStringhostname="localhost";protectedStringusername="";protectedStringpassword="";protectedSocketsocket;protectedBufferedReaderbr;protectedPrintWriterpw;//ConstructsanewinstanceofthePOP3clientpublicPop3ClientDemo()throwsException{try{//GetuserinputgetInput();//GetmailmessagesdisplayEmails();}catch(Exceptione){System.err.println("Erroroccured-detailsfollow");e.printStackTrace();System.out.println(e.getMessage());}}//ReturnsTRUEifPOPresponseindicatessuccess,FALSEiffailureprotectedbooleanresponseIsOk()throwsException{Stringline=br.readLine();System.out.println("<"+line);//和SMTP不同的地方，POP3的回覆不再是一个number而是//+OK来代 表 关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf 要求成功。失败则以-ERR来代表。returnline.toUpperCase().startsWith("+OK");}//ReadsalinefromthePOPserver,anddisplaysittoscreenprotectedStringreadLine(booleandebug)throwsException{Stringline=br.readLine();//Appenda"+msg);}//Closeallwriters,streamsandsocketsprotectedvoidcloseConnection()throwsException{pw.flush();pw.close();br.close();socket.close();}//SendtheQUITcommand,andcloseconnectionprotectedvoidsendQuit()throwsException{System.out.println("SendingQUIT");writeMsg("QUIT");readLine(true);System.out.println("ClosingConnection");closeConnection();}//DisplayemailsinamessageprotectedvoiddisplayEmails()throwsException{BufferedReaderuserinput=newBufferedReader(newInputStreamReader(System.in));System.out.println("Displayingmailboxwithprotocolcommands"+"andresponsesbelow");System.out.println("-----------------------------------------"+"---------------------");//OpenaconnectiontoPOP3serverSystem.out.println("OpeningSocket");socket=newSocket(this.hostname,this.port);br=newBufferedReader(newInputStreamReader(socket.getInputStream()));pw=newPrintWriter(newOutputStreamWriter(socket.getOutputStream()));//Ifresponsefromserverisnotokayif(!responseIsOk()){socket.close();thrownewException("InvalidPOP3Server");}//LoginbysendingUSERandPASScommandsSystem.out.println("Sendingusername");writeMsg("USER"+this.username);if(!responseIsOk()){sendQuit();thrownewException("Invalidusername");}System.out.println("Sendingpassword");writeMsg("PASS"+this.password);if(!responseIsOk()){sendQuit();thrownewException("Invalidpassword");}//Getmailcountfromserver....System.out.println("Checkingmail");writeMsg("STAT");//...andparsefornumberofmessagesStringline=readLine(true);StringTokenizertokens=newStringTokenizer(line,"");//+OKtokens.nextToken();//numberofmessagesintmessages=Integer.parseInt(tokens.nextToken());//sizeofallmessagesintmaxsize=Integer.parseInt(tokens.nextToken());if(messages==0){System.out.println("Therearenomessages.");sendQuit();return;}System.out.println("Thereare"+messages+"messages.");System.out.println("Pressentertocontinue.");userinput.readLine();for(inti=1;i<=messages;i++){System.out.println("Retrievingmessagenumber"+i);writeMsg("RETR"+i);System.out.println("--------------------");line=readLine(false);while(line!=null&&!line.equals(".")){line=readLine(false);}System.out.println("--------------------");System.out.println("Pressentertocontinue.Tostop,"+"typeQthenenter");Stringresponse=userinput.readLine();if(response.toUpperCase().startsWith("Q"))break;}sendQuit();}publicstaticvoidmain(String[]args)throwsException{Pop3ClientDemoclient=newPop3ClientDemo();}//ReaduserinputprotectedvoidgetInput()throwsException{Stringdata=null;BufferedReaderbr=newBufferedReader(newInputStreamReader(System.in));System.out.print("PleaseenterPOP3serverhostname:");data=br.readLine();if(data==null||data.equals(""))hostname="localhost";elsehostname=data;System.out.print("Pleaseentermailboxusername:");data=br.readLine();if(!(data==null||data.equals("")))username=data;System.out.print("Pleaseentermailboxpassword:");data=br.readLine();if(!(data==null||data.equals("")))password=data;}}【实验结果与分析】Ethereal抓包分析用Ethereal软件截获上面两个程序运行时客户机和服务器之间发送的数据包，并且根据截获的数据包内容进行分析。【实验结果与分析】host10.66.19.27tcpport25SMTP数据包结构下面的 表格 关于规范使用各类表格的通知入职表格免费下载关于主播时间做一个表格详细英语字母大小写表格下载简历表格模板下载 的值取自图中选中的数据包：前32位长度16位16位字段SourceportDestinationport值358825第2、3个32位：长度32位32位字段SequencenumberAcknowledgementnumber值82126下一个16位:1b（1位）长度4位6位1位1位1位1位1位1位字段HeaderlengthReservedURGACKPSHRSTSYNFIN值200011000再下一个32位：长度16位16位字段WindowsizeChecksum值654100x4336host10.66.19.27tcpport110Pop3数据包结构下面的表格的值取自图中选中的数据包：前32位长度16位16位字段SourceportDestinationport值3629110第2、3个32位：长度32位32位字段SequencenumberAcknowledgementnumber值166下一个16位:1b（1位）长度4位6位1位1位1位1位1位1位字段HeaderlengthReservedURGACKPSHRSTSYNFIN值200011000再下一个32位：长度16位16位字段WindowsizeChecksum值654700x2a01三.讨论、 心得 信息技术培训心得 下载关于七一讲话心得体会关于国企改革心得体会关于使用希沃白板的心得体会国培计划培训心得体会 记录实验感受、上机过程中遇到的困难及解决办法、遗留的问题、意见和建议等。