百度贴个代码都不方便 ，更諻论添加附件了
搬cnblogs了（囧，cnblogs开通博客还要申请）
因为图书馆迟还书要做题，故用C#写了个自动答题的软件，10秒钟答完
之所以用C#，因为C#封装了许多高级类，用来做与网络相关的程序非常方便
1.抓包分析
第一步先提交卡号，会返回一个做题的页面，
尝试做一道题，用fiddler2分析发现其提交了UserName,PayListId,RightCount,ErrorCount，QuestionCount,RepeatTimes,FinishedQuestionId,QuestionID,Answer等数据,查看网页源代码，发现其用一个hidden属性的input隐性提交的，UserName是校园卡号，Answer是答案，其他也不难推测。
2.编码
用C#最大的好处就是可以用它封装好的HttpWebRequest类HttpWebResponse类实现模拟浏览器的操作
（参考使用 HttpWebRequest 向网站提交数据）
3.注意的问题：
编码中有一个问题就是回答问题错误过半数它的RepeatTimes会加1，要求重新开始答题，如果三次答题不通过再提示重新开始。
因此有必要提高我们再题的准确性，基于此，开辟一个Directory<string,string>的对象，存储题号和答案，在开始答题前从answers.txt读入题目与答案，如果某个问题有记录再采取它的答案，否则随机生成一个答案，回答下一题之前判断这个答案是否正确，若正确则存入Directory对象中，否则排除，最后答题完毕再把Directory写入answers.txt,越后越能提高答题准确性。
虽然只限中大图书馆，但网络编程的流程大致如上
代码如下：
代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Web;
using System.IO;
using System.Collections.Generic;
using System.Threading;
namespace LIBROBOT
{
public partial class FormMain : Form
{
public FormMain()
{
InitializeComponent();
//CardNum.Text = "0000312121";
//CardNum.Text = "0000322618";
}
private void StartBtn_Click(object sender, EventArgs e)
{
String cardnum=CardNum.Text;
if (cardnum.Trim().Length != 10) {
MessageBox.Show("请输入10位证件号！");
return;
}
UserName = cardnum;
Init();
if (RightCount == null || ErrorCount == null || QuestionCount == null)
{
MessageBox.Show("您无过期记录！");
return;
}
while (!AnswerQuestion())
{
lblStatus.Text = "答错:"+ErrorCount+"道,答对:"+RightCount+"道";
}
}
private void ReadAnswers() {
RightAnswers=new Dictionary<string,string>();
StreamReader sr;
try {
sr=File.OpenText("answers.txt");
sr.ReadLine();
while (sr.Peek() != -1)
{
String str = sr.ReadLine();
string q=str.Split(':')[0];
string a=str.Split(':')[1];
RightAnswers.Add(q, a);
}
sr.Close();
}catch(Exception e){
//MessageBox.Show(e.Message);
}
}
private void WriteAnswers() {
StreamWriter sw;
sw = File.CreateText("answers.txt");
foreach(var item in RightAnswers.Keys)
{
sw.WriteLine(item + ":" + RightAnswers[item]);
}
sw.Flush();
sw.Close();
//StreamWriter sw;
}
private String GetAnswer(String QID) {
if (!RightAnswers.ContainsKey(QID))
return "1";
return RightAnswers[QID];
}
private bool AnswerQuestion() {
Thread.Sleep(10);
if (QuestionID == null) {
WriteAnswers();
MessageBox.Show("机器人学习失败导致三次未通过");
return true;
}
Answer=GetAnswer(QuestionID);
string param = "UserName=" + UserName + "&PayListId=" + PayListId
+ "&RightCount=" + RightCount + "&ErrorCount=" + ErrorCount
+ "&QuestionCount=" + QuestionCount + "&RepeatTimes=" + RepeatTimes
+ "&FinishedQuestionId=" + FinishedQuestionId + "&QuestionID=" + QuestionID
+ "&Answer=" + Answer;
byte[] bs = Encoding.ASCII.GetBytes(param);
HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create("http://202.116.65.77:8001/sysulib/html/LibEducateSystem.do?Command=CheckAnswer");
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
req.ContentLength = bs.Length;
using (Stream reqStream = req.GetRequestStream())
{
reqStream.Write(bs, 0, bs.Length);
}
HttpWebResponse res = (HttpWebResponse)req.GetResponse();
//在这里对接收到的页面内容进行处理
if (res.StatusCode != HttpStatusCode.OK)
{
MessageBox.Show("页面出错！");
return true;
}
Stream resStream = res.GetResponseStream();
StreamReader streamReader = new StreamReader(resStream, Encoding.UTF8);
// streamReader = new StreamReader(resStream, Encoding.Default);
String htmlCont = streamReader.ReadToEnd();
streamReader.Close();
res.Close();
if(htmlCont.IndexOf("完成时间")!=-1){
WriteAnswers();
MessageBox.Show("答题完毕！");
return true;
}
Parser(htmlCont, false);
return false;
}
private void Init()
{
ReadAnswers();
string param = "userName=" + UserName + "&x=49&y=19";//x,y不明所以
byte[] bs = Encoding.ASCII.GetBytes(param);
HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create("http://202.116.65.77:8001/sysulib/html/LibEducateSystem.do?Command=CheckUserStatus");
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
req.ContentLength = bs.Length;
using (Stream reqStream = req.GetRequestStream())
{
reqStream.Write(bs, 0, bs.Length);
}
HttpWebResponse res = (HttpWebResponse)req.GetResponse();
//在这里对接收到的页面内容进行处理
if (res.StatusCode != HttpStatusCode.OK)
{
MessageBox.Show("页面出错！");
return;
}
Stream resStream = res.GetResponseStream();
StreamReader streamReader = new StreamReader(resStream, Encoding.UTF8);
// streamReader = new StreamReader(resStream, Encoding.Default);
String htmlCont = streamReader.ReadToEnd();
streamReader.Close();
//分析
Parser(htmlCont,true);
res.Close();
}
private void Parser(String htmlCont,bool isInit)
{
if (!isInit)
{
if ((htmlCont.IndexOf("#FF0000") != -1) || htmlCont.IndexOf("#ff0000") != -1)
{
if (Answer == "1") Answer = "2";
else Answer = "1";
}
if (!RightAnswers.ContainsKey(QuestionID)) {
RightAnswers.Add(QuestionID, Answer);
}
}
int ptr = htmlCont.IndexOf("PayListId");
if (ptr < 0)
return;
htmlCont = htmlCont.Substring(ptr, 700);
htmlCont = htmlCont.Substring(18, htmlCont.Length - 18);
PayListId = htmlCont.Substring(0, htmlCont.IndexOf("\""));
//"PayListId\" value=\"35649\" />\n\t\t"
ptr = htmlCont.IndexOf("RightCount");
if (ptr < 0) return;
htmlCont = htmlCont.Substring(ptr, htmlCont.Length - ptr);
htmlCont = htmlCont.Substring(19, htmlCont.Length - 19);
RightCount = htmlCont.Substring(0, htmlCont.IndexOf("\""));
ptr = htmlCont.IndexOf("ErrorCount");
if (ptr < 0) return;
htmlCont = htmlCont.Substring(ptr, htmlCont.Length - ptr);
htmlCont = htmlCont.Substring(19, htmlCont.Length - 19);
ErrorCount = htmlCont.Substring(0, htmlCont.IndexOf("\""));
ptr = htmlCont.IndexOf("QuestionCount");
if (ptr < 0) return;
htmlCont = htmlCont.Substring(ptr, htmlCont.Length - ptr);
htmlCont = htmlCont.Substring(22, htmlCont.Length - 22);
QuestionCount = htmlCont.Substring(0, htmlCont.IndexOf("\""));
ptr = htmlCont.IndexOf("RepeatTimes");
if (ptr < 0) return;
htmlCont = htmlCont.Substring(ptr, htmlCont.Length - ptr);
htmlCont = htmlCont.Substring(20, htmlCont.Length - 20);
RepeatTimes = htmlCont.Substring(0, htmlCont.IndexOf("\""));
ptr = htmlCont.IndexOf("FinishedQuestionId");
if (ptr < 0) return;
htmlCont = htmlCont.Substring(ptr, htmlCont.Length - ptr);
htmlCont = htmlCont.Substring(27, htmlCont.Length - 27);
FinishedQuestionId = htmlCont.Substring(0, htmlCont.IndexOf("\""));
ptr = htmlCont.IndexOf("QuestionID");
if (ptr < 0) return;
htmlCont = htmlCont.Substring(ptr, htmlCont.Length - ptr);
htmlCont = htmlCont.Substring(19, htmlCont.Length - 19);
QuestionID = htmlCont.Substring(0, htmlCont.IndexOf("\""));
}
private String UserName;
private String PayListId;
private String RightCount;
private String ErrorCount;
private String QuestionCount;
private String RepeatTimes;
private String FinishedQuestionId;
private String QuestionID;
private String Answer;
private Dictionary<string,string> RightAnswers;//存储正确答案的临时变量
}
}