c++ 爬虫

时间：2014-07-11 18:05:16 阅读：297 评论：0 收藏：0 [点我收藏+]

这是一个简单的c++爬虫，效率并不是很高...

 1 #include<stdio.h>
 2 int s1[1000000],s2[1000000];
 3 void fun(int a, int b)
 4 {
 5     int i,ii;
 6     bool t1,t2,t3,t4;
 7     s1[0] = s2[0] = s1[1] = s2[1] = 0;
 8     for(i=a; i <= b; i++){
 9         ii = i;
10         t1 = t2 = t3 = t4 =false;
11         while(ii != 0 ){
12             int a = ii %10;
13             if( a == 5)
14             {
15                 t1 = true;
16             }
17             else if( a == 2)
18             {
19                 t2 = true;
20             }
21             else if( a == 1)
22             {
23                 t3 = true;
24             }
25             ii = ii / 10;
26         }
27         if(t1 && t2 && t3){
28             s1[i-1] = s1[i-2] + 1;
29             ii = i;
30         while(ii != 0 ){
31             int a = ii % 10;
32             int b = (ii / 10) % 10;
33             int c = (ii / 100) % 10;
34             if( c > 0 && a == 1 && b == 2 && c ==5)
35                 t4 = true;
36             ii = ii / 10;
37         }
38         if(t4)
39             s2[i-1] = s2[i-2] + 1;
40         else 
41             s2[i-1] = s2[i-2];
42         }
43         else{
44             s2[i-1] = s2[i-2];
45             s1[i-1] = s1[i-2];
46         }
47     }
48 }
49 
50 int main()
51 {
52     int a,b,i=1;
53     fun(2,1000000);
54     while(scanf("%d%d",&a,&b) != EOF){
55         if(a == 1)
56             printf("Case %d:%d %d\n",i,s1[b-1]-s1[a-1],s2[b-1]-s2[a-1]);
57         else
58             printf("Case %d:%d %d\n",i,s1[b-1]-s1[a-2],s2[b-1]-s2[a-2]);
59         i++;
60     }
61     return 0;
62 }

 1 #include"urlThread.h"
 2 #include<QFile>
 3 #include<QMessageBox>
 4 #include<QTextStream>
 5 #include <QMainWindow>
 6 void urlThread::run()
 7 {
 8     open();
 9 }
10 
11 void urlThread::startThread()
12 {
13     start();
14 }
15 
16 //显示找到的url
17 void urlThread::open()
18 {
19     QString path = "url.txt";
20     QFile file(path);
21     if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
22        // QMessageBox::warning(this,tr("Read File"),
23         //                     tr("Cannot open file:\n%1").arg(path));
24         send("error!cannot open url.txt!");
25         return;
26     }
27     QTextStream in(&file);
28     while(in.readLine().compare("") != 0){
29         //ui->textBrowser->append(in.readLine());
30         send(q2s(in.readLine()));
31         Sleep(1);
32     }
33     file.close();
34 }

View Code

 1 #include "mainwindow.h"
 2 #include <QApplication>
 3 
 4 int main(int argc, char *argv[])
 5 {
 6     QApplication a(argc, argv);
 7     MainWindow w;
 8     w.setWindowTitle("小小爬虫");
 9     w.show();
10 
11     return a.exec();
12 }

View Code

 1 #include "mainwindow.h"
 2 #include "ui_mainwindow.h"
 3 
 4 MainWindow::MainWindow(QWidget *parent) :
 5     QMainWindow(parent),
 6     ui(new Ui::MainWindow)
 7 {
 8     ui->setupUi(this);
 9     QObject::connect(ui->start,SIGNAL(released()),this,SLOT(beginGeturl()));
10     //QObject::connect(ui->display,SIGNAL(released()),this,SLOT(open()));
11     QObject::connect(ui->display,SIGNAL(released()),&uth,SLOT(startThread()));
12     QObject::connect(&uth,&urlThread::sendMessage,this,&MainWindow::receiveMessage);
13     QObject::connect(&crawler,&Crawler::sendMessage,this,&MainWindow::receiveMessage);
14 }
15 
16 MainWindow::~MainWindow()
17 {
18     delete ui;
19 }
20 
21 void MainWindow::receiveMessage(const QString name)
22 {
23     ui->textBrowser->append(name);
24     ui->textBrowser->moveCursor(QTextCursor::End);
25 }
26 
27 void MainWindow::open()
28 {
29     QString path = "url.txt";
30     QFile file(path);
31     if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
32         QMessageBox::warning(this,tr("Read File"),
33                              tr("Cannot open file:\n%1").arg(path));
34         return;
35     }
36     QTextStream in(&file);
37     while(in.readLine().compare("") != 0){
38         //ui->textBrowser->append(in.readLine());
39         crawler.send(q2s(in.readLine()));
40     }
41     file.close();
42 }
43 
44 void MainWindow::beginGeturl()
45 {
46     //crawler = new Crawler();
47     string url = "" ,dep, filter = "www";
48     if(!ui->site->text().isEmpty())
49         url = q2s(ui->site->text());
50     crawler.addURL(url);
51     int depth = 1;
52     if(!ui->depth->text().isEmpty())
53     {
54         url = q2s(ui->depth->text());
55         depth = atoi(url.c_str());
56     }
57     if(!ui->filter->text().isEmpty())
58         filter = q2s(ui->filter->text());
59     crawler.setJdugeDomain(filter);
60     crawler.setDepth(depth);
61     crawler.startThread();
62 }

View Code

 1 #ifndef CRAWLER_H
 2 #define CRAWLER_H
 3 
 4 #include<set>
 5 #include<string>
 6 #include<queue>
 7 #include "winsock2.h"
 8 #include <iostream>
 9 #include <fstream>
10 #include <stdio.h>
11 #include<time.h>
12 #include<winsock.h>
13 #include<QThread>
14 
15 #pragma comment(lib, "ws2_32.lib")
16 using namespace std;
17 
18 bool ParseURL(const string & url, string & host, string & resource);
19 bool GetHttpResponse(const string & url, char * &response, int &bytesRead);
20 QString s2q(const string &s);
21 string q2s(const QString &s);
22 
23 #define DEFAULT_PAGE_BUF_SIZE 1000000
24 
25 class Crawler: public QThread
26 {
27     Q_OBJECT
28 private:
29     queue<string> urlWaiting;
30     set<string> urlWaitset;
31     set<string> urlProcessed;
32     set<string> urlError;
33     set<string> disallow;
34     set<string>::iterator it;
35     int numFindUrl;
36     time_t starttime, finish;
37     string filter;
38     int depth;
39 
40 public:
41     Crawler(){  filter = "\0";numFindUrl = 0;}
42     ~Crawler(){}
43     void begin();
44     void setDepth(int depth);
45     void processURL(string& strUrl);
46     void addURL(string url);
47     void log(string entry, int num);
48     void HTMLParse(string & htmlResponse, const string & host);
49     bool getRobotx(const string & url, char * &response, int &bytesRead);
50     void setJdugeDomain(const string domain);
51     long urlOtherWebsite(string url);
52     void send(string s)
53     {
54         QString qs = s2q(s);
55         emit sendMessage(qs);
56     }
57 signals:
58     void sendMessage(const QString name);
59 
60 public slots:
61         bool startThread();
62 
63 protected:
64     void run();
65 
66 };
67 #endif // CRAWLER_H

 1 #ifndef MAINWINDOW_H
 2 #define MAINWINDOW_H
 3 
 4 #include <QMainWindow>
 5 #include<QFile>
 6 #include<QMessageBox>
 7 #include<QTextStream>
 8 #include<QLineEdit>
 9 #include<QDebug>
10 #include"crawler.h"
11 #include"urlThread.h"
12 
13 namespace Ui {
14 class MainWindow;
15 }
16 
17 class MainWindow : public QMainWindow
18 {
19     Q_OBJECT
20 
21 public:
22     explicit MainWindow(QWidget *parent = 0);
23     ~MainWindow();
24     void receiveMessage(const QString name);
25 
26 public slots:
27         void beginGeturl();
28         void open();
29 
30 private:
31     Ui::MainWindow *ui;
32     Crawler crawler;
33     urlThread uth;
34 };
35 
36 #endif // MAINWINDOW_H

View Code

 1 #ifndef URLTHREAD_H
 2 #define URLTHREAD_H
 3 #include"crawler.h"
 4 
 5 class urlThread: public QThread
 6 {
 7     Q_OBJECT
 8 public slots:
 9         void startThread();
10         void open();
11         void send(string s)
12         {
13             QString qs = s2q(s);
14             emit sendMessage(qs);
15         }
16 signals:
17         void sendMessage(const QString name);
18 protected:
19         void run();
20 };
21 
22 #endif // URLTHREAD_H

View Code

  1 <?xml version="1.0" encoding="UTF-8"?>
  2 <ui version="4.0">
  3  <class>MainWindow</class>
  4  <widget class="QMainWindow" name="MainWindow">
  5   <property name="geometry">
  6    <rect>
  7     <x>0</x>
  8     <y>0</y>
  9     <width>706</width>
 10     <height>381</height>
 11    </rect>
 12   </property>
 13   <property name="windowTitle">
 14    <string>MainWindow</string>
 15   </property>
 16   <widget class="QWidget" name="centralWidget">
 17    <widget class="QLabel" name="label">
 18     <property name="geometry">
 19      <rect>
 20       <x>10</x>
 21       <y>20</y>
 22       <width>54</width>
 23       <height>21</height>
 24      </rect>
 25     </property>
 26     <property name="text">
 27      <string>初始网址：</string>
 28     </property>
 29    </widget>
 30    <widget class="QLineEdit" name="site">
 31     <property name="geometry">
 32      <rect>
 33       <x>70</x>
 34       <y>20</y>
 35       <width>151</width>
 36       <height>20</height>
 37      </rect>
 38     </property>
 39     <property name="text">
 40      <string>http://www.scut.edu.cn</string>
 41     </property>
 42    </widget>
 43    <widget class="QLabel" name="label_2">
 44     <property name="geometry">
 45      <rect>
 46       <x>230</x>
 47       <y>20</y>
 48       <width>54</width>
 49       <height>21</height>
 50      </rect>
 51     </property>
 52     <property name="text">
 53      <string>搜索深度：</string>
 54     </property>
 55    </widget>
 56    <widget class="QLineEdit" name="depth">
 57     <property name="geometry">
 58      <rect>
 59       <x>290</x>
 60       <y>20</y>
 61       <width>51</width>
 62       <height>20</height>
 63      </rect>
 64     </property>
 65     <property name="text">
 66      <string>2</string>
 67     </property>
 68    </widget>
 69    <widget class="QLabel" name="label_3">
 70     <property name="geometry">
 71      <rect>
 72       <x>360</x>
 73       <y>20</y>
 74       <width>71</width>
 75       <height>21</height>
 76      </rect>
 77     </property>
 78     <property name="text">
 79      <string>过滤字符串：</string>
 80     </property>
 81    </widget>
 82    <widget class="QLineEdit" name="filter">
 83     <property name="geometry">
 84      <rect>
 85       <x>430</x>
 86       <y>20</y>
 87       <width>71</width>
 88       <height>20</height>
 89      </rect>
 90     </property>
 91     <property name="text">
 92      <string>scut</string>
 93     </property>
 94    </widget>
 95    <widget class="QPushButton" name="start">
 96     <property name="geometry">
 97      <rect>
 98       <x>510</x>
 99       <y>20</y>
100       <width>51</width>
101       <height>23</height>
102      </rect>
103     </property>
104     <property name="text">
105      <string>开始</string>
106     </property>
107    </widget>
108    <widget class="QPushButton" name="display">
109     <property name="geometry">
110      <rect>
111       <x>570</x>
112       <y>20</y>
113       <width>61</width>
114       <height>23</height>
115      </rect>
116     </property>
117     <property name="text">
118      <string>显示url</string>
119     </property>
120    </widget>
121    <widget class="QTextBrowser" name="textBrowser">
122     <property name="geometry">
123      <rect>
124       <x>10</x>
125       <y>60</y>
126       <width>671</width>
127       <height>271</height>
128      </rect>
129     </property>
130    </widget>
131   </widget>
132   <widget class="QMenuBar" name="menuBar">
133    <property name="geometry">
134     <rect>
135      <x>0</x>
136      <y>0</y>
137      <width>706</width>
138      <height>23</height>
139     </rect>
140    </property>
141   </widget>
142   <widget class="QToolBar" name="mainToolBar">
143    <attribute name="toolBarArea">
144     <enum>TopToolBarArea</enum>
145    </attribute>
146    <attribute name="toolBarBreak">
147     <bool>false</bool>
148    </attribute>
149   </widget>
150   <widget class="QStatusBar" name="statusBar"/>
151  </widget>
152  <layoutdefault spacing="6" margin="11"/>
153  <resources/>
154  <connections/>
155 </ui>

View Code

ui文件要自己设计

bubuko.com,布布扣

爬虫还有一些小问题，抓取的url content并不完全，某些地址还有一点小问题...

貌似博客园没有上传附件的地方？还是我没找到？希望得到提示~

c++ 爬虫,布布扣,bubuko.com

c++ 爬虫

标签：style blog http color 文件 os

原文地址：http://www.cnblogs.com/george-cw/p/3833641.html

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