using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Net;
using System.Web;
using HtmlAgilityPack;
using System.Text.RegularExpressions;
using System.IO;
namespace Pmars
{
class JingDong
{
//得到京东页面的编码格式
static Encoding encoding = Encoding.GetEncoding("gb2312");
//如果知道某件商品的ID,我们如何得到这件商品的价格
public static double GetPrice(string id)
{
double price = 0;
//第一种方式
//详细查看以前发过的图片识别的博客,利用识别京东价格图片的方法去获得商品的价格
price = GetPriceByImage(id);
//第二种方式
//虽然京东的价格被做成了图片的模式,但是,在购物车或者在结算的时候的价格不是图片的
//这样我们就可以想办法得到那里的价格就可以了
//实验证明,在获得购物车或者结算时的页面需要cookie
//那么,我们可以去下载另一个页面,之后记录cookie就可以解决问题了
//这里,定义一个类去继承WebClient,用来记录前后的cookie
price = GetPriceByCookie(id);
//第三种方式
//虽然京东在价格上做了很多的手脚,但是我们可以变相的采用其他的方式来处理
//比如,我们发现,京东有手机商城,这样,我们在手机商场上做了查看
//发现,手机商城根本就不用Cookie,而是直接下载页面就可以得到数据
//好吧,看下面的程序就可以了
price = GetPriceByMobile(id);
return price;
}
private static double GetPriceByImage(string id)
{
//京东的商品的Id是独一无二的,也就是说,每个Id标示了一件商品的内容页
//得到京东商品的下载页面
string downUrl = "http://www.360buy.com/product/"+id+".html";
//下载京东的商品内容页面,主要是为了下载图片
byte[] bytes = new WebClient().DownloadData(downUrl);
//通过编码得到页面的内容string,用HttpUtility.HtmlDecode解码
string content = HttpUtility.HtmlDecode(encoding.GetString(bytes));
//利用HtmlAgilityPack来加载分析Html页面内容
HtmlDocument htmlDoc = new HtmlDocument();
htmlDoc.LoadHtml(content);
//得到需要下载的价格图片节点
var imgNode = htmlDoc.DocumentNode.SelectSingleNode(@"//strong[@class='price']/img");
//得到需要下载的图片地址,需要用当前的页面地址去拼接一下,否则有可能是部分地址
string imgUrl = new Uri(new Uri(downUrl),imgNode.Attributes["src"].Value).AbsoluteUri;
//下载图片,放到Images文件夹下
//生成图片的地址,@"Images/" + 生成一个Guid以保证他们的名字都是不同的 + 图片的格式
string imgPath = @"Images/" + Guid.NewGuid().ToString().Replace("-", "") + imgUrl.Substring(imgUrl.LastIndexOf('.'));
//下载图片
new WebClient().DownloadFile(imgUrl, imgPath);
//分析图片,得到商品的价格
JingdongImage jdImage = new JingdongImage();
string priceStr = jdImage.GetPicNum(imgPath);
//定义一个匹配double的正则,从价格字符串中得到价格
//更简单的方法就是priceStr = priceStr.SubString(1);//去掉第一个¥字符
Regex doublePattern = new Regex(@"\d+(\.\d+)?", RegexOptions.Compiled);
string dbPrice = doublePattern.Match(priceStr).Value;
double price = 0;
if(double.TryParse(dbPrice,out price))
return price;
return 0;
}
private static double GetPriceByCookie(string id)
{
//京东的商品的Id是独一无二的,也就是说,每个Id标示了一件商品的内容页
//得到京东商品的加入购物车的链接,用程序来模仿人来将商品加入到购物车里面去
//加入购物车的链接
string goUrl = "http://jd2008.360buy.com/purchase/InitCart.aspx?pid=" + id + "&pcount=1&ptype=1";
//定义一个CookieWebClient类来达到记录Cookie的效果
CookieWebClient client = new CookieWebClient();
//去下载一个页面来记录Cookie
client.DownloadData(goUrl);
//得到结算页面的页面的Url
string shopUrl = "http://jd2008.360buy.com/purchase/shoppingcart_pop.aspx";
//下载得到结算页面的数据
byte[] bytes = client.DownloadData(shopUrl);
string content = HttpUtility.HtmlDecode(encoding.GetString(bytes));
//利用HtmlAgilityPack来加载分析Html页面内容
HtmlDocument htmlDoc = new HtmlDocument();
htmlDoc.LoadHtml(content);
//得到商品价格的节点
var priceNode = htmlDoc.DocumentNode.SelectSingleNode(@"//span[@class='price'][@id='cartBottom_price']");
if (priceNode == null)//节点查找失败
return 0;
//得到商品的价格string,去掉第一个字符¥
string priceStr = priceNode.InnerText.Substring(1);
double price = 0;
if (double.TryParse(priceStr, out price))
return price;
return 0;
}
private static double GetPriceByMobile(string id)
{
//京东的商品的Id是独一无二的,也就是说,每个Id标示了一件商品的内容页
//得到京东商品的下载页面
string downUrl = "http://m.360buy.com/cart/add.action?wareId=" + id;
//下载京东的商品内容页面,主要是为了下载图片
byte[] bytes = new WebClient().DownloadData(downUrl);
//注意手机商城里面的Encoding是UTF8的
//通过编码得到页面的内容string,用HttpUtility.HtmlDecode解码
string content = HttpUtility.HtmlDecode(Encoding.UTF8.GetString(bytes));
//利用HtmlAgilityPack来加载分析Html页面内容
HtmlDocument htmlDoc = new HtmlDocument();
htmlDoc.LoadHtml(content);
//得到价格节点
var priceNode = htmlDoc.DocumentNode.SelectSingleNode(@"//div[@class='p-price']/strong[@class='flk31'][3]");
if (priceNode == null)//节点查找失败
return 0;
//得到商品的价格string,去掉第一个字符¥
string priceStr = priceNode.InnerText;
double price = 0;
if (double.TryParse(priceStr, out price))
return price;
return 0;
}
}
class CookieWebClient : WebClient
{
private CookieContainer m_container = new CookieContainer();
protected override WebRequest GetWebRequest(Uri address)
{
WebRequest request = base.GetWebRequest(address);
if (request is HttpWebRequest)
{
(request as HttpWebRequest).CookieContainer = m_container;
}
return request;
}
}
class MyImage
{
//需要进行分析的图片
private Bitmap bmpobj;
//需要继承并且重写的数字比对串,在子类里面需要用到这个去比对数字
public Dictionary<string, char> numDic = new Dictionary<string, char>();
//得到图片中某一点的灰度数值
private int GetGrayNumColor(System.Drawing.Color posClr)
{
return (posClr.R * 19595 + posClr.G * 38469 + posClr.B * 7472) >> 16;
}
//进行灰度处理
private void GrayByPixels()
{
for (int i = 0; i < bmpobj.Height; i++)
{
for (int j = 0; j < bmpobj.Width; j++)
{
int tmpValue = GetGrayNumColor(bmpobj.GetPixel(j, i));
bmpobj.SetPixel(j, i, Color.FromArgb(tmpValue, tmpValue, tmpValue));
}
}
}
//得到一个图片的01代码序列
private string GetSingleBmpCode(Bitmap singlepic, int dgGrayValue)
{
Color piexl;
string code = "";
for (int posy = 0; posy < singlepic.Height; posy++)
for (int posx = 0; posx < singlepic.Width; posx++)
{
piexl = singlepic.GetPixel(posx, posy);
if (piexl.R < dgGrayValue) // Color.Black )
code = code + "1";
else
code = code + "0";
}
return code;
}
//从一个图片里面得到几个分开的数字小图片
private Bitmap[] GetPicValidByValue(int dgGrayValue)
{
List<Bitmap> PicList = new List<Bitmap>();
Rectangle cloneRect;
int posx1 = bmpobj.Width, posy1 = bmpobj.Height, posx2 = 0, posy2 = 0;
bool cut = false; int last = -1, lastx = 0;
for (int j = 0; j < bmpobj.Width; j++) //找有效区
{
cut = false;
for (int i = 0; i < bmpobj.Height; i++)
{
int pixelValue = bmpobj.GetPixel(j, i).R;
if (pixelValue < dgGrayValue) //根据灰度值
{
if (posx1 > j) posx1 = j;
if (posy1 > i) posy1 = i;
if (posx2 < j) posx2 = j;
if (posy2 < i) posy2 = i;
cut = true;
}
};
if (cut)
continue;
if (last + 1 == j)
{
last++;
continue;
}
cloneRect = new Rectangle(posx1, posy1, posx2 - posx1 + 1, posy2 - posy1 + 1);
lastx = j; last = j; posx1 = bmpobj.Width; posy1 = bmpobj.Height; posx2 = 0; posy2 = 0;
PicList.Add(bmpobj.Clone(cloneRect, bmpobj.PixelFormat));//复制小块图
};
return PicList.ToArray();
}
//得到一个图片的数字串
private string GetPicNumber()
{
GrayByPixels(); //灰度处理
Bitmap[] pics = GetPicValidByValue(128); //得到有效值
StringBuilder sb = new StringBuilder();
char c;
for (int i = 0; i < pics.Length; ++i)
{
string code = GetSingleBmpCode(pics[i], 128); //得到代码串
if (numDic.TryGetValue(code, out c))
{
sb.Append(c);
}
}
return sb.ToString();
}
//外部调用,得到一个图片的数字串
public string GetPicNum(Bitmap pic)
{
bmpobj = new Bitmap(pic); //转换为Format32bppRgb
return GetPicNumber();
}
//外部调用,得到一个图片的数字串(重载)
public string GetPicNum(string fileName)
{
bmpobj = new Bitmap(fileName);
return GetPicNumber();
}
//输出在一幅图里面找到的数字,测试或者找到数字比对串时用
private void TestNumber()
{
GrayByPixels(); //灰度处理
Bitmap[] pics = GetPicValidByValue(128); //得到有效值
for (int i = 0; i < pics.Length; ++i)
{
string code = GetSingleBmpCode(pics[i], 128); //得到代码串
Console.WriteLine(i);
Console.WriteLine(code);
}
}
//外部调用,输出在一幅图里面找到的数字,测试或者找到数字比对串时用
public void TestNum(Bitmap pic)
{
bmpobj = new Bitmap(pic); //转换为Format32bppRgb
TestNumber();
}
//外部调用,输出在一幅图里面找到的数字,测试或者找到数字比对串时用(重载)
public void TestNum(string fileName)
{
bmpobj = new Bitmap(fileName);
TestNumber();
}
}
class JingdongImage : MyImage
{
public JingdongImage()
{
numDic.Add("111100001111011000000110001100001100000110011000000011110000000011110000000001100000000001100000001111111100000001100000000001100000000001100000000001100000000011110000", '¥');
numDic.Add("001111100011000110110000011110000011110000011110000011110000011110000011110000011011000110001111100", '0');
numDic.Add("001100111100001100001100001100001100001100001100001100001100111111", '1');
numDic.Add("011111100110000110110000011000000011000000110000001100000011000000110000001100000011000000111111111", '2');
numDic.Add("011111100110000110110000011000000011000000110000111100000000110000000011110000011110000110011111100", '3');
numDic.Add("00000011000000011100000010110000010011000010001100010000110010000011001111111111000000110000000011000000001100", '4');
numDic.Add("011111111011000000011000000011000000011111100000000110000000011000000011110000011110000110011111100", '5');
numDic.Add("000111110001100000011000000110000000110111100111000110110000011110000011110000011011000110001111100", '6');
numDic.Add("111111111000000011000000110000000110000001100000001100000011000000011000000110000000110000001100000", '7');
numDic.Add("001111100011000110110000011110000011011000110001111100011000110110000011110000011011000110001111100", '8');
numDic.Add("001111100011000110110000011110000011110000011011000111001111011000000011000000110000001100011111000", '9');
numDic.Add("111111", '.');
}
}
}