上一篇,对速卖通产品采集做了分析,包含要采集产品信息,以及如何采集这些产品信息,这一篇接着来采集实战,相关技术前篇也说过了,不废话直接开项目做。
一, 创建解决方案,编写采集代码
1. 创建解决方案“CollectorSolution”,在其中新建“Collector” 空 ASP.NET MVC 项目,解决方案结构图如下:
2.在“Collector” 项目中,分别新增“CollectingController” 控制器,以及和控制器相关的视图,并将原来默认路由 Home -》 Index 改成 Collecting -》 Index,截图如下:
RouteConfig 修改成如下:
1 using System.Web.Mvc; 2 using System.Web.Routing; 3 4 namespace Collector 5 { 6 public class RouteConfig 7 { 8 public static void RegisterRoutes(RouteCollection routes) 9 { 10 routes.IgnoreRoute("{resource}.axd/{*pathInfo}"); 11 12 routes.MapRoute( 13 name: "Default", 14 url: "{controller}/{action}/{id}", 15 defaults: new { controller = "Collecting", action = "Index", id = UrlParameter.Optional } 16 ); 17 } 18 } 19 }
3. 分别新增“CollectionViewModel” ,"CollectedProductViewModel","CollectedProductImageViewModel" 视图模型,和一个存放正则表达式的结构体:“ParseProductPatterns”,代码分别如下
1.> CollectionViewModel
1 using System.Collections.Generic; 2 3 namespace Collector.Models 4 { 5 public class CollectionViewModel 6 { 7 public CollectionViewModel() 8 { 9 ProductViews = new List<CollectedProductViewModel>(); 10 } 11 public string CollectionUrl { get; set; } 12 public IEnumerable<CollectedProductViewModel> ProductViews { get; set; } 13 } 14 }
2.> CollectedProductViewModel
1 using System.Collections.Generic; 2 3 namespace Collector.Models 4 { 5 public class CollectedProductViewModel 6 { 7 public CollectedProductViewModel() 8 { 9 ProductImages = new List<CollectedProductImageViewModel>(); 10 } 11 public string ProductName { get; set; } 12 public decimal ProductPrice { get; set; } 13 public decimal ProductDiscountPrice { get; set; } 14 public string ProductCurrency { get; set; } 15 public string ProductColor { get; set; } 16 public string ProductSize { get; set; } 17 public IEnumerable<CollectedProductImageViewModel> ProductImages { get; set; } 18 } 19 }
3.>CollectedProductImageViewModel
1 namespace Collector.Models 2 { 3 public class CollectedProductImageViewModel 4 { 5 public string ImageUrl { get; set; } 6 public int Sort { get; set; } 7 } 8 }
4.>ParseProductPatterns
namespace Collector.Models { public struct ParseProductPatterns { public static string ProductNamePattern = "(?<=<h1 class=\"product-name\" itemprop=\"name\">).*?(?=</h1>)"; public static string ProductJsnPattern = @"(?<=var skuProducts=).*?(?=;\s*var skuAttrIds=)"; public static string ProductImageJsonPattern = "(?<=window.runParams.imageBigViewURL=).*?(?=;)"; public static string ProductCurrencyPattern = "(?<=window.runParams.currencyCode=\").*?(?=\";)"; public static string ProductColorPattern = "(?<=<a data-role=\"sku\" data-sku-id=\"{0}\" id=\"sku-1-{0}\" title=\").*?(?=\")"; public static string ProductSizePattern = "(?<=<a data-role=\"sku\" data-sku-id=\"{0}\" id=\"sku-2-{0}\" href=\"javascript:void\\(0\\)\"\\s+><span>).*?(?=</)"; } }
基本上容易理解,我这里就不再一一讲解了。
4. 视图布局设计很简单,如下图
采集地址 就是速卖通产品地址,这里不支持店铺和类型采集地址。表格就是采集产品信息展示。
5. 控制器和视图代码如下
1.> CollectingController
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text.RegularExpressions; 5 using System.Web.Mvc; 6 using Collector.Models; 7 using Newtonsoft.Json.Linq; 8 using RestSharp; 9 10 namespace Collector.Controllers 11 { 12 public class CollectingController : Controller 13 { 14 // GET: Collecting 15 public ActionResult Index() 16 { 17 return View(); 18 } 19 20 [HttpPost] 21 public ActionResult Index(CollectionViewModel collectionView) 22 { 23 collectionView = ColllectWithParse(collectionView); 24 return View(collectionView); 25 } 26 27 public CollectionViewModel ColllectWithParse(CollectionViewModel collectionView) 28 { 29 if (collectionView == null || string.IsNullOrEmpty(collectionView.CollectionUrl)) 30 { 31 return collectionView; 32 } 33 var client = new RestClient(collectionView.CollectionUrl); 34 var request = new RestRequest(Method.GET); 35 var response = client.Execute(request); 36 var htmlContent = response.Content; 37 collectionView.ProductViews = ParseProducts(htmlContent); 38 return collectionView; 39 } 40 41 public IEnumerable<CollectedProductViewModel> ParseProducts(string productHtmlContent) 42 { 43 var productName = RegexMatchValue(ParseProductPatterns.ProductNamePattern, productHtmlContent); 44 var productCuurency = RegexMatchValue(ParseProductPatterns.ProductCurrencyPattern, productHtmlContent); 45 46 var productJson = RegexMatchValue(ParseProductPatterns.ProductJsnPattern, productHtmlContent); 47 48 var prodctJsonArray = JArray.Parse(productJson); 49 var products = 50 prodctJsonArray.Select(pja => 51 { 52 var colorWithSizeCode = pja["skuPropIds"].ToString().Split(‘,‘); 53 var priceJson = pja["skuVal"]; 54 var skuPrice = priceJson["skuPrice"]; 55 var price = skuPrice == null ? "0" : skuPrice.ToString(); 56 var actSkuPrice = priceJson["actSkuPrice"]; 57 var discountPrice = actSkuPrice == null ? "0" : actSkuPrice.ToString(); 58 return new 59 { 60 ColorCode = colorWithSizeCode.First(), 61 SizeCode = colorWithSizeCode.Last(), 62 Price = Convert.ToDecimal(price), 63 DiscountPrice = Convert.ToDecimal(discountPrice), 64 }; 65 }).ToList(); 66 67 var collectedImages = ParseProducImages(productHtmlContent); 68 69 var collectedProducts = products.Select(p => new CollectedProductViewModel 70 { 71 ProductName = productName, 72 ProductPrice = p.Price, 73 ProductDiscountPrice = p.DiscountPrice, 74 ProductCurrency = productCuurency, 75 ProductColor = SetProductColorWithSize(ParseProductPatterns.ProductColorPattern,p.ColorCode,productHtmlContent), 76 ProductSize = SetProductColorWithSize(ParseProductPatterns.ProductSizePattern, p.SizeCode, productHtmlContent), 77 ProductImages = collectedImages 78 }).ToList(); 79 return collectedProducts; 80 } 81 82 private IEnumerable<CollectedProductImageViewModel> ParseProducImages(string productHtmlContent) 83 { 84 var imagesJson = RegexMatchValue(ParseProductPatterns.ProductImageJsonPattern, productHtmlContent); 85 var imageJsonArray = JArray.Parse(imagesJson); 86 87 var images = imageJsonArray.ToObject<List<string>>(); 88 return images.Select((t, i) => new CollectedProductImageViewModel 89 { 90 ImageUrl = t, 91 Sort = i 92 }); 93 } 94 95 private string SetProductColorWithSize(string pattern, string colorWithSizeCode,string input) 96 { 97 var newPattern = string.Format(pattern, colorWithSizeCode); 98 return RegexMatchValue(newPattern, input); 99 } 100 101 private string RegexMatchValue(string pattern, string input, RegexOptions regexOptions = RegexOptions.IgnoreCase|RegexOptions.Singleline) 102 { 103 var regex = new Regex(pattern, regexOptions); 104 var match = regex.Match(input); 105 return match.Value; 106 } 107 } 108 }
2.> Collecting->Index
1 @model Collector.Models.CollectionViewModel 2 <!DOCTYPE html> 3 4 <html> 5 <head> 6 <meta name="viewport" content="width=device-width" /> 7 <title></title> 8 <!-- CSS goes in the document HEAD or added to your external stylesheet --> 9 <style type="text/css"> 10 table.gridtable { 11 font-family: verdana,arial,sans-serif; 12 font-size: 11px; 13 color: #333333; 14 border-width: 1px; 15 border-color: #666666; 16 border-collapse: collapse; 17 } 18 19 table.gridtable th { 20 border-width: 1px; 21 padding: 8px; 22 border-style: solid; 23 border-color: #666666; 24 background-color: #dedede; 25 } 26 27 table.gridtable td { 28 border-width: 1px; 29 padding: 8px; 30 border-style: solid; 31 border-color: #666666; 32 background-color: #ffffff; 33 } 34 </style> 35 </head> 36 <body> 37 <div> 38 @using (Html.BeginForm("Index", "Collecting", FormMethod.Post)) 39 { 40 <table> 41 <tr> 42 <td>采集地址:</td> 43 <td> 44 @Html.TextAreaFor(m => m.CollectionUrl, 4, 0, new { style = "width:1500px;" }) 45 </td> 46 47 </tr> 48 <tr><td colspan="2" style="text-align: right;"><input type="submit" value="开始采集" /></td></tr> 49 </table> 50 } 51 </div> 52 <div> 53 <table class="gridtable"> 54 <thead> 55 <tr> 56 <th width="5%">编号</th> 57 <th width="5%">图片</th> 58 <th width="30%">产品名称</th> 59 60 <th width="10%">产品单价</th> 61 <th width="10%">产品参考单价</th> 62 <th width="10%">产品币别</th> 63 <th width="10%">产品颜色</th> 64 <th width="10%">产品大小</th> 65 </tr> 66 </thead> 67 <tbody> 68 @{ 69 var i = 0; 70 if (Model == null || Model.ProductViews == null) 71 { 72 return; 73 } 74 } 75 @foreach (var collectedProduct in Model.ProductViews) 76 { 77 <tr> 78 <td align="center">@{i++;}@i</td> 79 <td><img src="@collectedProduct.ProductImages.FirstOrDefault().ImageUrl" width="60" height="60" /></td> 80 <td>@collectedProduct.ProductName</td> 81 <td>@collectedProduct.ProductDiscountPrice</td> 82 <td>@collectedProduct.ProductPrice</td> 83 <td>@collectedProduct.ProductCurrency</td> 84 <td>@collectedProduct.ProductColor</td> 85 <td>@collectedProduct.ProductSize</td> 86 </tr> 87 } 88 89 </tbody> 90 91 </table> 92 </div> 93 </body> 94 </html>
这里要说明的是,本篇只是采集的冰山一角的例子,所有没有搞得很复杂,没有严格封装,不管是前端,还是后端,希望大家了解,还有本人不喜好在代码中加注释,在我看来代码就是注释。
二, 测试结果,将MVC项目,部署到IIS,端口号1005,走起看效果。
1. 测试上一篇速卖通产品地址:
http://www.aliexpress.com/store/product/Yoga-Tops-Women-Women-Yoga-Shirts-Womens-Sportswear-Gym-Woman-Running-Shirt-Camisetas-Deporte-Mujer-Gym/1025110_32620359354.html?spm=a2g01.8032156.template-section-container.27.wcM8ES&sdom=3514.555719.493653.0_32620359354
效果截图如下:
刚刚采集发现上一篇写的这个产品地址,速卖通不打折,因此没有了折扣价格。
2.再采集一个地址:
http://www.aliexpress.com/store/product/LEVEL-4-shock-Professional-running-intensive-training-without-rims-snow-sports-bra-open-front-zipper-style/1025110_32357688343.html?spm=2114.12010108.1000013.1.uvJqBj
截图如下
这个产品的产品变体有很多,所有一网页还显示不了。
源码码:https://github.com/haibozhou1011/Collector
总结:
好了,速卖通产品采集系列,就全部结束了,总的来说,采集这个活技术都是大家经常用的,主要是前期分析,抓产品信息规则,每个网站多有规律,大家留心观察就会找到一些蛛丝马迹,就会有所突破。希望大家如果有更好的采集方法,一定要和大家分享。