/// <summary>
/// 获取子分类结果
/// </summary>
/// <param name="url"></param>
/// <returns></returns>
private ChildCategoryResult GetChildCategoryResult(string url)
{
string childDataString = WebClientHelper.GetContent(url, Encoding.UTF8);
Regex reg = new Regex(categoryOption.ChildCategoriesRegex.Pattern, RegexOptions.IgnoreCase);
Match m = reg.Match(childDataString);
if (m != null)
{
string data = m.Groups[categoryOption.ChildCategoriesRegex.GroupName].Value;
return(JsonConvert.DeserializeObject <ChildCategoryResult>(data));
}
return(null);
}
/// <summary>
/// 分析要抓取的商品并写入队列
/// </summary>
private void DataAnalyzing()
{
collectorQueue = new Queue <SearchProductResult>();
//已抓取的页数
int pageNum = 0;
//下一页处理
var next = Tools.Fix <TempCategory, string, string>(f => (cat, url) =>
{
Thread.Sleep(1000);
string nextLink = null;
//是否继续抓取
bool isContinue = (searchOption.MaxSearchPages < 0 || pageNum < searchOption.MaxSearchPages) && !string.IsNullOrWhiteSpace(url);
if (isContinue)
{
//获取默认商品列表页HTML
string searchHtml = WebClientHelper.GetContent(url, searchOption.Encoding, searchOption.CookieString);
//获取下一页链接
Regex nextPageRegex = new Regex(searchOption.NextPageRegex.Pattern, RegexOptions.IgnoreCase);
//匹配下一页html
Match nextMatch = nextPageRegex.Match(searchHtml);
nextLink = nextMatch.Groups[searchOption.NextPageRegex.GroupName].Value;
if (nextLink.StartsWith("?"))
{
nextLink = url.Split('?')[0] + nextLink;
}
//捕获当前页所有商品链接
Regex productRegex = new Regex(searchOption.ItemRegex.Pattern, RegexOptions.IgnoreCase);
//匹配所有的商品区html
MatchCollection proMatchs = productRegex.Matches(searchHtml);
//将匹配到要抓取的商品信息加入队列
foreach (Match m in proMatchs)
{
collectorQueue.Enqueue(new SearchProductResult
{
SiteCatId = cat.SiteCatId,
CategoryId = cat.CategoryId,
Name = Tools.IgnoreHtmlTag(m.Groups[searchOption.ItemRegex.TitleGroupName].Value),
Link = m.Groups[searchOption.ItemRegex.LinkGroupName].Value
});
}
pageNum++;//抓取的页数+1
//存在下一页，则继续下一页数据抓取
if (!string.IsNullOrWhiteSpace(nextLink))
{
nextLink = f(cat, nextLink);
}
}
return(nextLink);
});
int catIndex = 0;
//遍历采集的分类
foreach (var cat in needCollectCategories)
{
pageNum = 0;
Writer.writeInvoke(new MessageState {
Text = $"分析“{cat.Name}”下的商品……"
});
next(cat, cat.Link);
Writer.writeInvoke(new ProgressState {
Max = needCollectCategories.Count(), Value = ++catIndex
});
Writer.writeInvoke(new MessageState {
Text = $"“{cat.Name}”下的商品分析完成！"
});
}
}
/// <summary>
/// 抓取单个商品
/// </summary>
/// <param name="searchRst"></param>
/// <returns></returns>
bool getProduct(SearchProductResult searchRst)
{
if (searchRst == null)
{
return(false);
}
#region//TODO 抓取商品数据
var detailsHtml = WebClientHelper.GetContent(searchRst.Link, detailsOption.Encoding);
if (string.IsNullOrWhiteSpace(detailsHtml))
{
return(false);
}
//商品装载数据
ProductSetupResult setup = null;
Regex setupRegex = new Regex(detailsOption.SetupRegex.Pattern, RegexOptions.IgnoreCase);
Match setupMatch = setupRegex.Match(detailsHtml);
if (setupMatch != null)
{
string setupData = setupMatch.Groups[detailsOption.SetupRegex.GroupName].Value;
setup = JsonConvert.DeserializeObject <ProductSetupResult>(setupData);
}
if (setup == null || setup.ItemDO == null)
{
return(false);
}
//定义商品ID
long productId = Tools.NewId();
//图片
Dictionary <string, string> proImgDic = new Dictionary <string, string>();//key为“商品ID_v序号”组成，value为采集的图片地址
Regex imagesRegex = new Regex(detailsOption.ImagesDataRegex.Pattern, RegexOptions.IgnoreCase);
Match imagesMatch = imagesRegex.Match(detailsHtml);
if (imagesMatch != null)
{
string imagesData = imagesMatch.Groups[detailsOption.ImagesDataRegex.GroupName].Value;
Regex singleImgRegex = new Regex(detailsOption.SingleImageRegex.Pattern, RegexOptions.IgnoreCase);
MatchCollection singleImgMatches = singleImgRegex.Matches(imagesData);
Regex removeRegex = new Regex(detailsOption.ImageSrcRemoveRegex.Pattern, RegexOptions.IgnoreCase);
int proIdx = 0;
foreach (Match m in singleImgMatches)
{
string src = m.Groups[detailsOption.SingleImageRegex.GroupName].Value.GetFullLink();
//移除缩略图标识，保留原图地址
src = removeRegex.Replace(src, "");
proImgDic.Add($"{setup.ItemDO.ItemId}_v{++proIdx}", src);
}
}
//商品描述
string desc = null;
var descHtml = WebClientHelper.GetContent(setup.Api.DescUrl, detailsOption.Encoding);
Regex descRegex = new Regex(detailsOption.DescRegex.Pattern, RegexOptions.IgnoreCase);
Match descMatch = descRegex.Match(descHtml);
if (descMatch != null)
{
desc = descMatch.Groups[detailsOption.DescRegex.GroupName].Value;
}
//描述中的图片
Dictionary <string, string> descImgDic = new Dictionary <string, string>();//key为“商品ID_d序号”组成，value为采集的图片地址
Regex descImgRegex = new Regex(detailsOption.DescImageRegex.Pattern, RegexOptions.IgnoreCase);
MatchCollection descImgMatches = descImgRegex.Matches(desc);
int descIdx = 0;
foreach (Match m in descImgMatches)
{
string src = m.Groups[detailsOption.DescImageRegex.GroupName].Value;
//当前图片标识
string currentImgTag = $"{setup.ItemDO.ItemId}_d{++descIdx}";
//将详情描述中的当前图片地址用标识符替换以占位，待上传后用新地址替换
desc = desc.Replace(src, currentImgTag);
descImgDic.Add(currentImgTag, src.GetFullLink());
}
#endregion
//下载商品展示图
proImgDic = WebClientHelper.DownloadFile(proImgDic, uploadOption.VisitAddress, uploadOption.SaveDirectory);
//下载商品描述图
descImgDic = WebClientHelper.DownloadFile(descImgDic, uploadOption.VisitAddress, uploadOption.SaveDirectory);
//将描述中的图更换为上传后的地址
foreach (var img in descImgDic)
{
//将描述中的标识符替换为上传后的图片地址
desc = desc.Replace(img.Key, img.Value);
}
#region // 解析成产品库数据
string title = setup.ItemDO.Title;
if (detailsOption.ReplaceItems.Any())
{
foreach (var rep in detailsOption.ReplaceItems)
{
title = title.Replace(rep.SourceText, rep.ReplaceTo);
desc = desc.Replace(rep.SourceText, rep.ReplaceTo);
}
}
//商品
Product product = new Product
{
BrandID = long.Parse(setup.ItemDO.BrandId),
CategoryID = searchRst.CategoryId,
CreateTime = DateTime.Now,
Intro = desc,
IsDelete = false,
mainPic = proImgDic.Values.FirstOrDefault(),
Path = searchRst.Link,
Pics = string.Join(",", proImgDic.Values),
ProductID = productId,
Properties = string.Empty,
Source = collectorType,
Title = title,
UpdateTime = DateTime.Now,
Weight = float.Parse(setup.ItemDO.Weight),
SourceProductID = long.Parse(setup.ItemDO.ItemId)
};
//SKU
ProductSku sku = new ProductSku
{
CreateTime = product.CreateTime,
IsDelete = false,
Name = product.Title,
ProductID = product.ProductID,
SalePrice = decimal.Parse(setup.Detail.DefaultItemPrice),
SkuID = Tools.NewId(),
UpdateTime = product.UpdateTime,
Weight = product.Weight
};
#endregion
#region // 保存到数据库
using (var db = new DataContext())
{
db.Product.Add(product);
db.ProductSku.Add(sku);
return(db.SaveChanges() > 0);
}
#endregion
}
