这是一个跨平台、高性能、轻量级的爬虫软件，采用C#开发。
DESIGNDEVELOPENVIROMENTVisualStudio2015update3orlater
VisualStudio2015Tools(Preview2)
.NETCoreSDK
OPTIONALENVIROMENTIfyouwanttosavedatatomysql.
Ifyouwanttorundistributedcrawler.
MSSQL.
SAMPLESPlease see the Projet DotnetSpider.Sample in the solution.BASEUSAGECrawlerpagestraversal
public static void CrawlerPagesTraversal() { // 定义要采集的 Site 对象, 可以设置 Header、Cookie、代理等 var site = new Site { EncodingName = "UTF-8", RemoveOutboundLinks = true }; // Set start/seed url site.AddStartUrl("https://www.cnblogs.com/"); Spider spider = Spider.Create(site, // crawler identity "cnblogs_" + DateTime.Now.ToString("yyyyMMddhhmmss"), // use memoery queue scheduler new QueueDuplicateRemovedScheduler(), // default page processor will save whole html, and extract urls to target urls via regex new DefaultPageProcessor("cnblogs\\.com")) // save crawler result to file in the folder: \{running directory}\data\{crawler identity}\{guid}.dsd .AddPipeline(new FilePipeline()) // dowload html by http client .SetDownloader(new HttpClientDownloader()) // 4 threads 4线程 .SetThreadNum(4); // traversal deep 遍历深度 spider.Deep = 3; // stop crawler if it can't get url from the scheduler after 30000 ms 当爬虫连续30秒无法从调度中心取得需要采集的链接时结束. spider.EmptySleepTime = 30000; // start crawler 启动爬虫 spider.Run(); }Custmizeprocessorandpipeline
public static void CustmizeProcessorAndPipeline() { // Config encoding, header, cookie, proxy etc... 定义采集的 Site 对象, 设置 Header、Cookie、代理等 var site = new Site { EncodingName = "UTF-8", RemoveOutboundLinks = true }; for (int i = 1; i < 5; ++i) { // Add start/feed urls. 添加初始采集链接 site.AddStartUrl("https://" + $"www.youku.com/v_olist/c_97_g__a__sg__mt__lg__q__s_1_r_0_u_0_pt_0_av_0_ag_0_sg__pr__h__d_1_p_{i}.html"); } Spider spider = Spider.Create(site, // use memoery queue scheduler. 使用内存调度 new QueueDuplicateRemovedScheduler(), // use custmize processor for youku 为优酷自定义的 Processor new YoukuPageProcessor()) // use custmize pipeline for youku 为优酷自定义的 Pipeline .AddPipeline(new YoukuPipeline()) // dowload html by http client .SetDownloader(new HttpClientDownloader()) // 1 thread .SetThreadNum(1); spider.EmptySleepTime = 3000; // Start crawler 启动爬虫 spider.Run(); } public class YoukuPipeline : BasePipeline { private static long count = 0; public override void Process(ResultItems resultItems) { foreach (YoukuVideo entry in resultItems.Results["VideoResult"]) { count++; Console.WriteLine($"[YoukuVideo {count}] {entry.Name}"); } // Other actions like save data to DB. 可以自由实现插入数据库或保存到文件 } } public class YoukuPageProcessor : BasePageProcessor { protected override void Handle(Page page) { // 利用 Selectable 查询并构造自己想要的数据对象 var totalVideoElements = page.Selectable.SelectList(Selectors.XPath("//div[@class='yk-pack pack-film']")).Nodes(); Listresults = new List(); foreach (var videoElement in totalVideoElements) { var video = new YoukuVideo(); video.Name = videoElement.Select(Selectors.XPath(".//img[@class='quic']/@alt")).GetValue(); results.Add(video); } // Save data object by key. 以自定义KEY存入page对象中供Pipeline调用 page.AddResultItem("VideoResult", results); // Add target requests to scheduler. 解析需要采集的URL foreach (var url in page.Selectable.SelectList(Selectors.XPath("//ul[@class='yk-pages']")).Links().Nodes()) { page.AddTargetRequest(new Request(url.GetValue(), null)); } } } public class YoukuVideo { public string Name { get; set; } }ADDITIONALUSAGEConfigurableEntitySpiderpublic class JdSkuSampleSpider : EntitySpiderBuilder{ protected override EntitySpider GetEntitySpider() { EntitySpider context = new EntitySpider(new Site { //HttpProxyPool = new HttpProxyPool(new KuaidailiProxySupplier("快代理API")) }); context.SetThreadNum(1); context.SetIdentity("JD_sku_store_test_" + DateTime.Now.ToString("yyyy_MM_dd_hhmmss")); // save data to mysql. context.AddEntityPipeline(new MySqlEntityPipeline("Database='test';Data Source=localhost;User ID=root;Password=1qazZAQ!;Port=3306")); // dowload html by http client context.SetDownloader(new HttpClientDownloader()) context.AddStartUrl("https://list.jd.com/list.html?cat=9987,653,655&page=2&JL=6_0_0&ms=5#J_main", new Dictionary{ { "name", "手机" }, { "cat3", "655" } }); context.AddEntityType(typeof(Product)); return context; } [Schema("test", "sku", TableSuffix.Today)] [EntitySelector(Expression = "//li[@class='gl-item']/div[contains(@class,'j-sku-item')]")] [Indexes(Index = new[] { "category" }, Unique = new[] { "category,sku", "sku" })] [TargetUrlsSelector(XPaths = new[] { "//span[@class=\"p-num\"]" }, Patterns = new[] { @"&page=[0-9]+&" })] public class Product : ISpiderEntity { [StoredAs("sku", DataType.String, 25)] [PropertySelector(Expression = "./@data-sku")] public string Sku { get; set; } [StoredAs("category", DataType.String, 20)] [PropertySelector(Expression = "name", Type = SelectorType.Enviroment)] public string CategoryName { get; set; } [StoredAs("cat3", DataType.String, 20)] [PropertySelector(Expression = "cat3", Type = SelectorType.Enviroment)] public int CategoryId { get; set; } [StoredAs("url", DataType.Text)] [PropertySelector(Expression = "./div[1]/a/@href")] public string Url { get; set; } [StoredAs("commentscount", DataType.String, 32)] [PropertySelector(Expression = "./div[5]/strong/a")] public long CommentsCount { get; set; } [StoredAs("shopname", DataType.String, 100)] [PropertySelector(Expression = ".//div[@class='p-shop']/@data-shop_name")] public string ShopName { get; set; } [StoredAs("name", DataType.String, 50)] [PropertySelector(Expression = ".//div[@class='p-name']/a/em")] public string Name { get; set; } [StoredAs("venderid", DataType.String, 25)] [PropertySelector(Expression = "./@venderid")] public string VenderId { get; set; } [StoredAs("jdzy_shop_id", DataType.String, 25)] [PropertySelector(Expression = "./@jdzy_shop_id")] public string JdzyShopId { get; set; } [StoredAs("run_id", DataType.Date)] [PropertySelector(Expression = "Monday", Type = SelectorType.Enviroment)] public DateTime RunId { get; set; } [PropertySelector(Expression = "Now", Type = SelectorType.Enviroment)] [StoredAs("cdate", DataType.Time)] public DateTime CDate { get; set; } }}public static void Main(){ JdSkuSampleSpider spider = new JdSkuSampleSpider(); spider.Run();}WebDriverSupportWhenyouwanttocollectapageJSloaded,thereisonlyonethingtodo,setthedownloadertoWebDriverDownloader.
context.SetDownloader(new WebDriverDownloader(Browser.Chrome));orspider.SetDownloader(new WebDriverDownloader(Browser.Chrome));
NOTE:
MakesurethereisaChromeDriver.exeinbinforlderwhenyousetBrowsertoChrome.YoucancontainittoyourprojectviaNUGETmanager:Chromium.ChromeDriver
Makesureyoualreadyadda*.webdriverFirefoxprofilewhenyousetBrowsertoFirefox: https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles
MakesurethereisaPhantomJS.exeinbinfolderwhenyousetBrowsertoPhantomJS.YoucancontainittoyourprojectviaNUGETmanager:PhantomJS
MonitorSetlogAndStatusConnectStringtocorrectmysqlconnectstringinconfig.iniprojectDotnetSpider.Sample.
UpdateMySqlConnectStringinappsettings.jsoninDotnetSpider.Enterpiseproject.
NOTICEwhenyouuseredisscheduler,pleaseupdateyourredisconfig:timeout 0 tcp-keepalive 60
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