Web-based crawler .net framework, you can learn to use.

DotnetSpider-master
...................\.gitignore
...................\DotnetSpider.sln
...................\LICENSE
...................\README.md
...................\build.bat
...................\docs
...................\....\CNAME
...................\....\images
...................\....\......\createTask.jpg
...................\....\......\log.jpg
...................\....\......\nodes.jpg
...................\....\......\projects.jpg
...................\....\......\status.jpg
...................\....\......\tasks.jpg
...................\....\index.html
...................\guide.md
...................\images
...................\......\1.png
...................\......\icon.png
...................\......\test.png
...................\nuget
...................\.....\DotnetSpider.Core.nuspec
...................\.....\DotnetSpider.Extension.nuspec
...................\src
...................\...\DotnetSpider.Core.Test
...................\...\......................\CookieInjectorTest.cs
...................\...\......................\DotnetSpider.Core.Test.csproj
...................\...\......................\Downloader
...................\...\......................\..........\DownloadHanlderTest.cs
...................\...\......................\..........\HttpClientDownloaderTest.cs
...................\...\......................\..........\TestDownloader.cs
...................\...\......................\HtmlTest.cs
...................\...\......................\IocManagerTests.cs
...................\...\......................\Jd.html
...................\...\......................\PageTest.cs
...................\...\......................\Pipeline
...................\...\......................\........\FilePipelineTest.cs
...................\...\......................\........\JsonFilePipelineTest.cs
...................\...\......................\Processor
...................\...\......................\.........\TargetUrlTests.cs
...................\...\......................\Program.cs
...................\...\......................\Properties
...................\...\......................\..........\AssemblyInfo.cs
...................\...\......................\..........\launchSettings.json
...................\...\......................\RequestTest.cs
...................\...\......................\ResultItemsTest.cs
...................\...\......................\Scheduler
...................\...\......................\.........\BloomFilterDuplicateRemover.cs
...................\...\......................\.........\HashSetDuplicateRemoverTest.cs
...................\...\......................\.........\QueueSchedulerTest.cs
...................\...\......................\SelectorTest.cs
...................\...\......................\SiteTest.cs
...................\...\......................\SpiderTest.cs
...................\...\......................\TestDownloader.cs
...................\...\......................\UrlUtilsTest.cs
...................\...\......................\app.config
...................\...\......................\config.ini
...................\...\......................\nlog.config
...................\...\......................\packages.config
...................\...\DotnetSpider.Core
...................\...\.................\ContentType.cs
...................\...\.................\DefaultSpider.cs
...................\...\.................\DotnetSpider.Core.csproj
...................\...\.................\Downloader
...................\...\.................\..........\BaseDownloader.cs
...................\...\.................\..........\BeforeDownloadHandler.cs
...................\...\.................\..........\CookieInterceptor.cs
...................\...\.................\..........\Cookies.cs
...................\...\.................\..........\DownloadCompleteHandler.cs
...................\...\.................\..........\DownloadException.cs
...................\...\.................\..........\FileCookieInject.cs
...................\...\.................\..........\HttpClientDownloader.1.cs
..........

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