DotnetSpider

DotnetSpider, a .NET Standard web crawling library. It is lightweight, efficient and fast high-level web crawling & scraping framework

DESIGN

DEVELOP ENVIROMENT

1. Visual Studio 2017 (15.3 or later) or Jetbrains Rider

2. .NET Core 2.2 or later

3. Docker

4. MySql

    docker run --name mysql -d -p 3306:3306 --restart always -e MYSQL_ROOT_PASSWORD=1qazZAQ! mysql:5.7
   

5. Redis (option)

    docker run --name redis -d -p 6379:6379 --restart always redis
   

6. SqlServer

    docker run --name sqlserver -d -p 1433:1433 --restart always  -e 'ACCEPT_EULA=Y' -e 'SA_PASSWORD=1qazZAQ!' mcr.microsoft.com/mssql/server:2017-latest
   

7. PostgreSQL (option)

    docker run --name postgres -d  -p 5432:5432 --restart always -e POSTGRES_PASSWORD=1qazZAQ! postgres
   

8. MongoDb (option)

    docker run --name mongo -d -p 27017:27017 --restart always mongo
   

9. Kafka

   docker run -d --restart always --name kafka-dev -p 2181:2181 -p 3030:3030 -p 8081-8083:8081-8083 \
          -p 9581-9585:9581-9585 -p 9092:9092 -e ADV_HOST=192.168.1.157 \
          landoop/fast-data-dev:latest
   

10. Docker remote api for mac

    docker run -d  --restart always --name socat -v /var/run/docker.sock:/var/run/docker.sock -p 2376:2375 bobrik/socat TCP4-LISTEN:2375,fork,reuseaddr UNIX-CONNECT:/var/run/docker.sock
    

11. HBase

    docker run -d --restart always --name hbase -p 20550:8080 -p 8085:8085 -p 9090:9090 -p 9095:9095 -p 16010:16010 dajobe/hbase                           
    

MORE DOCUMENTS

https://github.com/dotnetcore/DotnetSpider/wiki

SAMPLES

Please see the Project DotnetSpider.Sample in the solution.

BASE USAGE

Base usage Codes

ADDITIONAL USAGE: Configurable Entity Spider

View complete Codes

public class EntitySpider : Spider
{
	public EntitySpider(SpiderParameters parameters) : base(parameters)
	{
	}
	
	protected override void Initialize()
	{
		NewGuidId();
		Scheduler = new QueueDistinctBfsScheduler();
		Speed = 1;
		Depth = 3;
		AddDataFlow(new DataParser<CnblogsEntry>()).AddDataFlow(GetDefaultStorage());
		AddRequests(
			new Request("https://news.cnblogs.com/n/page/1/", new Dictionary<string, string> {{"网站", "博客园"}}),
			new Request("https://news.cnblogs.com/n/page/2/", new Dictionary<string, string> {{"网站", "博客园"}}));
	}

	[Schema("cnblogs", "news")]
	[EntitySelector(Expression = ".//div[@class='news_block']", Type = SelectorType.XPath)]
	[GlobalValueSelector(Expression = ".//a[@class='current']", Name = "类别", Type = SelectorType.XPath)]
	[FollowSelector(XPaths = new[] {"//div[@class='pager']"})]
	public class CnblogsEntry : EntityBase<CnblogsEntry>
	{
		protected override void Configure()
		{
			HasIndex(x => x.Title);
			HasIndex(x => new {x.WebSite, x.Guid}, true);
		}

		public int Id { get; set; }

		[Required]
		[StringLength(200)]
		[ValueSelector(Expression = "类别", Type = SelectorType.Enviroment)]
		public string Category { get; set; }

		[Required]
		[StringLength(200)]
		[ValueSelector(Expression = "网站", Type = SelectorType.Enviroment)]
		public string WebSite { get; set; }

		[StringLength(200)]
		[ValueSelector(Expression = "//title")]
		[ReplaceFormatter(NewValue = "", OldValue = " - 博客园")]
		public string Title { get; set; }

		[StringLength(40)]
		[ValueSelector(Expression = "GUID", Type = SelectorType.Enviroment)]
		public string Guid { get; set; }

		[ValueSelector(Expression = ".//h2[@class='news_entry']/a")]
		public string News { get; set; }

		[ValueSelector(Expression = ".//h2[@class='news_entry']/a/@href")]
		public string Url { get; set; }

		[ValueSelector(Expression = ".//div[@class='entry_summary']", ValueOption = ValueOption.InnerText)]
		public string PlainText { get; set; }

		[ValueSelector(Expression = "DATETIME", Type = SelectorType.Enviroment)]
		public DateTime CreationTime { get; set; }
	}
}

Distributed spider

Read this document

WebDriver Support

When you want to collect a page JS loaded, there is only one thing to do, set the downloader to WebDriverDownloader.

Downloader = new WebDriverDownloader(Browser.Chrome);

NOTE:

1. Make sure the ChromeDriver.exe is in bin folder when use Chrome, install it to your project from NUGET: Chromium.ChromeDriver
2. Make sure you already add a *.webdriver Firefox profile when use Firefox: https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles
3. Make sure the PhantomJS.exe is in bin folder when use PhantomJS, install it to your project from NUGET: PhantomJS

NOTICE

when you use redis scheduler, please update your redis config:

timeout 0
tcp-keepalive 60

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