TestSpider2.cs

using System;
using System.ComponentModel.DataAnnotations;
using System.Threading;
using System.Threading.Tasks;
using DotnetSpider.DataFlow.Parser;
using DotnetSpider.DataFlow.Parser.Formatters;
using DotnetSpider.DataFlow.Storage.Entity;
using DotnetSpider.Http;
using DotnetSpider.Infrastructure;
using DotnetSpider.Selector;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Serilog;

namespace DotnetSpider.Sample.samples;

public class TestSpider2(
    IOptions<SpiderOptions> options,
    DependenceServices services,
    ILogger<Spider> logger)
    : Spider(options,
        services, logger)
{
    public static async Task RunAsync()
    {
            var builder = Builder.CreateDefaultBuilder<TestSpider2>(options =>
            {
                options.Speed = 1;
            });
            builder.UseSerilog();
            await builder.Build().RunAsync();
        }

    protected override async Task InitializeAsync(CancellationToken stoppingToken)
    {
            await AddRequestsAsync(new Request($"https://news.cnblogs.com/n/page/1/"));
            AddDataFlow<DataParser<CnblogsEntity>>();
            AddDataFlow(GetDefaultStorage);
            // AddDataFlow(new HBaseStorage("http://localhost:8080"));
        }

    protected override SpiderId GenerateSpiderId()
    {
            return new(ObjectId.CreateId().ToString(), "测试爬虫 1");
        }

    [Schema("cnblogs", "news")]
    [EntitySelector(Expression = ".//div[@class='news_block']", Type = SelectorType.XPath)]
    [GlobalValueSelector(Expression = ".//a[@class='current']", Name = "类别", Type = SelectorType.XPath)]
    [FollowRequestSelector(Expressions = ["//div[@class='pager']"],
        Patterns = ["news\\.cnblogs\\.com/n/page"])]
    public class CnblogsEntity : EntityBase<CnblogsEntity>
    {
        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.Environment)]
        public string Category { get; set; }

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

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