/// <summary> /// 构造方法 /// </summary> /// <param name="partterns">匹配目标链接的正则表达式</param> /// <param name="excludeParterns">排除目标链接的正则表达式</param> public DefaultPageProcessor(string[] partterns = null, string[] excludeParterns = null) { var targetUrlsExtractor = new RegionAndPatternTargetRequestExtractor(); if (partterns != null && partterns.Length > 0) { targetUrlsExtractor.AddTargetUrlExtractor(".", partterns); } if (excludeParterns != null && excludeParterns.Length > 0) { targetUrlsExtractor.AddExcludeTargetUrlPatterns(excludeParterns); } TargetUrlsExtractor = targetUrlsExtractor; }
public void RegionAndPatternTargetUrlsExtractor() { HttpClient client = new HttpClient(); var html = client.GetStringAsync("http://www.cnblogs.com").Result; var extracotr = new RegionAndPatternTargetRequestExtractor(".//div[@class='pager']", "/sitehome/p/\\d+", "^http://www\\.cnblogs\\.com/$"); var page = new Page(new Request("http://cnblogs.com")); page.Content = html; page.ContentType = ContentType.Html; var requets = Enumerable.ToList(extracotr.ExtractRequests(page)); Assert.Equal(11, requets.Count); Assert.Contains(requets, r => r.Url == "http://cnblogs.com/sitehome/p/2"); }
/// <summary> /// 构造方法 /// </summary> /// <param name="model">数据模型</param> /// <param name="extractor">模型解析器</param> /// <param name="targetRequestExtractor">目标链接的解析器</param> /// <param name="dataHandlers">数据处理器</param> public ModelProcessor(IModel model, IModelExtractor extractor = null, ITargetRequestExtractor targetRequestExtractor = null, params IDataHandler[] dataHandlers) { Model = model ?? throw new ArgumentNullException(nameof(model)); Extractor = extractor ?? new ModelExtractor(); if (targetRequestExtractor != null) { TargetUrlsExtractor = targetRequestExtractor; } RegionAndPatternTargetRequestExtractor regionAndPatternTargetUrlsExtractor; if (TargetUrlsExtractor == null) { regionAndPatternTargetUrlsExtractor = new RegionAndPatternTargetRequestExtractor(); TargetUrlsExtractor = regionAndPatternTargetUrlsExtractor; } else { regionAndPatternTargetUrlsExtractor = TargetUrlsExtractor as RegionAndPatternTargetRequestExtractor; } if (regionAndPatternTargetUrlsExtractor == null) { return; } if (Model.TargetRequestSelectors != null && Model.TargetRequestSelectors.Any()) { foreach (var targetUrlsSelector in Model.TargetRequestSelectors) { var patterns = targetUrlsSelector.Patterns?.Select(x => x?.Trim()).Distinct().ToArray(); var xpaths = targetUrlsSelector.XPaths?.Select(x => x?.Trim()).Distinct().ToList(); if (xpaths == null && patterns == null) { throw new SpiderException("Region xpath and patterns should not be null both"); } if (xpaths != null && xpaths.Count > 0) { foreach (var xpath in xpaths) { regionAndPatternTargetUrlsExtractor.AddTargetUrlExtractor(xpath, patterns); } } else { if (patterns != null && patterns.Length > 0) { regionAndPatternTargetUrlsExtractor.AddTargetUrlExtractor(null, patterns); } } if (targetUrlsSelector.ExcludePatterns != null) { foreach (var p in targetUrlsSelector.ExcludePatterns) { regionAndPatternTargetUrlsExtractor.ExcludeTargetUrlPatterns.Add(new Regex(p)); } } } } if (dataHandlers != null) { foreach (var datahandler in dataHandlers) { if (datahandler != null) { _dataHandlers.Add(datahandler); } } } }
public NewsProcessor() { TargetUrlsExtractor = new RegionAndPatternTargetRequestExtractor(null, "^http://www\\.cnblogs\\.com/$", "^http://www\\.cnblogs\\.com/news/$", "www\\.cnblogs\\.com/news/\\d+"); }
public BlogSumaryProcessor() { // 定义目标页的筛选 TargetUrlsExtractor = new RegionAndPatternTargetRequestExtractor(".", "^http://www\\.cnblogs\\.com/$", "http://www\\.cnblogs\\.com/sitehome/p/\\d+"); }