/// <summary>
/// 创建下载器
/// </summary>
/// <param name="type">下载器类型</param>
/// <param name="start">开始时间</param>
/// <param name="end">结束时间</param>
/// <returns></returns>
public static IDownloader CreateDownloader(NewsPaperTypeEnum type, DateTime start, DateTime end)
{
IDownloader downloader = null;
switch (type)
{
case NewsPaperTypeEnum.ChinaTeacher:
downloader = new TeacherDownLoader(start, end);
break;
case NewsPaperTypeEnum.ChinaEducation:
downloader = new EducationDownLoader(start, end);
break;
}
return(downloader);
}
private List <string> GetFileNames(DateTime dateTime, NewsPaperTypeEnum type = NewsPaperTypeEnum.ChinaTeacher)
{
List <string> fileNames = new List <string>();
for (int i = 1; i <= 30; i++)
{
if (type == NewsPaperTypeEnum.ChinaTeacher)
{
fileNames.Add($"ZGJSB{i.ToString().PadLeft(2, '0')}B{dateTime.ToString("yyyyMMdd")}C.pdf");
}
else
{
fileNames.Add($"ZGJYB{dateTime.ToString("yyyyMMdd")}{i.ToString().PadLeft(2, '0')}.pdf");
}
}
return(fileNames);
}
private List <DateTime> GetTerms(DateTime start, DateTime end, NewsPaperTypeEnum type = NewsPaperTypeEnum.ChinaTeacher, List <DateTime> hasDownloadfiles = null)
{
List <DateTime> listTerm = new List <DateTime>()
{
};
string url = string.Empty;
if (type == NewsPaperTypeEnum.ChinaTeacher)
{
url = "http://www.chinateacher.com.cn/zgjsb/html/{0}/node_22.htm";
}
else if (type == NewsPaperTypeEnum.ChinaEducation)
{
url = "http://paper.jyb.cn/zgjyb/html/{0}/node_2.htm";
}
for (DateTime i = start; i <= end; i = i.AddDays(1))
{
if (hasDownloadfiles.Contains(i))
{
continue;
}
string requestUrl = string.Format(url, i.ToString("yyyy-MM/dd"));
try
{
var response = checkClient.GetAsync(requestUrl).GetAwaiter().GetResult();
if (response.StatusCode == System.Net.HttpStatusCode.OK)
{
listTerm.Add(i);
}
}
catch (Exception)
{
continue;
}
}
return(listTerm);
}
