public Crawler Fetch() { if (!IsExternalIPAddress(this.SourceUrl)) { State = "INVALID_URL"; return(this); } var request = HttpWebRequest.Create(this.SourceUrl) as HttpWebRequest; using (var response = request.GetResponse() as HttpWebResponse) { if (response.StatusCode != HttpStatusCode.OK) { State = "Url returns " + response.StatusCode + ", " + response.StatusDescription; return(this); } if (response.ContentType.IndexOf("image") == -1) { State = "Url is not an image"; return(this); } var fileName = PathFormatter.Format(Path.GetFileName(this.SourceUrl), Config.GetString("catcherPathFormat")); try { var stream = response.GetResponseStream(); var reader = new BinaryReader(stream); using (var ms = new MemoryStream()) { byte[] buffer = new byte[4096]; int count; while ((count = reader.Read(buffer, 0, buffer.Length)) != 0) { ms.Write(buffer, 0, count); } ms.Seek(0, SeekOrigin.Begin); _uploadFolder.CreateFile(fileName, ms); ServerUrl = _uploadFolder.GetUrl(fileName); } State = "SUCCESS"; } catch (Exception e) { State = "抓取错误:" + e.Message; } return(this); } }
public override void Process() { try { Start = String.IsNullOrEmpty(Request["start"]) ? 0 : Convert.ToInt32(Request["start"]); Size = String.IsNullOrEmpty(Request["size"]) ? Config.GetInt("imageManagerListSize") : Convert.ToInt32(Request["size"]); } catch (FormatException) { State = ResultState.InvalidParam; WriteResult(); return; } var buildingList = new List <String>(); try { buildingList.AddRange(_uploadFolder.ListFiles(PathToList, SearchExtensions, Start, Size, true) .Select(x => _uploadFolder.GetUrl(x))); Total = buildingList.Count; FileList = buildingList.OrderBy(x => x).Skip(Start).Take(Size).ToArray(); } catch (UnauthorizedAccessException) { State = ResultState.AuthorizError; } catch (DirectoryNotFoundException) { State = ResultState.PathNotFound; } catch (IOException) { State = ResultState.IOError; } finally { WriteResult(); } }