public async Task UpdateNews(int newsid, int column, int language, string title, string subTitle, string content, bool picnews)
{
var news = await _dbContext.News.AsNoTracking().FirstOrDefaultAsync(n => n.NewsID == newsid);
if (news != null)
{
var fileName = string.Empty;
var file = _accessor.HttpContext.Request.Form.Files["file"];
if (file != null)
{
var fileExtension = Path.GetExtension(file.FileName);
fileName = $"{DateTime.Now.ToString("yyMMddHHmmssfff")}{fileExtension}";
string webRootPath = _hostingEnvironment.WebRootPath;//获取物理地址
string path = $"upload/image/{fileName}";
var memoryStream = new MemoryStream();
await file.CopyToAsync(memoryStream);
if (picnews)
{
_pictureHelper.ProcessByStream(memoryStream, new PictureSize
{
Width = 170,
Height = 130,
Mode = "Cut"
});
memoryStream.Dispose();
memoryStream = _pictureHelper.Ms;
}
byte[] bytes = new byte[memoryStream.Length];
memoryStream.Seek(0, SeekOrigin.Begin);
memoryStream.Read(bytes, 0, bytes.Length);
memoryStream.Dispose();
await File.WriteAllBytesAsync(Path.Combine(webRootPath, path), bytes);
await _uploadService.SaveToRemotePath(bytes, path);//保存到远程路径
await _uploadService.addFile(fileName, fileExtension, "News");
news.NewsImageName = fileName;
}
news.ColumnID = column;
news.Language = language;
news.Title = title;
news.SubTitle = subTitle;
news.NewsDetail = content;
_dbContext.Update(news);
await _dbContext.SaveChangesAsync();
}
}
public async Task <Crawler> Fetch(string sourceUrl)
{
this.sourceUrl = sourceUrl;
if (!IsExternalIPAddress(this.sourceUrl))
{
state = "INVALID_URL";
return(this);
}
var request = WebRequest.Create(this.sourceUrl) as WebRequest;
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);
}
serverUrl = PathFormatter.Format(Path.GetFileName(this.sourceUrl), _editorConfig.GetString("catcherPathFormat"));
//var savePath = Server.MapPath(ServerUrl);
var savePath = Path.Combine(_hostingEnvironment.WebRootPath, serverUrl);
string extension = Path.GetExtension(serverUrl);
string filename = Path.GetFileName(serverUrl);
if (!Directory.Exists(Path.GetDirectoryName(savePath)))
{
Directory.CreateDirectory(Path.GetDirectoryName(savePath));
}
try
{
byte[] uploadFileBytes = null;
WebClient webClient = new WebClient();
webClient.Credentials = CredentialCache.DefaultCredentials;
//var memoryStream = await webClient.OpenWriteTaskAsync(this.sourceUrl);
byte[] bytes = await webClient.DownloadDataTaskAsync(this.sourceUrl);
var memoryStream = new MemoryStream(bytes);
webClient.Dispose();
_pictureHelper.ProcessByStream(memoryStream, new PictureSize
{
Width = 700,
Height = 700,
Mode = "Auto"
});
memoryStream.Dispose();
memoryStream = _pictureHelper.Ms;
uploadFileBytes = new byte[memoryStream.Length];
memoryStream.Seek(0, SeekOrigin.Begin);
memoryStream.Read(uploadFileBytes, 0, uploadFileBytes.Length);
memoryStream.Dispose();
await File.WriteAllBytesAsync(savePath, uploadFileBytes);
await _uploadService.SaveToRemotePath(uploadFileBytes, serverUrl);//保存到远程路径
await _uploadService.addFile(filename, extension, "Ueditor");
state = "SUCCESS";
}
catch (Exception e)
{
state = "抓取错误：" + e.Message;
}
return(this);
}
}
public async Task Process(UploadConfig uploadConfig)
{
this._uploadConfig = uploadConfig;
byte[] uploadFileBytes = null;
string uploadFileName = null;
if (_uploadConfig.Base64)
{
uploadFileName = _uploadConfig.Base64Filename;
uploadFileBytes = Convert.FromBase64String(_accessor.HttpContext.Request.Query[_uploadConfig.UploadFieldName]);//注意可能会错
}
else
{
var file = _accessor.HttpContext.Request.Form.Files[_uploadConfig.UploadFieldName];
uploadFileName = file.FileName;
if (!CheckFileType(uploadFileName))
{
this._result.State = UploadState.TypeNotAllow;
await WriteResult();
return;
}
if (!CheckFileSize(file.Length))
{
this._result.State = UploadState.SizeLimitExceed;
await WriteResult();
return;
}
//uploadFileBytes = new byte[file.Length];
try
{
var memoryStream = new MemoryStream();
await file.CopyToAsync(memoryStream);
if (_uploadConfig.ActionName == "uploadimage")
{
_pictureHelper.ProcessByStream(memoryStream, new PictureSize
{
Width = 700,
Height = 700,
Mode = "Auto"
});
memoryStream.Dispose();
memoryStream = _pictureHelper.Ms;
}
uploadFileBytes = new byte[memoryStream.Length];
memoryStream.Seek(0, SeekOrigin.Begin);
memoryStream.Read(uploadFileBytes, 0, uploadFileBytes.Length);
memoryStream.Dispose();
//file.InputStream.Read(uploadFileBytes, 0, file.Length);
//file.OpenReadStream().Read(uploadFileBytes, 0, uploadFileBytes.Length);
}
catch (Exception)
{
_result.State = UploadState.NetworkError;
await WriteResult();
}
}
_result.OriginFileName = uploadFileName;
var savePath = PathFormatter.Format(uploadFileName, _uploadConfig.PathFormat);
string extension = Path.GetExtension(uploadFileName);
string filename = Path.GetFileName(savePath);
var localPath = Path.Combine(_hostingEnvironment.WebRootPath, savePath);
try
{
if (!Directory.Exists(Path.GetDirectoryName(localPath)))
{
Directory.CreateDirectory(Path.GetDirectoryName(localPath));
}
//File.WriteAllBytes(localPath, uploadFileBytes);
await File.WriteAllBytesAsync(localPath, uploadFileBytes);
await _uploadService.SaveToRemotePath(uploadFileBytes, savePath);//保存到远程路径
await _uploadService.addFile(filename, extension, "Ueditor");
_result.Url = savePath;
_result.State = UploadState.Success;
}
catch (Exception e)
{
_result.State = UploadState.FileAccessError;
_result.ErrorMessage = e.Message;
}
finally
{
await WriteResult();
}
}
public async Task AddPages(PageView pv)
{
if (pv.PageImg != null)
{
var fileExtension = Path.GetExtension(pv.PageImg.FileName);
var fileName = $"{DateTime.Now.ToString("yyMMddHHmmssfff")}{fileExtension}";
string webRootPath = _hostingEnvironment.WebRootPath;//获取物理地址
string path = $"upload/image/{fileName}";
//string contentRootPath = _hostingEnvironment.ContentRootPath;
var memoryStream = new MemoryStream();
await pv.PageImg.CopyToAsync(memoryStream);
if (pv.IsPicturePage)
{
_pictureHelper.ProcessByStream(memoryStream, new PictureSize
{
Width = 200,
Height = 255,
Mode = "Cut"
});
memoryStream.Dispose();
memoryStream = _pictureHelper.Ms;
}
byte[] bytes = new byte[memoryStream.Length];
// 设置当前流的位置为流的开始
memoryStream.Seek(0, SeekOrigin.Begin);
memoryStream.Read(bytes, 0, bytes.Length);
memoryStream.Dispose();
//用下面的就不需要先seek
//nv.NewsImg.OpenReadStream().Read(bytes, 0, bytes.Length);
await File.WriteAllBytesAsync(Path.Combine(webRootPath, path), bytes);
await _uploadService.SaveToRemotePath(bytes, path);//保存到远程路径
//memoryStream.Dispose();
_dbContext.Pages.Add(new Pages
{
ColumnID = int.Parse(pv.Column),
Language = (int)pv.Language,
Title = pv.Title,
PContent = pv.PContent,
PageImageName = fileName,
});
await _dbContext.SaveChangesAsync();
await _uploadService.addFile(fileName, fileExtension, "Page");
}
else
{
_dbContext.Pages.Add(new Pages
{
ColumnID = int.Parse(pv.Column),
Language = (int)pv.Language,
Title = pv.Title,
PContent = pv.PContent,
});
await _dbContext.SaveChangesAsync();
}
}