void CacheImage(AttachmentInfo ai)
{
if (ai != null && MimeHelpers.IsImage(ai.Mime))
{
Response.Cache.SetCacheability(HttpCacheability.Private);
Response.Cache.SetMaxAge(TimeSpan.FromDays(30));
}
}
public string SaveFileIfExist(string name)
{
if (string.IsNullOrWhiteSpace(name))
{
return(string.Empty);
}
IFormFile file = this._httpContextAccessor.HttpContext.Request.Form.Files.GetFile(name);
if (file == null)
{
return(string.Empty);
}
string extension = MimeHelpers.GetExtension(file.ContentType);
if (string.IsNullOrWhiteSpace(extension))
{
extension = Path.GetExtension(file.FileName);
}
Console.WriteLine(file.ContentType);
string relativePath = string.Format("\\Upload\\{0}\\{1}{2}{3}",
DateTime.Now.ToString("yyyyMM"),
DateTime.Now.ToString("yyyyMMddHHmmssfff"),
RandomHelpers.RandomInt(1000, 9999),
extension
).ToLower();
string absolutePath = this._hostingEnvironment.WebRootPath + relativePath;
PathHelpers.EnsureParentDirectory(absolutePath);
Stream stream = file.OpenReadStream();
//对大于1MB的图片进行压缩，最大宽度为1024像素
//if (MimeUtils.IsImage(file.ContentType) && file.Length > 1024 * 1000)
//{
// ThumbUtils.SendSmallImage(stream, absolutePath, 1024, 1024);
//}
//else
{
byte[] buffer = new byte[file.Length];
stream.Read(buffer, 0, buffer.Length);
System.IO.File.WriteAllBytes(absolutePath, buffer);
}
stream.Close();
string host = GetHostUrl(this._httpContextAccessor.HttpContext);
return(host + relativePath.Replace("\\", "/"));
}
public BinaryContent(string filePath)
{
OriginalFileName = Path.GetFileName(filePath);
ContentType = MimeHelpers.GetMimeMapping(OriginalFileName);
_data = File.OpenRead(filePath);
}
