/// <summary>
/// Uploads image.
/// </summary>
/// <param name="source"></param>
/// <param name="userId"></param>
/// <param name="fileName"></param>
/// <param name="contentType">e.g. "image/jpeg"</param>
/// <param name="uploadFrom"></param>
/// <returns></returns>
public async Task <Media> UploadAsync(Stream source, int userId, string fileName, string contentType,
EUploadedFrom uploadFrom)
{
// check if file type is supported
var ext = Path.GetExtension(fileName).ToLower();
var ctype = "." + contentType.Substring(contentType.LastIndexOf("/") + 1).ToLower();
if (ext.IsNullOrEmpty() || !Accepted_Image_Types.Contains(ext) || !Accepted_Image_Types.Contains(ctype))
{
throw new NotSupportedException(ERR_MSG_FILETYPE);
}
// check file size
if (source.Length > MAX_FILE_SIZE)
{
throw new FanException(ERR_MSG_FILESIZE);
}
// uploadedOn
var uploadedOn = DateTimeOffset.UtcNow;
// get the slugged filename and title from original filename
var(fileNameSlugged, title) = ProcessFileName(fileName, uploadFrom);
// get unique filename
var uniqueFileName = await GetUniqueFileNameAsync(fileNameSlugged, uploadedOn);
// get image resizes
var resizes = contentType.Equals("image/gif") ?
GetImageResizeListForGif(uploadedOn) : GetImageResizeList(uploadedOn);
return(await _mediaSvc.UploadImageAsync(source, resizes, uniqueFileName, contentType, title,
uploadedOn, EAppType.Blog, userId, uploadFrom));
}
/// <summary>
/// Uploads image by resizing and storing it.
/// </summary>
/// <param name="source"></param>
/// <param name="resizes"></param>
/// <param name="fileName"></param>
/// <param name="contentType"></param>
/// <param name="uploadedOn"></param>
/// <param name="appType"></param>
/// <param name="userId"></param>
/// <param name="uploadFrom"></param>
/// <returns></returns>
public async Task <Media> UploadImageAsync(Stream source,
List <ImageResizeInfo> resizes,
string fileName,
string contentType,
string title,
DateTimeOffset uploadedOn,
EAppType appType,
int userId,
EUploadedFrom uploadFrom = EUploadedFrom.Browser)
{
int resizeCount = 0;
var(widthOrig, heightOrig) = GetOriginalSize(source);
foreach (var resize in resizes)
{
using (var dest = new MemoryStream())
{
// each time source is read, it needs reset
source.Position = 0;
// don't resize original png and gif may output large file size, save it as is
if (resize.TargetSize == int.MaxValue)
{
await _storageProvider.SaveFileAsync(source, fileName, resize.Path, resize.PathSeparator);
}
else if (Math.Max(widthOrig, heightOrig) > resize.TargetSize) // only resize and save when it's larger than target
{
resizeCount++;
Resize(source, dest, resize.TargetSize);
dest.Position = 0;
await _storageProvider.SaveFileAsync(dest, fileName, resize.Path, resize.PathSeparator);
}
}
}
// create record in db
var media = new Media
{
UserId = userId,
AppType = appType,
FileName = fileName,
Title = title,
Description = null,
Length = source.Length,
MediaType = EMediaType.Image,
UploadedOn = uploadedOn,
UploadedFrom = uploadFrom,
Width = widthOrig,
Height = heightOrig,
Caption = title,
ContentType = contentType,
Alt = title,
ResizeCount = resizeCount,
};
await _mediaRepo.CreateAsync(media);
return(media);
}
/// <summary>
/// Uploads image by resizing and storing it.
/// </summary>
/// <param name="source"></param>
/// <param name="resizes"></param>
/// <param name="fileName"></param>
/// <param name="contentType"></param>
/// <param name="uploadedOn"></param>
/// <param name="appType"></param>
/// <param name="userId"></param>
/// <param name="uploadFrom"></param>
/// <returns></returns>
public async Task <Media> UploadImageAsync(Stream source,
List <ImageResizeInfo> resizes,
string fileName,
string contentType,
string title,
DateTimeOffset uploadedOn,
EAppType appType,
int userId,
EUploadedFrom uploadFrom = EUploadedFrom.Browser)
{
int widthOrig;
int heightOrig;
int resizeCount = 0;
if (contentType.Equals("image/gif"))
{
using (var imageColl = new MagickImageCollection(source))
{
widthOrig = imageColl[0].Width;
heightOrig = imageColl[0].Height;
// currently for gif I only save original so there is no resizing
// TODO: with ImageMagick resizing a gif take a long time
// plus the resized gif has a larger file size than original
// I tried limit gif length to 800px, but even resizing to small has these issues
// resize and store
foreach (var resize in resizes)
{
// save original without resizing
if (resize.TargetSize == int.MaxValue)
{
source.Position = 0;
await _storageProvider.SaveFileAsync(source, fileName, resize.Path, resize.PathSeparator);
}
//else if (Math.Max(widthOrig, heightOrig) > resize.TargetSize)
//{
// resizeCount++;
// var (width, height) = GetNewSize(widthOrig, heightOrig, resize.TargetSize);
// imageColl.Coalesce();
// foreach (var image in imageColl)
// {
// var colors = image.TotalColors;
// image.Resize(width, height); // resize will make # of colors higher
// image.Quantize(new QuantizeSettings
// {
// Colors = colors, // set it back to the smaller original colors
// DitherMethod = DitherMethod.No
// });
// }
// imageColl.Optimize();
// await _storageProvider.SaveFileAsync(imageColl.ToByteArray(), fileName, resize.Path, resize.PathSeparator);
//}
}
}
}
else if (contentType.Equals("image/png"))
{
using (var image = new MagickImage(source))
{
widthOrig = image.Width;
heightOrig = image.Height;
foreach (var resize in resizes)
{
// save original without resizing for png
if (resize.TargetSize == int.MaxValue)
{
source.Position = 0;
await _storageProvider.SaveFileAsync(source, fileName, resize.Path, resize.PathSeparator);
}
else if (Math.Max(widthOrig, heightOrig) > resize.TargetSize)
{
resizeCount++;
var(width, height) = GetNewSize(widthOrig, heightOrig, resize.TargetSize);
//image.Quality = 75; // does not seem to affect output file size, so commented out
image.Resize(width, height);
await _storageProvider.SaveFileAsync(image.ToByteArray(), fileName, resize.Path, resize.PathSeparator);
}
}
}
}
else // jpg
{
using (var image = new MagickImage(source))
{
widthOrig = image.Width;
heightOrig = image.Height;
foreach (var resize in resizes)
{
if (resize.TargetSize == int.MaxValue || Math.Max(widthOrig, heightOrig) > resize.TargetSize)
{
if (resize.TargetSize != int.MaxValue)
{
resizeCount++;
}
var(width, height) = GetNewSize(widthOrig, heightOrig, resize.TargetSize);
// setting the Quality is needed for having it here makes a difference for a smaller output file size!
image.Quality = 85; // 75 is default
image.Resize(width, height);
await _storageProvider.SaveFileAsync(image.ToByteArray(), fileName, resize.Path, resize.PathSeparator);
}
}
}
}
// create record in db
var media = new Media
{
UserId = userId,
AppType = appType,
FileName = fileName,
Title = title,
Description = null,
Length = source.Length,
MediaType = EMediaType.Image,
UploadedOn = uploadedOn,
UploadedFrom = uploadFrom,
Width = widthOrig,
Height = heightOrig,
Caption = title,
ContentType = contentType,
Alt = title,
ResizeCount = resizeCount,
};
await _mediaRepo.CreateAsync(media);
return(media);
}
/// <summary>
/// Takes the original filename and returns a slugged filename and title attribute.
/// </summary>
/// <remarks>
/// If the filename is too long it shorten it. Then it generates a slugged filename which
/// is hyphen separeated value for english original filenames, a random string value for
/// non-english filenames. The title attribute is original filename html-encoded for safe
/// display.
/// </remarks>
/// <param name="fileNameOrig">Original filename user is uploading.</param>
/// <param name="uploadFrom">This is used solely because of olw quirks I have to handle.</param>
/// <returns></returns>
private (string fileNameSlugged, string title) ProcessFileName(string fileNameOrig, EUploadedFrom uploadFrom)
{
// extra filename without ext, note this will also remove the extra path info from OLW
var fileNameWithoutExt = Path.GetFileNameWithoutExtension(fileNameOrig);
// make sure file name is not too long
if (fileNameWithoutExt.Length > MediaService.MEDIA_FILENAME_MAXLEN)
{
fileNameWithoutExt = fileNameWithoutExt.Substring(0, MediaService.MEDIA_FILENAME_MAXLEN);
}
// there is a quirk file uploaded from olw had "_2" suffixed to the name
if (uploadFrom == EUploadedFrom.MetaWeblog && fileNameWithoutExt.EndsWith("_2"))
{
fileNameWithoutExt = fileNameWithoutExt.Remove(fileNameWithoutExt.Length - 2);
}
// slug file name
var slug = Util.Slugify(fileNameWithoutExt);
if (slug.IsNullOrEmpty()) // slug may end up empty
{
slug = Util.RandomString(6);
}
else if (uploadFrom == EUploadedFrom.MetaWeblog && slug == "thumb") // or may end up with only "thumb" for olw
{
slug = string.Concat(Util.RandomString(6), "_thumb");
}
var ext = Path.GetExtension(fileNameOrig).ToLower();
var fileNameSlugged = $"{slug}{ext}";
var fileNameEncoded = WebUtility.HtmlEncode(fileNameWithoutExt);
return(fileNameSlugged : fileNameSlugged, title : fileNameEncoded);
}
/// <summary>
/// Returns media url after upload to storage.
/// </summary>
/// <param name="userId">Id of the user uploading the media.</param>
/// <param name="fileName">File name with ext.</param>
/// <param name="content">File content</param>
/// <param name="appId">Which app it uploaded it.</param>
/// <returns></returns>
/// <remarks>
/// Note: This method is optimized for metaweblog use with olw, other apps have totally
/// different file logic.
///
/// Depending on the storage provider, the returned media url could be relative path
/// (File Sys) or absolute path (Azure Blog).
/// </remarks>
public async Task <string> UploadMediaAsync(int userId, string fileName, byte[] content, EAppType appId, EUploadedFrom uploadFrom)
{
// verify ext is supported
var ext = Path.GetExtension(fileName);
if (ext.IsNullOrEmpty() || !Accepted_Image_Types.Contains(ext, StringComparer.InvariantCultureIgnoreCase))
{
throw new FanException("Upload file type is not supported.");
}
// time
var uploadedOn = DateTimeOffset.UtcNow;
var year = uploadedOn.Year.ToString();
var month = uploadedOn.Month.ToString("d2");
// make sure file name is not too long
var fileNameWithoutExt = Path.GetFileNameWithoutExtension(fileName);
if (fileNameWithoutExt.Length > MEDIA_FILENAME_MAXLEN)
{
fileNameWithoutExt = fileNameWithoutExt.Substring(0, MEDIA_FILENAME_MAXLEN);
}
// there is a quirk file uploaded from olw had "_2" suffixed to the name
if (uploadFrom == EUploadedFrom.MetaWeblog && fileNameWithoutExt.EndsWith("_2"))
{
fileNameWithoutExt = fileNameWithoutExt.Remove(fileNameWithoutExt.Length - 2);
}
// slug file name
// chinese fn ends up emtpy and the thumb file with chinese fn ends up with only "thumb"
var slug = Util.FormatSlug(fileNameWithoutExt);
if (slug.IsNullOrEmpty())
{
slug = Util.RandomString(6);
}
else if (uploadFrom == EUploadedFrom.MetaWeblog && slug == "thumb")
{
slug = string.Concat(Util.RandomString(6), "_thumb");
}
string fileNameSlugged = $"{slug}{ext}";
// save file to storage and get back file path
var filePath = await _storageProvider.SaveFileAsync(userId, fileNameSlugged, year, month, content, EAppType.Blog);
// encode filename
var fileNameEncoded = WebUtility.HtmlEncode(fileNameWithoutExt);
// since file name could have been updated for uniqueness
var start = filePath.LastIndexOf('/') + 1;
var uniqueFileName = filePath.Substring(start, filePath.Length - start);
// save record to db
var media = new Media
{
UserId = userId,
AppId = appId,
FileName = uniqueFileName, // unique filename from storage provider
Title = fileNameEncoded, // original filename
Description = null,
Length = content.LongLength,
MediaType = EMediaType.Image,
UploadedOn = uploadedOn,
UploadedFrom = uploadFrom,
};
await _mediaRepo.CreateAsync(media);
return(filePath);
}
/// <summary>
/// Uploads image by resizing and storing it.
/// </summary>
/// <param name="source"></param>
/// <param name="resizes"></param>
/// <param name="fileName"></param>
/// <param name="contentType"></param>
/// <param name="uploadedOn"></param>
/// <param name="appType"></param>
/// <param name="userId"></param>
/// <param name="uploadFrom"></param>
/// <returns></returns>
public async Task <Media> UploadImageAsync(Stream source,
List <ImageResizeInfo> resizes,
string fileName,
string contentType,
string title,
DateTimeOffset uploadedOn,
EAppType appType,
int userId,
EUploadedFrom uploadFrom = EUploadedFrom.Browser)
{
int widthOrig;
int heightOrig;
int resizeCount = 0;
if (contentType.Equals("image/gif"))
{
using (var imageColl = new MagickImageCollection(source))
{
widthOrig = imageColl[0].Width;
heightOrig = imageColl[0].Height;
// resize and store
foreach (var resize in resizes)
{
// save original without resizing, currently I couldn't dec original file size by resizing with ImageMagick
if (resize.TargetSize == int.MaxValue)
{
source.Position = 0;
await _storageProvider.SaveFileAsync(source, fileName, resize.Path, resize.PathSeparator);
}
else if (Math.Max(widthOrig, heightOrig) > resize.TargetSize)
{
resizeCount++;
var(width, height) = GetNewSize(widthOrig, heightOrig, resize.TargetSize);
imageColl.Coalesce();
foreach (var image in imageColl)
{
var colors = image.TotalColors;
image.Resize(width, height); // resize will make # of colors higher
image.Quantize(new QuantizeSettings
{
Colors = colors, // set it back to the smaller original colors
DitherMethod = DitherMethod.No
});
}
imageColl.Optimize();
await _storageProvider.SaveFileAsync(imageColl.ToByteArray(), fileName, resize.Path, resize.PathSeparator);
}
}
}
}
else if (contentType.Equals("image/png"))
{
using (var image = new MagickImage(source))
{
widthOrig = image.Width;
heightOrig = image.Height;
foreach (var resize in resizes)
{
// save original without resizing for png
if (resize.TargetSize == int.MaxValue)
{
source.Position = 0;
await _storageProvider.SaveFileAsync(source, fileName, resize.Path, resize.PathSeparator);
}
else if (Math.Max(widthOrig, heightOrig) > resize.TargetSize)
{
resizeCount++;
var(width, height) = GetNewSize(widthOrig, heightOrig, resize.TargetSize);
//image.Quality = 75; // does not seem to affect output file size, so commented out
image.Resize(width, height);
await _storageProvider.SaveFileAsync(image.ToByteArray(), fileName, resize.Path, resize.PathSeparator);
}
}
}
}
else // jpg
{
using (var image = new MagickImage(source))
{
widthOrig = image.Width;
heightOrig = image.Height;
foreach (var resize in resizes)
{
if (resize.TargetSize == int.MaxValue || Math.Max(widthOrig, heightOrig) > resize.TargetSize)
{
if (resize.TargetSize != int.MaxValue)
{
resizeCount++;
}
var(width, height) = GetNewSize(widthOrig, heightOrig, resize.TargetSize);
image.Quality = 75; // though 75 is default, having it here does make a difference on making output file size smaller!
image.Resize(width, height);
await _storageProvider.SaveFileAsync(image.ToByteArray(), fileName, resize.Path, resize.PathSeparator);
}
}
}
}
// create record in db
var media = new Media
{
UserId = userId,
AppType = appType,
FileName = fileName,
Title = title,
Description = null,
Length = source.Length,
MediaType = EMediaType.Image,
UploadedOn = uploadedOn,
UploadedFrom = uploadFrom,
Width = widthOrig,
Height = heightOrig,
Caption = title,
ContentType = contentType,
Alt = title,
ResizeCount = resizeCount,
};
await _mediaRepo.CreateAsync(media);
return(media);
}
