public string GetImageProfileUrl(string path, string profileName, ContentItem contentItem, params FilterRecord[] customFilters)
{
// path is the publicUrl of the media, so it might contain url-encoded chars
// try to load the processed filename from cache
var filePath = _fileNameProvider.GetFileName(profileName, System.Web.HttpUtility.UrlDecode(path));
bool process = false;
//after reboot the app cache is empty so we reload the image in the cache if it exists in the _Profiles folder
if (string.IsNullOrEmpty(filePath))
{
var profileFilePath = _storageProvider.Combine("_Profiles", FormatProfilePath(profileName, System.Web.HttpUtility.UrlDecode(path)));
if (_storageProvider.FileExists(profileFilePath))
{
_fileNameProvider.UpdateFileName(profileName, System.Web.HttpUtility.UrlDecode(path), profileFilePath);
filePath = profileFilePath;
}
}
// if the filename is not cached, process it
if (string.IsNullOrEmpty(filePath))
{
Logger.Debug("FilePath is null, processing required, profile {0} for image {1}", profileName, path);
process = true;
}
// the processd file doesn't exist anymore, process it
else if (!_storageProvider.FileExists(filePath))
{
Logger.Debug("Processed file no longer exists, processing required, profile {0} for image {1}", profileName, path);
process = true;
}
// if the original file is more recent, process it
else
{
DateTime pathLastUpdated;
if (TryGetImageLastUpdated(path, out pathLastUpdated))
{
var filePathLastUpdated = _storageProvider.GetFile(filePath).GetLastUpdated();
if (pathLastUpdated > filePathLastUpdated)
{
Logger.Debug("Original file more recent, processing required, profile {0} for image {1}", profileName, path);
process = true;
}
}
}
// todo: regenerate the file if the profile is newer, by deleting the associated filename cache entries.
if (process)
{
Logger.Debug("Processing profile {0} for image {1}", profileName, path);
ImageProfilePart profilePart;
if (customFilters == null || !customFilters.Any(c => c != null))
{
profilePart = _profileService.GetImageProfileByName(profileName);
if (profilePart == null)
{
return(String.Empty);
}
}
else
{
profilePart = _services.ContentManager.New <ImageProfilePart>("ImageProfile");
profilePart.Name = profileName;
foreach (var customFilter in customFilters)
{
profilePart.Filters.Add(customFilter);
}
}
// prevent two requests from processing the same file at the same time
// this is only thread safe at the machine level, so there is a try/catch later
// to handle cross machines concurrency
lock (String.Intern(path)) {
using (var image = GetImage(path)) {
if (image == null)
{
return(null);
}
var filterContext = new FilterContext {
Media = image, FilePath = _storageProvider.Combine("_Profiles", FormatProfilePath(profileName, System.Web.HttpUtility.UrlDecode(path)))
};
var tokens = new Dictionary <string, object>();
// if a content item is provided, use it while tokenizing
if (contentItem != null)
{
tokens.Add("Content", contentItem);
}
foreach (var filter in profilePart.Filters.OrderBy(f => f.Position))
{
var descriptor = _processingManager.DescribeFilters().SelectMany(x => x.Descriptors).FirstOrDefault(x => x.Category == filter.Category && x.Type == filter.Type);
if (descriptor == null)
{
continue;
}
var tokenized = _tokenizer.Replace(filter.State, tokens);
filterContext.State = FormParametersHelper.ToDynamic(tokenized);
descriptor.Filter(filterContext);
}
_fileNameProvider.UpdateFileName(profileName, System.Web.HttpUtility.UrlDecode(path), filterContext.FilePath);
if (!filterContext.Saved)
{
try {
var newFile = _storageProvider.OpenOrCreate(filterContext.FilePath);
using (var imageStream = newFile.OpenWrite()) {
using (var sw = new BinaryWriter(imageStream)) {
if (filterContext.Media.CanSeek)
{
filterContext.Media.Seek(0, SeekOrigin.Begin);
}
using (var sr = new BinaryReader(filterContext.Media)) {
int count;
var buffer = new byte[8192];
while ((count = sr.Read(buffer, 0, buffer.Length)) != 0)
{
sw.Write(buffer, 0, count);
}
}
}
}
}
catch (Exception e) {
Logger.Error(e, "A profile could not be processed: " + path);
}
}
filterContext.Media.Dispose();
filePath = filterContext.FilePath;
}
}
}
// generate a timestamped url to force client caches to update if the file has changed
var publicUrl = _storageProvider.GetPublicUrl(filePath);
var timestamp = _storageProvider.GetFile(filePath).GetLastUpdated().Ticks;
return(publicUrl + "?v=" + timestamp.ToString(CultureInfo.InvariantCulture));
}
public string GetImageProfileUrl(string path, string profileName, FilterRecord customFilter, ContentItem contentItem)
{
// try to load the processed filename from cache
var filePath = _fileNameProvider.GetFileName(profileName, path);
bool process = false;
// if the filename is not cached, process it
if (string.IsNullOrEmpty(filePath))
{
Logger.Debug("FilePath is null, processing required, profile {0} for image {1}", profileName, path);
process = true;
}
// the processd file doesn't exist anymore, process it
else if (!_storageProvider.FileExists(filePath))
{
Logger.Debug("Processed file no longer exists, processing required, profile {0} for image {1}", profileName, path);
process = true;
}
// if the original file is more recent, process it
else
{
DateTime pathLastUpdated;
if (TryGetImageLastUpdated(path, out pathLastUpdated))
{
var filePathLastUpdated = _storageProvider.GetFile(filePath).GetLastUpdated();
if (pathLastUpdated > filePathLastUpdated)
{
Logger.Debug("Original file more recent, processing required, profile {0} for image {1}", profileName, path);
process = true;
}
}
}
// todo: regenerate the file if the profile is newer, by deleting the associated filename cache entries.
if (process)
{
Logger.Debug("Processing profile {0} for image {1}", profileName, path);
ImageProfilePart profilePart;
if (customFilter == null)
{
profilePart = _profileService.GetImageProfileByName(profileName);
if (profilePart == null)
{
return(String.Empty);
}
}
else
{
profilePart = _services.ContentManager.New <ImageProfilePart>("ImageProfile");
profilePart.Name = profileName;
profilePart.Filters.Add(customFilter);
}
using (var image = GetImage(path)) {
var filterContext = new FilterContext {
Media = image, FilePath = _storageProvider.Combine("_Profiles", _storageProvider.Combine(profileName, CreateDefaultFileName(path)))
};
var tokens = new Dictionary <string, object>();
// if a content item is provided, use it while tokenizing
if (contentItem != null)
{
tokens.Add("Content", contentItem);
}
foreach (var filter in profilePart.Filters.OrderBy(f => f.Position))
{
var descriptor = _processingManager.DescribeFilters().SelectMany(x => x.Descriptors).FirstOrDefault(x => x.Category == filter.Category && x.Type == filter.Type);
if (descriptor == null)
{
continue;
}
var tokenized = _tokenizer.Replace(filter.State, tokens);
filterContext.State = FormParametersHelper.ToDynamic(tokenized);
descriptor.Filter(filterContext);
}
_fileNameProvider.UpdateFileName(profileName, path, filterContext.FilePath);
if (!filterContext.Saved)
{
_storageProvider.TryCreateFolder(_storageProvider.Combine("_Profiles", profilePart.Name));
var newFile = _storageProvider.OpenOrCreate(filterContext.FilePath);
using (var imageStream = newFile.OpenWrite()) {
using (var sw = new BinaryWriter(imageStream)) {
if (filterContext.Media.CanSeek)
{
filterContext.Media.Seek(0, SeekOrigin.Begin);
}
using (var sr = new BinaryReader(filterContext.Media)) {
int count;
var buffer = new byte[8192];
while ((count = sr.Read(buffer, 0, buffer.Length)) != 0)
{
sw.Write(buffer, 0, count);
}
}
}
}
}
filterContext.Media.Dispose();
filePath = filterContext.FilePath;
}
}
// generate a timestamped url to force client caches to update if the file has changed
var publicUrl = _storageProvider.GetPublicUrl(filePath);
var timestamp = _storageProvider.GetFile(filePath).GetLastUpdated().Ticks;
return(publicUrl + "?v=" + timestamp.ToString(CultureInfo.InvariantCulture));
}