public void OnActionExecuting(ActionExecutingContext context)
{
if (!context.ActionArguments.Any())
{
return;
}
var bundleFile = context.ActionArguments.First().Value as BundleRequestModel;
ICacheBuster cacheBuster;
RequestModel file = null;
if (bundleFile != null)
{
cacheBuster = _cacheBusterResolver.GetCacheBuster(bundleFile.Bundle.GetBundleOptions(_bundleManager, bundleFile.Debug).GetCacheBusterType());
}
else
{
//the default for any dynamically (non bundle) file is the default bundle options in production
cacheBuster = _cacheBusterResolver.GetCacheBuster(_bundleManager.GetDefaultBundleOptions(false).GetCacheBusterType());
file = context.ActionArguments.First().Value as RequestModel;
}
if (file != null)
{
FileResult result;
DateTime lastWrite;
if (TryGetCachedCompositeFileResult(_fileSystemHelper, cacheBuster, file.FileKey, file.Compression, file.Mime, out result, out lastWrite))
{
file.LastFileWriteTime = lastWrite;
context.Result = result;
}
}
}
public CompositeFileModel(IHasher hasher, IUrlManager urlManager, IActionContextAccessor accessor, IRequestHelper requestHelper, IBundleManager bundleManager, CacheBusterResolver cacheBusterResolver)
: base("file", urlManager, accessor, requestHelper)
{
//Creates a single hash of the full url (which can include many files)
FileKey = hasher.Hash(string.Join(".", ParsedPath.Names));
CacheBuster = cacheBusterResolver.GetCacheBuster(bundleManager.GetDefaultBundleOptions(false).GetCacheBusterType());
}
private async Task ProcessFileImpl(IWebFile file, BundleOptions bundleOptions, BundleContext bundleContext)
{
if (file == null)
{
throw new ArgumentNullException(nameof(file));
}
var extension = Path.GetExtension(file.FilePath);
var fileWatchEnabled = bundleOptions?.FileWatchOptions.Enabled ?? false;
Lazy <IFileInfo> fileInfo;
var cacheBuster = bundleOptions != null
? _cacheBusterResolver.GetCacheBuster(bundleOptions.GetCacheBusterType())
: _cacheBusterResolver.GetCacheBuster(_bundleManager.GetDefaultBundleOptions(false).GetCacheBusterType()); //the default for any dynamically (non bundle) file is the default bundle options in production
var cacheFile = _fileSystemHelper.GetCacheFilePath(file, fileWatchEnabled, extension, cacheBuster, out fileInfo);
var exists = File.Exists(cacheFile);
//check if it's in cache
if (exists)
{
_logger.LogDebug($"File already in cache '{file.FilePath}', type: {file.DependencyType}, cacheFile: {cacheFile}, watching? {fileWatchEnabled}");
}
else
{
if (file.Pipeline.Processors.Count > 0)
{
_logger.LogDebug($"Processing file '{file.FilePath}', type: {file.DependencyType}, cacheFile: {cacheFile}, watching? {fileWatchEnabled} ...");
var contents = await _fileSystemHelper.ReadContentsAsync(fileInfo.Value);
var watch = new Stopwatch();
watch.Start();
//process the file
var processed = await file.Pipeline.ProcessAsync(new FileProcessContext(contents, file, bundleContext));
watch.Stop();
_logger.LogDebug($"Processed file '{file.FilePath}' in {watch.ElapsedMilliseconds}ms");
//save it to the cache path
await _fileSystemHelper.WriteContentsAsync(cacheFile, processed);
}
else
{
// we can just copy the the file as-is to the cache file
_fileSystemHelper.CopyFile(fileInfo.Value.PhysicalPath, cacheFile);
}
}
//If file watching is enabled, then watch it - this is regardless of whether the cache file exists or not
// since after app restart if there's already a cache file, we still want to watch the file set
if (fileWatchEnabled)
{
// watch this file for changes, if the file is already watched this will do nothing
_fileSystemHelper.Watch(file, fileInfo.Value, bundleOptions, FileModified);
}
}
private async Task ProcessFileImpl(IWebFile file, BundleOptions bundleOptions, BundleContext bundleContext)
{
if (file == null)
{
throw new ArgumentNullException(nameof(file));
}
var extension = Path.GetExtension(file.FilePath);
var fileWatchEnabled = bundleOptions?.FileWatchOptions.Enabled ?? false;
Lazy <IFileInfo> fileInfo;
var cacheBuster = bundleOptions != null
? _cacheBusterResolver.GetCacheBuster(bundleOptions.GetCacheBusterType())
: _cacheBusterResolver.GetCacheBuster(_bundleManager.GetDefaultBundleOptions(false).GetCacheBusterType()); //the default for any dynamically (non bundle) file is the default bundle options in production
var cacheFile = _fileSystemHelper.GetCacheFilePath(file, fileWatchEnabled, extension, cacheBuster, out fileInfo);
//check if it's in cache
if (!File.Exists(cacheFile))
{
var contents = await _fileSystemHelper.ReadContentsAsync(fileInfo.Value);
//process the file
var processed = await file.Pipeline.ProcessAsync(new FileProcessContext(contents, file, bundleContext));
//save it to the cache path
await _fileSystemHelper.WriteContentsAsync(cacheFile, processed);
}
//If file watching is enabled, then watch it - this is regardless of whether the cache file exists or not
// since after app restart if there's already a cache file, we still want to watch the file set
if (fileWatchEnabled)
{
// watch this file for changes, if the file is already watched this will do nothing
_fileSystemHelper.Watch(file, fileInfo.Value, bundleOptions, FileModified);
}
}
/// <summary>
/// Generates the URLs for a dynamically registered set of files (non pre-defined bundle)
/// </summary>
/// <param name="files"></param>
/// <param name="fileType"></param>
/// <param name="pipeline"></param>
/// <param name="debug"></param>
/// <returns></returns>
private async Task <IEnumerable <string> > GenerateUrlsAsync(
IEnumerable <IWebFile> files,
WebFileType fileType,
PreProcessPipeline pipeline = null,
bool debug = false)
{
var result = new List <string>();
var orderedFiles = _fileSetGenerator.GetOrderedFileSet(files, pipeline ?? _processorFactory.CreateDefault(fileType));
if (debug)
{
return(orderedFiles.Select(x => x.FilePath));
}
var compression = _requestHelper.GetClientCompression(_httpContextAccessor.HttpContext.Request.Headers);
//Get the file collection used to create the composite URLs and the external requests
var fileBatches = _fileBatcher.GetCompositeFileCollectionForUrlGeneration(orderedFiles);
var cacheBuster = _cacheBusterResolver.GetCacheBuster(_bundleManager.GetDefaultBundleOptions(debug).GetCacheBusterType());
foreach (var batch in fileBatches)
{
//if it's external, the rule is that a WebFileBatch can only contain a single external file
// it's path will be normalized as an external url so we just use it
if (batch.IsExternal)
{
result.Add(batch.Single().Original.FilePath);
}
else
{
//Get the URLs for the batch, this could be more than one resulting URL depending on how many
// files are in the batch and the max url length
var compositeUrls = _urlManager.GetUrls(
batch.Select(x => x.Hashed),
fileType == WebFileType.Css ? ".css" : ".js",
cacheBuster);
foreach (var u in compositeUrls)
{
//now we need to determine if these files have already been minified
var compositeFilePath = _fileSystemHelper.GetCurrentCompositeFilePath(cacheBuster, compression, u.Key);
if (!File.Exists(compositeFilePath))
{
using (var bundleContext = BundleContext.CreateEmpty())
{
//need to process/minify these files - need to use their original paths of course
foreach (var file in batch.Select(x => x.Original))
{
await _preProcessManager.ProcessAndCacheFileAsync(file, null, bundleContext);
}
}
}
result.Add(u.Url);
}
}
}
return(result);
}
