/// <summary>
/// Applies no transformation, but does try to infer the content type if not set
/// using the first file in the response (for js and css files only)
/// </summary>
/// <param name="context"></param>
/// <param name="response"></param>
public void Process(BundleContext context, BundleResponse response)
{
if (response == null)
{
throw new ArgumentNullException("response");
}
// No transform done, just set the content type if specified
if (!String.IsNullOrEmpty(ContentType))
{
response.ContentType = ContentType;
}
else
{
// Try to infer content type from the bundle files if not specified.
if (String.IsNullOrEmpty(response.ContentType) && response.Files != null)
{
// only set the content type if the first file has a js or css extension
BundleFile firstFile = response.Files.FirstOrDefault();
if (firstFile != null)
{
string extension = VirtualPathUtility.GetExtension(firstFile.VirtualFile.VirtualPath);
if (String.Equals(extension, ".js", StringComparison.OrdinalIgnoreCase))
{
response.ContentType = JsMinify.JsContentType;
}
else if (String.Equals(extension, ".css", StringComparison.OrdinalIgnoreCase))
{
response.ContentType = CssMinify.CssContentType;
}
}
}
}
}
// Look for <fileName>.<replacementExtension>(.<ext>) in the diretory path
private static BundleFile FindReplacementFile(BundleContext context, BundleFile file, string replacementExtension)
{
string directoryPath = Path.GetDirectoryName(file.VirtualFile.VirtualPath);
string extension = Path.GetExtension(file.VirtualFile.Name);
string fileName = Path.GetFileNameWithoutExtension(file.VirtualFile.Name);
string replacementFileName = fileName + "." + replacementExtension;
if (extension.Length > 0)
{
replacementFileName += extension;
}
// NOTE: VirtualPathUtility.Combine does not work as it uses '/' while
// the default VPP requires '\' to find files, this might have result
// in issues with Custom VPP implementations and this feature
string replacementFilePath = Path.Combine(directoryPath, replacementFileName);
string replacementIncludePath = Path.Combine(Path.GetDirectoryName(file.IncludedVirtualPath), replacementFileName);
// Need to fixup the slashes
replacementIncludePath = replacementIncludePath.Replace('\\', '/');
// NOTE: We cache every bundle response, so we shouldn't be hitting FileExists too often
if (context.VirtualPathProvider.FileExists(replacementFilePath))
{
return(new BundleFile(replacementIncludePath,
context.VirtualPathProvider.GetFile(replacementFilePath)));
}
return(null);
}