/// <summary>
/// Sets the necessary headers to disable caching of a response on the client side.
/// </summary>
/// <param name="this">The <see cref="IHttpResponse"/> interface on which this method is called.</param>
/// <exception cref="NullReferenceException"><paramref name="this"/> is <see langword="null"/>.</exception>
public static void DisableCaching(this IHttpResponse @this)
{
var headers = @this.Headers;
headers.Set(HttpHeaderNames.Expires, "Sat, 26 Jul 1997 05:00:00 GMT");
headers.Set(HttpHeaderNames.LastModified, HttpDate.Format(DateTime.UtcNow));
headers.Set(HttpHeaderNames.CacheControl, "no-store, no-cache, must-revalidate");
headers.Add(HttpHeaderNames.Pragma, "no-cache");
}
public async Task ListDirectoryAsync(
MappedResourceInfo info,
string absolutePath,
IEnumerable <MappedResourceInfo> entries,
Stream stream,
CancellationToken cancellationToken)
{
const int MaxEntryLength = 50;
const int SizeIndent = -20; // Negative for right alignment
if (!info.IsDirectory)
{
throw SelfCheck.Failure($"{nameof(HtmlDirectoryLister)}.{nameof(ListDirectoryAsync)} invoked with a file, not a directory.");
}
var encodedPath = WebUtility.HtmlEncode(absolutePath);
using var text = new StreamWriter(stream, Encoding.UTF8);
text.Write("<html><head><title>Index of ");
text.Write(encodedPath);
text.Write("</title></head><body><h1>Index of ");
text.Write(encodedPath);
text.Write("</h1><hr/><pre>");
if (encodedPath.Length > 1)
{
text.Write("<a href='../'>../</a>\n");
}
entries = entries.ToArray();
foreach (var directory in entries.Where(m => m.IsDirectory).OrderBy(e => e.Name))
{
text.Write($"<a href=\"{Uri.EscapeDataString(directory.Name)}{Path.DirectorySeparatorChar}\">{WebUtility.HtmlEncode(directory.Name)}</a>");
text.Write(new string(' ', Math.Max(1, MaxEntryLength - directory.Name.Length + 1)));
text.Write(HttpDate.Format(directory.LastModifiedUtc));
text.Write('\n');
await Task.Yield();
}
foreach (var file in entries.Where(m => m.IsFile).OrderBy(e => e.Name))
{
text.Write($"<a href=\"{Uri.EscapeDataString(file.Name)}{Path.DirectorySeparatorChar}\">{WebUtility.HtmlEncode(file.Name)}</a>");
text.Write(new string(' ', Math.Max(1, MaxEntryLength - file.Name.Length + 1)));
text.Write(HttpDate.Format(file.LastModifiedUtc));
text.Write($" {file.Length.ToString("#,###", CultureInfo.InvariantCulture),SizeIndent}\n");
await Task.Yield();
}
text.Write("</pre><hr/></body></html>");
}
public async Task ListDirectoryAsync(
MappedResourceInfo info,
string absoluteUrlPath,
IEnumerable <MappedResourceInfo> entries,
Stream stream,
CancellationToken cancellationToken)
{
if (info?.IsDirectory != true)
{
throw new ArgumentException("HtmlDirectoryLister.ListDirectoryAsync invoked with a file, not a directory.");
}
string str = WebUtility.HtmlEncode(absoluteUrlPath);
await using StreamWriter text = new StreamWriter(stream, Encoding.UTF8);
text.Write("<html><head><title>Index of ");
text.Write(str);
text.Write("</title></head><body><h1>Index of ");
text.Write(str);
text.Write("</h1><hr/><pre>");
if (str?.Length > 1)
{
text.Write("<a href='../'>../</a>\n");
}
entries = entries.ToArray();
foreach (MappedResourceInfo mappedResourceInfo in entries.Where(m => m.IsDirectory).OrderBy(e => e.Name))
{
text.Write(
$"<a href=\"{(!string.IsNullOrEmpty(str)? str + (str.EndsWith(Path.DirectorySeparatorChar) ? "" : Path.DirectorySeparatorChar.ToString(CultureInfo.InvariantCulture)) : "")}{Uri.EscapeDataString(mappedResourceInfo.Name)}{Path.DirectorySeparatorChar}\">{WebUtility.HtmlEncode(mappedResourceInfo.Name)}</a>");
text.Write(new string(' ', Math.Max(1, 50 - mappedResourceInfo.Name.Length + 1)));
text.Write(HttpDate.Format(mappedResourceInfo.LastModifiedUtc));
text.Write('\n');
await Task.Yield();
}
foreach (MappedResourceInfo mappedResourceInfo in entries.Where(m => m.IsFile).OrderBy(e => e.Name))
{
text.Write(
$"<a href=\"{(!string.IsNullOrEmpty(str) ? str + (str.EndsWith(Path.DirectorySeparatorChar) ? "" : Path.DirectorySeparatorChar.ToString(CultureInfo.InvariantCulture)) : "")}{Uri.EscapeDataString(mappedResourceInfo.Name)}\">{WebUtility.HtmlEncode(mappedResourceInfo.Name)}</a>");
text.Write(new string(' ', Math.Max(1, 50 - mappedResourceInfo.Name.Length + 1)));
text.Write(HttpDate.Format(mappedResourceInfo.LastModifiedUtc));
text.Write(" {0,-20}\n", mappedResourceInfo.Length.ToString("#,###", CultureInfo.InvariantCulture));
await Task.Yield();
}
text.Write("</pre><hr/></body></html>");
}