public static string GetValueAndRelease(ReseekableStringBuilder sb)
{
var s = sb.ToString();
Release(sb);
return(s);
}
public static string SubstringCached(this ReseekableStringBuilder str, int startIndex, int length)
{
var reader = reseekablestringBuilderReader ?? (reseekablestringBuilderReader = new ReseekableStringBuilderReader());
reader.StringBuilder = str;
string result = reader.SubstringCached(startIndex, length);
reader.StringBuilder = null;
return(result);
}
public static void Release(ReseekableStringBuilder sb)
{
var u = _unusedReseekableStringBuilders;
if (u != null && u.Count < 4 && ValueString.ShouldKeepReleasedStringBuilder(sb._sb))
{
sb._start = 0;
sb._sb.Length = 0;
u.Add(sb);
}
}
internal static string GetFileSystemName(LazyUri url, string cacheFolder, string extension, bool createLng, bool partition = true)
{
var hashed = false;
var isazure = cacheFolder != null && cacheFolder.StartsWith("azure:");
if (cacheFolder == null)
{
return(null);
}
if (!isazure && cacheFolder.Length > CacheFolderMaxLength)
{
throw new ArgumentException("The path of the file cache folder must not be longer than " + CacheFolderMaxLength + " characters.");
}
var str = url.AbsoluteUri;
var hashcode = Math.Abs((long)str.GetHashCode());
var sb = ReseekableStringBuilder.AcquirePooledStringBuilder();
if (url.Scheme != "http" && url.Scheme != "https")
{
throw new NotSupportedException("URI scheme is not supported.");
}
var https = url.Scheme == "https";
sb.Append((string)url.DnsSafeHost);
if (!url.IsDefaultPort)
{
sb.Append("∴");
sb.AppendFast((int)url.Port);
}
sb.Append(https ? "₰" : "ℓ");
var abspath = url.AbsolutePath;
sb.Append(abspath, 1, abspath.Length - 1);
sb.Append((string)url.Query);
sb.Append((string)url.Fragment);
if (sb.Length <= CacheFileNameMaxLength)
{
FixupFabulousUrl(sb);
foreach (var item in Path.GetInvalidFileNameChars())
{
if (sb.IndexOf(item) != -1)
{
sb.Replace(item.ToString(), "℅" + ((int)item).ToString("X2"));
}
}
sb.Append(extension);
}
var folder = isazure ? null : partition?Path.Combine(cacheFolder, (hashcode % 1000).ToString("000")) : cacheFolder;
if (sb.Length > CacheFileNameMaxLength)
{
#if NET35
sb.Length = 0;
#else
sb.Clear();
#endif
sb.Append(url.DnsSafeHost.TrimSize(60, 0, false));
if (!url.IsDefaultPort)
{
sb.Append("∴");
sb.AppendFast((int)url.Port);
}
sb.Append(https ? "₰" : "ℓ");
sb.Append("↔");
using (var hashAlgorithm =
#if NATIVE_HTTP
System.Security.Cryptography.SHA256.Create()
#else
System.Security.Cryptography.Reimpl.SHA256.Create()
#endif
)
{
byte[] inputBytes = System.Text.Encoding.UTF8.GetBytes(str);
byte[] hash = hashAlgorithm.ComputeHash(inputBytes);
for (int i = 0; i < hash.Length; i++)
{
sb.Append(hash[i].ToString("x2"));
}
}
// IPv6 addresses
FixupFabulousUrl(sb);
if (!isazure)
{
sb.Append(extension);
}
hashed = true;
}
if (isazure)
{
sb.Length -= 4; // remove .dat
sb.Replace("₰", "/s/");
sb.Replace("ℓ", "/h/");
sb.Replace("↑", "");
sb.Replace('\u222F', '/'); // ∯
return(ReseekableStringBuilder.GetValueAndRelease(sb));
}
var path = Path.Combine(folder, ReseekableStringBuilder.GetValueAndRelease(sb));
if (createLng)
{
Directory.CreateDirectory(folder);
if (hashed)
{
var p = Path.ChangeExtension(path, ".lng");
if (!BlobStore.Exists(p))
{
BlobStore.WriteAllText(p, (string)url.AbsoluteUri, Encoding.UTF8);
}
}
}
return(path);
}
public static string ToStringCached(this ReseekableStringBuilder str)
{
return(str.SubstringCached(0, str.Length));
}
public static string SubstringCached(this ReseekableStringBuilder str, int startIndex)
{
return(str.SubstringCached(startIndex, str.Length - startIndex));
}