public override PhpStream Open(ref string path, string mode, StreamOpenOptions options, StreamContext context)
{
int level = -1;
DeflateFilterMode deflateMode = DeflateFilterMode.Normal;
#region Parse mode options
// PHP just looks whether there are mode flags in the mode string (skip the first character)
// last flag is the valid one
for (int i = 1; i < mode.Length; i++)
{
if (Char.IsDigit(mode[i]))
{
level = mode[i] - '0';
}
else if (mode[i] == 'f')
{
deflateMode = DeflateFilterMode.Filter;
}
else if (mode[i] == 'h')
{
deflateMode = DeflateFilterMode.Huffman;
}
}
#endregion
#region Path correction
if (path.StartsWith("compress.zlib://"))
{
path = path.Substring(16);
}
else if (path.StartsWith("zlib:"))
{
path = path.Substring(5);
}
#endregion
PhpStream stream = PhpStream.Open(path, mode, options);
if (stream != null && stream.CanRead)
{
stream.AddFilter(new GzipUncompressionFilter(), FilterChainOptions.Read);
}
if (stream != null && stream.CanWrite)
{
stream.AddFilter(new GzipCompresionFilter(level, deflateMode), FilterChainOptions.Write);
}
return(stream);
}
/// <summary>
/// Insert the filter into the filter chains.
/// </summary>
/// <param name="ctx">Runtime context.</param>
/// <param name="stream">Which stream's filter chains.</param>
/// <param name="filter">What filter.</param>
/// <param name="where">What position in the chains.</param>
/// <param name="parameters">Additional parameters for the filter.</param>
/// <returns>Filters that have been added.</returns>
internal static (PhpFilter readFilter, PhpFilter writeFilter) AddToStream(Context ctx, PhpStream stream, string filter, FilterChainOptions where, PhpValue parameters)
{
if ((stream.Options & StreamAccessOptions.Read) == 0)
{
where &= ~FilterChainOptions.Read;
}
if ((stream.Options & StreamAccessOptions.Write) == 0)
{
where &= ~FilterChainOptions.Write;
}
PhpFilter readFilter = null, writeFilter = null;
if ((where & FilterChainOptions.Read) != 0)
{
if (GetFilter(ctx, filter, true, out readFilter, parameters))
{
stream.AddFilter(readFilter, where);
readFilter.OnCreate();
// Add to chain, (filters buffers too).
}
else
{
PhpException.Throw(PhpError.Warning, Core.Resources.ErrResources.invalid_filter_name, filter);
//return false;
throw new ArgumentException(nameof(filter));
}
}
if ((where & FilterChainOptions.Write) != 0)
{
if (GetFilter(ctx, filter, true, out writeFilter, parameters))
{
stream.AddFilter(writeFilter, where);
writeFilter.OnCreate();
// Add to chain.
}
else
{
PhpException.Throw(PhpError.Warning, Core.Resources.ErrResources.invalid_filter_name, filter);
//return false;
throw new ArgumentException(nameof(filter));
}
}
return(readFilter, writeFilter);
}
/// <summary>
/// Insert the filter into the filter chains.
/// </summary>
/// <param name="ctx">Runtime context.</param>
/// <param name="stream">Which stream's filter chains.</param>
/// <param name="filter">What filter.</param>
/// <param name="where">What position in the chains.</param>
/// <param name="parameters">Additional parameters for the filter.</param>
/// <returns>True if successful.</returns>
public static bool AddToStream(Context ctx, PhpStream stream, string filter, FilterChainOptions where, PhpValue parameters)
{
PhpFilter readFilter, writeFilter;
if ((stream.Options & StreamAccessOptions.Read) == 0)
{
where &= ~FilterChainOptions.Read;
}
if ((stream.Options & StreamAccessOptions.Write) == 0)
{
where &= ~FilterChainOptions.Write;
}
if ((where & FilterChainOptions.Read) > 0)
{
if (!GetFilter(ctx, filter, true, out readFilter, parameters))
{
//PhpException.Throw(PhpError.Warning, CoreResources.GetString("invalid_filter_name", filter));
//return false;
throw new ArgumentException(nameof(filter));
}
stream.AddFilter(readFilter, where);
readFilter.OnCreate();
// Add to chain, (filters buffers too).
}
if ((where & FilterChainOptions.Write) > 0)
{
if (!GetFilter(ctx, filter, true, out writeFilter, parameters))
{
//PhpException.Throw(PhpError.Warning, CoreResources.GetString("invalid_filter_name", filter));
//return false;
throw new ArgumentException(nameof(filter));
}
stream.AddFilter(writeFilter, where);
writeFilter.OnCreate();
// Add to chain.
}
return(true);
}
