HttpHeaderParser.cs

Go to the documentation of this file.

using System.Collections;
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
 
namespace System.Net.Http.Headers;
 
internal abstract class HttpHeaderParser
{
    private readonly bool _supportsMultipleValues;
 
    private readonly string _separator;
 
    public bool SupportsMultipleValues => _supportsMultipleValues;
 
    public string Separator => _separator;
 
    public virtual IEqualityComparer Comparer => null;
 
    protected HttpHeaderParser(bool supportsMultipleValues)
    {
        _supportsMultipleValues = supportsMultipleValues;
        if (supportsMultipleValues)
        {
            _separator = ", ";
        }
    }
 
    protected HttpHeaderParser(bool supportsMultipleValues, string separator)
    {
        _supportsMultipleValues = supportsMultipleValues;
        _separator = separator;
    }
 
    public abstract bool TryParseValue(string value, object storeValue, ref int index, [NotNullWhen(true)] out object parsedValue);
 
    public object ParseValue(string value, object storeValue, ref int index)
    {
        if (!TryParseValue(value, storeValue, ref index, out var parsedValue))
        {
            throw new FormatException(System.SR.Format(CultureInfo.InvariantCulture, System.SR.net_http_headers_invalid_value, (value == null) ? "<null>" : value.Substring(index)));
        }
        return parsedValue;
    }
 
    public virtual string ToString(object value)
    {
        return value.ToString();
    }
}