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/*
* Copyright (c) 2024 Vaughn Nugent
*
* Library: VNLib
* Package: VNLib.Net.Http
* File: HttpBufferConfig.cs
*
* HttpBufferConfig.cs is part of VNLib.Net.Http which is part of the larger
* VNLib collection of libraries and utilities.
*
* VNLib.Net.Http is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* VNLib.Net.Http is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see https://www.gnu.org/licenses/.
*/
namespace VNLib.Net.Http
{
/// <summary>
/// Holds configuration constants for http protocol buffers
/// </summary>
public readonly record struct HttpBufferConfig()
{
/// <summary>
/// The maximum buffer size to use when parsing Multi-part/Form-data file uploads
/// </summary>
/// <remarks>
/// This value is used to create the buffer used to read data from the input stream
/// into memory for parsing. Form-data uploads must be parsed in memory because
/// the data is not delimited by a content length.
/// </remarks>
public readonly int FormDataBufferSize { get; init; } = 8192;
/// <summary>
/// The buffer size used to read HTTP headers from the transport.
/// </summary>
/// <remarks>
/// Setting this value too low will result in header parsing failures
/// and 400 Bad Request responses. Setting it too high can result in
/// resource abuse or high memory usage. 8k is usually a good value.
/// </remarks>
public readonly int RequestHeaderBufferSize { get; init; } = 8192;
/// <summary>
/// The size (in bytes) of the http response header accumulator buffer.
/// </summary>
/// <remarks>
/// Http responses use an internal accumulator to buffer all response headers
/// before writing them to the transport in on write operation. If this value
/// is too low, the response will fail to write. If it is too high, it
/// may cause resource exhaustion or high memory usage.
/// </remarks>
public readonly int ResponseHeaderBufferSize { get; init; } = 16 * 1024;
/// <summary>
/// The size of the buffer to use when writing response data to the transport
/// </summary>
/// <remarks>
/// This value is the size of the buffer used to copy data from the response
/// entity stream, to the transport stream.
/// </remarks>
public readonly int ResponseBufferSize { get; init; } = 32 * 1024;
/// <summary>
/// The size of the buffer used to accumulate chunked response data before writing to the transport.
/// May be set to 0 when <see cref="HttpConfig.CompressorManager"/> is set to null (compression is disabled).
/// </summary>
public readonly int ChunkedResponseAccumulatorSize { get; init; } = 64 * 1024;
/// <summary>
/// When a transport connection is closed, dedicated buffers are released back to the
/// heap. This setting controls whether the buffers are all zeroed before being released.
/// </summary>
public readonly bool ZeroBuffersOnDisconnect { get; init; } = true;
}
}
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