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/*
* Copyright (c) 2024 Vaughn Nugent
*
* Library: VNLib
* Package: VNLib.Plugins.Essentials.Accounts.AppData
* File: HttpExtensions.cs
*
* HttpExtensions.cs is part of VNLib.Plugins.Essentials.Accounts.AppData which
* is part of the larger VNLib collection of libraries and utilities.
*
* VNLib.Plugins.Essentials.Accounts 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.Plugins.Essentials.Accounts 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/.
*/
using System;
using System.Net;
using VNLib.Net.Http;
namespace VNLib.Plugins.Essentials.Accounts.AppData.Model
{
internal static class HttpExtensions
{
const string ChecksumHeader = "X-Data-Checksum";
public static void SetRecordResponse(this HttpEntity entity, UserRecordData record, HttpStatusCode code)
{
//Set checksum header
entity.Server.Headers.Append(ChecksumHeader, $"{record.Checksum}");
//Set the response to a new memory reader with the record data
entity.CloseResponse(
code,
ContentType.Binary,
new BinDataRecordReader(record.Data)
);
}
public static ulong? GetUserDataChecksum(this IConnectionInfo server)
{
string? checksumStr = server.Headers[ChecksumHeader];
return string.IsNullOrWhiteSpace(checksumStr) && ulong.TryParse(checksumStr, out ulong checksum) ? checksum : null;
}
sealed class BinDataRecordReader(byte[] recordData) : IMemoryResponseReader
{
private int _read;
///<inheritdoc/>
public int Remaining => recordData.Length - _read;
///<inheritdoc/>
public void Advance(int written) => _read += written;
///<inheritdoc/>
public void Close()
{
//No-op
}
///<inheritdoc/>
public ReadOnlyMemory<byte> GetMemory() => recordData.AsMemory(_read);
}
}
}
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