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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System;
using Microsoft.Net.Http.Headers;
namespace Microsoft.AspNetCore.WebUtilities
{
/// <summary>
/// Various extensions for converting multipart sections
/// </summary>
public static class MultipartSectionConverterExtensions
{
/// <summary>
/// Converts the section to a file section
/// </summary>
/// <param name="section">The section to convert</param>
/// <returns>A file section</returns>
public static FileMultipartSection? AsFileSection(this MultipartSection section)
{
if (section == null)
{
throw new ArgumentNullException(nameof(section));
}
try
{
return new FileMultipartSection(section);
}
catch
{
return null;
}
}
/// <summary>
/// Converts the section to a form section
/// </summary>
/// <param name="section">The section to convert</param>
/// <returns>A form section</returns>
public static FormMultipartSection? AsFormDataSection(this MultipartSection section)
{
if (section == null)
{
throw new ArgumentNullException(nameof(section));
}
try
{
return new FormMultipartSection(section);
}
catch
{
return null;
}
}
/// <summary>
/// Retrieves and parses the content disposition header from a section
/// </summary>
/// <param name="section">The section from which to retrieve</param>
/// <returns>A <see cref="ContentDispositionHeaderValue"/> if the header was found, null otherwise</returns>
public static ContentDispositionHeaderValue? GetContentDispositionHeader(this MultipartSection section)
{
if (!ContentDispositionHeaderValue.TryParse(section.ContentDisposition, out var header))
{
return null;
}
return header;
}
}
}
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