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MimeUtil.cs
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MimeUtil.cs
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/*
* Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.Runtime.InteropServices;
namespace Tizen.Content.MimeType
{
/// <summary>
/// The MimeUtil API provides functions to map the MIME types to file extensions and vice versa.
/// </summary>
/// <remarks>
/// Conversions are provided from the file extensions to MIME types and from the MIME types to file extensions.
/// </remarks>
/// <since_tizen> 3 </since_tizen>
public static class MimeUtil
{
/// <summary>
/// Gets the MIME type for the given file extension.
/// The MIME type is 'application/octet-stream' if the given file extension is not associated with specific file formats.
/// </summary>
/// <param name="fileExtension"> The file extension.</param>
/// <example>
/// <code>
/// string mimeType = MimeUtil.GetMimeType("png");
/// </code>
/// </example>
/// <since_tizen> 3 </since_tizen>
public static string GetMimeType(string fileExtension)
{
string mime;
int res = Interop.Mime.GetMime(fileExtension, out mime);
if (res != (int)MimeError.None)
{
throw MimeExceptionFactory.CreateException((MimeError)res);
}
return mime;
}
/// <summary>
/// Gets the file extensions for the given MIME type.
/// </summary>
/// <returns>
/// If successful, returns the list of file extension strings for the given MIME type.
/// The array of file extension is without the leading dot ('.').
/// </returns>
/// <param name="mime"> The MIME type.</param>
/// <example>
/// <code>
/// var extColl = MimeUtil.GetFileExtension("video/mpeg");
/// foreach ( string obj in extColl )
/// {
/// Console.WriteLine(obj);
/// }
/// </code>
/// </example>
/// <since_tizen> 3 </since_tizen>
public static IEnumerable<string> GetFileExtension(string mime)
{
IntPtr extensionArray = IntPtr.Zero;
int length = -1;
int res = Interop.Mime.GetFile(mime, out extensionArray, out length);
if (res != (int)MimeError.None)
{
throw MimeExceptionFactory.CreateException((MimeError)res);
}
IntPtr[] extensionList = new IntPtr[length];
Marshal.Copy(extensionArray, extensionList, 0, length);
Collection<string> coll = new Collection<string>();
foreach (IntPtr extension in extensionList)
{
coll.Add(Marshal.PtrToStringAnsi(extension));
Interop.Libc.Free(extension);
}
Interop.Libc.Free(extensionArray);
return coll;
}
internal enum MimeError : int
{
None = Tizen.Internals.Errors.ErrorCode.None,
InvalidParameter = Tizen.Internals.Errors.ErrorCode.InvalidParameter,
OutOfMemory = Tizen.Internals.Errors.ErrorCode.OutOfMemory,
IoError = Tizen.Internals.Errors.ErrorCode.IoError,
}
}
}