117 lines
4.2 KiB
VB.net
117 lines
4.2 KiB
VB.net
#Region "Microsoft.VisualBasic::3d1bbe2951d4f0384bac47ae53e926de, Microsoft.VisualBasic.Core\Net\MIME\MIME.vb"
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' Author:
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'
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' asuka (amethyst.asuka@gcmodeller.org)
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' xie (genetics@smrucc.org)
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' xieguigang (xie.guigang@live.com)
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'
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' Copyright (c) 2018 GPL3 Licensed
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'
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'
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' GNU GENERAL PUBLIC LICENSE (GPL3)
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'
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'
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' This program is free software: you can redistribute it and/or modify
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' it under the terms of the GNU General Public License as published by
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' the Free Software Foundation, either version 3 of the License, or
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' (at your option) any later version.
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'
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' This program is distributed in the hope that it will be useful,
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' but WITHOUT ANY WARRANTY; without even the implied warranty of
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' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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' GNU General Public License for more details.
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'
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' You should have received a copy of the GNU General Public License
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' along with this program. If not, see <http://www.gnu.org/licenses/>.
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' /********************************************************************************/
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' Summaries:
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' Module MIME
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'
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' Properties: ContentTypes, SuffixTable, UnknownType
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'
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' Constructor: (+1 Overloads) Sub New
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' Function: __loadContents
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'
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'
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' /********************************************************************************/
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#End Region
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Imports System.Runtime.CompilerServices
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Namespace Net.Protocols.ContentTypes
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''' <summary>
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''' MIME stands for "Multipurpose Internet Mail Extensions. It's a way of identifying files on the Internet according to their nature and format.
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''' For example, using the ``Content-type`` header value defined in a HTTP response, the browser can open the file with the proper extension/plugin.
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''' (http://www.freeformatter.com/mime-types-list.html)
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''' </summary>
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Public Module MIME
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''' <summary>
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''' 枚举出所有已知的文件拓展名列表，Key全部都是小写的 (格式: ``.ext``)
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''' </summary>
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''' <returns></returns>
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Public ReadOnly Property SuffixTable As IReadOnlyDictionary(Of String, ContentType)
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''' <summary>
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''' 根据类型来枚举，Key全部都是小写的
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''' </summary>
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''' <returns></returns>
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Public ReadOnly Property ContentTypes As IReadOnlyDictionary(Of String, ContentType)
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''' <summary>
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''' .*（ 二进制流，不知道下载文件类型）
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''' </summary>
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Public Const Unknown As String = "application/octet-stream"
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Public Const MsDownload As String = "application/x-msdownload"
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Public Const Json As String = "application/json"
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Public Const ZIP As String = "application/zip"
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Public Const Png As String = "image/png"
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Public ReadOnly Property UnknownType As New ContentType With {
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.FileExt = "*.*",
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.MIMEType = Unknown,
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.Name = NameOf(Unknown)
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}
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Sub New()
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SuffixTable = My.Resources _
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.List_of_MIME_types___Internet_Media_Types_ _
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.LineTokens _
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.__loadContents _
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.Where(Function(x) Not x.IsEmpty) _
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.GroupBy(Function(x) x.FileExt.ToLower) _
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.ToDictionary(Function(x) x.Key,
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Function(x) x.First)
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ContentTypes = SuffixTable.Values _
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.ToDictionary(Function(x) x.MIMEType.ToLower)
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End Sub
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<Extension>
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Private Iterator Function __loadContents(lines As IEnumerable(Of String)) As IEnumerable(Of ContentType)
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lines = From line As String
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In lines.Skip(1)
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Where Not String.IsNullOrWhiteSpace(line)
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Select line
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For Each line$ In lines
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Try
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' 2016-11-28
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' Not sure why a bugs happed here, there is no bugs here before!
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Yield ContentType.__createObject(line)
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Catch ex As Exception
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#If DEBUG Then
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Call line.Warning
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#End If
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End Try
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Next
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End Function
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End Module
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End Namespace
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