92 lines
3.0 KiB
VB.net
92 lines
3.0 KiB
VB.net
#Region "Microsoft.VisualBasic::57d4c2e623ef059ef9883a1d1fc0e7f8, Microsoft.VisualBasic.Core\Extensions\IO\StreamHelper.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 StreamHelper
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'
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' Function: CopyStream
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'
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' Sub: Write, WriteLine
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'
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' /********************************************************************************/
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#End Region
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Imports System.IO
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Imports System.Runtime.CompilerServices
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Imports System.Text
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Imports Microsoft.VisualBasic.CommandLine.Reflection
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Imports Microsoft.VisualBasic.Language
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Imports Microsoft.VisualBasic.Text
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Public Module StreamHelper
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''' <summary>
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''' Download stream data from the http response.
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''' </summary>
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''' <param name="stream">
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''' Create from <see cref="WebServiceUtils.GetRequestRaw(String, Boolean, String)"/>
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''' </param>
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''' <returns></returns>
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<ExportAPI("Stream.Copy", Info:="Download stream data from the http response.")>
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<Extension> Public Function CopyStream(stream As Stream, Optional target As Stream = Nothing, Optional bufferSize% = 64 * 1024) As Stream
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If stream Is Nothing Then
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Return If(target, New MemoryStream)
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End If
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Dim buffer As Byte() = New Byte(bufferSize - 1) {}
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Dim i As int = Scan0
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With target Or DirectCast(New MemoryStream(), Stream).AsDefault
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Do While (i = stream.Read(buffer, 0, buffer.Length)) > 0
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Call .Write(buffer, 0, i)
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Loop
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Return .ByRef
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End With
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End Function
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<Extension>
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Public Sub Write(stream As Stream, value$, Optional encoding As Encoding = Nothing)
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With (encoding Or UTF8).GetBytes(value)
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Call stream.Write(.ByRef, Scan0, .Length)
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Call stream.Flush()
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End With
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End Sub
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<Extension>
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Public Sub WriteLine(stream As Stream, Optional value$ = "", Optional encoding As Encoding = Nothing, Optional newLine$ = vbCrLf)
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Call stream.Write(value & newLine, encoding)
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End Sub
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End Module
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