![]() ![]() The example uses impersonation, so the identity that is running the client application must have permission to access the file. The client connects to the server process and sends a file name to the server. The following example shows the client process, which uses the NamedPipeClientStream class. Public Sub New(str As StreamString, filename As String)ĭim contents As String = File.ReadAllText(fn) ' Contains the method executed in the context of the impersonated user IoStream.Write(outBuffer, 0, outBuffer.Length) IoStream.WriteByte(CType(len And 255, Byte)) IoStream.WriteByte(CType(len \ 256, Byte)) Public Function WriteString(outString As String) As Integerĭim outBuffer() As Byte = streamEncoding.GetBytes(outString) Return streamEncoding.GetString(CType(inBuffer, Byte())) Len = CType(ioStream.ReadByte(), Integer)ĭim inBuffer As Array = Array.CreateInstance(GetType(Byte), len) Len = CType(ioStream.ReadByte(), Integer) * 256 StreamEncoding = New UnicodeEncoding(False, False) Private streamEncoding As UnicodeEncoding ' Defines the data protocol for reading and writing strings on our stream String^ contents = File::ReadAllText(fn) Īrray^ servers = gcnew array(numThreads) Ĭonsole::WriteLine("\n*** Named pipe server stream with impersonation example ***\n") Ĭonsole::WriteLine("Waiting for client connect.\n") Ĭonsole::WriteLine("Server thread[", e.Message) ReadFileToStream(StreamString^ str, String^ filename) ![]() Contains the method executed in the context of the impersonated user Return streamEncoding->GetString(inBuffer) Īrray^ outBuffer = streamEncoding->GetBytes(outString) ![]() Defines the data protocol for reading and writing strings on our stream If the client has sufficient permissions, the server process opens the file and sends its contents back to the client. The connected client process then supplies the server with a file name. Each thread can accept a client connection. In this example, the server process creates four threads. The following example demonstrates how to create a named pipe by using the NamedPipeServerStream class. To implement name pipes, use the NamedPipeServerStream and NamedPipeClientStream classes. Named pipes support full duplex communication over a network and multiple server instances, message-based communication, and client impersonation, which enables connecting processes to use their own set of permissions on remote servers. They offer more functionality than anonymous pipes, which provide interprocess communication on a local computer. Named pipes provide interprocess communication between a pipe server and one or more pipe clients. ![]()
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