In typical UNIX fashion, read(2) returns 0 bytes to indicate end-of-file which can mean: There are no more bytes in a file The other end of a socket has shutdown the connection The writer has closed a pipe In your case, fifo.read() is returning an empty string, because the writer has closed its file descriptor. … Read more
Use Named Pipes to Communicate Between Java and .Net Processes Relevant part in the link try { // Connect to the pipe RandomAccessFile pipe = new RandomAccessFile(“\\\\.\\pipe\\testpipe”, “rw”); String echoText = “Hello word\n”; // write to pipe pipe.write ( echoText.getBytes() ); // read response String echoResponse = pipe.readLine(); System.out.println(“Response: ” + echoResponse ); pipe.close(); } … Read more
Update (as I can’t delete the accepted answer): the proper solution is to implement a custom demuxer, similar to the concat one. There’s currently no other clean way. You have to get your hands dirty and code! Below is an ugly hack. This is a very bad way to do it, just don’t! The solution … Read more
i had the same issue. go to Sql Server Configuration management->SQL Server network config->protocols for ‘servername’ and check named pipes is enabled.
There are two things which can cause the instantiation of a second or subsequent NamedPipeServerStream on the same pipe to fail: the maxNumberOfServerInstances ctor argument must have been set to more than 1 when the first instance of the pipe server was created. If not, the second call will fail unless the first instance has … Read more
Working with named pipes on Windows Node v0.12.4 var net = require(‘net’); var PIPE_NAME = “mypipe”; var PIPE_PATH = “\\\\.\\pipe\\” + PIPE_NAME; var L = console.log; var server = net.createServer(function(stream) { L(‘Server: on connection’) stream.on(‘data’, function(c) { L(‘Server: on data:’, c.toString()); }); stream.on(‘end’, function() { L(‘Server: on end’) server.close(); }); stream.write(‘Take it easy!’); }); server.on(‘close’,function(){ … Read more
It will be the same (or at least not measurably different). Winsock is smart enough to know if it’s talking to a socket on the same host and, in that case, it will short-circuit pretty much everything below IP and copy data directly buffer-to-buffer. In terms of named pipes vs. sockets, if you need to … Read more
This is cheesy, but it is the only method I have gotten to work. Create a ‘fake’ client and connect to your named pipe to move past the WaitForConnection. Works every time. Also, even Thread.Abort() did not fix this issue for me. _pipeserver.Dispose(); _pipeserver = null; using (NamedPipeClientStream npcs = new NamedPipeClientStream(“pipename”)) { npcs.Connect(100); }
In order to connect to an existing named pipe you can utilize the CreateFile API provided through the pywin32 package. Since it took me a while to put a working base together here is an example client/server which works fine for me (python 3.6.5, pywin32 223 on Windows 10 Pro x64): import time import sys … Read more
The pipe transmission mode is a Windows operating system concept, not a .NET concept. If a pipe is created in Message mode, each write to the pipe by the sender is treated as a separate message. The receiver can read from the pipe either: in Byte mode, when the data is read from the pipe … Read more