Need help on named pipes on Windows

[sspremj]

Hi All,

Not able to make the below code work. Getting Error in readLines(serverPipe) : invalid connection.

Please help.

serverPipe <- pipe("\\\\.\\pipe\\mserver", open = 'r', "UTF-8")

if (serverPipe)
{
  print(serverPipe)

  while(TRUE)
    {
        Sys.sleep(1)

        message  <- readLines(serverPipe)

      if(length(message)) print(message, stdout())


      if(all(message == "client closing"))
      {
        close(serverPipe)
      }
    }
}

[andresrcs]

Hi!

To help us help you, could you please prepare a reproducible example (reprex) illustrating your issue and provide a little more information about what are you trying to achieve with this code? Please have a look at this guide, to see how to create a reprex:

FAQ: How to do a minimal reproducible example ( reprex ) for beginners

A minimal reproducible example consists of the following items: A minimal dataset, necessary to reproduce the issue The minimal runnable code necessary to reproduce the issue, which can be run on the given dataset, and including the necessary information on the used packages. Let's quickly go over each one of these with examples: Minimal Dataset (Sample Data) You need to provide a data frame that is small enough to be (reasonably) pasted on a post, but big enough to reproduce your issue. Let's say, as an example, that you are working with the iris data frame head(iris) #> Sepal.Length Sepal.Width Petal.Length Petal.Width Species #> 1 5.1 3.5 1.4 0.…

[sspremj]

Hi,

Thanks for letting me know how to post here.

Regards

[sspremj]

Hi,

I am trying to open a named pipe connection on Windows 7 and it is not working. Please help.

serverPipe <- pipe("\\\\.\\pipe\\mserver", open = 'r', "UTF-16")

if (serverPipe)
{
  print(serverPipe)
  str(serverPipe)
  
  message <- ""
  
  while(TRUE)
    {
        Sys.sleep(1)

        message  <- readLines(serverPipe)

      if(length(message)) print(message)

      if(all(message == "client closing"))
      {
        close(serverPipe)
      }
    }
}
#> A connection with                                  
#> description "\\\\.\\pipe\\mserver"
#> class       "pipe"                
#> mode        "r"                   
#> text        "text"                
#> opened      "opened"              
#> can read    "yes"                 
#> can write   "no"                  
#>  'pipe' int 4
#>  - attr(*, "conn_id")=<externalptr>
#> Warning in readLines(serverPipe): line 1 appears to contain an embedded nul
#> Error in readLines(serverPipe): invalid connection

^{Created on 2019-05-27 by the reprex package (v0.3.0)}