Problem with pipe : EPIPE read.

[ambrt]

I'm trying to make a pipe request to Dropbox application on window (not the Dropbox API)
But i'm getting

{ [Error: read EPIPE] code: 'EPIPE', errno: 'EPIPE', syscall: 'read' }

Could anyone look into this code an tell what might be wrong?

var net = require('net');
var ffi = require('ffi');
var ref = require('ref');
var BufferStream = require('node-bufferstream')

var PIPE_PATH = "\\\\.\\pipe\\DropboxPipe_1"
var UserName = "YourUserName"
var L = console.log;
var struct = require('python-struct');

var SessionId = ref.alloc("uint");

var encoding = require("encoding");

var kernel32 = new ffi.Library("kernel32",{
    GetLastError:['string',[]],
    GetCurrentProcessId: ['int',[]] ,
    GetCurrentThreadId: ['int',[]],
    ProcessIdToSessionId: ['bool',['int','uint *']],
    CallNamedPipeA:['bool',[]]

});



var RequestInfo = 0x3048302;
var ProcessId = kernel32.GetCurrentProcessId();
var ThreadId = kernel32.GetCurrentThreadId();
var RequestType =1;
var dropbox = ref.types.void;

if(!kernel32.ProcessIdToSessionId(ProcessId,SessionId )){
    console.log(kernel32.GetLastError());
}
else{
    //console.log(SessionId);
    SessionId.type = ref.types.int;
    SessionIdInt = SessionId.deref();
    console.log(SessionIdInt);
}

var mypath = "C:/Users/"+UserName+"/Dropbox/"
var L = console.log;



var client = net.createConnection({ path: '\\\\.\\pipe\\DropboxPipe_1'}, function () { 
    console.log('connected');
    var wtf = 0x3048302;
    var request = struct.pack("LLLL",wtf,ProcessId, ThreadId,RequestType)  + encoding.convert(mypath,"utf-16le")
    var str = new Array(540 + 1).join( String.fromCharCode(0) );
    request = request + str;
    var request = request.substr(0,540);
    client.write(request, ()=>{
        console.log("write callback"); //this part is written to console
        console.log(client.bytesWritten) // 550
        console.log(client.bytesRead)    //0
    });                                                                               

});


client.on("error", function(e) { console.log(e); });

client.on('data', function(data) {
    L('Client: on data:', data.toString());
    client.end('Thanks!');
});

client.on('end', function() {
    L('Client: on end');
})

[mscdex]

This is probably best asked on the nodejs/help repo unless it can be verified that there is a bug in node.

[Fishrock123]

{ [Error: read EPIPE] code: 'EPIPE', errno: 'EPIPE', syscall: 'read' }

Could anyone look into this code an tell what might be wrong?

tl;dr: you're piping to a closed stream/file descriptor somewhere, perhaps something is closing it prematurely?