Ich habe vor kurzem an einem Javascript gearbeitet, das socket.io, node.js und express.js verwendet. Hier ist der Servercode.node.js TypeError: Der Pfad muss eine Zeichenfolge sein. Empfangene Null
var
port = +process.argv[2] || 8080,
sanitizer = require('validator').sanitize,
express = require('express'),
server = express.createServer(),
io = require('socket.io').listen(server),
chat = io.of('/chat'),
canvas = io.of('/canvas')
;
function sanitize(string) {
return sanitizer(string).entityDecode()
}
server.listen(port);
server.get(/(^\/.*$)/, function(request, response) {
var fileName = request.params[0];
if (fileName == '/')
fileName = '/index.html';
response.sendfile(__dirname + '/client' + fileName);
});
io.sockets.on('connection', function(socket) {
socket.on('setName', function (name) {
name = sanitize(name);
socket.set('name', name);
socket.broadcast.emit('receive', {
sender:'Server',
message:name + ' has joined.'
})
});
socket.on('send', function (message) {
socket.get('name', function(error, name) {
if (name)
socket.broadcast.emit('receive', {
sender:name,
message:sanitize(message)
})
})
});
socket.on('draw', function (command) {
io.sockets.emit('draw', command)
});
socket.on('updateCursor', function(position) {
socket.get('name', function(error, name) {
if (name)
socket.broadcast.emit('updateCursor', {
name:name,
position:position
});
});
});
socket.on('disconnect', function() {
socket.get('name', function(error, name) {
if (name) {
socket.broadcast.emit('receive', {
sender:'Server',
message:name + ' has left.'
});
socket.broadcast.emit('removeCursor', name);
}
})
});
});
Ich kann den Server erfolgreich einzurichten, aber wenn ich die localhost im Browser verwenden, erhalte ich folgende Fehlermeldung:
TypeError: Path must be a string. Received null at assertPath (path.js:8:11) at win32.join (path.js:221:5) at exports.send (C:\Users\Akshay\Desktop\whiteboard-master\whiteboard-master\node_modules\express\node_modules\connect\lib\middleware\static.js:127:20) at ServerResponse.res.sendfile (C:\Users\Akshay\Desktop\whiteboard-master\whiteboard-master\node_modules\express\lib\response.js:186:3) at C:\Users\Akshay\Desktop\whiteboard-master\whiteboard-master\server.js:23:14 at callbacks (C:\Users\Akshay\Desktop\whiteboard-master\whiteboard-master\node_modules\express\lib\router\index.js:272:11) at param (C:\Users\Akshay\Desktop\whiteboard-master\whiteboard-master\node_modules\express\lib\router\index.js:246:11) at pass (C:\Users\Akshay\Desktop\whiteboard-master\whiteboard-master\node_modules\express\lib\router\index.js:253:5) at Router._dispatch (C:\Users\Akshay\Desktop\whiteboard-master\whiteboard-master\node_modules\express\lib\router\index.js:280:5) at Object.Router.middleware [as handle] (C:\Users\Akshay\Desktop\whiteboard-master\whiteboard-master\node_modules\express\lib\router\index.js:45:10)
ich diese entwickelt hatte Verwenden der instabilen v0.5.8 Windows-Binärversion des Knotens. aber ich führe gerade die Version 4.4.5.
Bitte helfen Sie mir, wo bin ich falsch gelaufen?
Vielen Dank. Ich werde das versuchen. Ich habe versucht, die index.html-Datei getrennt laufen zu lassen, es lief ohne Probleme, aber ich werde das nochmal überprüfen –