Ipchat (programme de chat complet et fini)
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Description
Ce programme permet de chatter par connection directe entre 2 machines (client et serveur).
Il utilise la classe Socket du .Net Framework, sans aucune dll extérieure.
Le programme de chat en lui même est complet et fonctionnel, mais il y a peu de fonctions.
Par contre il peut être très utile pour étudier le fonctionnement de la classe Socket, et la gestion client-serveur.
Tout est dans le zip.
Le code est très certainement améliorable, n'hésitez pas dans les commentaires ;)
Ce code servira de base a un projet bien plus important, il fera office de netcode dans un jeu multijoueur.
Spéciale dédicace a Ulmo, l'apprenti programmeur qui dépasse le maître :p
Il utilise la classe Socket du .Net Framework, sans aucune dll extérieure.
Le programme de chat en lui même est complet et fonctionnel, mais il y a peu de fonctions.
Par contre il peut être très utile pour étudier le fonctionnement de la classe Socket, et la gestion client-serveur.
Tout est dans le zip.
Source / Exemple :
Imports System.Text
Imports System.Net
Imports System.Net.Sockets
Imports System.IO
Public Class frmMain
Inherits System.Windows.Forms.Form
Dim IPHE As Net.IPHostEntry
Dim IPA() As Net.IPAddress
Dim HN As String
Dim TcpServer As System.Net.Sockets.TcpListener
Dim Buffer(1024) As Byte
Dim bytes As Integer
Dim strTemp As String
Dim ascii As Encoding = Encoding.ASCII
Dim Retour As DialogResult
Public IP As String
Public Socket As Socket = Nothing
Dim Request As String
Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
IpLocale()
If File.Exists("ipchat.ini") Then
Dim sr As New StreamReader("ipchat.ini")
Dim i As Integer = 0
Do Until sr.Peek = -1
If i = 0 Then
i = 1
txtNick.Text = sr.ReadLine
Else
txtIP.Text = sr.ReadLine
End If
Loop
sr.Close()
End If
End Sub
Private Sub txtIP_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtIP.DoubleClick
txtIP.Text = ""
End Sub
Private Sub IpLocale()
Dim strIP As String
HN = Net.Dns.GetHostName()
IPHE = Net.Dns.GetHostByName(HN)
IPA = IPHE.AddressList()
Dim i As Integer
For i = 0 To IPA.GetUpperBound(0)
strIP = strIP & IPA(i).ToString() & vbCrLf
Next
txtIpLocale.Text = strIP
End Sub
Private Sub Reset()
btnConnect.Text = "Se connecter"
btnServer.Text = "Héberger"
gpbServer.Enabled = True
gpbClient.Enabled = True
tmrConnect.Enabled = False
tmrWait.Enabled = False
Socket.Close()
Socket = Nothing
strTemp = ""
sbpConnection.Text = "Non connecté"
sbpConnection.Icon = New System.Drawing.Icon("TRFFC10C.ICO")
End Sub
Private Sub tmrConnect_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tmrConnect.Tick
If Socket.Available > 0 Then
bytes = Socket.Receive(Buffer, Buffer.Length, 0)
strTemp = strTemp + ascii.ASCII.GetString(Buffer, 0, bytes)
Select Case strTemp
Case ":connection:CLOSING"
Reset()
MessageBox.Show("Connexion coupée par le client ou l'hôte.", "Connexion", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
Exit Sub
Case ":connection:REFUSED"
Reset()
MessageBox.Show("Connexion refusée par l'hôte.", "Connexion", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
Exit Sub
Case ":connection:ACCEPTED"
MessageBox.Show("Connexion acceptée par l'hôte.", "Connexion", MessageBoxButtons.OK, MessageBoxIcon.Information)
strTemp = ""
sbpConnection.Text = "Connecté !"
sbpConnection.Icon = New System.Drawing.Icon("TRFFC10A.ICO")
End Select
If strTemp <> "" Then
txtAff.Text += strTemp & vbCrLf
strTemp = ""
End If
End If
End Sub
Private Sub SocketSend(ByVal server As String, ByVal port As Integer)
Request = txtNick.Text & " dit : " & vbCrLf & " " & txtMessage.Text
Dim ascii As Encoding = Encoding.ASCII
Dim bytesSent As [Byte]() = ascii.GetBytes(Request)
Request = ""
If txtNick.Text = "" Then
MessageBox.Show("Vous devez taper votre pseudo." & vbCrLf & "Envoi annulé...", "Pseudo", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
txtNick.Focus()
Exit Sub
ElseIf txtMessage.Text = "" Then
MessageBox.Show("Vous devez taper un message.", "Message", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
txtMessage.Focus()
Exit Sub
End If
If Socket Is Nothing Then
MessageBox.Show("Vous n'êtes pas connecté." & vbCrLf & "Envoi annulé...", "Connexion", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
Exit Sub
End If
Try
Socket.Send(bytesSent, bytesSent.Length, 0)
Catch ex As Exception
MessageBox.Show("Connexion coupée.", "Connexion", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
Reset()
Exit Sub
End Try
txtAff.Text += txtNick.Text & " dit : " & vbCrLf & " " & txtMessage.Text & vbCrLf
txtMessage.Text = ""
End Sub
Private Sub btnSend_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSend.Click
If Socket Is Nothing Then
MessageBox.Show("Non connecté.", "Connexion", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
Exit Sub
ElseIf txtMessage.Text = "" Then
Exit Sub
End If
SocketSend(IP, 8157)
End Sub
Private Sub txtAff_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtAff.TextChanged
If txtAff.Lines.Length > 17 Then
txtAff.Text = txtAff.Text.Remove(0, txtAff.Lines(0).Length + 2)
End If
End Sub
Private Sub tmrNow_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tmrNow.Tick
sbpDateSysteme.Text = Date.Now.ToString("dd/MM/yyyy")
sbpHeureSysteme.Text = Date.Now.ToString("HH:mm:ss")
End Sub
#Region "Partie Server"
Private Sub btnServer_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnServer.Click
If txtNick.Text = "" Then
MessageBox.Show("Vous devez indiquer votre pseudo." & vbCrLf & "Hébergement annulé.", "Erreur", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
txtNick.Focus()
Exit Sub
End If
If btnServer.Text = "Héberger" Then
btnServer.Text = "Arrêter d'héberger"
gpbClient.Enabled = False
TcpServer = New Net.Sockets.TcpListener(8157)
TcpServer.Start()
tmrWait.Enabled = True
sbpConnection.Text = "En attente de connexion ..."
sbpConnection.Icon = New System.Drawing.Icon("TRFFC10B.ICO")
Else
btnServer.Text = "Héberger"
gpbClient.Enabled = True
tmrWait.Enabled = False
tmrConnect.Enabled = False
TcpServer.Stop()
sbpConnection.Text = "Non connecté"
sbpConnection.Icon = New System.Drawing.Icon("TRFFC10C.ICO")
If Socket Is Nothing Then
Exit Sub
Else
If Socket.Connected = True Then
Request = ":connection:CLOSING"
Dim ascii As Encoding = Encoding.ASCII
Dim bytesSent As [Byte]() = ascii.GetBytes(Request)
Try
Socket.Send(bytesSent, bytesSent.Length, 0)
Socket.Close()
Socket = Nothing
Catch
Socket = Nothing
Exit Sub
End Try
End If
End If
Exit Sub
End If
End Sub
Private Sub tmrWait_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tmrWait.Tick
If TcpServer.Pending = True Then
tmrWait.Enabled = False
Socket = TcpServer.AcceptSocket()
TcpServer.Stop()
If Socket.Connected = True Then
If Socket.Available > 0 Then
strTemp = ""
bytes = Socket.Receive(Buffer, Buffer.Length, 0)
strTemp = strTemp + ascii.ASCII.GetString(Buffer, 0, bytes)
Retour = MessageBox.Show("Souhaitez vous accepter la connexion en provenance de : " & IPAddress.Parse((CType(Socket.RemoteEndPoint, IPEndPoint).Address.ToString())).ToString & " (" & strTemp & ")" & " ?", "Connexion", MessageBoxButtons.YesNo, MessageBoxIcon.Question)
strTemp = ""
If Retour = DialogResult.No Then
Request = ":connection:REFUSED"
Dim ascii As Encoding = Encoding.ASCII
Dim bytesSent As [Byte]() = ascii.GetBytes(Request)
Try
Socket.Send(bytesSent, bytesSent.Length, 0)
Socket.Close()
Socket = Nothing
Catch
Socket = Nothing
End Try
TcpServer.Start()
tmrWait.Enabled = True
Socket = Nothing
Else
Request = ":connection:ACCEPTED"
Dim ascii As Encoding = Encoding.ASCII
Dim bytesSent As [Byte]() = ascii.GetBytes(Request)
Try
Socket.Send(bytesSent, bytesSent.Length, 0)
Catch
End Try
tmrConnect.Enabled = True
sbpConnection.Text = "Connecté !"
sbpConnection.Icon = New System.Drawing.Icon("TRFFC10A.ICO")
End If
End If
Else
TcpServer.Start()
tmrWait.Enabled = True
End If
End If
End Sub
#End Region
#Region "Partie Client"
Private Sub btnConnect_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnConnect.Click
If btnConnect.Text = "Se connecter" Then
If Connexion() = True Then
tmrConnect.Enabled = True
btnConnect.Text = "Se déconnecter"
gpbServer.Enabled = False
sbpConnection.Text = "En attente de l'acceptation de la connexion..."
sbpConnection.Icon = New System.Drawing.Icon("TRFFC10B.ICO")
Else
Exit Sub
End If
Else
btnConnect.Text = "Se connecter"
gpbServer.Enabled = True
tmrConnect.Enabled = False
sbpConnection.Text = "Non connecté"
sbpConnection.Icon = New System.Drawing.Icon("TRFFC10C.ICO")
If Socket Is Nothing Then
Exit Sub
Else
If Socket.Connected = True Then
Request = ":connection:CLOSING"
Dim ascii As Encoding = Encoding.ASCII
Dim bytesSent As [Byte]() = ascii.GetBytes(Request)
Try
Socket.Send(bytesSent, bytesSent.Length, 0)
Socket.Close()
Catch
End Try
Socket = Nothing
End If
End If
End If
End Sub
Private Function Connexion() As Boolean
If ValidationIP(txtIP.Text) = False Then
MessageBox.Show("Adresse IP non valide !" & vbCrLf & "Connexion annulée.", "Connexion", MessageBoxButtons.OK, MessageBoxIcon.Error)
Return False
Exit Function
Else
IP = txtIP.Text
End If
If txtNick.Text = "" Then
MessageBox.Show("Vous devez taper votre pseudo." & vbCrLf & "Connexion annulée...", "Pseudo", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
txtNick.Focus()
Return False
Exit Function
End If
Dim ascii As Encoding = Encoding.ASCII
Dim Nick As String = txtNick.Text
Dim nickSent As [Byte]() = ascii.GetBytes(Nick)
Socket = ConnectSocket(IP, 8157)
Try
Socket.Send(nickSent, nickSent.Length, 0)
Catch ex As Exception
Return False
Exit Function
End Try
Return True
End Function
Private Shared Function ConnectSocket(ByVal server As String, ByVal port As Integer) As Socket
Dim Socket As Socket = Nothing
Dim hostEntry As IPHostEntry = Nothing
Try
hostEntry = Dns.Resolve(server)
Catch ex As Exception
If InStr(ex.ToString, "No such host") >= 1 Then
MessageBox.Show("Adresse IP non valide ou hôte non connecté.", "Connexion", MessageBoxButtons.OK, MessageBoxIcon.Error)
Exit Function
End If
MessageBox.Show(ex.ToString)
End Try
Dim address As IPAddress
For Each address In hostEntry.AddressList
Dim endPoint As New IPEndPoint(address, port)
Dim tempSocket As New Socket(endPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp)
Try
tempSocket.Connect(endPoint)
Catch
MessageBox.Show("Erreur lors de la connexion : hôte non joignable.", "Connexion", MessageBoxButtons.OK, MessageBoxIcon.Error)
Exit Function
End Try
If tempSocket.Connected Then
Socket = tempSocket
Exit For
Else
MessageBox.Show("Erreur lors de la connexion : non connecté.", "Connexion", MessageBoxButtons.OK, MessageBoxIcon.Error)
Exit Function
End If
Next address
Return Socket
End Function
Public Function ValidationIP(ByVal strIP As String) As Boolean
Try
Dim Br1 As String, Br2 As String, Br3 As String, Br4 As String
If InStr(strIP, ".") = 0 Then ValidationIP = False : Exit Function
Br1 = Microsoft.VisualBasic.Strings.Mid(strIP, 1, InStr(strIP, ".") - 1)
Br2 = Microsoft.VisualBasic.Strings.Mid(strIP, Len(Br1) + 2, (Len(strIP) - InStr(strIP, ".")) + 1)
Br2 = Microsoft.VisualBasic.Strings.Left(Br2, InStr(Br2, ".") - 1)
Br3 = Microsoft.VisualBasic.Strings.Mid(strIP, Len(Br1) + Len(Br2) + 3, Len(strIP))
Br3 = Microsoft.VisualBasic.Strings.Left(Br3, InStr(Br3, ".") - 1)
Br4 = Microsoft.VisualBasic.Strings.Mid(strIP, Len(Br1) + Len(Br2) + Len(Br3) + 4, Len(strIP))
If IsNumeric(Br1) = False Or IsNumeric(Br2) = False Or IsNumeric(Br3) = False Or IsNumeric(Br4) = False Then ValidationIP = False : Exit Function
If Not (CInt(Br1) >= 0 And CInt(Br1) <= 255) Or Not (CInt(Br2) >= 0 And CInt(Br2) <= 255) Or Not (CInt(Br3) >= 0 And CInt(Br3) <= 255) Or Not (CInt(Br4) >= 0 And CInt(Br4) <= 255) Then ValidationIP = False : Exit Function
ValidationIP = True
Exit Function
Catch
ValidationIP = False
End Try
End Function
#End Region
Private Sub frmMain_Closing(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing
tmrConnect.Enabled = False
Dim sw As New StreamWriter("ipchat.ini", False)
sw.WriteLine(txtNick.Text)
sw.WriteLine(txtIP.Text)
sw.Close()
If Socket Is Nothing Then
Else
If Socket.Connected = True Then
Request = ":connection:CLOSING"
Dim ascii As Encoding = Encoding.ASCII
Dim bytesSent As [Byte]() = ascii.GetBytes(Request)
Try
Socket.Send(bytesSent, bytesSent.Length, 0)
Socket.Close()
Catch
Exit Sub
End Try
End If
End If
End Sub
End Class
Conclusion :
Le code est très certainement améliorable, n'hésitez pas dans les commentaires ;)
Ce code servira de base a un projet bien plus important, il fera office de netcode dans un jeu multijoueur.
Spéciale dédicace a Ulmo, l'apprenti programmeur qui dépasse le maître :p
Merci
- Messages postés
-
256
- Date d'inscription
- mardi 25 novembre 2003
- Statut
- Membre
- Dernière intervention
- 6 novembre 2009
1Très utile. Merci à toi.
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