Prezentacja programu PowerPoint

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NETWORKING tworzenie polaczen sieciowych       
gniazda UDP, TCP        klasy transportowe      
  klasy protokólów        programowanie
asynchroniczne
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       gniazda UDP - odbiorca Socket listener
new Socket(AddressFamily.InterNetwork,
SocketType.Dgram, ProtocolType.Udp) IPEnd
Point localEP // adres odbiorcy new
IPEndPoint(IPAddress.Any, 5001) listener.Bind(loc
alEP)
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IPEndPoint tempRemoteEP // adres nadawcy
new IPEndPoint(IPAddress.Any,
5002) EndPoint trEP (EndPoint)tempRemoteEP
listener.Poll(-1, SelectMode.SelectRead) lis
tener.ReceiveFrom(buffer, ref trEP)
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- nadawca string listener "localhost" Socket
client new Socket(AddressFamily.InterNet
work, SocketType.Dgram,
ProtocolType.Udp) IPEndPoint localEP // adres
nadawcy new IPEndPoint(IPAddress.Any,
5002) client.Bind(localEP)
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buffer Encoding.ASCII.GetBytes(message) ipaddre
ss Dns.GetHostEntry(listener).Addre
ssList0 IPEndPoint remoteEP // adres
odbiorcy new IPEndPoint(ipaddress,
5001) client.SendTo(buffer, 0, buffer.Length,
SocketFlags.None, remoteEP)
UDPSocket
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       gniazda TCP - odbiorca Socket
GetListenerSocket(string host, int port)
Socket s null, ts IPEndPoint
lep IPHostEntry iphe Dns.GetHostEntry(host)
foreach(IPAddress ipa in iphe.AddressList)
lep new IPEndPoint(ipa, port) ts new
Socket(lep.AddressFamily,
SocketType.Stream, ProtocolType.Tcp)
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try ts.Bind(lep) ts.Listen(2) // max 2
waiting connections s ts break catch ( .
. . ) . . . return s
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Socket server GetListenerSocket("localhost",
5010) Socket s server.Accept() byte
responseData new byte128 int
bytesRead try bytesRead s.Receive(responseDa
ta) . . . catch . . . ...
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- nadawca Socket GetSocket(string host, int
port) Socket s null, ts IPEndPoint
ipe IPHostEntry iphe ns.GetHostEntry(host)
foreach(IPAddress ipa in iphe.AddressList)
ipe new IPEndPoint(ipa, port) ts new
Socket(ipe.AddressFamily,
SocketType.Stream, ProtocolType.Tcp)
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try ts.Connect(ipe) s ts break
catch ( . . .) . . . return s Socket
s GetSocket("localhost", 5010) if(s
null) return s.Send(buffer)
TCPSocket
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       klasa transportowa UDP UdpClient -
odbiorca UdpClient listener new
UdpClient(port) IPEndPoint remoteEp
new IPEndPoint(IPAddress.Any, port)   byte
buffer listener.Receive(ref remoteEp)
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- nadawca UdpClient client new
UdpClient(port) byte buffer
Encoding.ASCII.GetBytes(message) client.Send(buf
fer, buffer.Length, listener,
port) client.Close()
UDPClass
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       klasy transportowe TCP TcpListener
TcpClient - odbiorca TcpListener listener
new TcpListener(port) listener.Start() if
(listener.Pending()) TcpClient s
listener.AcceptTcpClient() NetworkStream
stream s.GetStream() // int bytesRead
stream.Read(responseData, 0,
responseData.Length) // byte
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- nadawca TcpClient client new
TcpClient() client.Connect(listener,
port) NetworkStream stream client.GetStream()
stream.Write(buffer, 0, buffer.Length) // if
(stream.DataAvailable) bytesRead
stream.Read(buffer, 0, buffer.Length)
TCPClasses
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       przesylanie z wykorzystaniem protokólu
SOAP - odbiorca NetworkStream ns
tcpclient.GetStream() SoapFormatter channel
new SoapFormatter() message (string)channel.Des
erialize(ns) - nadawca SoapFormatter
channel new SoapFormatter() channel.Serialize(t
cpclient.GetStream(), message)
TCPSOAP
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       klasy protokólów - FTP - klasa
WebClient Uri libra new Uri (_at_"ftp//man.put.poz
nan.pl/Nowy.txt") if (libra.Scheme !
Uri.UriSchemeFtp) return WebClient request
new WebClient() request.Credentials new
NetworkCredential(name,
pass) // request.DownloadFile(libra.ToString(),
_at_"Nowy.txt")
// request.UploadFile(libra.ToString(),
_at_"Nowy.txt")
Get1
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- klasy FtpWebRequest
FtpWebResponse Uri libra new
Uri(_at_"ftp//man.put.poznan.pl") FtpWebRequest
request (FtpWebRequest)FtpWebRequest.Create(l
ibra) request.Credentials new
NetworkCredential(name, pass) request.UseBinary
false request.Method
WebRequestMethods.Ftp.ListDirectory FtpWebRespons
e response (FtpWebResponse)request.GetRe
sponse() Stream responseStream
response.GetResponseStream()
Get2
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       klasy protokólów - HTTP, HTTPS,
FILE - WebClient string address
_at_"http//www.cs.put.poznan.pl/jkniat/HT.html" //
_at_"https//poczta.put.poznan.pl" //
_at_"file//D/HT.html WebClient wc new
WebClient() // Console.WriteLine(Encoding.ASCII.G
etString (wc.DownloadData(add
ress))) // wc.DownloadFile(address,
"HTcopy.html")
Get1
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- WebRequest WebResponse string address
_at_"http//www.cs.put.poznan.pl/jkniat/HT.html" We
bRequest request WebRequest.Create(address) Web
Response response request.GetResponse() Stream
Reader reader new StreamReader(response.GetRe
sponseStream(),
Encoding.ASCII) Console.WriteLine(reader.ReadToEn
d())
Get2, HTTPpage
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       programowanie asynchroniczne - TCP
Socket Server ManualResetEvent AcceptEvent
new
ManualResetEvent(false) // ManualResetEvent
ReceiveEvent
new ManualResetEvent(false) //
synchronizacja watków za pomoca zglaszania //
zdarzen i oczekiwania na zdarzenia//
.WaitOne() .Set() .Reset()
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void Start() Socket srv GetLisSocket
("localhost", port) AcceptEvent.Reset() ReceiveE
vent.Reset() srv.BeginAccept( new
AsyncCallback(AcceptCallback),
srv) AcceptEvent.WaitOne() // oczekiwanie na
sygnal
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void AcceptCallback(IAsyncResult result) Socket
temp (Socket) result.AsyncState Socket a
temp.EndAccept(result) asyncData.socket a
IAsyncResult recres a.BeginReceive(ad.RecBytes,
0, 256, 0, new AsyncCallback(ReceiveCallbac
k), ad)  ReceiveEvent.WaitOne() //
oczekiwanie AcceptEvent.Set() // sygnal
dla Start
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void ReceiveCallback(IAsyncResult
result) int bytes
ad.socket.EndReceive(result) if (bytes gt 0)
string data Encoding.ASCII.GetString(ad.Re
cBytes, 0, bytes)
Console.WriteLine("Odebrano " data
"\n")
ReceiveEvent.Set() // sygnal dla
AcceptCallback
AsyTCP
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- HTTP string address _at_"http//www.cs.put.pozn
an.pl" WebRequest request WebRequest.Create(ad
dress) AsyncResponseData ad
new AsyncResponseData(request) IAsyncResult
responseResult
request.BeginGetResponse (new
AsyncCallback(ResponseCallback),
ad)
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void ResponseCallback(IAsyncResult
result) AsyncResponseData ar
(AsyncResponseData)result.AsyncState
WebRequest request ar.Request WebResponse
response
request.EndGetResponse(result) Stream stream
response.GetResponseStream() AsyncReadData ad
new AsyncReadData(stream) IAsyncResult
readResult
stream.BeginRead(ad.Buffer, 0,
ad.Buffer.Length,
new AsyncCallback(ReadCallback),
ad) .
. .
AsyPage