HttpListenerResponse.Close Metodo

Definizione

Invia la risposta al client e rilascia le risorse contenute nell'istanza di HttpListenerResponse.Sends the response to the client and releases the resources held by this HttpListenerResponse instance.

Overload

Close()

Invia la risposta al client e rilascia le risorse contenute nell'istanza di HttpListenerResponse.Sends the response to the client and releases the resources held by this HttpListenerResponse instance.

Close(Byte[], Boolean)

Invia la matrice di byte specificata al client e rilascia le risorse contenute nell'istanza di HttpListenerResponse.Returns the specified byte array to the client and releases the resources held by this HttpListenerResponse instance.

Close()

Invia la risposta al client e rilascia le risorse contenute nell'istanza di HttpListenerResponse.Sends the response to the client and releases the resources held by this HttpListenerResponse instance.

public:
 void Close();
public void Close ();
member this.Close : unit -> unit
Public Sub Close ()

Esempi

Nell'esempio di codice seguente viene illustrata la chiamata a questo metodo per inviare una risposta Forbidden (403) al client.The following code example demonstrates calling this method to send a Forbidden (403) response to the client.

static string message403;
static HttpListenerResponse preMade403Response;
static void SendBadCertificateResponse(HttpListenerResponse response)
{
    if (preMade403Response == null)
    {
        // Set up an authentication error response template.
        response.StatusCode = (int)HttpStatusCode.Forbidden;
        response.StatusDescription = "403 Forbidden";
        response.ProtocolVersion = new Version("1.1");
        response.SendChunked = false;

        preMade403Response = response;
    }
    else
    {
        response.CopyFrom(preMade403Response);
    }

    // The response body cannot be saved in the template.

    StringBuilder message = new StringBuilder();
    message.Append("<HTML><BODY>");
    message.Append("<p> Error message 403: Access is denied due to a missing or invalid client certificate.</p>");
    message.Append("</BODY></HTML>");
    message403 = message.ToString();

    // Turn the error message into a byte array using the 
    // encoding from the response when present.
    System.Text.Encoding encoding = response.ContentEncoding;
    if (encoding == null)
    {
        encoding = System.Text.Encoding.UTF8;
        response.ContentEncoding = encoding;
    }

    byte[] buffer = encoding.GetBytes(message403);
    response.ContentLength64 = buffer.Length;
    // Write the error message.
    System.IO.Stream stream = response.OutputStream;
    stream.Write(buffer, 0, buffer.Length);
    // Send the response.
    response.Close();
}
Private Shared message403 As String
Private Shared preMade403Response As HttpListenerResponse
Private Shared Sub SendBadCertificateResponse(ByVal response As HttpListenerResponse)
    
    If preMade403Response Is Nothing Then
        ' Set up an authentication error response template.
        response.StatusCode = Cint(HttpStatusCode.Forbidden)
        response.StatusDescription = "403 Forbidden"
        response.ProtocolVersion = New Version("1.1")
        response.SendChunked = False
    Else
        response.CopyFrom(preMade403Response) 
    End If
    
    ' The response body cannot be saved in the template.
    Dim message As New StringBuilder()
    message.Append("<HTML><BODY>")
    message.Append("<p> Error message 403: Access is denied due to a missing or invalid client certificate.</p>")
    message.Append("</BODY></HTML>")
    message403 = message.ToString()

    ' Turn the error message into a byte array using the 
    ' encoding from the response when present.
    Dim encoding As System.Text.Encoding = response.ContentEncoding
    If encoding Is Nothing Then
        encoding = System.Text.Encoding.UTF8
        response.ContentEncoding = encoding
    End If

    Dim buffer() As Byte = encoding.GetBytes(message403)
    response.ContentLength64 = buffer.Length
    ' Write the error message.
    Dim stream As System.IO.Stream = response.OutputStream
    stream.Write(buffer, 0, buffer.Length)
    ' Send the response.
    response.Close()
End Sub

Commenti

Questo metodo chiude il flusso di risposta e il HttpListenerRequest associato alla risposta.This method closes the response stream and the HttpListenerRequest associated with the response.

Vedi anche

Close(Byte[], Boolean)

Invia la matrice di byte specificata al client e rilascia le risorse contenute nell'istanza di HttpListenerResponse.Returns the specified byte array to the client and releases the resources held by this HttpListenerResponse instance.

public:
 void Close(cli::array <System::Byte> ^ responseEntity, bool willBlock);
public void Close (byte[] responseEntity, bool willBlock);
member this.Close : byte[] * bool -> unit
Public Sub Close (responseEntity As Byte(), willBlock As Boolean)

Parametri

responseEntity
Byte[]

Matrice Byte che contiene la risposta da inviare al client.A Byte array that contains the response to send to the client.

willBlock
Boolean

true per bloccare l'esecuzione durante la cancellazione del flusso verso il client; in caso contrariofalse.true to block execution while flushing the stream to the client; otherwise, false.

Eccezioni

responseEntity è null.responseEntity is null.

Questo oggetto è chiuso.This object is closed.

Esempi

Nell'esempio di codice riportato di seguito viene illustrata la chiamata a questo metodo.The following code example demonstrates calling this method.

// This example requires the System and System.Net namespaces.
public static void SimpleListenerExample2(string[] prefixes)
{
    // URI prefixes are required,
    // for example "http://contoso.com:8080/index/".
    if (prefixes == null || prefixes.Length == 0)
      throw new ArgumentException("prefixes");
    
    // Create a listener.
    HttpListener listener = new HttpListener();
    // Add the prefixes.
    foreach (string s in prefixes)
    {
        listener.Prefixes.Add(s);
    }
    listener.Start();
    Console.WriteLine("Listening...");
    // Note: The GetContext method blocks while waiting for a request. 
    HttpListenerContext context = listener.GetContext();
    HttpListenerRequest request = context.Request;
    // Obtain a response object.
    HttpListenerResponse response = context.Response;
    // Construct a response.
    string responseString = "<HTML><BODY> Hello world!</BODY></HTML>";
    byte[] buffer = System.Text.Encoding.UTF8.GetBytes(responseString);
    // Get a response stream and write the response to it.
    response.ContentLength64 = buffer.Length;
    // Demonstrate using the close overload that takes an 
    // entity body.
    // Specify true to block while data is transmitted.
    response.Close(buffer, true);
    listener.Stop();
}
Public Shared Sub SimpleListenerExample2(ByVal prefixes As String())
    ' URI prefixes are required,
    ' for example "http://contoso.com:8080/index/".
    If prefixes Is Nothing Or prefixes.Length = 0 Then
        Throw New ArgumentException("prefixes")
    End If

    ' Create a listener
    Dim listener As HttpListener = New HttpListener()
    ' Add the prefixes
    For Each s As String In prefixes
        listener.Prefixes.Add(s)
    Next

    listener.Start()
    Console.WriteLine("Listening...")
    ' Note: The GetContext method blocks while waiting for a request. 
    Dim context As HttpListenerContext = listener.GetContext()
    Dim request As HttpListenerRequest = context.Request
    ' Obtain a response object.
    Dim response As HttpListenerResponse = context.Response
    ' Construct a response
    Dim responseString As String = "<HTML><BODY> Hello world!</BODY></HTML>"
    Dim buffer As Byte() = System.Text.Encoding.UTF8.GetBytes(responseString)
    ' Get a response stream and write the response to it.
    response.ContentLength64 = buffer.Length
    ' Demonstrate using the close overload that takes an 
    ' entity body.
    ' Specify true to block while data Is transmitted.
    response.Close(buffer, True)
    listener.Stop()
End Sub

Commenti

Se si inviano dati del corpo con la risposta, è possibile usare questo metodo per inviarli come matrice di Byte anziché scrivere i dati del corpo nella proprietà OutputStream e chiamare il metodo Close.If you are sending body data with the response, you can use this method to send it as a Byte array instead of writing the body data to the OutputStream property and calling the Close method.

Questo metodo chiude il flusso di risposta e il HttpListenerRequest associato alla risposta.This method closes the response stream and the HttpListenerRequest associated with the response.

Vedi anche

Si applica a