HttpWebRequest.Connection 속성
정의
중요
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HTTP Connection
헤더의 값을 가져오거나 설정합니다.
public:
property System::String ^ Connection { System::String ^ get(); void set(System::String ^ value); };
public string? Connection { get; set; }
public string Connection { get; set; }
member this.Connection : string with get, set
Public Property Connection As String
속성 값
HTTP Connection
헤더의 값입니다. 기본값은 null
입니다.
예외
Connection의 값이 Keep-alive 또는 Close로 설정되어 있습니다.
예제
다음 코드 예제에서는 속성을 사용 하 여 Connection 연결 HTTP 헤더의 값을 설정 합니다.
int main()
{
try
{
// Create a new HttpWebRequest object. Make sure that
// a default proxy is set if you are behind a firewall.
HttpWebRequest^ myHttpWebRequest1 = dynamic_cast<HttpWebRequest^>(WebRequest::Create( "http://www.contoso.com" ));
myHttpWebRequest1->KeepAlive = false;
// Assign the response object of HttpWebRequest to a HttpWebResponse variable.
HttpWebResponse^ myHttpWebResponse1 = dynamic_cast<HttpWebResponse^>(myHttpWebRequest1->GetResponse());
Console::WriteLine( "\nThe HTTP request Headers for the first request are: \n {0}", myHttpWebRequest1->Headers );
Console::WriteLine( "Press Enter Key to Continue.........." );
Console::Read();
Stream^ streamResponse = myHttpWebResponse1->GetResponseStream();
StreamReader^ streamRead = gcnew StreamReader( streamResponse );
array<Char>^readBuff = gcnew array<Char>(256);
int count = streamRead->Read( readBuff, 0, 256 );
Console::WriteLine( "The contents of the Html page are.......\n" );
while ( count > 0 )
{
String^ outputData = gcnew String( readBuff,0,count );
Console::Write( outputData );
count = streamRead->Read( readBuff, 0, 256 );
}
Console::WriteLine();
// Close the Stream object.
streamResponse->Close();
streamRead->Close();
// Release the resources held by response object.
myHttpWebResponse1->Close();
// Create a new HttpWebRequest object for the specified Uri.
HttpWebRequest^ myHttpWebRequest2 = dynamic_cast<HttpWebRequest^>(WebRequest::Create( "http://www.contoso.com" ));
myHttpWebRequest2->Connection = "Close";
// Assign the response object of 'HttpWebRequest' to a 'HttpWebResponse' variable.
HttpWebResponse^ myHttpWebResponse2 = dynamic_cast<HttpWebResponse^>(myHttpWebRequest2->GetResponse());
// Release the resources held by response object.
myHttpWebResponse2->Close();
Console::WriteLine( "\nThe Http RequestHeaders are \n {0}", myHttpWebRequest2->Headers );
Console::WriteLine( "\nPress 'Enter' Key to Continue........." );
Console::Read();
}
catch ( ArgumentException^ e )
{
Console::WriteLine( "\nThe second HttpWebRequest Object* has raised an Argument Exception as 'Connection' Property is set to 'Close'" );
Console::WriteLine( "\n {0}", e->Message );
}
catch ( WebException^ e )
{
Console::WriteLine( "WebException raised!" );
Console::WriteLine( "\n {0}", e->Message );
Console::WriteLine( "\n {0}", e->Status );
}
catch ( Exception^ e )
{
Console::WriteLine( "Exception raised!" );
Console::WriteLine( "Source : {0} ", e->Source );
Console::WriteLine( "Message : {0} ", e->Message );
}
}
class HttpWebRequest_Connection
{
static void Main()
{
try
{
// Create a new HttpWebRequest object.Make sure that
// a default proxy is set if you are behind a firewall.
HttpWebRequest myHttpWebRequest1 =
(HttpWebRequest)WebRequest.Create("http://www.contoso.com");
myHttpWebRequest1.KeepAlive=false;
// Assign the response object of HttpWebRequest to a HttpWebResponse variable.
HttpWebResponse myHttpWebResponse1 =
(HttpWebResponse)myHttpWebRequest1.GetResponse();
Console.WriteLine("\nThe HTTP request Headers for the first request are: \n{0}",myHttpWebRequest1.Headers);
Console.WriteLine("Press Enter Key to Continue..........");
Console.Read();
Stream streamResponse=myHttpWebResponse1.GetResponseStream();
StreamReader streamRead = new StreamReader( streamResponse );
Char[] readBuff = new Char[256];
int count = streamRead.Read( readBuff, 0, 256 );
Console.WriteLine("The contents of the Html page are.......\n");
while (count > 0)
{
String outputData = new String(readBuff, 0, count);
Console.Write(outputData);
count = streamRead.Read(readBuff, 0, 256);
}
Console.WriteLine();
// Close the Stream object.
streamResponse.Close();
streamRead.Close();
// Release the resources held by response object.
myHttpWebResponse1.Close();
// Create a new HttpWebRequest object for the specified Uri.
HttpWebRequest myHttpWebRequest2 =
(HttpWebRequest)WebRequest.Create("http://www.contoso.com");
myHttpWebRequest2.Connection="Close";
// Assign the response object of 'HttpWebRequest' to a 'HttpWebResponse' variable.
HttpWebResponse myHttpWebResponse2 =
(HttpWebResponse)myHttpWebRequest2.GetResponse();
// Release the resources held by response object.
myHttpWebResponse2.Close();
Console.WriteLine("\nThe Http RequestHeaders are \n{0}",myHttpWebRequest2.Headers);
Console.WriteLine("\nPress 'Enter' Key to Continue.........");
Console.Read();
}
catch(ArgumentException e)
{
Console.WriteLine("\nThe second HttpWebRequest object has raised an Argument Exception as 'Connection' Property is set to 'Close'");
Console.WriteLine("\n{0}",e.Message);
}
catch(WebException e)
{
Console.WriteLine("WebException raised!");
Console.WriteLine("\n{0}",e.Message);
Console.WriteLine("\n{0}",e.Status);
}
catch(Exception e)
{
Console.WriteLine("Exception raised!");
Console.WriteLine("Source :{0} " , e.Source);
Console.WriteLine("Message :{0} " , e.Message);
}
}
}
Class HttpWebRequest_Connection
Shared Sub Main()
Try
' Create a new 'HttpWebRequest' object for the specified Uri. Make sure that
' a default proxy is set if you are behind a firewall.
Dim myHttpWebRequest1 As HttpWebRequest = CType(WebRequest.Create("http://www.contoso.com"), HttpWebRequest)
myHttpWebRequest1.KeepAlive = False
' Assign the response object of 'HttpWebRequest' to a 'HttpWebResponse' variable.
Dim myHttpWebResponse1 As HttpWebResponse = CType(myHttpWebRequest1.GetResponse(), HttpWebResponse)
Console.WriteLine(ControlChars.Cr + "The HTTP request Headers for the first request are {0}", myHttpWebRequest1.Headers)
Console.WriteLine("Press Enter Key to Continue..........")
Console.Read()
Dim streamResponse As Stream = myHttpWebResponse1.GetResponseStream()
Dim streamRead As New StreamReader(streamResponse)
Dim readBuff(256) As [Char]
Dim count As Integer = streamRead.Read(readBuff, 0, 256)
Console.WriteLine("The contents of the Html page are......." + ControlChars.Cr)
While count > 0
Dim outputData As New [String](readBuff, 0, count)
Console.Write(outputData)
count = streamRead.Read(readBuff, 0, 256)
End While
' Close the Stream object.
streamResponse.Close()
streamRead.Close()
' Release the resources held by response object.
myHttpWebResponse1.Close()
Console.WriteLine()
' Create a new 'HttpWebRequest' object to the specified Uri.
Dim myHttpWebRequest2 As HttpWebRequest = CType(WebRequest.Create("http://www.contoso.com"), HttpWebRequest)
myHttpWebRequest2.Connection = "Close"
' Assign the response object of 'HttpWebRequest' to a 'HttpWebResponse' variable.
Dim myHttpWebResponse2 As HttpWebResponse = CType(myHttpWebRequest2.GetResponse(), HttpWebResponse)
' Release the resources held by response object.
myHttpWebResponse2.Close()
Console.WriteLine(ControlChars.Cr + "The Http RequestHeaders are " + ControlChars.Cr + "{0}", myHttpWebRequest2.Headers)
Console.WriteLine(ControlChars.Cr + "Press 'Enter' Key to Continue.........")
Console.Read()
Catch e As ArgumentException
Console.WriteLine(ControlChars.Cr + "The second HttpWebRequest object has raised an Argument Exception as 'Connection' Property is set to 'Close'")
Console.WriteLine(ControlChars.Cr + "{0}", e.Message)
Catch e As WebException
Console.WriteLine("WebException raised!")
Console.WriteLine(ControlChars.Cr + "{0}", e.Message)
Console.WriteLine(ControlChars.Cr + "{0}", e.Status)
Catch e As Exception
Console.WriteLine("Exception raised!")
Console.WriteLine("Source :{0} ", e.Source)
Console.WriteLine("Message : {0}", e.Message)
End Try
End Sub
End Class
설명
요청은 HTTP 헤더로 인터넷 리소스에 Connection
속성을 보냅니 Connection 다. 속성 값 KeepAlive 이 true
면 헤더 끝에 Connection
"Keep-alive" 값이 추가됩니다.
HTTP 헤더를 Connection
지우려면 속성을 .로 null
설정합니다Connection.
Changing the Connection property after the request has been started by calling the GetRequestStream, BeginGetRequestStream, GetResponse, or BeginGetResponse method throws an InvalidOperationException.
참고
이 속성의 값은 WebHeaderCollection에 저장됩니다. WebHeaderCollection이 설정되면 속성 값이 손실됩니다.