HttpWebRequest.Credentials Properti

  • Referensi

Definisi

Ruang nama:
System.Net
Rakitan:
System.Net.Requests.dll
Rakitan:
System.dll
Rakitan:
netstandard.dll
Sumber:
HttpWebRequest.cs
Sumber:
HttpWebRequest.cs
Sumber:
HttpWebRequest.cs

Mendapatkan atau mengatur informasi autentikasi untuk permintaan tersebut.

public:
 virtual property System::Net::ICredentials ^ Credentials { System::Net::ICredentials ^ get(); void set(System::Net::ICredentials ^ value); };
public override System.Net.ICredentials Credentials { get; set; }
public override System.Net.ICredentials? Credentials { get; set; }
member this.Credentials : System.Net.ICredentials with get, set
Public Overrides Property Credentials As ICredentials

Nilai Properti

ICredentials

Yang ICredentials berisi kredensial autentikasi yang terkait dengan permintaan. Default adalah null.

Contoh

Contoh kode berikut mengatur kredensial untuk permintaan.

#using <System.dll>

using namespace System;
using namespace System::Net;
using namespace System::Text;
using namespace System::IO;

// Specify the URL to receive the request.
int main()
{
   array<String^>^args = Environment::GetCommandLineArgs();
   HttpWebRequest^ request = dynamic_cast<HttpWebRequest^>(WebRequest::Create(args[1]));

   // Set some reasonable limits on resources used by this request
   request->MaximumAutomaticRedirections = 4;
   request->MaximumResponseHeadersLength = 4;

   // Set credentials to use for this request.
   request->Credentials = CredentialCache::DefaultCredentials;
   HttpWebResponse^ response = dynamic_cast<HttpWebResponse^>(request->GetResponse());
   Console::WriteLine("Content length is {0}", response->ContentLength);
   Console::WriteLine("Content type is {0}", response->ContentType);

   // Get the stream associated with the response.
   Stream^ receiveStream = response->GetResponseStream();

   // Pipes the stream to a higher level stream reader with the required encoding format.
   StreamReader^ readStream = gcnew StreamReader(receiveStream, Encoding::UTF8);
   Console::WriteLine("Response stream received.");
   Console::WriteLine(readStream->ReadToEnd());
   response->Close();
   readStream->Close();
}

/*
The output from this example will vary depending on the value passed into Main
but will be similar to the following:

Content length is 1542
Content type is text/html; charset=utf-8
Response stream received.
<html>
...
</html>

*/

using System;
using System.Net;
using System.Text;
using System.IO;

    public class Test
    {
        // Specify the URL to receive the request.
        public static void Main (string[] args)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(args[0]);

            // Set some reasonable limits on resources used by this request
            request.MaximumAutomaticRedirections = 4;
            request.MaximumResponseHeadersLength = 4;
            // Set credentials to use for this request.
            request.Credentials = CredentialCache.DefaultCredentials;
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            Console.WriteLine("Content length is {0}", response.ContentLength);
            Console.WriteLine("Content type is {0}", response.ContentType);

            // Get the stream associated with the response.
            Stream receiveStream = response.GetResponseStream();

            // Pipes the stream to a higher level stream reader with the required encoding format.
            StreamReader readStream = new StreamReader(receiveStream, Encoding.UTF8);

            Console.WriteLine("Response stream received.");
            Console.WriteLine(readStream.ReadToEnd());
            response.Close();
            readStream.Close();
        }
    }

/*
The output from this example will vary depending on the value passed into Main
but will be similar to the following:

Content length is 1542
Content type is text/html; charset=utf-8
Response stream received.
<html>
...
</html>

*/

Imports System.Net
Imports System.Text
Imports System.IO


    Public Class Test

        ' Specify the URL to receive the request.
        Public Shared Sub Main(ByVal args() As String)
        Dim request As HttpWebRequest = CType(WebRequest.Create(args(0)), HttpWebRequest)


        ' Set some reasonable limits on resources used by this request
        request.MaximumAutomaticRedirections = 4
        request.MaximumResponseHeadersLength = 4

        ' Set credentials to use for this request.
        request.Credentials = CredentialCache.DefaultCredentials

        Dim response As HttpWebResponse = CType(request.GetResponse(), HttpWebResponse)

        Console.WriteLine("Content length is {0}", response.ContentLength)
        Console.WriteLine("Content type is {0}", response.ContentType)

        ' Get the stream associated with the response.
        Dim receiveStream As Stream = response.GetResponseStream()

        ' Pipes the stream to a higher level stream reader with the required encoding format. 
        Dim readStream As New StreamReader(receiveStream, Encoding.UTF8)

        Console.WriteLine("Response stream received.")
        Console.WriteLine(readStream.ReadToEnd())
        response.Close()
        readStream.Close()
    End Sub
End Class
'
'The output from this example will vary depending on the value passed into Main 
'but will be similar to the following:
'
'Content length is 1542
'Content type is text/html; charset=utf-8
'Response stream received.
'...
'
'

Keterangan

Properti Credentials berisi informasi autentikasi untuk mengidentifikasi pembuat permintaan. Properti Credentials dapat berupa NetworkCredential, dalam hal ini informasi pengguna, kata sandi, dan domain yang terkandung dalam NetworkCredential objek digunakan untuk mengautentikasi permintaan, atau dapat berupa CredentialCache, dalam hal ini Pengidentifikasi Sumber Daya Seragam (URI) permintaan digunakan untuk menentukan informasi pengguna, kata sandi, dan domain yang digunakan untuk mengautentikasi permintaan.

Dalam sebagian besar skenario klien, Anda harus menggunakan DefaultCredentials properti , yang berisi kredensial pengguna yang saat ini masuk. Untuk melakukan ini, atur properti ke UseDefaultCredentialstrue alih-alih mengatur properti ini.

HttpWebRequest Jika kelas sedang digunakan dalam aplikasi tingkat menengah, seperti aplikasi ASP.NET, kredensial di DefaultCredentials properti milik akun yang menjalankan halaman ASP (kredensial sisi server). Biasanya, Anda akan mengatur properti ini ke kredensial klien atas nama yang permintaannya dibuat.

Catatan

Skema autentikasi NTLM tidak dapat digunakan untuk meniru pengguna lain. Kerberos harus dikonfigurasi secara khusus untuk mendukung peniruan.

Untuk membatasi HttpWebRequest ke satu atau beberapa metode autentikasi, gunakan CredentialCache kelas dan ikat kredensial Anda ke satu atau beberapa skema autentikasi

Skema autentikasi yang didukung termasuk Digest, Negosiasi, Kerberos, NTLM, dan Basic.

Untuk alasan keamanan, saat mengikuti pengalihan secara otomatis, simpan kredensial yang ingin Anda sertakan dalam pengalihan dalam CredentialCache dan tetapkan ke properti ini. Properti ini akan secara otomatis diatur ke null setelah pengalihan jika berisi apa pun kecuali CredentialCache. Memiliki nilai properti ini secara otomatis diatur ke null dalam kondisi tersebut mencegah kredensial dikirim ke tujuan yang tidak diinginkan.

Berlaku untuk