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ServicePointManager.FindServicePoint Method (String, IWebProxy)

Finds an existing ServicePoint object or creates a new ServicePoint object to manage communications with the specified Uniform Resource Identifier (URI).

Namespace:  System.Net
Assembly:  System (in System.dll)

public static function FindServicePoint(
	uriString : String, 
	proxy : IWebProxy
) : ServicePoint

Parameters

uriString
Type: System.String

The URI of the Internet resource to be contacted.

proxy
Type: System.Net.IWebProxy

The proxy data for this request.

Return Value

Type: System.Net.ServicePoint
The ServicePoint object that manages communications for the request.

ExceptionCondition
UriFormatException

The URI specified in uriString is invalid.

InvalidOperationException

The maximum number of ServicePoint objects defined in MaxServicePoints has been reached.

The FindServicePoint method returns the ServicePoint object associated with the specified Internet host name. If no ServicePoint object exists for that host, the ServicePointManager object creates one.

The following code example demonstrates calling this method to access a ServicePoint object.

No code example is currently available or this language may not be supported.
int main() 
{
    String* args[] = Environment::GetCommandLineArgs();

    int port = 80;

    // Define a regular expression to parse the user's input.
    // This is a security check. It allows only
    // alphanumeric input strings between 2 to 40 characters long.
    Regex* rex = new Regex(S"^[a-zA-Z]\\w{1,39}$");

    if (args->Length < 2)
    {
        showUsage();
        return -1;
    }

    String* proxy = args[1];
    if ((rex->Match(proxy))->Success != true)
    {
        Console::WriteLine(S"Input string format not allowed.");
        return -1;
    }
    String* proxyAdd = String::Format( S"http://{0}:{1}", proxy, __box(port));
    // Create a proxy object.  
    WebProxy* DefaultProxy = new WebProxy(proxyAdd, true);

    // Set the proxy that all HttpWebRequest instances use.
    GlobalProxySelection::Select = DefaultProxy;   

    // Get the base interface for proxy access for the 
    // WebRequest-based classes.
    IWebProxy* Iproxy = GlobalProxySelection::Select;        

    // Set the maximum number of ServicePoint instances to 
    // maintain. If a ServicePoint instance for that host already 
    // exists when your application requests a connection to
    // an Internet resource, the ServicePointManager object
    // returns this existing ServicePoint instance. If none exists 
    // for that host, it creates a new ServicePoint instance.
    ServicePointManager::MaxServicePoints = 4;

    // Set the maximum idle time of a ServicePoint instance to 10 seconds.
    // After the idle time expires, the ServicePoint object is eligible for
    // garbage collection and cannot be used by the ServicePointManager.
    ServicePointManager::MaxServicePointIdleTime = 1000;


    ServicePointManager::UseNagleAlgorithm = true;
    ServicePointManager::Expect100Continue = true;
    ServicePointManager::CheckCertificateRevocationList = true;
    ServicePointManager::DefaultConnectionLimit = ServicePointManager::DefaultPersistentConnectionLimit;
    // Create the Uri object for the resource you want to access.
    Uri* MS = new Uri(S"http://msdn.microsoft.com/");        

    // Use the FindServicePoint method to find an existing 
    // ServicePoint object or to create a new one.   
    ServicePoint* servicePoint  = ServicePointManager::FindServicePoint(MS, Iproxy);
    ShowProperties(servicePoint); 
    int hashCode = servicePoint->GetHashCode();
    Console::WriteLine(S"Service point hashcode: {0}", __box(hashCode));

    // Make a request with the same scheme identifier and host fragment
    // used to create the previous ServicePoint object.
    makeWebRequest(hashCode, S"http://msdn.microsoft.com/library/");
}

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

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