Blackberry JAVA DEVELOPMENT ENVIRONMENT - - CRYPTOGRAPHIC SMART CARD DRIVER - DEVELOPMENT GUIDE Průvodce řešením problémů stáhnout pdf (Strana 125)

125

7: Creating connections

keepGoing = false;

}

break;

default:

//The connection failed for some other reason.

//Handle failed connection.

keepGoing = false;

break;

}

//Close the connection.

s.close();

}

catch (IOException e)

{

//Handle the exception.

}

Use HTTPS connections

Use socket connections

Although you can implement HTTP over a socket connection, you should use an HTTP connection for the following

reasons:

• Socket connections do not support the BlackBerry® Mobile Data System™ features, such as push.

Task Steps

Before opening an HTTPS connection,

verify that the BlackBerry® device is

within a wireless coverage area.

>Use the CoverageInfo class and CoverageStatusListener interface of the

net.rim.device.api.system package to make sure that the BlackBerry device is in a

wireless coverage area.

Open an HTTPS connection. 1. Invoke Connector.open(), specifying HTTPS as the protocol.

2. Cast the returned object as an HttpsConnection object.

HttpsConnection stream = (HttpsConnection)Connector.open("https://

host:443/");

Specify the connection mode. > To open an HTTPS connection in end-to-end mode, add one of the following parameters to the

connection string that passes to

Connector.open():

• Specify that an end-to-end HTTPS connection must be used from the BlackBerry device to

the target server:

EndToEndRequired.

• Specify that an end-to-end HTTPS connection should be used from the BlackBerry device

to the target server. If the BlackBerry device does not support end-to-end TLS, and the

BlackBerry device user permits proxy TLS connections, then a proxy connection is used:

EndToEndDesired.

HttpsConnection stream = (HttpsConnection)Connector.open("https://

host:443/;EndToEndDesired");

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