asp.net ean 13

asp.net ean 13

asp.net ean 13

asp.net ean 13

asp.net ean 13

asp.net ean 13,

asp.net ean 13,

asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,

asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,

asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,
asp.net ean 13,

Using the interface javax.microedition.io.HttpConnection is probably the easiest way to use the MIDP API to communicate with a server. Listing 6-1 is a code segment that will create an instance of HttpConnection and use it to send a message to a server and read a response. Listing 6-1. Creating an Instance of HttpConnection /** * Makes a connection to the server and reads the data. */ public void run() { // you sync on the class because you don't want multiple // instances simultaneously attempting to download ContentConnection connection = null; DataInputStream dis = null; DataOutputStream dos = null; byte dataToSend = 3; try { // the method Connector.open() uses the URL argument // to decide what protocol to use (and hence what type // of Connection interface to return) in addition to // using the URL to determine the address of the // program to contact. connection = (ContentConnection)Connector.open( "http://frog-parrot.net:8080/servlet/ExampleServlet"); ((HttpConnection)connection).setRequestMethod(HttpConnection.POST); dos = connection.openDataOutputStream(); dos.write(dataToSend); // flush sends the message dos.flush(); // some implementations give errors if you open the data input stream // without first reading the response code: int responseCode = ((HttpConnection)connection).getResponseCode(); dis = connection.openDataInputStream(); byte received = dis.readByte(); } catch(Exception e) { // normally you would add some code here to send // the user an error message.

The last section claimed data services to be a Java web application. You will see that claim reinforced by deploying a data service like any other Java web application in a Java application server (with a servlet container). Once we have deployed it successfully, we will go ahead and configure it so that we are ready to build an example application.

object is very versatile because it does not have other type dependencies and does not manipulate other classes; thus the UserIdentification implementation would be similar for all IUserIdentificationResolver<> implementations The interface IUserIdentificationResolver<> is used to extract the user identifiers For HTTP authentication, the implementation is illustrated as follows: public class HttpAuthenticationResolver : IUserIdentificationResolver<HttpRequest> { IUserIdentificationFactory _factory; public HttpAuthenticationResolver(IUserIdentificationFactory factory) { _factory = factory; } public IUserIdentification Resolve(HttpRequest app) { if (requestHeaders["Authorization"] != null) { string identifier = ""; // Do some operations to find out who it is return _factoryCreate(identifier); } else { return _factoryCreate(); } } } The class HttpAuthenticationResolver implements the interface IUserIdentificationResolver<>, and for the Generics parameter defines the type HttpRequest What this declaration is saying is that the resolver will extract the user identification information from the type HttpRequest In ASPNET, HttpRequest contains all the information that is sent by the request.

For the purposes of illustration, we will pick BlazeDS as the data service and choose JBoss Application Server (AS) as the Java application server. If the data service is LCDS and the application server is any other, such as Apache Tomcat, BEA WebLogic, IBM WebSphere, Apache Geronimo, Caucho Resin, or GlassFish, the situation is not very different. Each of these application servers has its own directory structure and styles of deployment. Deploying BlazeDS or LCDS involves the same level of complexity as deploying any other Java web application packaged as a WAR. Adobe Labs has published some notes on the specific installation instructions for a few of the popular application servers. These notes are online at http://opensource.adobe.com/wiki/display/blazeds/BlazeDS+3+Release+Notes. The first step is to get all the required software and to install it.

} finally { // even if there is a communications error, you need // to close the connection and the streams: try { if(dis != null) { disclose(); } if(dos != null) { dosclose(); } if(connection != null) { connectionclose(); } } catch(Exception e) { // normally you would add some code here to send // the user an error message } } } Several points in Listing 6-1 require some further explanation First, it wasn t an accident that I called the method run() as if the previous code were from a subclass of Thread Since reading from a socket may cause the current thread to block, it s a good idea to spawn a new thread for communications rather than using the main thread This is good practice for essentially all Java networking code it should be running on a dedicated thread.