How to Consume WCF Service with Android

Question

I am creating a server in  NET and a client application for Android  I would like to implement an authentication method which sends username and password to server and a server sends back a session string   I m not familiar with WCF so I would really appreciate your help   In java I ve written the following method   private void Login       HttpClient httpClient   new DefaultHttpClient      try           String url    http   192 168 1 5 8000 Login username test amp password test        HttpGet method   new HttpGet  new URI url         HttpResponse response   httpClient execute method       if   response    null               Log i   login    received     getResponse response getEntity                 else             Log i   login    got a null response               catch  IOException e        Log e   error   e getMessage          catch  URISyntaxException e        Log e   error   e getMessage             private String getResponse  HttpEntity entity       String response          try         int length     int   entity getContentLength        StringBuffer sb   new StringBuffer  length        InputStreamReader isr   new InputStreamReader  entity getContent     UTF-8         char buff     new char length       int cnt      while     cnt   isr read  buff  0  length - 1      gt  0               sb append  buff  0  cnt                 response   sb toString          isr close        catch   IOException ioe         ioe printStackTrace           return response      But on the server side so far I haven t figured out anything   I would be really thankful if anyone could explain how to create an appropriate method string Login string username  string password  with appropriate App config settings and Interface with appropriate  OperationContract  signature in order to read these two parameters from client and reply with session string   Thanks

User · Answer

You will need something more that a http request to interact with a WCF service UNLESS your WCF service has a REST interface. Either look for a SOAP web service API that runs on android or make your service RESTful. You will need .NET 3.5 SP1 to do WCF REST services:

http://msdn.microsoft.com/en-us/netframework/dd547388.aspx

User · Answer

From my recent experience i would recommend ksoap library to consume a Soap WCF Service  its actually really easy  this anddev thread migh help you out too

User · Answer

If I were doing this I would probably use WCF REST on the server and a REST library on the Java Android client

User · Answer

Another option might be to avoid WCF all-together and just use a  NET HttpHandler   The HttpHandler can grab the query-string variables from your GET and just write back a response to the Java code

User · Answer

To get started with WCF  it might be easiest to just use the default SOAP format and HTTP POST  rather than GET  for the web-service bindings   The easiest HTTP binding to get working is  basicHttpBinding    Here is an example of what the ServiceContract OperationContract might look like for your login service    ServiceContract Namespace  http   mycompany com LoginService    public interface ILoginService        OperationContract      string Login string username  string password       The implementation of the service could look like this   public class LoginService   ILoginService       public string Login string username  string password                   Do something with username  password to get create sessionId            string sessionId    12345678           string sessionId   OperationContext Current SessionId           return sessionId            You can host this as a windows service using a ServiceHost  or you can host it in IIS like a normal ASP NET web  service  application   There are a lot of tutorials out there for both of these   The WCF service config might look like this    lt  xml version  1 0  encoding  utf-8    gt   lt configuration gt         lt system serviceModel gt           lt behaviors gt               lt serviceBehaviors gt                   lt behavior name  LoginServiceBehavior  gt                       lt serviceMetadata   gt                   lt  behavior gt               lt  serviceBehaviors gt           lt  behaviors gt            lt services gt               lt service name  WcfTest LoginService                       behaviorConfiguration  LoginServiceBehavior   gt                   lt host gt                       lt baseAddresses gt                           lt add baseAddress  http   somesite com 55555 LoginService     gt                       lt  baseAddresses gt                   lt  host gt                   lt endpoint name  LoginService                            address                              binding  basicHttpBinding                            contract  WcfTest ILoginService    gt                    lt endpoint name  LoginServiceMex                            address  mex                            binding  mexHttpBinding                            contract  IMetadataExchange    gt               lt  service gt           lt  services gt       lt  system serviceModel gt   lt  configuration gt     The MEX stuff is optional for production  but is needed for testing with WcfTestClient exe  and for exposing the service meta-data    You ll have to modify your Java code to POST a SOAP message to the service   WCF can be a little picky when inter-operating with non-WCF clients  so you ll have to mess with the POST headers a little to get it to work   Once you get this running  you can then start to investigate security for the login  might need to use a different binding to get better security   or possibly using WCF REST to allow for logins with a GET rather than SOAP POST   Here is an example of what the HTTP POST should look like from the Java code   There is a tool called  Fiddler  that can be really useful for debugging web-services   POST  LoginService HTTP 1 1 Content-Type  text xml  charset utf-8 SOAPAction   http   mycompany com LoginService ILoginService Login  Host  somesite com 55555 Content-Length  216 Expect  100-continue Connection  Keep-Alive   lt s Envelope xmlns s  http   schemas xmlsoap org soap envelope   gt   lt s Body gt   lt Login xmlns  http   mycompany com LoginService  gt   lt username gt Blah lt  username gt   lt password gt Blah2 lt  password gt   lt  Login gt   lt  s Body gt   lt  s Envelope gt

[.net] How to Consume WCF Service with Android

Examples related to .net

Examples related to android

Examples related to wcf

Examples related to rest