Problème communication applet / servlet (struts)

[probordelais]

Bonjour,

J'essaie de faire communiquer mon applet avec une action struts. Le problème c'est que j'ai l'impression que ma servlet n'est jamais appelée car j'ai mis des logger à l'intérieur et je ne retrouve pas les traces...

Voici le code de mon applet:

Code :

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
private URLConnection getServletConnection()
			throws MalformedURLException, IOException {
 
			// Connection servlet
			URL urlServlet = new URL("http://localhost:8080/HelloDMP-web/creationDMP.action");
			URLConnection con = urlServlet.openConnection();
 
			// configuration
			con.setDoInput(true);
			con.setDoOutput(true);
			con.setUseCaches(false);
 
			return con;
		}
 
	public void onSendData() {
		try {
 
			// send data to the servlet
			URLConnection con = getServletConnection();
			OutputStream outstream = con.getOutputStream();
			ObjectOutputStream oos = new ObjectOutputStream(outstream);
			oos.writeObject(new String("1234"));
			oos.flush();
			oos.close();
 
			// receive result from servlet
			InputStream instr = con.getInputStream();
			ObjectInputStream inputFromServlet = new ObjectInputStream(instr);
			String result = (String) inputFromServlet.readObject();
			inputFromServlet.close();
			instr.close();
 
			// show result
			System.out.println("Result servlet: " + result);
		} catch (Exception ex) {
			ex.printStackTrace();
		}
	}

Celui de ma servlet:

Code :

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
 
public class CreationDMPAction extends ActionSupport {
 
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
 
	private static Logger log = Logger.getLogger(CreationDMPAction.class);	
 
	private static final String ERROR_SESSION = "error_session";
 
	private UserCarteCps userCarteCps;
 
    private ICpsService cpsService;
 
    public ICpsService getCpsService() {
		return cpsService;
	}
	public void setCpsService(ICpsService cpsService) {
		this.cpsService = cpsService;
	}
 
	public UserCarteCps getUserCarteCps() {
		return userCarteCps;
	}
	public void setUserCarteCps(UserCarteCps userCarteCps) {
		this.userCarteCps = userCarteCps;
	}
 
	/*@TypeConversion(converter = "com.enovation.dmp.util.DateConverter")
    @RequiredFieldValidator(message = "Please enter the date")
    public void setDateNow(Date now) { this.now = now; }
    public Date getDateNow() { return now; }
 
    @RequiredStringValidator(message = "Please enter a name", trim = true)
    public void setNom(String name) { this.nom = name; }
    public String getNom() { return this.nom; }
    */
 
	public void doPost(
		HttpServletRequest request,
		HttpServletResponse response)
		throws ServletException, IOException {
		try {
			log.info("****************entree dans la méthode doPost*****************");
			// read a String-object from applet
			// instead of a String-object, you can transmit any object, which
			// is known to the servlet and to the applet
			InputStream in = request.getInputStream();
			ObjectInputStream inputFromApplet = new ObjectInputStream(in);
			String echo = (String) inputFromApplet.readObject();
			log.info("****************Message applet" +echo);
 
			// echo it to the applet
			OutputStream outstr = response.getOutputStream();
			ObjectOutputStream oos = new ObjectOutputStream(outstr);
			oos.writeObject(echo);
			oos.flush();
			oos.close();
 
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
 
	public void doGet(
		HttpServletRequest request,
		HttpServletResponse response)
		throws ServletException, IOException {
		try {
			log.info("****************entree dans la méthode doGet*****************");
			// read a String-object from applet
			// instead of a String-object, you can transmit any object, which
			// is known to the servlet and to the applet
			InputStream in = request.getInputStream();
			ObjectInputStream inputFromApplet = new ObjectInputStream(in);
			String echo = (String) inputFromApplet.readObject();
			log.info("****************Message applet" +echo);
 
			// echo it to the applet
			OutputStream outstr = response.getOutputStream();
			ObjectOutputStream oos = new ObjectOutputStream(outstr);
			oos.writeObject(echo);
			oos.flush();
			oos.close();
 
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
 
	public String execute(HttpServletRequest request,HttpServletResponse response) throws Exception {
		log.info("****************entree dans la méthode execute*****************");
		String retour = SUCCESS;
    	try {
    		/*cpsService.isConnecte();
 
			if (userCarteCps != null && userCarteCps.getIdentifiant() != null) {
				retour = SUCCESS;
			} else {
				addActionError(getText("erreur.login.session"));
	    		retour = ERROR_SESSION;
			}*/
    	} catch (Exception e) {
    		addActionError(getText("erreur.login.session"));
    		retour = ERROR_SESSION;
    	}
        return retour;
    }
}

Et voici le message d'erreur:
java.io.streamcorruptedexception invalid stream header 3C21444F

La ligne concernée est ObjectInputStream inputFromServlet = new ObjectInputStream(instr);

[probordelais]

Pour tester j'ai créé une servlet "classique" avec le même code

Code :

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
public class CommunicationApplet extends HttpServlet {
 
	private static Logger log = Logger.getLogger(CommunicationApplet.class);	
 
	public void doGet(HttpServletRequest req, HttpServletResponse res)
			throws ServletException, IOException {
 
		res.setContentType("text/html");
		PrintWriter out = res.getWriter();
		out.println("<HTML>");
		out.println("<HEAD><TITLE> Titre </TITLE></HEAD>");
		out.println("<BODY>");
		out.println("Ma première servlet");
		out.println("</BODY>");
		out.println("</HTML>");
		out.close();
	}
 
	public void doPost(HttpServletRequest req, HttpServletResponse res)
			throws ServletException, IOException {
 
		try {
			log.info("****************entree dans la méthode doPost*****************");
			// read a String-object from applet
			// instead of a String-object, you can transmit any object, which
			// is known to the servlet and to the applet
			InputStream in = req.getInputStream();
			ObjectInputStream inputFromApplet = new ObjectInputStream(in);
			String echo = (String) inputFromApplet.readObject();
			log.info("****************Message applet" +echo);
 
			// echo it to the applet
			OutputStream outstr = res.getOutputStream();
			ObjectOutputStream oos = new ObjectOutputStream(outstr);
			oos.writeObject(echo);
			oos.flush();
			oos.close();
 
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

Et là ça marche... Pourquoi avec ma classe action struts ça ne marche pas?

[OButterlin]

Peut-être lié au content-type... à tester...

[probordelais]

J'avais essayé mais c'est pareil...

Je pense que c'est dû au fait que ma classe action struts n'extends pas HttpServlet...

[OButterlin]

Je ne pense pas, tout au bout de la chaîne struts il y a une servlet.