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1 | package be.nikiroo.utils.serial.server; |
2 | ||
3 | import java.io.IOException; | |
4 | import java.net.Socket; | |
f4053377 | 5 | import java.net.UnknownHostException; |
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6 | |
7 | import be.nikiroo.utils.Version; | |
8 | ||
9 | /** | |
10 | * This class implements a simple server that can listen for connections and | |
11 | * send/receive Strings. | |
12 | * <p> | |
13 | * Note: this {@link ServerString} has to be discarded after use (cannot be | |
14 | * started twice). | |
15 | * | |
16 | * @author niki | |
17 | */ | |
18 | abstract public class ServerString extends Server { | |
19 | /** | |
20 | * Create a new server that will start listening on the network when | |
21 | * {@link ServerString#start()} is called. | |
22 | * | |
23 | * @param port | |
24 | * the port to listen on, or 0 to assign any unallocated port | |
25 | * found (which can later on be queried via | |
26 | * {@link ServerString#getPort()} | |
27 | * @param ssl | |
28 | * use a SSL connection (or not) | |
29 | * | |
30 | * @throws IOException | |
31 | * in case of I/O error | |
f4053377 NR |
32 | * @throws UnknownHostException |
33 | * if the IP address of the host could not be determined | |
34 | * @throws IllegalArgumentException | |
35 | * if the port parameter is outside the specified range of valid | |
36 | * port values, which is between 0 and 65535, inclusive | |
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37 | */ |
38 | public ServerString(int port, boolean ssl) throws IOException { | |
39 | super(port, ssl); | |
40 | } | |
41 | ||
42 | /** | |
43 | * Create a new server that will start listening on the network when | |
44 | * {@link ServerString#start()} is called. | |
45 | * | |
46 | * @param name | |
47 | * the server name (only used for debug info and traces) | |
48 | * @param port | |
49 | * the port to listen on | |
50 | * @param ssl | |
51 | * use a SSL connection (or not) | |
52 | * | |
53 | * @throws IOException | |
54 | * in case of I/O error | |
f4053377 NR |
55 | * @throws UnknownHostException |
56 | * if the IP address of the host could not be determined | |
57 | * @throws IllegalArgumentException | |
58 | * if the port parameter is outside the specified range of valid | |
59 | * port values, which is between 0 and 65535, inclusive | |
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60 | */ |
61 | public ServerString(String name, int port, boolean ssl) throws IOException { | |
62 | super(name, port, ssl); | |
63 | } | |
64 | ||
65 | @Override | |
66 | protected ConnectActionServer createConnectActionServer(Socket s) { | |
67 | return new ConnectActionServerString(s) { | |
68 | @Override | |
69 | public void action(Version clientVersion) throws Exception { | |
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70 | for (String data = rec(); data != null; data = rec()) { |
71 | String rep = null; | |
72 | try { | |
73 | rep = onRequest(this, clientVersion, data); | |
74 | } catch (Exception e) { | |
75 | onError(e); | |
76 | } | |
79ce1a49 | 77 | |
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78 | if (rep == null) { |
79 | rep = ""; | |
79ce1a49 | 80 | } |
79ce1a49 | 81 | |
8537d55a | 82 | send(rep); |
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83 | } |
84 | } | |
0ff71477 NR |
85 | |
86 | @Override | |
87 | protected void onError(Exception e) { | |
d827da2a | 88 | ServerString.this.onError(e); |
0ff71477 | 89 | } |
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90 | }; |
91 | } | |
92 | ||
93 | /** | |
94 | * This is the method that is called on each client request. | |
95 | * <p> | |
96 | * You are expected to react to it and return an answer (NULL will be | |
97 | * converted to an empty {@link String}). | |
98 | * | |
99 | * @param action | |
100 | * the client action | |
101 | * @param clientVersion | |
102 | * the client version | |
103 | * @param data | |
104 | * the data sent by the client | |
105 | * | |
106 | * @return the answer to return to the client | |
107 | * | |
108 | * @throws Exception | |
109 | * in case of an exception, the error will only be logged | |
110 | */ | |
111 | abstract protected String onRequest(ConnectActionServerString action, | |
112 | Version clientVersion, String data) throws Exception; | |
113 | } |