1 /*
2 * Copyright (C) 2013 4th Line GmbH, Switzerland
3 *
4 * The contents of this file are subject to the terms of either the GNU
5 * Lesser General Public License Version 2 or later ("LGPL") or the
6 * Common Development and Distribution License Version 1 or later
7 * ("CDDL") (collectively, the "License"). You may not use this file
8 * except in compliance with the License. See LICENSE.txt for more
9 * information.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14 */
15
16 package org.fourthline.cling.model.message.header;
17
18 import org.fourthline.cling.model.ServerClientTokens;
19
20 /**
21 * @author Christian Bauer
22 */
23 public class ServerHeader extends UpnpHeader<ServerClientTokens> {
24
25 public ServerHeader() {
26 setValue(new ServerClientTokens());
27 }
28
29 public ServerHeader(ServerClientTokens tokens) {
30 setValue(tokens);
31 }
32
33 public void setString(String s) throws InvalidHeaderException {
34 // TODO: This parsing is not as robust as I'd like, probably should use regexs instead
35
36 // UDA 1.1/1.0 section 1.2.2 and RfC 2616, section 14.38
37 // OSNAME/OSVERSION UPnP/1.x PRODUCTNAME/PRODUCTVERSION
38 ServerClientTokens serverClientTokens = new ServerClientTokens();
39
40 // They are all UNKNOWN at this point
41 serverClientTokens.setOsName(ServerClientTokens.UNKNOWN_PLACEHOLDER);
42 serverClientTokens.setOsVersion(ServerClientTokens.UNKNOWN_PLACEHOLDER);
43 serverClientTokens.setProductName(ServerClientTokens.UNKNOWN_PLACEHOLDER);
44 serverClientTokens.setProductVersion(ServerClientTokens.UNKNOWN_PLACEHOLDER);
45
46 // We definitely need a UPnP product token
47 if (s.contains("UPnP/1.1")) {
48 serverClientTokens.setMinorVersion(1);
49 } else if (!s.contains("UPnP/1.")) {
50 throw new InvalidHeaderException("Missing 'UPnP/1.' in server information: " + s);
51 }
52
53 // We might be lucky and the vendor has implemented other tokens correctly. so let's at least try
54 try {
55
56 int numberOfSpaces = 0;
57 for( int i = 0; i < s.length(); i++ ) {
58 if( s.charAt(i) == ' ' ) numberOfSpaces++;
59 }
60
61 String[] osNameVersion;
62 String[] productNameVersion;
63
64 if (s.contains(",")) {
65
66 // Some guys think that the tokens are separated with commas, not whitespace (read section 3.8 of the HTTP spec!)
67 String[] productTokens = s.split(",");
68 osNameVersion = productTokens[0].split("/");
69 productNameVersion = productTokens[2].split("/");
70
71 } else if (numberOfSpaces > 2) {
72
73 // Some guys think that whitespace in token names is OK... it's not ... but let's try...
74 String beforeUpnpToken = s.substring(0, s.indexOf("UPnP/1.")).trim();
75 String afterUpnpToken = s.substring(s.indexOf("UPnP/1.")+8).trim(); // Assumes minor version is 0-9!
76 osNameVersion = beforeUpnpToken.split("/");
77 productNameVersion = afterUpnpToken.split("/");
78
79 } else {
80
81 // Finally, how it is supposed to be, according to UPnP UDA 1.1 (not 1.0 and not HTTP spec!)
82 String[] productTokens = s.split(" ");
83 osNameVersion = productTokens[0].split("/");
84 productNameVersion = productTokens[2].split("/");
85 }
86
87
88 serverClientTokens.setOsName(osNameVersion[0].trim());
89 if (osNameVersion.length > 1) {
90 serverClientTokens.setOsVersion(osNameVersion[1].trim());
91 }
92 serverClientTokens.setProductName(productNameVersion[0].trim());
93 if (productNameVersion.length > 1) {
94 serverClientTokens.setProductVersion(productNameVersion[1].trim());
95 }
96
97 } catch (Exception ex) {
98
99 // If something goes wrong, go back to defaults
100 serverClientTokens.setOsName(ServerClientTokens.UNKNOWN_PLACEHOLDER);
101 serverClientTokens.setOsVersion(ServerClientTokens.UNKNOWN_PLACEHOLDER);
102 serverClientTokens.setProductName(ServerClientTokens.UNKNOWN_PLACEHOLDER);
103 serverClientTokens.setProductVersion(ServerClientTokens.UNKNOWN_PLACEHOLDER);
104
105
106 /* These are the rules:
107
108 Many HTTP/1.1 header field values consist of words separated by LWS or special characters. These special
109 characters MUST be in a quoted string to be used within a parameter value (as defined in section 3.6).
110
111 token = 1*<any CHAR except CTLs or separators>
112 separators = "(" | ")" | "<" | ">" | "@"
113 | "," | ";" | ":" | "\" | <">
114 | "/" | "[" | "]" | "?" | "="
115 | "{" | "}" | SP | HT
116 */
117 }
118
119 setValue(serverClientTokens);
120 }
121
122 public String getString() {
123 return getValue().getHttpToken();
124 }
125 }