1package eu.siacs.conversations.utils;
2
3import android.net.Uri;
4import android.util.Log;
5
6import java.io.UnsupportedEncodingException;
7import java.net.URLDecoder;
8import java.util.ArrayList;
9import java.util.List;
10import java.util.Locale;
11
12import eu.siacs.conversations.Config;
13import rocks.xmpp.addr.Jid;
14
15public class XmppUri {
16
17 protected Uri uri;
18 protected String jid;
19 private List<Fingerprint> fingerprints = new ArrayList<>();
20 private String body;
21 private String name;
22 private String action;
23 private boolean safeSource = true;
24
25 private static final String OMEMO_URI_PARAM = "omemo-sid-";
26
27 public static final String ACTION_JOIN = "join";
28 public static final String ACTION_MESSAGE = "message";
29
30 public XmppUri(String uri) {
31 try {
32 parse(Uri.parse(uri));
33 } catch (IllegalArgumentException e) {
34 try {
35 jid = Jid.of(uri).asBareJid().toString();
36 } catch (IllegalArgumentException e2) {
37 jid = null;
38 }
39 }
40 }
41
42 public XmppUri(Uri uri) {
43 parse(uri);
44 }
45
46 public XmppUri(Uri uri, boolean safeSource) {
47 this.safeSource = safeSource;
48 parse(uri);
49 }
50
51 public boolean isSafeSource() {
52 return safeSource;
53 }
54
55 protected void parse(final Uri uri) {
56 if (uri == null) {
57 return;
58 }
59 this.uri = uri;
60 String scheme = uri.getScheme();
61 String host = uri.getHost();
62 List<String> segments = uri.getPathSegments();
63 if ("https".equalsIgnoreCase(scheme) && "conversations.im".equalsIgnoreCase(host)) {
64 if (segments.size() >= 2 && segments.get(1).contains("@")) {
65 // sample : https://conversations.im/i/foo@bar.com
66 try {
67 jid = Jid.of(lameUrlDecode(segments.get(1))).toString();
68 } catch (Exception e) {
69 Log.d(Config.LOGTAG, "parsing failed ", e);
70 jid = null;
71 }
72 } else if (segments.size() >= 3) {
73 // sample : https://conversations.im/i/foo/bar.com
74 jid = segments.get(1) + "@" + segments.get(2);
75 }
76 if (segments.size() > 1 && "j".equalsIgnoreCase(segments.get(0))) {
77 action = ACTION_JOIN;
78 }
79 fingerprints = parseFingerprints(uri.getQuery(), '&');
80 } else if ("xmpp".equalsIgnoreCase(scheme)) {
81 // sample: xmpp:foo@bar.com
82
83 final String query = uri.getQuery();
84
85 if (hasAction(query, ACTION_JOIN)) {
86 this.action = ACTION_JOIN;
87 } else if (hasAction(query, ACTION_MESSAGE)) {
88 this.action = ACTION_MESSAGE;
89 }
90
91 if (uri.getAuthority() != null) {
92 jid = uri.getAuthority();
93 } else {
94 String[] parts = uri.getSchemeSpecificPart().split("\\?");
95 if (parts.length > 0) {
96 jid = parts[0];
97 } else {
98 return;
99 }
100 }
101 this.fingerprints = parseFingerprints(uri.getQuery());
102 this.body = parseParameter("body", uri.getQuery());
103 this.name = parseParameter("name", uri.getQuery());
104 } else if ("imto".equalsIgnoreCase(scheme)) {
105 // sample: imto://xmpp/foo@bar.com
106 try {
107 jid = URLDecoder.decode(uri.getEncodedPath(), "UTF-8").split("/")[1].trim();
108 } catch (final UnsupportedEncodingException ignored) {
109 jid = null;
110 }
111 } else {
112 try {
113 jid = Jid.of(uri.toString()).asBareJid().toString();
114 } catch (final IllegalArgumentException ignored) {
115 jid = null;
116 }
117 }
118 }
119
120 public String toString() {
121 if (uri != null) {
122 return uri.toString();
123 }
124 return "";
125 }
126
127 private List<Fingerprint> parseFingerprints(String query) {
128 return parseFingerprints(query, ';');
129 }
130
131 private List<Fingerprint> parseFingerprints(String query, char seperator) {
132 List<Fingerprint> fingerprints = new ArrayList<>();
133 String[] pairs = query == null ? new String[0] : query.split(String.valueOf(seperator));
134 for (String pair : pairs) {
135 String[] parts = pair.split("=", 2);
136 if (parts.length == 2) {
137 String key = parts[0].toLowerCase(Locale.US);
138 String value = parts[1].toLowerCase(Locale.US);
139 if (key.startsWith(OMEMO_URI_PARAM)) {
140 try {
141 int id = Integer.parseInt(key.substring(OMEMO_URI_PARAM.length()));
142 fingerprints.add(new Fingerprint(FingerprintType.OMEMO, value, id));
143 } catch (Exception e) {
144 //ignoring invalid device id
145 }
146 }
147 }
148 }
149 return fingerprints;
150 }
151
152 private String parseParameter(String key, String query) {
153 for (String pair : query == null ? new String[0] : query.split(";")) {
154 final String[] parts = pair.split("=", 2);
155 if (parts.length == 2 && key.equals(parts[0].toLowerCase(Locale.US))) {
156 try {
157 return URLDecoder.decode(parts[1], "UTF-8");
158 } catch (UnsupportedEncodingException e) {
159 return null;
160 }
161 }
162 }
163 return null;
164 }
165
166 private boolean hasAction(String query, String action) {
167 for (String pair : query == null ? new String[0] : query.split(";")) {
168 final String[] parts = pair.split("=", 2);
169 if (parts.length == 1 && parts[0].toLowerCase(Locale.US).startsWith(action)) {
170 return true;
171 }
172 }
173 return false;
174 }
175
176 public boolean isAction(final String action) {
177 return this.action != null && this.action.equals(action);
178
179 }
180
181 public Jid getJid() {
182 try {
183 return this.jid == null ? null : Jid.of(this.jid);
184 } catch (IllegalArgumentException e) {
185 return null;
186 }
187 }
188
189 public boolean isJidValid() {
190 if (jid == null) {
191 return false;
192 }
193 try {
194 Jid.of(jid);
195 return true;
196 } catch (IllegalArgumentException e) {
197 return false;
198 }
199 }
200
201 public String getBody() {
202 return body;
203 }
204
205 public String getName() {
206 return name;
207 }
208
209 public List<Fingerprint> getFingerprints() {
210 return this.fingerprints;
211 }
212
213 public boolean hasFingerprints() {
214 return fingerprints.size() > 0;
215 }
216
217 public enum FingerprintType {
218 OMEMO
219 }
220
221 public static String getFingerprintUri(String base, List<XmppUri.Fingerprint> fingerprints, char seperator) {
222 StringBuilder builder = new StringBuilder(base);
223 builder.append('?');
224 for (int i = 0; i < fingerprints.size(); ++i) {
225 XmppUri.FingerprintType type = fingerprints.get(i).type;
226 if (type == XmppUri.FingerprintType.OMEMO) {
227 builder.append(XmppUri.OMEMO_URI_PARAM);
228 builder.append(fingerprints.get(i).deviceId);
229 }
230 builder.append('=');
231 builder.append(fingerprints.get(i).fingerprint);
232 if (i != fingerprints.size() - 1) {
233 builder.append(seperator);
234 }
235 }
236 return builder.toString();
237 }
238
239 public static class Fingerprint {
240 public final FingerprintType type;
241 public final String fingerprint;
242 final int deviceId;
243
244 public Fingerprint(FingerprintType type, String fingerprint, int deviceId) {
245 this.type = type;
246 this.fingerprint = fingerprint;
247 this.deviceId = deviceId;
248 }
249
250 @Override
251 public String toString() {
252 return type.toString() + ": " + fingerprint + (deviceId != 0 ? " " + String.valueOf(deviceId) : "");
253 }
254 }
255
256 private static String lameUrlDecode(String url) {
257 return url.replace("%23", "#").replace("%25", "%");
258 }
259
260 public static String lameUrlEncode(String url) {
261 return url.replace("%", "%25").replace("#", "%23");
262 }
263}