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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.sync.setup.activities;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class WebURLFinder {
/**
* These regular expressions are taken from Android's Patterns.java.
* We brought them in to standardize URL matching across Android versions, instead of relying
* on Android version-dependent built-ins that can vary across Android versions.
* The original code can be found here:
* http://androidxref.com/6.0.1_r10/xref/frameworks/base/core/java/android/util/Patterns.java
*
*/
public static final String GOOD_IRI_CHAR = "a-zA-Z0-9\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF";
public static final String GOOD_GTLD_CHAR = "a-zA-Z\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF";
public static final String IRI = "[" + GOOD_IRI_CHAR + "]([" + GOOD_IRI_CHAR + "\\-]{0,61}[" + GOOD_IRI_CHAR + "]){0,1}";
public static final String GTLD = "[" + GOOD_GTLD_CHAR + "]{2,63}";
public static final String HOST_NAME = "(" + IRI + "\\.)+" + GTLD;
public static final Pattern IP_ADDRESS = Pattern.compile("((25[0-5]|2[0-4][0-9]|[0-1][0-9]{2}|[1-9][0-9]|[1-9])\\.(25[0-5]|2[0-4]"
+ "[0-9]|[0-1][0-9]{2}|[1-9][0-9]|[1-9]|0)\\.(25[0-5]|2[0-4][0-9]|[0-1]"
+ "[0-9]{2}|[1-9][0-9]|[1-9]|0)\\.(25[0-5]|2[0-4][0-9]|[0-1][0-9]{2}"
+ "|[1-9][0-9]|[0-9]))");
public static final Pattern DOMAIN_NAME = Pattern.compile("(" + HOST_NAME + "|" + IP_ADDRESS + ")");
public static final Pattern WEB_URL = Pattern.compile("((?:(http|https|Http|Https|rtsp|Rtsp):\\/\\/(?:(?:[a-zA-Z0-9\\$\\-\\_\\.\\+\\!\\*\\'\\(\\)"
+ "\\,\\;\\?\\&\\=]|(?:\\%[a-fA-F0-9]{2})){1,64}(?:\\:(?:[a-zA-Z0-9\\$\\-\\_"
+ "\\.\\+\\!\\*\\'\\(\\)\\,\\;\\?\\&\\=]|(?:\\%[a-fA-F0-9]{2})){1,25})?\\@)?)?"
+ "(?:" + DOMAIN_NAME + ")"
+ "(?:\\:\\d{1,5})?)"
+ "(\\/(?:(?:[" + GOOD_IRI_CHAR + "\\;\\/\\?\\:\\@\\&\\=\\#\\~"
+ "\\-\\.\\+\\!\\*\\'\\(\\)\\,\\_])|(?:\\%[a-fA-F0-9]{2}))*)?"
+ "(?:\\b|$)");
public final List<String> candidates;
public WebURLFinder(String string) {
if (string == null) {
throw new IllegalArgumentException("string must not be null");
}
this.candidates = candidateWebURLs(string);
}
public WebURLFinder(List<String> strings) {
if (strings == null) {
throw new IllegalArgumentException("strings must not be null");
}
this.candidates = candidateWebURLs(strings);
}
/**
* Check if string is a Web URL.
* <p>
* A Web URL is a URI that is not a <code>file:</code> or
* <code>javascript:</code> scheme.
*
* @param string
* to check.
* @return <code>true</code> if <code>string</code> is a Web URL.
*/
public static boolean isWebURL(String string) {
try {
new URI(string);
} catch (Exception e) {
return false;
}
if (android.webkit.URLUtil.isFileUrl(string) ||
android.webkit.URLUtil.isJavaScriptUrl(string)) {
return false;
}
return true;
}
/**
* Return best Web URL.
* <p>
* "Best" means a Web URL with a scheme, and failing that, a Web URL without a
* scheme.
*
* @return a Web URL or <code>null</code>.
*/
public String bestWebURL() {
String firstWebURLWithScheme = firstWebURLWithScheme();
if (firstWebURLWithScheme != null) {
return firstWebURLWithScheme;
}
return firstWebURLWithoutScheme();
}
protected static List<String> candidateWebURLs(Collection<String> strings) {
List<String> candidates = new ArrayList<String>();
for (String string : strings) {
if (string == null) {
continue;
}
candidates.addAll(candidateWebURLs(string));
}
return candidates;
}
protected static List<String> candidateWebURLs(String string) {
Matcher matcher = WEB_URL.matcher(string);
List<String> matches = new LinkedList<String>();
while (matcher.find()) {
// Remove URLs with bad schemes.
if (!isWebURL(matcher.group())) {
continue;
}
// Remove parts of email addresses.
if (matcher.start() > 0 && (string.charAt(matcher.start() - 1) == '@')) {
continue;
}
matches.add(matcher.group());
}
return matches;
}
protected String firstWebURLWithScheme() {
for (String match : candidates) {
try {
if (new URI(match).getScheme() != null) {
return match;
}
} catch (URISyntaxException e) {
// Ignore: on to the next.
continue;
}
}
return null;
}
protected String firstWebURLWithoutScheme() {
if (!candidates.isEmpty()) {
return candidates.get(0);
}
return null;
}
}
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