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robinstrobinst
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Merge pull request #8 from MTDdk/master
adding the possibility for extracting www-based URLs as well
2 parents 5c1c3e0 + eb10bf4 commit 92b4d11

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10 files changed

+323
-163
lines changed

10 files changed

+323
-163
lines changed

‎.gitignore‎

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Original file line numberDiff line numberDiff line change
@@ -9,3 +9,4 @@
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# mvn
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target/
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/bin/

‎src/main/java/org/nibor/autolink/LinkExtractor.java‎

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@@ -3,6 +3,7 @@
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import org.nibor.autolink.internal.EmailScanner;
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import org.nibor.autolink.internal.Scanner;
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import org.nibor.autolink.internal.UrlScanner;
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import org.nibor.autolink.internal.WwwUrlScanner;
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import java.util.*;
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@@ -14,10 +15,12 @@
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public class LinkExtractor {
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private final Scanner urlScanner;
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private final Scanner wwwScanner;
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private final Scanner emailScanner;
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private LinkExtractor(UrlScanner urlScanner, EmailScanner emailScanner) {
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private LinkExtractor(UrlScanner urlScanner, WwwUrlScanner wwwScanner, EmailScanner emailScanner) {
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this.urlScanner = urlScanner;
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this.wwwScanner = wwwScanner;
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this.emailScanner = emailScanner;
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}
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@@ -46,6 +49,8 @@ private Scanner trigger(char c) {
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return urlScanner;
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case '@':
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return emailScanner;
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case 'w':
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return wwwScanner;
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}
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return null;
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}
@@ -88,8 +93,9 @@ public Builder emailDomainMustHaveDot(boolean emailDomainMustHaveDot) {
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*/
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public LinkExtractor build() {
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UrlScanner urlScanner = linkTypes.contains(LinkType.URL) ? new UrlScanner() : null;
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WwwUrlScanner wwwScanner = linkTypes.contains(LinkType.WWW) ? new WwwUrlScanner() : null;
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EmailScanner emailScanner = linkTypes.contains(LinkType.EMAIL) ? new EmailScanner(emailDomainMustHaveDot) : null;
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return new LinkExtractor(urlScanner, emailScanner);
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return new LinkExtractor(urlScanner, wwwScanner, emailScanner);
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}
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}
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‎src/main/java/org/nibor/autolink/LinkType.java‎

Lines changed: 5 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -11,5 +11,9 @@ public enum LinkType {
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/**
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* Email address such as {@code [email protected]}
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*/
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EMAIL
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EMAIL,
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/**
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* URL such as {@code www.example.com}
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*/
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WWW
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}

‎src/main/java/org/nibor/autolink/internal/LinkSpanImpl.java‎

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Original file line numberDiff line numberDiff line change
@@ -29,7 +29,7 @@ public int getBeginIndex() {
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public int getEndIndex() {
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return endIndex;
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}
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@Override
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public String toString() {
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return "Link{type=" + getType() + ", beginIndex=" + beginIndex + ", endIndex=" + endIndex + "}";

‎src/main/java/org/nibor/autolink/internal/Scanners.java‎

Lines changed: 156 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -17,4 +17,160 @@ public static boolean isAlnum(char c) {
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public static boolean isNonAscii(char c) {
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return c >= 0x80;
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}
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public static final int findUrlEnd(CharSequence input, int beginIndex) {
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int round = 0;
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int square = 0;
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int curly = 0;
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boolean doubleQuote = false;
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boolean singleQuote = false;
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int last = beginIndex;
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loop:
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for (int i = beginIndex; i < input.length(); i++) {
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char c = input.charAt(i);
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switch (c) {
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case '\u0000':
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case '\u0001':
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case '\u0002':
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case '\u0003':
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case '\u0004':
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case '\u0005':
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case '\u0006':
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case '\u0007':
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case '\u0008':
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case '\t':
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case '\n':
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case '\u000B':
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case '\f':
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case '\r':
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case '\u000E':
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case '\u000F':
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case '\u0010':
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case '\u0011':
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case '\u0012':
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case '\u0013':
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case '\u0014':
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case '\u0015':
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case '\u0016':
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case '\u0017':
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case '\u0018':
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case '\u0019':
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case '\u001A':
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case '\u001B':
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case '\u001C':
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case '\u001D':
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case '\u001E':
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case '\u001F':
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case ' ':
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case '<':
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case '>':
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case '\u007F':
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case '\u0080':
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case '\u0081':
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case '\u0082':
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case '\u0083':
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case '\u0084':
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case '\u0085':
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case '\u0086':
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case '\u0087':
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case '\u0088':
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case '\u0089':
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case '\u008A':
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case '\u008B':
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case '\u008C':
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case '\u008D':
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case '\u008E':
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case '\u008F':
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case '\u0090':
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case '\u0091':
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case '\u0092':
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case '\u0093':
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case '\u0094':
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case '\u0095':
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case '\u0096':
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case '\u0097':
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case '\u0098':
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case '\u0099':
94+
case '\u009A':
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case '\u009B':
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case '\u009C':
97+
case '\u009D':
98+
case '\u009E':
99+
case '\u009F':
100+
// These can never be part of an URL, so stop now. See RFC 3986 and RFC 3987.
101+
// Some characters are not in the above list, even they are not in "unreserved" or "reserved":
102+
// '"', '\\', '^', '`', '{', '|', '}'
103+
// The reason for this is that other link detectors also allow them. Also see below, we require
104+
// the quote and the braces to be balanced.
105+
break loop;
106+
case '?':
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case '!':
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case '.':
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case ',':
110+
case ':':
111+
case ';':
112+
// These may be part of an URL but not at the end
113+
break;
114+
case '/':
115+
// This may be part of an URL and at the end, but not if the previous character can't be the end of an URL
116+
if (last == i - 1) {
117+
last = i;
118+
}
119+
break;
120+
case '(':
121+
round++;
122+
break;
123+
case ')':
124+
round--;
125+
if (round >= 0) {
126+
last = i;
127+
} else {
128+
// More closing than opening brackets, stop now
129+
break loop;
130+
}
131+
break;
132+
case '[':
133+
// Allowed in IPv6 address host
134+
square++;
135+
break;
136+
case ']':
137+
// Allowed in IPv6 address host
138+
square--;
139+
if (square >= 0) {
140+
last = i;
141+
} else {
142+
// More closing than opening brackets, stop now
143+
break loop;
144+
}
145+
break;
146+
case '{':
147+
curly++;
148+
break;
149+
case '}':
150+
curly--;
151+
if (curly >= 0) {
152+
last = i;
153+
} else {
154+
// More closing than opening brackets, stop now
155+
break loop;
156+
}
157+
break;
158+
case '"':
159+
doubleQuote = !doubleQuote;
160+
if (!doubleQuote) {
161+
last = i;
162+
}
163+
break;
164+
case '\'':
165+
singleQuote = !singleQuote;
166+
if (!singleQuote) {
167+
last = i;
168+
}
169+
break;
170+
default:
171+
last = i;
172+
}
173+
}
174+
return last;
175+
}
20176
}

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