From f89b47f6dbeda2be8dd32f84c6e1a6f34fbd4390 Mon Sep 17 00:00:00 2001
From: Kenji Nagahashi <kenji@archive.org>
Date: Fri, 28 Mar 2014 13:52:34 -0700
Subject: [PATCH] FIX: directive with space before ":" gets ignored (ref.
 WWM-98)

---
 .../accesscontrol/robotstxt/RobotRules.java   | 22 ++++++++++++-------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/wayback-core/src/main/java/org/archive/wayback/accesscontrol/robotstxt/RobotRules.java b/wayback-core/src/main/java/org/archive/wayback/accesscontrol/robotstxt/RobotRules.java
index 5a2327a5ab..3b7653b4bb 100644
--- a/wayback-core/src/main/java/org/archive/wayback/accesscontrol/robotstxt/RobotRules.java
+++ b/wayback-core/src/main/java/org/archive/wayback/accesscontrol/robotstxt/RobotRules.java
@@ -30,6 +30,7 @@
 import java.util.List;
 import java.util.logging.Level;
 import java.util.logging.Logger;
+import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 import org.archive.wayback.util.ByteOp;
@@ -52,9 +53,9 @@ public class RobotRules {
 	 */
 	public static final String GLOBAL_USER_AGENT = "*";
 	
-	protected static final Pattern USER_AGENT_PATTERN = Pattern.compile("(?i)^User-agent:.*");
-	protected static final Pattern DISALLOW_PATTERN = Pattern.compile("(?i)Disallow:.*");
-	protected static final Pattern ALLOW_PATTERN = Pattern.compile("(?i)Allow:.*");
+	protected static final Pattern USER_AGENT_PATTERN = Pattern.compile("(?i)^User-agent\\s*:(.*)");
+	protected static final Pattern DISALLOW_PATTERN = Pattern.compile("(?i)Disallow\\s*:(.*)");
+	protected static final Pattern ALLOW_PATTERN = Pattern.compile("(?i)Allow\\s*:(.*)");
 	
 	private boolean bSyntaxErrors = false;
 	private HashMap<String, ArrayList<String>> rules = 
@@ -112,8 +113,9 @@ public void parse(InputStream is) throws IOException {
                     read = read.substring(0, commentIndex);
                 }
                 read = read.trim();
-                if (USER_AGENT_PATTERN.matcher(read).matches()) {
-                    String ua = read.substring(11).trim().toLowerCase();
+                Matcher uaMatcher = USER_AGENT_PATTERN.matcher(read);
+                if (uaMatcher.matches()) {
+                    String ua = uaMatcher.group(1).trim().toLowerCase();
                     if (current == null || current.size() != 0 || allowRuleFound || !lastLineUA) {
                         // only create new rules-list if necessary
                         // otherwise share with previous user-agent
@@ -124,16 +126,20 @@ public void parse(InputStream is) throws IOException {
                     currLineUA = true;
                     LOGGER.fine("Found User-agent(" + ua + ") rules...");
                     continue;
-                } else if (DISALLOW_PATTERN.matcher(read).matches()) {
+                }
+                Matcher disallowMatcher = DISALLOW_PATTERN.matcher(read);
+                if (disallowMatcher.matches()) {
                 	if (current == null) {
                         // buggy robots.txt
                     	bSyntaxErrors = true;
                         continue;
                     }
-                    String path = read.substring(9).trim();
+                    String path = disallowMatcher.group(1).trim();
                     current.add(path);
                     continue;
-                } else if (ALLOW_PATTERN.matcher(read).matches()) {
+                }
+                Matcher allowMatcher = ALLOW_PATTERN.matcher(read);
+                if (allowMatcher.matches()) {
                 	// Mark that there was an allow rule to clear the current list for next user-agent
                 	allowRuleFound = true;
                 }