Add option to add host to default blacklist from search result

- added authorized ikon/button to blacklist a host
- host is added to default blacklist
- insired by https://github.com/yacy/yacy_search_server/issues/213#issuecomment-412485190

htroot/env/base.css

@@ -594,6 +594,10 @@ a.deletelink:hover, a.deletelink:focus, div.searchresults:hover a.deletelink, di
   background:url(grafics/minus.gif) center center no-repeat;
 }
 
+a.blacklistlink:hover, a.blacklistlink:focus, div.searchresults:hover a.blacklistlink, div.searchresults.hover a.blacklistlink {
+  background:url(grafics/blkl.gif) center center no-repeat;
+}
+
 ul.SubMenu a.MenuItemLink {
   margin-top:0;
 }

htroot/yacysearch.java

@@ -30,6 +30,7 @@
 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.net.IDN;
+import java.net.MalformedURLException;
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
@@ -77,6 +78,8 @@ import net.yacy.kelondro.util.SetTools;
 import net.yacy.peers.EventChannel;
 import net.yacy.peers.NewsPool;
 import net.yacy.peers.graphics.ProfilingGraph;
+import net.yacy.repository.Blacklist;
+import static net.yacy.repository.BlacklistHelper.addBlacklistEntry;
 import net.yacy.search.EventTracker;
 import net.yacy.search.SearchAccessRateConstants;
 import net.yacy.search.Switchboard;
@@ -93,6 +96,7 @@ import net.yacy.search.ranking.RankingProfile;
 import net.yacy.server.serverObjects;
 import net.yacy.server.serverSwitch;
 import net.yacy.server.servletProperties;
+import net.yacy.utils.crypt;
 
 public class yacysearch {
 
@@ -697,6 +701,24 @@ public class yacysearch {
                 }
             }
 
+              // if a blacklist-button was hit, add host to default blacklist
+            if (post != null && post.containsKey("blacklisturl")) {
+
+                if (!sb.verifyAuthentication(header)) {
+                    prop.authenticationRequired();
+                    return prop;
+                }
+
+                String blacklisturl = crypt.simpleDecode(post.get("blacklisturl", "")); // url
+                try {
+                    MultiProtocolURL mpurl = new MultiProtocolURL(blacklisturl);
+                    addBlacklistEntry(
+                            Blacklist.defaultBlacklist(sb.listsPath),
+                            mpurl.getHost() + "/.*");
+                } catch (MalformedURLException e) {
+                }
+            }
+
             // check filters
             try {
                 Pattern.compile(urlmask);

htroot/yacysearchitem.html

@@ -21,6 +21,9 @@
       <a href="#[recommendlink]#" class="recommendlink" title="recommend"><img width="11" height="11" src="env/grafics/empty.gif" title="recommend" alt="recommend" class="recommendIcon" /></a>
       <a href="#[deletelink]#" title="delete" class="deletelink" ><img width="11" height="11" src="env/grafics/empty.gif" title="delete" alt="delete" class="deleteIcon" /></a>
     #(/recommend)#
+    #(blacklist)#::
+      <a href="#[blacklistlink]#" title="blacklist host" class="blacklistlink"><img width="11" height="11" src="env/grafics/empty.gif" title="blacklist host" alt="blacklist host" /></a>
+    #(/blacklist)#
     #(/authorized)#
   </div>
   <p class="url"><a href="#[link]#" id="url#[urlhash]#" target="#[target]#" #(noreferrer)#::rel="noreferrer"#(/noreferrer)#>#[urlname]#</a></p>

htroot/yacysearchitem.java

@@ -668,7 +668,9 @@ public class yacysearchitem {
 	}
 
     /**
-     * Add action links reserved to authorized users. All parameters must be non null.
+     * Add action links reserved to authorized users (adminRights). All
+     * parameters must be non null.
+     *
      * @param sb the main Switchboard instance
      * @param prop properties map to feed
      * @param theSearch search event
@@ -704,15 +706,18 @@ public class yacysearchitem {
         String recommendLink = linkBuilder.append("&recommendref=").append(urlhash).toString();
         linkBuilder.setLength(baseUrlLength);
 
+        final String blacklistLink = linkBuilder.append("&blacklisturl=").append(encodedURLString).toString();
+        linkBuilder.setLength(baseUrlLength); // cut off - for next new append
+
+        prop.put("content_authorized_blacklist_blacklistlink", blacklistLink);
         prop.put("content_authorized_bookmark_bookmarklink", bookmarkLink);
         prop.put("content_authorized_recommend_deletelink", deleteLink);
         prop.put("content_authorized_recommend_recommendlink", recommendLink);
 
         prop.put("content_authorized_recommend", (sb.peers.newsPool.getSpecific(NewsPool.OUTGOING_DB, NewsPool.CATEGORY_SURFTIPP_ADD, "url", resultUrlstring) == null) ? "1" : "0");
-		prop.put("content_authorized_urlhash", urlhash);
+        prop.put("content_authorized_blacklist", "1");
     }
 
-
     /**
      * Process search of image type and feed prop object. All parameters must not be null.
      * @param sb Switchboard instance

source/net/yacy/repository/Blacklist.java

@@ -451,7 +451,7 @@ public class Blacklist {
     }
 
     /**
-     * appends aN entry to the backlist source file and updates internal blacklist maps.
+     * appends an entry to the backlist source file and updates internal blacklist maps.
      * 
      * @param blacklistSourcefile name of the blacklist file (LISTS/*.black)
      * @param host host or host pattern