added access right control to wiki and changed access policy

- by default, only the admin is allowed to make changes to wiki pages
- the admin may allow changes to everybody

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@3019 6c8d7289-2bf4-0310-a012-ef5d649a1542

htroot/Wiki.html

@@ -16,10 +16,10 @@
         #[page]#
       </div>
       <p class="PostInfo">
-         last edited by #[author]# | change date #[date]# | <a href="Wiki.html?page=#[pagename]#&amp;edit=Edit">Edit</a>
+         last edited by #[author]# | change date #[date]# | <a href="Wiki.html?page=#[pagename]#&amp;edit=Edit">Edit</a> #(access)#(only granted to admin)::#(/access)#
       </p>
     </div>
-    <p class="Navigation"><a href="Wiki.html">Start Page</a> - <a href="Wiki.html?index=Index">Index</a></p>
+    <p class="Navigation"><a href="Wiki.html">Start Page</a> - <a href="Wiki.html?index=Index">Index</a> - #(access)#<a href="Wiki.html?access=all">Grant Write Access to Everybody</a>::<a href="Wiki.html?access=admin">Grant Write Access to Admin only</a>#(/access)#</p>
     ::
     <!-- 1: edit -->
     <form action="Wiki.html" method="post" enctype="multipart/form-data" accept-charset="UTF-8">

htroot/Wiki.java

@@ -81,6 +81,7 @@ public class Wiki {
             post.put("page", "start");
         }
 
+        String access = switchboard.getConfig("WikiAccess", "admin");
         String pagename = post.get("page", "start");
         String ip = post.get("CLIENTIP", "127.0.0.1");
         String author = post.get("author", "anonymous");
@@ -92,7 +93,28 @@ public class Wiki {
             }
         }
         
+        if (post.containsKey("access")) {
+            // only the administrator may change the access right
+            if (!switchboard.verifyAuthentication(header, true)) {
+                // check access right for admin
+                prop.put("AUTHENTICATE", "admin log-in"); // force log-in
+                return prop;
+            }
+            
+            access = post.get("access", "admin");
+            switchboard.setConfig("WikiAccess", access);
+        }
+        if (access.equals("admin")) prop.put("mode_access", 0);
+        if (access.equals("all"))   prop.put("mode_access", 1);
+        
         if (post.containsKey("submit")) {
+            
+            if ((access.equals("admin") && (!switchboard.verifyAuthentication(header, true)))) {
+                // check access right for admin
+                prop.put("AUTHENTICATE", "admin log-in"); // force log-in
+                return prop;
+            }
+            
             // store a new page
             byte[] content;
             try {
@@ -111,6 +133,12 @@ public class Wiki {
         wikiBoard.entry page = switchboard.wikiDB.read(pagename);
 
         if (post.containsKey("edit")) {
+            if ((access.equals("admin") && (!switchboard.verifyAuthentication(header, true)))) {
+                // check access right for admin
+                prop.put("AUTHENTICATE", "admin log-in"); // force log-in
+                return prop;
+            }
+            
             // edit the page
             try {
                 prop.put("mode", 1); //edit

yacy.init

@@ -846,3 +846,12 @@ showSurftipps = true
 #    http://localhost:8080/soap/test?wsdl
 #
 soap.serviceDeploymentList =
+
+
+# Wiki access rights
+# the built - in wiki system allowes by default only that the administration is allowed to make changes
+# this can be changed. There are three options:
+# admin - only the admin has write right
+# all   - everybody has write right
+# user  - the admin and every user registered in the user db has write right
+WikiAccess = admin