Fixed StringIndexOutOfBoundsException case.

Revealed by commit c77e43a : the exception was then thrown when indexing
pages containing mailto: scheme URL links with the Solr Webgraph core
enabled.
Fixed the error case and restored filtering on mailto links in
Document.resortLinks() as these URLs still should not appear in
Document.hyperlinks.

source/net/yacy/document/Document.java

@@ -560,6 +560,10 @@ dc_rights
                 if (url == null) continue;
                 u = url.toNormalform(true);
                 final String name = url.getNameProperty();
+                // check mailto scheme first (not supposed to get into in/outboundlinks or hyperlinks -> crawler can't process)
+                if (url.getProtocol().equals("mailto")) {
+                    continue;
+                }
 
                 final boolean noindex = url.getRelProperty().toLowerCase().indexOf("noindex",0) >= 0;
                 final boolean nofollow = url.getRelProperty().toLowerCase().indexOf("nofollow",0) >= 0;

source/net/yacy/search/schema/WebgraphConfiguration.java

@@ -157,9 +157,8 @@ public class WebgraphConfiguration extends SchemaConfiguration implements Serial
 
         // add the source attributes
         add(edge, WebgraphSchema.source_id_s, source_id);
-        int pr_source = source_url_string.indexOf("://",0);
-        if (allAttr || contains(WebgraphSchema.source_protocol_s)) add(edge, WebgraphSchema.source_protocol_s, source_url_string.substring(0, pr_source));
-        if (allAttr || contains(WebgraphSchema.source_urlstub_s)) add(edge, WebgraphSchema.source_urlstub_s, source_url_string.substring(pr_source + 3));
+        if (allAttr || contains(WebgraphSchema.source_protocol_s)) add(edge, WebgraphSchema.source_protocol_s, source_url.getProtocol());
+        if (allAttr || contains(WebgraphSchema.source_urlstub_s)) add(edge, WebgraphSchema.source_urlstub_s, source_url.urlstub(true, true));
         Map<String, String> source_searchpart = source_url.getSearchpartMap();
         if (source_searchpart == null) {
             if (allAttr || contains(WebgraphSchema.source_parameter_count_i)) add(edge, WebgraphSchema.source_parameter_count_i, 0);
@@ -217,9 +216,8 @@ public class WebgraphConfiguration extends SchemaConfiguration implements Serial
         // add the target attributes
         add(edge, WebgraphSchema.target_id_s, target_id);
         final String target_url_string = target_url.toNormalform(false);
-        int pr_target = target_url_string.indexOf("://",0);
-        if (allAttr || contains(WebgraphSchema.target_protocol_s)) add(edge, WebgraphSchema.target_protocol_s, target_url_string.substring(0, pr_target));
-        if (allAttr || contains(WebgraphSchema.target_urlstub_s)) add(edge, WebgraphSchema.target_urlstub_s, target_url_string.substring(pr_target + 3));
+        if (allAttr || contains(WebgraphSchema.target_protocol_s)) add(edge, WebgraphSchema.target_protocol_s, target_url.getProtocol());
+        if (allAttr || contains(WebgraphSchema.target_urlstub_s)) add(edge, WebgraphSchema.target_urlstub_s, target_url.urlstub(true, true));
         Map<String, String> target_searchpart = target_url.getSearchpartMap();
         if (target_searchpart == null) {
             if (allAttr || contains(WebgraphSchema.target_parameter_count_i)) add(edge, WebgraphSchema.target_parameter_count_i, 0);