replaced yacydoc servlet usage by a solr result output using an html

output writer. This made the creation of a html result writer necessary
which is included in this commit. The yacydoc servlet was used to
present all metadata to a document, but the solr interface can serve for
this purpose in a much better way. All usages (instead one) of yacydoc
were replaced by a solr call. This affects also the 'metadata' link
attached to search results.

6 files changed, 202 insertions, 29 deletions

diff --git a/htroot/ConfigSearchPage_p.html b/htroot/ConfigSearchPage_p.html
index 613fcddad..d86c07b5b 100644
--- a/htroot/ConfigSearchPage_p.html
+++ b/htroot/ConfigSearchPage_p.html
@@ -177,7 +177,7 @@ $(function() {
                       <td width="15px"></td>
                       <td>#[content_showDate_date]#</td>
                       <td>&nbsp;|&nbsp;42 kbyte</td>
-                      <td>&nbsp;|&nbsp;<a href="api/yacydoc.html" target="LayouTest" onclick="return hs.htmlExpand(this, { objectType: 'ajax'} )">Metadata</a></td>
+                      <td>&nbsp;|&nbsp;<a href="/solr/select?q=*:*&defType=edismax&start=0&rows=3&core=collection1&wt=html" target="LayouTest" onclick="return hs.htmlExpand(this, { objectType: 'ajax'} )">Metadata</a></td>
                       <td>&nbsp;|&nbsp;<a href="ViewFile.html" target="LayouTest">Parser</a></td>
                       <td>&nbsp;|&nbsp;<a href="yacysearch.html" target="LayouTest">Pictures</a></td>
                       <td>&nbsp;|&nbsp;<a href="CacheResource_p.html" target="LayouTest">Cache</a></td>
diff --git a/htroot/IndexControlURLs_p.html b/htroot/IndexControlURLs_p.html
index c22c46516..c1fd4d14f 100644
--- a/htroot/IndexControlURLs_p.html
+++ b/htroot/IndexControlURLs_p.html
@@ -216,9 +216,9 @@ function updatepage(str) {
     

     #(genUrlProfile)#

     ::No entry found for URL-hash #[urlhash]#

-    ::<iframe src="/api/yacydoc.html?urlhash=#[urlhash]#" width="100%" height="420" frameborder="0" scrolling="no"></iframe><br />

+    ::<iframe src="/solr/select?defType=edismax&start=0&rows=3&core=collection1&wt=html&q=id:%22#[urlhash]#%22" width="100%" height="420" frameborder="0" scrolling="no"></iframe><br />

     <div id="api">

-    <a href="/api/yacydoc.html?urlhash=#[urlhash]#">

+    <a href="/solr/select?defType=edismax&start=0&rows=3&core=collection1&wt=html&q=id:%22#[urlhash]#%22">

     <img src="env/grafics/api.png" width="60" height="40" alt="API" /></a>

     <span>These document details can be retrieved as <a href="http://www.w3.org/TR/xhtml-rdfa-primer/">XHTML+RDFa</a>

     document containg <a href="http://www.w3.org/RDF/">RDF</a> annotations in <a href="http://dublincore.org/">Dublin Core</a> vocabulary.

diff --git a/htroot/ViewFile.html b/htroot/ViewFile.html
index abda39d6d..2bf65cbbf 100644
--- a/htroot/ViewFile.html
+++ b/htroot/ViewFile.html
@@ -88,39 +88,20 @@ function updatepage(str) {
         </dl>

       </fieldset>

     </form>

+<table border="0">

+<tr><td valign="top">

     #(error)#

     <form method="get" action="ViewFile.html" accept-charset="ascii">

       <fieldset><legend>URL Metadata</legend>

         <dl>

           <dt>URL:</dt><dd><a href="#[url]#">#[url]#</a></dd>

-          <dt>Hash:</dt><dd><a href="/api/yacydoc.html?urlhash=#[hash]#">#[hash]#</a></dd>

+          <dt>Hash:</dt><dd><a href="/solr/select?defType=edismax&start=0&rows=3&core=collection1&wt=html&q=id:%22#[hash]#%22">#[hash]#</a> (click this for full metadata)</dd>

           <dt>In Metadata:</dt><dd>#(inurldb)#no::yes#(/inurldb)#</dd>

           <dt>In Cache:</dt><dd>#(incache)#no::yes#(/incache)#</dd>

           <dt>Word Count:</dt><dd>#[wordCount]#</dd>

           <dt>Description:</dt><dd>#[desc]#</dd>

           <dt>Size:</dt><dd>#[size]# Bytes</dd>#(mimeTypeAvailable)#::

           <dt>MimeType:</dt><dd>#[mimeType]#</dd>#(/mimeTypeAvailable)#

-          <dt>Referrer Hash:</dt><dd>#[referrerHash]#</dd>

-          <dt>Modified Date:</dt><dd>#[moddate]#</dd>

-          <dt>Load Date:</dt><dd>#[loaddate]#</dd>

-          <dt>Fresh Date:</dt><dd>#[freshdate]#</dd>

-          <dt>Host Hash:</dt><dd>#[hosthash]#</dd>

-          <dt>dc_creator:</dt><dd>#[dc_creator]#</dd>

-          <dt>dc_publisher:</dt><dd>#[dc_publisher]#</dd>

-          <dt>dc_subject:</dt><dd>#[dc_subject]#</dd>

-          <dt>md5:</dt><dd>#[md5]#</dd>

-          <dt>lat:</dt><dd>#[lat]#</dd>

-          <dt>lon:</dt><dd>#[lon]#</dd>

-          <dt>doctype:</dt><dd>#[doctype]#</dd>

-          <dt>Language:</dt><dd>#[language]#</dd>

-          <dt>Flags:</dt><dd>#[flags]#</dd>

-          <dt>Word Count:</dt><dd>#[wordCount]#</dd>

-          <dt>Local Links:</dt><dd>#[llocal]#</dd>

-          <dt>Global Links:</dt><dd>#[lother]#</dd>

-          <dt>Image Links:</dt><dd>#[limage]#</dd>

-          <dt>Audio Links:</dt><dd>#[laudio]#</dd>

-          <dt>Video Links:</dt><dd>#[lvideo]#</dd>

-          <dt>App Links:</dt><dd>#[lapp]#</dd>

           <dt>Collections:</dt><dd>#[collections]#</dd>

           <dt>Triplestore:</dt><dd><pre>#[triples]#</pre></dd>

           <dt><label for="viewMode">View as</label>:</dt>

@@ -156,7 +137,7 @@ function updatepage(str) {
 :: <!-- 6 -->

 <span class="error">Unsupported protocol.</span>

 #(/error)#

-

+</td><td valign="top">

 #(viewMode)#

 :: <!-- 1 -->

 	<fieldset><legend>Original Content from Web</legend>

@@ -225,7 +206,7 @@ function updatepage(str) {
 	  </ol>

 	</fieldset>

 #(/viewMode)#

-

+</td></tr></table>

 

 #%env/templates/footer.template%#

 </body>

diff --git a/htroot/solr/select.java b/htroot/solr/select.java
index 00f872490..c127d2bae 100644
--- a/htroot/solr/select.java
+++ b/htroot/solr/select.java
@@ -33,6 +33,7 @@ import net.yacy.cora.federate.solr.SolrServlet;
 import net.yacy.cora.federate.solr.connector.EmbeddedSolrConnector;
 import net.yacy.cora.federate.solr.responsewriter.EnhancedXMLResponseWriter;
 import net.yacy.cora.federate.solr.responsewriter.GSAResponseWriter;
+import net.yacy.cora.federate.solr.responsewriter.HTMLResponseWriter;
 import net.yacy.cora.federate.solr.responsewriter.JsonResponseWriter;
 import net.yacy.cora.federate.solr.responsewriter.OpensearchResponseWriter;
 import net.yacy.cora.protocol.HeaderFramework;
@@ -83,6 +84,7 @@ public class select {
         xsltWriter.init(initArgs);
         RESPONSE_WRITER.put("xslt", xsltWriter); // try i.e. http://localhost:8090/solr/select?q=*:*&start=0&rows=10&wt=xslt&tr=json.xsl
         RESPONSE_WRITER.put("exml", new EnhancedXMLResponseWriter());
+        RESPONSE_WRITER.put("html", new HTMLResponseWriter());
         RESPONSE_WRITER.put("rss", opensearchResponseWriter); //try http://localhost:8090/solr/select?wt=rss&q=olympia&hl=true&hl.fl=text_t,h1,h2
         RESPONSE_WRITER.put("opensearch", opensearchResponseWriter); //try http://localhost:8090/solr/select?wt=rss&q=olympia&hl=true&hl.fl=text_t,h1,h2
         RESPONSE_WRITER.put("yjson", new JsonResponseWriter()); //try http://localhost:8090/solr/select?wt=json&q=olympia&hl=true&hl.fl=text_t,h1,h2
@@ -107,7 +109,7 @@ public class select {
         if ("exml".equals(wt)) return "application/rss+xml";
         if ("json".equals(wt)) return "application/json";
         if ("yjson".equals(wt)) return "application/json";
-        if ("python".equals(wt)) return "text/html";
+        if ("html".equals(wt) || "python".equals(wt)) return "text/html";
         if ("php".equals(wt) || "phps".equals(wt)) return "application/x-httpd-php";
         if ("ruby".equals(wt)) return "text/html";
         if ("raw".equals(wt)) return "application/octet-stream";
diff --git a/htroot/yacysearchitem.html b/htroot/yacysearchitem.html
index 906e3c95a..9b30e35b5 100644
--- a/htroot/yacysearchitem.html
+++ b/htroot/yacysearchitem.html
@@ -26,7 +26,7 @@
   <p class="urlinfo">
   #(showDate)#::#[date]##(/showDate)#
   #(showSize)#::&nbsp;|&nbsp;#[sizename]##(/showSize)#
-  #(showMetadata)#::&nbsp;|&nbsp;<a href="api/yacydoc.html?urlhash=#[urlhash]#" target="_blank" onclick="return hs.htmlExpand(this, { objectType: 'ajax'} )">Metadata</a>#(/showMetadata)#
+  #(showMetadata)#::&nbsp;|&nbsp;<a href="/solr/select?q=id:%22#[urlhash]#%22&defType=edismax&start=0&rows=1&core=collection1&wt=html" target="_blank" onclick="return hs.htmlExpand(this, { objectType: 'ajax'} )">Metadata</a>#(/showMetadata)#
   #(showParser)#::&nbsp;|&nbsp;<a href="ViewFile.html?urlHash=#[urlhash]#&amp;words=#[words]#" target="_blank">Parser</a>#(/showParser)#
   #(showPictures)#::&nbsp;|&nbsp;<a href="yacysearch.html?cat=image&amp;url=#[link]#&amp;query=#[former]#">Pictures</a>#(/showPictures)#
   #(showCache)#::&nbsp;|&nbsp;<a href="CacheResource_p.html?url=#[link]#" target="_blank">Cache</a>#(/showCache)#
diff --git a/source/net/yacy/cora/federate/solr/responsewriter/HTMLResponseWriter.java b/source/net/yacy/cora/federate/solr/responsewriter/HTMLResponseWriter.java
new file mode 100644
index 000000000..d2ca13f12
--- /dev/null
+++ b/source/net/yacy/cora/federate/solr/responsewriter/HTMLResponseWriter.java
@@ -0,0 +1,190 @@
+/**
+ *  HTMLResponseWriter
+ *  Copyright 2013 by Michael Peter Christen
+ *  First released 09.06.2013 at http://yacy.net
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with this program in the file lgpl21.txt
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.yacy.cora.federate.solr.responsewriter;
+
+import java.io.IOException;
+import java.io.Writer;
+import java.util.Date;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.regex.Pattern;
+
+import net.yacy.cora.federate.solr.SolrType;
+import net.yacy.search.schema.CollectionSchema;
+
+import org.apache.lucene.document.Document;
+import org.apache.lucene.index.IndexableField;
+import org.apache.solr.common.params.SolrParams;
+import org.apache.solr.common.util.NamedList;
+import org.apache.solr.common.util.XML;
+import org.apache.solr.request.SolrQueryRequest;
+import org.apache.solr.response.QueryResponseWriter;
+import org.apache.solr.response.ResultContext;
+import org.apache.solr.response.SolrQueryResponse;
+import org.apache.solr.schema.FieldType;
+import org.apache.solr.schema.IndexSchema;
+import org.apache.solr.schema.SchemaField;
+import org.apache.solr.schema.TextField;
+import org.apache.solr.search.DocIterator;
+import org.apache.solr.search.DocList;
+import org.apache.solr.search.SolrIndexSearcher;
+
+public class HTMLResponseWriter implements QueryResponseWriter {
+
+    private static final Set<String> DEFAULT_FIELD_LIST = null;
+    private static final Pattern dqp = Pattern.compile("\"");
+    
+    public HTMLResponseWriter() {
+        super();
+    }
+
+    @Override
+    public String getContentType(final SolrQueryRequest request, final SolrQueryResponse response) {
+        return CONTENT_TYPE_XML_UTF8;
+    }
+
+    @Override
+    public void init(@SuppressWarnings("rawtypes") NamedList n) {
+    }
+
+    @Override
+    public void write(final Writer writer, final SolrQueryRequest request, final SolrQueryResponse rsp) throws IOException {
+        NamedList<?> values = rsp.getValues();
+        assert values.get("responseHeader") != null;
+        assert values.get("response") != null;
+
+        writer.write("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n");
+        //writer.write("<!--\n");
+        //writer.write("this is a XHTML+RDFa file. It contains RDF annotations with dublin core properties\n");
+        //writer.write("you can validate it with http://validator.w3.org/\n");
+        //writer.write("-->\n");
+        writer.write("<html xmlns=\"http://www.w3.org/1999/xhtml\"\n");
+        writer.write("      xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\"\n");
+        writer.write("      xmlns:dc=\"http://purl.org/dc/elements/1.1/\"\n");
+        writer.write("      xmlns:foaf=\"http://xmlns.com/foaf/0.1/\">\n");
+        writer.write("<head profile=\"http://www.w3.org/2003/g/data-view\">\n");
+        //writer.write("<link rel=\"transformation\" href=\"http://www-sop.inria.fr/acacia/soft/RDFa2RDFXML.xsl\"/>\n");
+        writer.write("<link rel=\"stylesheet\" type=\"text/css\" media=\"all\" href=\"/env/base.css\" />\n");
+        writer.write("<link rel=\"stylesheet\" type=\"text/css\" media=\"screen\" href=\"/env/style.css\" />\n");
+        NamedList<Object> paramsList = request.getOriginalParams().toNamedList();
+        paramsList.remove("wt");
+        String xmlquery = dqp.matcher("/solr/select?" + SolrParams.toSolrParams(paramsList).toString()).replaceAll("%22");
+        writer.write("<div id=\"api\"><a href=\"" + xmlquery + "\"><img src=\"../env/grafics/api.png\" width=\"60\" height=\"40\" alt=\"API\" /></a>\n");
+        writer.write("<span>This search result can also be retrieved as XML. Click the API icon to see an example call to the search rss API.</div>\n");
+        
+        DocList response = ((ResultContext) values.get("response")).docs;
+        final int sz = response.size();
+        if (sz > 0) {
+            SolrIndexSearcher searcher = request.getSearcher();
+            DocIterator iterator = response.iterator();
+            IndexSchema schema = request.getSchema();
+            
+            if (sz == 1) {
+                int id = iterator.nextDoc();
+                Document doc = searcher.doc(id, DEFAULT_FIELD_LIST);
+                LinkedHashMap<String, String> tdoc = translateDoc(schema, doc);
+                String title = tdoc.get(CollectionSchema.title.getSolrFieldName());
+                writer.write("<title>" + title + "</title>\n</head><body>\n");
+                writeDoc(writer, tdoc, title);
+            } else {
+                writer.write("<title>Document List</title>\n</head><body>\n");
+                for (int i = 0; i < sz; i++) {
+                    int id = iterator.nextDoc();
+                    Document doc = searcher.doc(id, DEFAULT_FIELD_LIST);
+                    LinkedHashMap<String, String> tdoc = translateDoc(schema, doc);
+                    String title = tdoc.get(CollectionSchema.title.getSolrFieldName());
+                    writeDoc(writer, tdoc, title);
+                }
+            }
+        } else {
+            writer.write("<title>No Document Found</title>\n</head><body>\n");
+        }
+        
+        writer.write("</body></html>\n");
+    }
+
+    private static final void writeDoc(Writer writer, LinkedHashMap<String, String> tdoc, String title) throws IOException {
+        writer.write("<form name=\"yacydoc" + title + "\" method=\"post\" action=\"#\" enctype=\"multipart/form-data\" accept-charset=\"UTF-8\">\n");
+        writer.write("<fieldset>\n");
+        writer.write("<h1 property=\"dc:Title\">" + title + "</h1>\n");
+        writer.write("<dl>\n");
+        for (Map.Entry<String, String> entry: tdoc.entrySet()) {
+            writer.write("<dt>");
+            writer.write(entry.getKey());
+            writer.write("</dt><dd>");
+            XML.escapeAttributeValue(entry.getValue(), writer);
+            writer.write("</dd>\n");
+        }
+        writer.write("</dl>\n");
+        writer.write("</fieldset>\n");
+        writer.write("</form>\n");
+    }
+    
+    private static final LinkedHashMap<String, String> translateDoc(final IndexSchema schema, final Document doc) {
+        List<IndexableField> fields = doc.getFields();
+        int sz = fields.size();
+        int fidx1 = 0, fidx2 = 0;
+        LinkedHashMap<String, String> kv = new LinkedHashMap<String, String>();
+        while (fidx1 < sz) {
+            IndexableField value = fields.get(fidx1);
+            String fieldName = value.name();
+            fidx2 = fidx1 + 1;
+            while (fidx2 < sz && fieldName.equals(fields.get(fidx2).name())) {
+                fidx2++;
+            }
+            SchemaField sf = schema.getFieldOrNull(fieldName);
+            if (sf == null) sf = new SchemaField(fieldName, new TextField());
+            FieldType type = sf.getType();
+            
+            if (fidx1 + 1 == fidx2) {
+                if (sf.multiValued()) {
+                    String sv = value.stringValue();
+                    kv.put(fieldName, field2string(type, sv));
+                } else {
+                    kv.put(fieldName, field2string(type, value.stringValue()));
+                }
+            } else {
+                for (int i = fidx1; i < fidx2; i++) {
+                    String sv = fields.get(i).stringValue();
+                    kv.put(fieldName + "_" + i, field2string(type, sv));
+                }
+            }
+            
+            fidx1 = fidx2;
+        }
+        return kv;
+    }
+
+    @SuppressWarnings("deprecation")
+    private static String field2string(final FieldType type, final String value) {
+        String typeName = type.getTypeName();
+        if (typeName.equals(SolrType.bool.printName())) {
+            return "F".equals(value) ? "false" : "true";
+        } else if (typeName.equals(SolrType.date.printName())) {
+            return org.apache.solr.schema.DateField.formatExternal(new Date(Long.parseLong(value))); // this is declared deprecated in solr 4.2.1 but is still used as done here
+        }
+        return value;
+    }
+
+    // XML.escapeCharData(val, writer);
+}