/* $Id: ElasticSearchIndex.java 1299512 2012-03-12 00:58:38Z piergiorgio $ */
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.manifoldcf.agents.output.elasticsearch;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.Iterator;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.HttpEntity;
import org.apache.http.util.EntityUtils;
import org.apache.http.message.BasicHeader;
import org.apache.http.Header;
import org.apache.commons.io.IOUtils;
import org.apache.manifoldcf.agents.interfaces.RepositoryDocument;
import org.apache.manifoldcf.agents.interfaces.ServiceInterruption;
import org.apache.manifoldcf.core.common.Base64;
import org.apache.manifoldcf.core.interfaces.ManifoldCFException;
import org.apache.manifoldcf.crawler.system.Logging;
public class ElasticSearchIndex extends ElasticSearchConnection
{
/** The allow attribute name */
protected final static String allowAttributeName = "allow_token_";
/** The deny attribute name */
protected final static String denyAttributeName = "deny_token_";
/** The no-security token */
protected final static String noSecurityToken = "__nosecurity__";
/** Flag set as to whether null_value works in ES. Right now it doesn't work,
* so we have to do everything in the connector. */
protected final static boolean useNullValue = false;
private class IndexRequestEntity implements HttpEntity
{
private RepositoryDocument document;
private InputStream inputStream;
public IndexRequestEntity(RepositoryDocument document, InputStream inputStream)
throws ManifoldCFException
{
this.document = document;
this.inputStream = inputStream;
}
@Override
public boolean isChunked() {
return false;
}
@Override
public void consumeContent()
throws IOException {
EntityUtils.consume(this);
}
@Override
public boolean isRepeatable() {
return false;
}
@Override
public boolean isStreaming() {
return false;
}
@Override
public InputStream getContent()
throws IOException, IllegalStateException {
return inputStream;
}
@Override
public void writeTo(OutputStream out)
throws IOException {
PrintWriter pw = new PrintWriter(new OutputStreamWriter(out, "utf-8"));
try
{
pw.print("{");
Iterator<String> i = document.getFields();
boolean needComma = false;
while (i.hasNext()){
String fieldName = i.next();
String[] fieldValues = document.getFieldAsStrings(fieldName);
needComma = writeField(pw, needComma, fieldName, fieldValues);
}
needComma = writeACLs(pw, needComma, "document", document.getACL(), document.getDenyACL());
needComma = writeACLs(pw, needComma, "share", document.getShareACL(), document.getShareDenyACL());
if(inputStream!=null){
if(needComma){
pw.print(",");
}
pw.print("\"type\" : \"attachment\",");
String contentType = document.getMimeType();
if (contentType != null)
pw.print("\"_content_type\" : "+jsonStringEscape(contentType)+",");
String fileName = document.getFileName();
if (fileName != null)
pw.print("\"_name\" : "+jsonStringEscape(fileName)+",");
pw.print("\"file\" : \"");
Base64 base64 = new Base64();
base64.encodeStream(inputStream, pw);
pw.print("\"");
}
pw.print("}");
} catch (ManifoldCFException e)
{
throw new IOException(e.getMessage());
} finally
{
pw.flush();
IOUtils.closeQuietly(pw);
}
}
@Override
public long getContentLength() {
// Unknown (chunked) length
return -1L;
}
@Override
public Header getContentType() {
return new BasicHeader("Content-type","application/x-www-form-urlencoded");
}
@Override
public Header getContentEncoding() {
return null;
}
}
protected static boolean writeField(PrintWriter pw, boolean needComma,
String fieldName, String[] fieldValues)
throws IOException
{
if (fieldValues == null)
return needComma;
for(int j=0; j<fieldValues.length; j++){
if (needComma)
pw.print(",");
String fieldValue = fieldValues[j];
pw.print(jsonStringEscape(fieldName)+" : "+jsonStringEscape(fieldValue));
needComma = true;
}
return needComma;
}
/** Output an acl level */
protected static boolean writeACLs(PrintWriter pw, boolean needComma,
String aclType, String[] acl, String[] denyAcl)
throws IOException
{
String metadataACLName = allowAttributeName + aclType;
if (acl != null && acl.length > 0)
needComma = writeField(pw,needComma,metadataACLName,acl);
else if (!useNullValue)
needComma = writeField(pw,needComma,metadataACLName,new String[]{noSecurityToken});
String metadataDenyACLName = denyAttributeName + aclType;
if (denyAcl != null && denyAcl.length > 0)
needComma = writeField(pw,needComma,metadataDenyACLName,denyAcl);
else if (!useNullValue)
needComma = writeField(pw,needComma,metadataDenyACLName,new String[]{noSecurityToken});
return needComma;
}
protected static String jsonStringEscape(String value)
{
StringBuilder sb = new StringBuilder("\"");
for (int i = 0; i < value.length(); i++)
{
char x = value.charAt(i);
if (x == '\"' || x == '\\' || x == '/')
sb.append('\\');
sb.append(x);
}
sb.append("\"");
return sb.toString();
}
public ElasticSearchIndex(HttpClient client, ElasticSearchConfig config)
{
super(config, client);
}
/** Do the indexing.
*@return false to indicate that the document was rejected.
*/
public boolean execute(String documentURI, RepositoryDocument document,
InputStream inputStream) throws ManifoldCFException, ServiceInterruption
{
String idField;
try
{
idField = java.net.URLEncoder.encode(documentURI,"utf-8");
}
catch (java.io.UnsupportedEncodingException e)
{
throw new ManifoldCFException(e.getMessage(),e);
}
StringBuffer url = getApiUrl(config.getIndexType() + "/" + idField, false);
HttpPut put = new HttpPut(url.toString());
put.setEntity(new IndexRequestEntity(document, inputStream));
if (call(put) == false)
return false;
if ("true".equals(checkJson(jsonStatus)))
return true;
String error = checkJson(jsonException);
setResult(Result.ERROR, error);
Logging.connectors.warn("ES: Index failed: "+getResponse());
return true;
}
}