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Copyright 2010, Google Inc.
All rights reserved.
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modification, are permitted provided that the following conditions are
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* Redistributions of source code must retain the above copyright
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* Redistributions in binary form must reproduce the above
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in the documentation and/or other materials provided with the
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contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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*/
package com.google.refine.commands.project;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.Enumeration;
import java.util.Properties;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.google.refine.ProjectManager;
import com.google.refine.browsing.Engine;
import com.google.refine.commands.Command;
import com.google.refine.exporters.CsvExporter;
import com.google.refine.exporters.Exporter;
import com.google.refine.exporters.ExporterRegistry;
import com.google.refine.exporters.StreamExporter;
import com.google.refine.exporters.WriterExporter;
import com.google.refine.model.Project;
public class ExportRowsCommand extends Command {
@SuppressWarnings("unchecked")
static public Properties getRequestParameters(HttpServletRequest request) {
Properties options = new Properties();
Enumeration<String> en = request.getParameterNames();
while (en.hasMoreElements()) {
String name = en.nextElement();
options.put(name, request.getParameter(name));
}
return options;
}
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
ProjectManager.singleton.setBusy(true);
try {
Project project = getProject(request);
Engine engine = getEngine(request, project);
Properties params = getRequestParameters(request);
String format = params.getProperty("format");
Exporter exporter = ExporterRegistry.getExporter(format);
if (exporter == null) {
exporter = new CsvExporter('\t');
}
String contentType = params.getProperty("contentType");
if (contentType == null) {
contentType = exporter.getContentType();
}
response.setHeader("Content-Type", contentType);
if (exporter instanceof WriterExporter) {
String encoding = params.getProperty("encoding");
response.setCharacterEncoding(encoding != null ? encoding : "UTF-8");
Writer writer = encoding == null ?
response.getWriter() :
new OutputStreamWriter(response.getOutputStream(), encoding);
((WriterExporter) exporter).export(project, params, engine, writer);
writer.close();
} else if (exporter instanceof StreamExporter) {
response.setCharacterEncoding("UTF-8");
OutputStream stream = response.getOutputStream();
((StreamExporter) exporter).export(project, params, engine, stream);
stream.close();
// } else if (exporter instanceof UrlExporter) {
// ((UrlExporter) exporter).export(project, options, engine);
} else {
// TODO: Should this use ServletException instead of respondException?
respondException(response, new RuntimeException("Unknown exporter type"));
}
} catch (Exception e) {
// Use generic error handling rather than our JSON handling
throw new ServletException(e);
} finally {
ProjectManager.singleton.setBusy(false);
}
}
}