322 lines
12 KiB
Java
322 lines
12 KiB
Java
/*
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Copyright 2011, Google Inc.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following disclaimer
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in the documentation and/or other materials provided with the
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distribution.
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* Neither the name of Google Inc. nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package com.google.refine.importing;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.io.StringWriter;
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import java.io.Writer;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Properties;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.json.JSONArray;
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import org.json.JSONException;
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import org.json.JSONObject;
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import org.json.JSONWriter;
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import com.google.refine.RefineServlet;
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import com.google.refine.commands.HttpUtilities;
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import com.google.refine.importing.ImportingManager.Format;
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import com.google.refine.util.JSONUtilities;
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import com.google.refine.util.ParsingUtilities;
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public class DefaultImportingController implements ImportingController {
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protected RefineServlet servlet;
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@Override
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public void init(RefineServlet servlet) {
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this.servlet = servlet;
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}
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@Override
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public void doGet(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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throw new ServletException("GET verb not implemented");
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}
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@Override
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public void doPost(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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/*
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* The uploaded file is in the POST body as a "file part". If
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* we call request.getParameter() then the POST body will get
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* read and we won't have a chance to parse the body ourselves.
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* This is why we have to parse the URL for parameters ourselves.
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*/
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Properties parameters = ParsingUtilities.parseUrlParameters(request);
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String subCommand = parameters.getProperty("subCommand");
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if ("load-raw-data".equals(subCommand)) {
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doLoadRawData(request, response, parameters);
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} else if ("update-file-selection".equals(subCommand)) {
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doUpdateFileSelection(request, response, parameters);
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} else if ("initialize-parser-ui".equals(subCommand)) {
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doInitializeParserUI(request, response, parameters);
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} else if ("update-format-and-options".equals(subCommand)) {
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doUpdateFormatAndOptions(request, response, parameters);
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} else if ("create-project".equals(subCommand)) {
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doCreateProject(request, response, parameters);
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} else {
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HttpUtilities.respond(response, "error", "No such sub command");
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}
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}
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private void doLoadRawData(HttpServletRequest request, HttpServletResponse response, Properties parameters)
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throws ServletException, IOException {
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long jobID = Long.parseLong(parameters.getProperty("jobID"));
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ImportingJob job = ImportingManager.getJob(jobID);
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if (job == null) {
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HttpUtilities.respond(response, "error", "No such import job");
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return;
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}
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job.updating = true;
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try {
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JSONObject config = job.getOrCreateDefaultConfig();
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if (!("new".equals(config.getString("state")))) {
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HttpUtilities.respond(response, "error", "Job already started; cannot load more data");
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return;
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}
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ImportingUtilities.loadDataAndPrepareJob(
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request, response, parameters, job, config);
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} catch (JSONException e) {
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throw new ServletException(e);
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} finally {
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job.touch();
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job.updating = false;
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}
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}
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private void doUpdateFileSelection(HttpServletRequest request, HttpServletResponse response, Properties parameters)
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throws ServletException, IOException {
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long jobID = Long.parseLong(parameters.getProperty("jobID"));
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ImportingJob job = ImportingManager.getJob(jobID);
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if (job == null) {
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HttpUtilities.respond(response, "error", "No such import job");
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return;
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}
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job.updating = true;
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try {
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JSONObject config = job.getOrCreateDefaultConfig();
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if (!("ready".equals(config.getString("state")))) {
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HttpUtilities.respond(response, "error", "Job not ready");
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return;
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}
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JSONArray fileSelectionArray = ParsingUtilities.evaluateJsonStringToArray(
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request.getParameter("fileSelection"));
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ImportingUtilities.updateJobWithNewFileSelection(job, fileSelectionArray);
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replyWithJobData(request, response, job);
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} catch (JSONException e) {
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throw new ServletException(e);
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} finally {
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job.touch();
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job.updating = false;
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}
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}
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private void doUpdateFormatAndOptions(HttpServletRequest request, HttpServletResponse response, Properties parameters)
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throws ServletException, IOException {
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long jobID = Long.parseLong(parameters.getProperty("jobID"));
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ImportingJob job = ImportingManager.getJob(jobID);
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if (job == null) {
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HttpUtilities.respond(response, "error", "No such import job");
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return;
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}
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job.updating = true;
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try {
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JSONObject config = job.getOrCreateDefaultConfig();
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if (!("ready".equals(config.getString("state")))) {
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HttpUtilities.respond(response, "error", "Job not ready");
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return;
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}
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String format = request.getParameter("format");
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JSONObject optionObj = ParsingUtilities.evaluateJsonStringToObject(
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request.getParameter("options"));
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List<Exception> exceptions = new LinkedList<Exception>();
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ImportingUtilities.previewParse(job, format, optionObj, exceptions);
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Writer w = response.getWriter();
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JSONWriter writer = new JSONWriter(w);
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try {
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writer.object();
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if (exceptions.size() == 0) {
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job.project.update(); // update all internal models, indexes, caches, etc.
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writer.key("status"); writer.value("ok");
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} else {
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writer.key("status"); writer.value("error");
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writer.key("errors");
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writer.array();
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writeErrors(writer, exceptions);
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writer.endArray();
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}
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writer.endObject();
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} catch (JSONException e) {
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throw new ServletException(e);
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} finally {
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w.flush();
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w.close();
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}
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} catch (JSONException e) {
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throw new ServletException(e);
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} finally {
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job.touch();
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job.updating = false;
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}
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}
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private void doInitializeParserUI(HttpServletRequest request, HttpServletResponse response, Properties parameters)
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throws ServletException, IOException {
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long jobID = Long.parseLong(parameters.getProperty("jobID"));
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ImportingJob job = ImportingManager.getJob(jobID);
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if (job == null) {
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HttpUtilities.respond(response, "error", "No such import job");
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return;
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}
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String format = request.getParameter("format");
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Format formatRecord = ImportingManager.formatToRecord.get(format);
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if (formatRecord != null && formatRecord.parser != null) {
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JSONObject options = formatRecord.parser.createParserUIInitializationData(
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job, job.getSelectedFileRecords(), format);
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JSONObject result = new JSONObject();
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JSONUtilities.safePut(result, "status", "ok");
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JSONUtilities.safePut(result, "options", options);
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HttpUtilities.respond(response, result.toString());
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} else {
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HttpUtilities.respond(response, "error", "Unrecognized format or format has no parser");
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}
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}
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private void doCreateProject(HttpServletRequest request, HttpServletResponse response, Properties parameters)
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throws ServletException, IOException {
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long jobID = Long.parseLong(parameters.getProperty("jobID"));
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ImportingJob job = ImportingManager.getJob(jobID);
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if (job == null) {
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HttpUtilities.respond(response, "error", "No such import job");
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return;
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}
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job.updating = true;
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job.touch();
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try {
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JSONObject config = job.getOrCreateDefaultConfig();
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if (!("ready".equals(config.getString("state")))) {
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HttpUtilities.respond(response, "error", "Job not ready");
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return;
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}
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String format = request.getParameter("format");
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JSONObject optionObj = ParsingUtilities.evaluateJsonStringToObject(
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request.getParameter("options"));
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List<Exception> exceptions = new LinkedList<Exception>();
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ImportingUtilities.createProject(job, format, optionObj, exceptions, false);
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HttpUtilities.respond(response, "ok", "done");
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} catch (JSONException e) {
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throw new ServletException(e);
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}
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}
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private void replyWithJobData(HttpServletRequest request, HttpServletResponse response, ImportingJob job)
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throws ServletException, IOException {
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Writer w = response.getWriter();
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JSONWriter writer = new JSONWriter(w);
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try {
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writer.object();
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writer.key("code"); writer.value("ok");
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writer.key("job"); job.write(writer, new Properties());
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writer.endObject();
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} catch (JSONException e) {
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throw new ServletException(e);
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} finally {
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w.flush();
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w.close();
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}
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}
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static public void writeErrors(JSONWriter writer, List<Exception> exceptions) throws JSONException {
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for (Exception e : exceptions) {
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StringWriter sw = new StringWriter();
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e.printStackTrace(new PrintWriter(sw));
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writer.object();
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writer.key("message");
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writer.value(e.getLocalizedMessage());
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writer.key("stack");
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writer.value(sw.toString());
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writer.endObject();
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}
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}
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static public JSONArray convertErrorsToJsonArray(List<Exception> exceptions) {
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JSONArray a = new JSONArray();
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for (Exception e : exceptions) {
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StringWriter sw = new StringWriter();
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e.printStackTrace(new PrintWriter(sw));
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JSONObject o = new JSONObject();
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JSONUtilities.safePut(o, "message", e.getLocalizedMessage());
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JSONUtilities.safePut(o, "stack", sw.toString());
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JSONUtilities.append(a, o);
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}
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return a;
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}
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}
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