Mercurial > hg > LGDataverses

annotate src/main/java/de/mpiwg/gazetteer/servlet/GetDatafile.java @ 14:be7787c36e58 default tip

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new: nofity LGSercies for deleted files
author Zoe Hong <zhong@mpiwg-berlin.mpg.de>
date Mon, 02 Nov 2015 16:41:23 +0100
parents c2e2d794847f
children
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1 package de.mpiwg.gazetteer.servlet;
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3 import static edu.harvard.iq.dataverse.util.JsfHelper.JH;
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4
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5 import java.io.BufferedReader;
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6 import java.io.File;
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7 import java.io.FileInputStream;
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8 import java.io.FileReader;
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9 import java.io.IOException;
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10 import java.io.InputStreamReader;
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11 import java.nio.charset.Charset;
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12 import java.nio.file.Files;
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13 import java.nio.file.Path;
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14 import java.nio.file.Paths;
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15 import java.util.LinkedList;
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16 import java.util.List;
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17 import java.util.Scanner;
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18 import java.util.logging.Level;
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19 import java.util.logging.Logger;
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21 import javax.ejb.EJB;
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22 import javax.servlet.ServletException;
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23 import javax.servlet.http.HttpServletRequest;
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24 import javax.servlet.http.HttpServletResponse;
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25 import javax.ws.rs.WebApplicationException;
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26 import javax.ws.rs.core.Response;
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28 import org.apache.commons.lang.StringUtils;
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29 import org.primefaces.json.JSONArray;
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30 import org.primefaces.json.JSONException;
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31 import org.primefaces.json.JSONObject;
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33 import edu.harvard.iq.dataverse.DataFile;
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34 import edu.harvard.iq.dataverse.DataFileServiceBean;
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35 import edu.harvard.iq.dataverse.FileMetadata;
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36 import edu.harvard.iq.dataverse.api.DownloadInfo;
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37 import edu.harvard.iq.dataverse.api.DownloadInstance;
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38 import edu.harvard.iq.dataverse.authorization.AuthenticationRequest;
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39 import edu.harvard.iq.dataverse.authorization.CredentialsAuthenticationProvider;
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40 import edu.harvard.iq.dataverse.authorization.exceptions.AuthenticationFailedException;
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41 import edu.harvard.iq.dataverse.authorization.users.AuthenticatedUser;
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42 import edu.harvard.iq.dataverse.export.DDIExportServiceBean;
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46 public class GetDatafile extends AbstractMonographServlet{
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49 private static final Logger logger = Logger.getLogger(GetDatafile.class.getName());
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50
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51 @EJB
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52 DataFileServiceBean dataFileService;
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55
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56 public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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57 // Set response content type
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58 response.setContentType("application/json");
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59 response.setCharacterEncoding("UTF-8");
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60
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61 JSONObject jsonResponse = new JSONObject();
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62
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63 Long fileId = Long.parseLong(request.getParameter("fileId"));
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64
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65 if(fileId != null){
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66 // get datafile by fileId
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67 System.out.println("getting file... fileId=" + fileId);
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68
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69 DataFile df = dataFileService.find(fileId);
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70 try {
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71 if (df == null) {
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72 logger.warning("Access: datafile service could not locate a DataFile object for id "+fileId+"!");
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73 jsonResponse.put("state", "error");
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74
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75 } else {
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76
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77 JSONObject jsonFile = new JSONObject();
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78
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79 jsonFile.put("fileLabel", df.getFileMetadata().getLabel());
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80 jsonFile.put("fileName", df.getFileSystemName());
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81 jsonFile.put("fileSize", df.getFilesize());
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82
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83 // get file data from file system
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84 //Path filePath = df.getSavedOriginalFile(); // only works on tab-data
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85
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86 Path filePath = null;
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87 if (df.getFileSystemName() != null && df.getFileSystemName().startsWith("/")) {
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88 filePath = Paths.get(df.getFileSystemName());
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89 } else {
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90 Path studyDirectoryPath = df.getOwner().getFileSystemDirectory();
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91 if (studyDirectoryPath == null) {
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92 jsonResponse.put("state", "error");
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93 //return;
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94 }
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95 String studyDirectory = studyDirectoryPath.toString();
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96
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97 filePath = Paths.get(studyDirectory, df.getFileSystemName());
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98 }
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99
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100 if (filePath != null) {
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101 String dataString = "";
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102 File fileDir = new File(filePath.toString());
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103 BufferedReader in = new BufferedReader( new InputStreamReader(
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104 new FileInputStream(fileDir), "UTF8"));
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105 String str;
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106 while ((str = in.readLine()) != null) {
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107 // TODO file may not be from LGServices which are not in the right format we can parse here
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108
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109 dataString += str.replace("\t", ",");
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110 dataString += "\n";
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111 }
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112 in.close();
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113
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114 jsonFile.put("dataString", dataString);
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115
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116 jsonResponse.put("file", jsonFile);
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117
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118 jsonResponse.put("state", "ok");
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119 }
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120
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121 }
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122 } catch (JSONException e) {
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123
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124 e.printStackTrace();
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125 }
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126 }
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127
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128
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129 // ======================
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130
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131 response.setHeader("Access-Control-Allow-Origin", "*");
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132
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133 java.io.PrintWriter out = response.getWriter();
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134 out.print(jsonResponse);
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135 out.flush();
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136
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137
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138
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139 }
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140 }