Mercurial > hg > LGDataverses

comparison src/main/java/de/mpiwg/gazetteer/servlet/GetDatafile.java @ 12:c2e2d794847f

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new: add config.properties file for gazetteer
author Zoe Hong <zhong@mpiwg-berlin.mpg.de>
date Wed, 30 Sep 2015 13:43:54 +0200
parents
children be7787c36e58
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11:08c950a22cee 12:c2e2d794847f
1 package de.mpiwg.gazetteer.servlet;
2
3 import static edu.harvard.iq.dataverse.util.JsfHelper.JH;
4
5 import java.io.BufferedReader;
6 import java.io.File;
7 import java.io.FileInputStream;
8 import java.io.FileReader;
9 import java.io.IOException;
10 import java.io.InputStreamReader;
11 import java.nio.charset.Charset;
12 import java.nio.file.Files;
13 import java.nio.file.Path;
14 import java.nio.file.Paths;
15 import java.util.LinkedList;
16 import java.util.List;
17 import java.util.Scanner;
18 import java.util.logging.Level;
19 import java.util.logging.Logger;
20
21 import javax.ejb.EJB;
22 import javax.servlet.ServletException;
23 import javax.servlet.http.HttpServletRequest;
24 import javax.servlet.http.HttpServletResponse;
25 import javax.ws.rs.WebApplicationException;
26 import javax.ws.rs.core.Response;
27
28 import org.apache.commons.lang.StringUtils;
29 import org.primefaces.json.JSONArray;
30 import org.primefaces.json.JSONException;
31 import org.primefaces.json.JSONObject;
32
33 import edu.harvard.iq.dataverse.DataFile;
34 import edu.harvard.iq.dataverse.DataFileServiceBean;
35 import edu.harvard.iq.dataverse.FileMetadata;
36 import edu.harvard.iq.dataverse.api.DownloadInfo;
37 import edu.harvard.iq.dataverse.api.DownloadInstance;
38 import edu.harvard.iq.dataverse.authorization.AuthenticationRequest;
39 import edu.harvard.iq.dataverse.authorization.CredentialsAuthenticationProvider;
40 import edu.harvard.iq.dataverse.authorization.exceptions.AuthenticationFailedException;
41 import edu.harvard.iq.dataverse.authorization.users.AuthenticatedUser;
42 import edu.harvard.iq.dataverse.export.DDIExportServiceBean;
43
44
45
46 public class GetDatafile extends AbstractMonographServlet{
47
48
49 private static final Logger logger = Logger.getLogger(GetDatafile.class.getName());
50
51 @EJB
52 DataFileServiceBean dataFileService;
53
54
55
56 public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
57 // Set response content type
58 response.setContentType("application/json");
59 response.setCharacterEncoding("UTF-8");
60
61 JSONObject jsonResponse = new JSONObject();
62
63 Long fileId = Long.parseLong(request.getParameter("fileId"));
64
65 if(fileId != null){
66 // get datafile by fileId
67 System.out.println("getting file... fileId=" + fileId);
68
69 DataFile df = dataFileService.find(fileId);
70 try {
71 if (df == null) {
72 logger.warning("Access: datafile service could not locate a DataFile object for id "+fileId+"!");
73 jsonResponse.put("state", "error");
74
75 } else {
76
77 JSONObject jsonFile = new JSONObject();
78
79 jsonFile.put("fileLabel", df.getFileMetadata().getLabel());
80 jsonFile.put("fileName", df.getFileSystemName());
81 jsonFile.put("fileSize", df.getFilesize());
82
83 // get file data from file system
84 //Path filePath = df.getSavedOriginalFile(); // only works on tab-data
85
86 Path filePath = null;
87 if (df.getFileSystemName() != null && df.getFileSystemName().startsWith("/")) {
88 filePath = Paths.get(df.getFileSystemName());
89 } else {
90 Path studyDirectoryPath = df.getOwner().getFileSystemDirectory();
91 if (studyDirectoryPath == null) {
92 jsonResponse.put("state", "error");
93 //return;
94 }
95 String studyDirectory = studyDirectoryPath.toString();
96
97 filePath = Paths.get(studyDirectory, df.getFileSystemName());
98 }
99
100 if (filePath != null) {
101 String dataString = "";
102 File fileDir = new File(filePath.toString());
103 BufferedReader in = new BufferedReader( new InputStreamReader(
104 new FileInputStream(fileDir), "UTF8"));
105 String str;
106 while ((str = in.readLine()) != null) {
107 // TODO file may not be from LGServices which are not in the right format we can parse here
108
109 dataString += str.replace("\t", ",");
110 dataString += "\n";
111 }
112 in.close();
113
114 jsonFile.put("dataString", dataString);
115
116 jsonResponse.put("file", jsonFile);
117
118 jsonResponse.put("state", "ok");
119 }
120
121 }
122 } catch (JSONException e) {
123
124 e.printStackTrace();
125 }
126 }
127
128
129 // ======================
130
131 response.setHeader("Access-Control-Allow-Origin", "*");
132
133 java.io.PrintWriter out = response.getWriter();
134 out.print(jsonResponse);
135 out.flush();
136
137
138
139 }
140 }