org.argeo.app.servlet.odk/src/org/argeo/app/servlet/odk/OdkSubmissionServlet.java

   1 package org.argeo.app.servlet.odk;
   2
   3 import java.io.IOException;
   4 import java.nio.file.Files;
   5 import java.nio.file.Path;
   6 import java.time.Instant;
   7 import java.time.ZoneId;
   8 import java.time.ZoneOffset;
   9 import java.time.format.DateTimeFormatter;
  10 import java.util.HashSet;
  11 import java.util.Set;
  12
  13 import javax.jcr.ImportUUIDBehavior;
  14 import javax.jcr.Node;
  15 import javax.jcr.Property;
  16 import javax.jcr.nodetype.NodeType;
  17 import javax.servlet.ServletException;
  18 import javax.servlet.http.HttpServlet;
  19 import javax.servlet.http.HttpServletRequest;
  20 import javax.servlet.http.HttpServletResponse;
  21 import javax.servlet.http.Part;
  22
  23 import org.argeo.api.acr.Content;
  24 import org.argeo.api.cms.CmsLog;
  25 import org.argeo.api.cms.CmsSession;
  26 import org.argeo.app.api.AppUserState;
  27 import org.argeo.app.image.ImageProcessor;
  28 import org.argeo.app.odk.OrxType;
  29 import org.argeo.app.xforms.FormSubmissionListener;
  30 import org.argeo.cms.auth.RemoteAuthRequest;
  31 import org.argeo.cms.auth.RemoteAuthUtils;
  32 import org.argeo.cms.jcr.acr.JcrContent;
  33 import org.argeo.cms.servlet.ServletHttpRequest;
  34 import org.argeo.jcr.JcrUtils;
  35
  36 /** Receives a form submission. */
  37 public class OdkSubmissionServlet extends HttpServlet {
  38         private static final long serialVersionUID = 7834401404691302385L;
  39         private final static CmsLog log = CmsLog.getLog(OdkSubmissionServlet.class);
  40
  41         private final static String XML_SUBMISSION_FILE = "xml_submission_file";
  42         private final static String IS_INCOMPLETE = "*isIncomplete*";
  43
  44         private DateTimeFormatter submissionNameFormatter = DateTimeFormatter.ofPattern("YYYY-MM-dd-HHmmssSSS")
  45                         .withZone(ZoneId.from(ZoneOffset.UTC));
  46
  47         private Set<FormSubmissionListener> submissionListeners = new HashSet<>();
  48
  49         private AppUserState appUserState;
  50
  51         @Override
  52         protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
  53                 resp.setContentType("text/xml; charset=utf-8");
  54                 resp.setHeader("X-OpenRosa-Version", "1.0");
  55                 resp.setDateHeader("Date", System.currentTimeMillis());
  56
  57                 RemoteAuthRequest request = new ServletHttpRequest(req);
  58                 CmsSession cmsSession = RemoteAuthUtils.getCmsSession(request);
  59
  60                 boolean isIncomplete = false;
  61                 try {
  62                         Content sessionDir = appUserState.getOrCreateSessionDir(cmsSession);
  63                         Node cmsSessionNode = sessionDir.adapt(Node.class);
  64                         String submissionName = submissionNameFormatter.format(Instant.now());
  65                         Node submission = cmsSessionNode.addNode(submissionName, OrxType.submission.get());
  66                         String submissionPath = submission.getPath();
  67                         for (Part part : req.getParts()) {
  68                                 String partNameSane = JcrUtils.replaceInvalidChars(part.getName());
  69                                 if (log.isTraceEnabled())
  70                                         log.trace("Part: " + part.getName() + ", " + part.getContentType());
  71
  72                                 if (part.getName().equals(XML_SUBMISSION_FILE)) {
  73                                         Node xml = submission.addNode(XML_SUBMISSION_FILE, NodeType.NT_UNSTRUCTURED);
  74                                         cmsSessionNode.getSession().importXML(xml.getPath(), part.getInputStream(),
  75                                                         ImportUUIDBehavior.IMPORT_UUID_COLLISION_REPLACE_EXISTING);
  76
  77                                 } else if (part.getName().equals(IS_INCOMPLETE)) {
  78                                         isIncomplete = true;
  79                                         log.debug("Form submission " + submissionPath + " is incomplete, expecting more to be uploaded...");
  80                                 } else {
  81                                         Node fileNode;
  82                                         if (part.getName().endsWith(".jpg")) {
  83                                                 // Fix metadata
  84                                                 Path temp = Files.createTempFile("image", ".jpg");
  85                                                 try {
  86                                                         ImageProcessor imageProcessor = new ImageProcessor(() -> part.getInputStream(),
  87                                                                         () -> Files.newOutputStream(temp));
  88                                                         imageProcessor.process();
  89                                                         fileNode = JcrUtils.copyStreamAsFile(submission, partNameSane, Files.newInputStream(temp));
  90                                                 } finally {
  91                                                         Files.deleteIfExists(temp);
  92                                                 }
  93                                         } else {
  94                                                 fileNode = JcrUtils.copyStreamAsFile(submission, partNameSane, part.getInputStream());
  95                                         }
  96                                         String contentType = part.getContentType();
  97                                         if (contentType != null) {
  98                                                 fileNode.addMixin(NodeType.MIX_MIMETYPE);
  99                                                 fileNode.setProperty(Property.JCR_MIMETYPE, contentType);
 100                                         }
 101                                         if (part.getName().endsWith(".jpg") || part.getName().endsWith(".png")) {
 102                                                 // TODO meta data and thumbnails
 103                                         }
 104                                 }
 105                         }
 106
 107                         cmsSessionNode.getSession().save();
 108                         try {
 109                                 for (FormSubmissionListener submissionListener : submissionListeners) {
 110                                         submissionListener.formSubmissionReceived(JcrContent.nodeToContent(submission), isIncomplete);
 111                                 }
 112                         } catch (Exception e) {
 113                                 log.error("Cannot save submission, cancelling...", e);
 114                                 if (cmsSessionNode.getSession().hasPendingChanges())
 115                                         cmsSessionNode.getSession().refresh(false);// discard
 116                                 if (cmsSessionNode.getSession().itemExists(submissionPath))
 117                                         submission.remove();
 118                                 cmsSessionNode.getSession().save();
 119                                 resp.setStatus(503);
 120                                 return;
 121                         }
 122
 123                 } catch (Exception e) {
 124                         log.error("Cannot save submission", e);
 125                         resp.setStatus(503);
 126                         return;
 127                 }
 128
 129                 resp.setStatus(201);
 130                 resp.getWriter().write("<OpenRosaResponse xmlns=\"http://openrosa.org/http/response\">"
 131                                 + "<message>Form Received!</message>" + "</OpenRosaResponse>");
 132
 133         }
 134
 135         public synchronized void addSubmissionListener(FormSubmissionListener listener) {
 136                 submissionListeners.add(listener);
 137         }
 138
 139         public synchronized void removeSubmissionListener(FormSubmissionListener listener) {
 140                 submissionListeners.remove(listener);
 141         }
 142
 143         public void setAppUserState(AppUserState appUserState) {
 144                 this.appUserState = appUserState;
 145         }
 146
 147 }