--- /dev/null
+package org.argeo.cms.integration;
+
+import java.io.IOException;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.TreeMap;
+
+import javax.jcr.Node;
+import javax.jcr.NodeIterator;
+import javax.jcr.Property;
+import javax.jcr.PropertyIterator;
+import javax.jcr.PropertyType;
+import javax.jcr.Repository;
+import javax.jcr.RepositoryException;
+import javax.jcr.Session;
+import javax.jcr.Value;
+import javax.jcr.nodetype.NodeType;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.commons.io.IOUtils;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.jackrabbit.api.JackrabbitNode;
+import org.apache.jackrabbit.api.JackrabbitValue;
+import org.argeo.jcr.JcrUtils;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+/** Access a JCR repository via web services. */
+public class JcrReadServlet extends HttpServlet {
+ private static final long serialVersionUID = 6536175260540484539L;
+ private final static Log log = LogFactory.getLog(JcrReadServlet.class);
+
+ private final static String PARAM_VERBOSE = "verbose";
+ private final static String PARAM_DEPTH = "depth";
+
+ public final static String JCR_NODES = "jcr:nodes";
+ // cf. javax.jcr.Property
+ public final static String JCR_PATH = "path";
+ public final static String JCR_NAME = "name";
+// public final static String JCR_ID = "id";
+
+ final static String JCR_ = "jcr_";
+ final static String JCR_PREFIX = "jcr:";
+ final static String REP_PREFIX = "rep:";
+
+ private Repository repository;
+ private Integer maxDepth = 8;
+
+ private ObjectMapper objectMapper = new ObjectMapper();
+
+ @Override
+ protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+ if (log.isTraceEnabled())
+ log.trace("Data service: " + req.getPathInfo());
+
+ String dataWorkspace = getWorkspace(req);
+ String jcrPath = getJcrPath(req);
+
+ boolean verbose = req.getParameter(PARAM_VERBOSE) != null && !req.getParameter(PARAM_VERBOSE).equals("false");
+ int depth = 1;
+ if (req.getParameter(PARAM_DEPTH) != null) {
+ depth = Integer.parseInt(req.getParameter(PARAM_DEPTH));
+ if (depth > maxDepth)
+ throw new RuntimeException("Depth " + depth + " is higher than maximum " + maxDepth);
+ }
+
+ Session session = null;
+ try {
+ // authentication
+ session = openJcrSession(req, resp, getRepository(), dataWorkspace);
+ if (!session.itemExists(jcrPath))
+ throw new RuntimeException("JCR node " + jcrPath + " does not exist");
+ Node node = session.getNode(jcrPath);
+ if (node.isNodeType(NodeType.NT_FILE)) {
+ resp.setContentType("application/octet-stream");
+ resp.addHeader("Content-Disposition", "attachment; filename='" + node.getName() + "'");
+ IOUtils.copy(JcrUtils.getFileAsStream(node), resp.getOutputStream());
+ resp.flushBuffer();
+ } else {
+ resp.setContentType("application/json");
+ JsonGenerator jsonGenerator = getObjectMapper().getFactory().createGenerator(resp.getWriter());
+ jsonGenerator.writeStartObject();
+ writeNodeChildren(node, jsonGenerator, depth, verbose);
+ writeNodeProperties(node, jsonGenerator, verbose);
+ jsonGenerator.writeEndObject();
+ jsonGenerator.flush();
+ }
+ } catch (Exception e) {
+ new CmsExceptionsChain(e).writeAsJson(getObjectMapper(), resp);
+ } finally {
+ JcrUtils.logoutQuietly(session);
+ }
+ }
+
+ protected Session openJcrSession(HttpServletRequest req, HttpServletResponse resp, Repository repository,
+ String workspace) throws RepositoryException {
+ return workspace != null ? repository.login(workspace) : repository.login();
+ }
+
+ /**
+ * To be overridden.
+ *
+ * @return the workspace to use, or <code>null</code> if default should be used.
+ */
+ protected String getWorkspace(HttpServletRequest req) {
+ return null;
+ }
+
+ protected String getJcrPath(HttpServletRequest req) {
+ return req.getPathInfo();
+ }
+
+ protected void writeNodeProperties(Node node, JsonGenerator jsonGenerator, boolean verbose)
+ throws RepositoryException, IOException {
+ String jcrPath = node.getPath();
+// jsonGenerator.writeStringField(JCR_NAME, node.getName());
+// jsonGenerator.writeStringField(JCR_PATH, jcrPath);
+// // meta data
+// if (verbose) {
+// jsonGenerator.writeStringField(JCR_ID, node.getIdentifier());
+// }
+
+ Map<String, Map<String, Property>> namespaces = new TreeMap<>();
+
+ PropertyIterator pit = node.getProperties();
+ properties: while (pit.hasNext()) {
+ Property property = pit.nextProperty();
+
+ final String propertyName = property.getName();
+ int columnIndex = propertyName.indexOf(':');
+ if (columnIndex > 0) {
+ String prefix = propertyName.substring(0, columnIndex) + "_";
+ String unqualifiedName = propertyName.substring(columnIndex + 1);
+ if (!namespaces.containsKey(prefix))
+ namespaces.put(prefix, new LinkedHashMap<String, Property>());
+ Map<String, Property> map = namespaces.get(prefix);
+ assert !map.containsKey(unqualifiedName);
+ map.put(unqualifiedName, property);
+ continue properties;
+ }
+
+// String fieldName = property.getName();
+// switch (fieldName) {
+// case "jcr:title":
+// case "jcr:description":
+// case "jcr:created":
+// case "jcr:createdBy":
+// case "jcr:lastModified":
+// case "jcr:lastModifiedBy":
+// fieldName = fieldName.substring(JCR_PREFIX.length());
+// }
+//
+// if (!verbose) {
+//// if (property.getName().equals("jcr:primaryType") || property.getName().equals("jcr:mixinTypes")
+//// || property.getName().equals("jcr:created") || property.getName().equals("jcr:createdBy")
+//// || property.getName().equals("jcr:lastModified")
+//// || property.getName().equals("jcr:lastModifiedBy")) {
+//// continue properties;// skip
+//// }
+// if (fieldName.startsWith(JCR_PREFIX))
+// continue properties;
+// }
+
+ if (property.getType() == PropertyType.BINARY) {
+ if (!(node instanceof JackrabbitNode)) {
+ continue properties;// skip
+ }
+ }
+
+ writeProperty(propertyName, property, jsonGenerator);
+ }
+
+ for (String prefix : namespaces.keySet()) {
+ Map<String, Property> map = namespaces.get(prefix);
+ jsonGenerator.writeFieldName(prefix);
+ jsonGenerator.writeStartObject();
+ if (JCR_.equals(prefix)) {
+ jsonGenerator.writeStringField(JCR_NAME, node.getName());
+ jsonGenerator.writeStringField(JCR_PATH, jcrPath);
+// jsonGenerator.writeStringField(JCR_ID, node.getIdentifier());
+ }
+ properties: for (String unqualifiedName : map.keySet()) {
+ Property property = map.get(unqualifiedName);
+ if (property.getType() == PropertyType.BINARY) {
+ if (!(node instanceof JackrabbitNode)) {
+ continue properties;// skip
+ }
+ }
+ writeProperty(unqualifiedName, property, jsonGenerator);
+ }
+ jsonGenerator.writeEndObject();
+ }
+ }
+
+ protected void writeProperty(String fieldName, Property property, JsonGenerator jsonGenerator)
+ throws RepositoryException, IOException {
+ if (!property.isMultiple()) {
+ jsonGenerator.writeFieldName(fieldName);
+ writePropertyValue(property.getType(), property.getValue(), jsonGenerator);
+ } else {
+ jsonGenerator.writeFieldName(fieldName);
+ jsonGenerator.writeStartArray();
+ Value[] values = property.getValues();
+ for (Value value : values) {
+ writePropertyValue(property.getType(), value, jsonGenerator);
+ }
+ jsonGenerator.writeEndArray();
+ }
+ }
+
+ protected void writePropertyValue(int type, Value value, JsonGenerator jsonGenerator)
+ throws RepositoryException, IOException {
+ if (type == PropertyType.DOUBLE)
+ jsonGenerator.writeNumber(value.getDouble());
+ else if (type == PropertyType.LONG)
+ jsonGenerator.writeNumber(value.getLong());
+ else if (type == PropertyType.BINARY) {
+ if (value instanceof JackrabbitValue) {
+ String contentIdentity = ((JackrabbitValue) value).getContentIdentity();
+ jsonGenerator.writeString("SHA256:" + contentIdentity);
+ } else {
+ // TODO write Base64 ?
+ jsonGenerator.writeNull();
+ }
+ } else
+ jsonGenerator.writeString(value.getString());
+ }
+
+ protected void writeNodeChildren(Node node, JsonGenerator jsonGenerator, int depth, boolean verbose)
+ throws RepositoryException, IOException {
+ if (!node.hasNodes())
+ return;
+ if (depth <= 0)
+ return;
+ NodeIterator nit;
+
+ nit = node.getNodes();
+ children: while (nit.hasNext()) {
+ Node child = nit.nextNode();
+ if (!verbose && child.getName().startsWith(REP_PREFIX)) {
+ continue children;// skip Jackrabbit auth metadata
+ }
+
+ jsonGenerator.writeFieldName(child.getName());
+ jsonGenerator.writeStartObject();
+ writeNodeChildren(child, jsonGenerator, depth - 1, verbose);
+ writeNodeProperties(child, jsonGenerator, verbose);
+ jsonGenerator.writeEndObject();
+ }
+
+ // old
+// nit = node.getNodes();
+// jsonGenerator.writeFieldName(JcrServlet.JCR_NODES);
+// jsonGenerator.writeStartArray();
+// children: while (nit.hasNext()) {
+// Node child = nit.nextNode();
+//
+// if (child.getName().startsWith(REP_PREFIX)) {
+// continue children;// skip Jackrabbit auth metadata
+// }
+//
+// jsonGenerator.writeStartObject();
+// writeNodeProperties(child, jsonGenerator, verbose);
+// writeNodeChildren(child, jsonGenerator, depth - 1, verbose);
+// jsonGenerator.writeEndObject();
+// }
+// jsonGenerator.writeEndArray();
+ }
+
+ public void setRepository(Repository repository) {
+ this.repository = repository;
+ }
+
+ public void setMaxDepth(Integer maxDepth) {
+ this.maxDepth = maxDepth;
+ }
+
+ protected Repository getRepository() {
+ return repository;
+ }
+
+ protected ObjectMapper getObjectMapper() {
+ return objectMapper;
+ }
+
+}
projects / lgpl / argeo-commons.git / blobdiff