GUACAMOLE-462: Allow logs associated with history entries to be retrieved via REST.

guacamole/src/main/java/org/apache/guacamole/rest/history/ActivityLogResource.java

@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.guacamole.rest.history;
+
+import javax.ws.rs.GET;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.ResponseBuilder;
+import org.apache.guacamole.GuacamoleException;
+import org.apache.guacamole.net.auth.ActivityLog;
+
+/**
+ * A REST resource which exposes the contents of a given ActivityLog.
+ */
+public class ActivityLogResource {
+
+    /**
+     * The ActivityLog whose contents are being exposed.
+     */
+    private final ActivityLog log;
+
+    /**
+     * Creates a new ActivityLogResource which exposes the records within the
+     * given ActivityLog.
+     *
+     * @param log
+     *     The ActivityLog whose contents should be exposed.
+     */
+    public ActivityLogResource(ActivityLog log) {
+        this.log = log;
+    }
+
+    /**
+     * Returns the raw contents of the underlying ActivityLog. If the size of
+     * the ActivityLog is known, this size is included as the "Content-Length"
+     * of the response.
+     *
+     * @return
+     *     A Response containing the raw contents of the underlying
+     *     ActivityLog.
+     *
+     * @throws GuacamoleException
+     *     If an error prevents retrieving the content of the log or its size.
+     */
+    @GET
+    public Response getContents() throws GuacamoleException {
+
+        // Build base response exposing the raw contents of the underlying log
+        ResponseBuilder response = Response.ok(log.getContent(),
+                log.getType().getContentType());
+
+        // Include size, if known
+        long size = log.getSize();
+        if (size >= 0)
+            response.header("Content-Length", size);
+
+        return response.build();
+
+    }
+
+}

guacamole/src/main/java/org/apache/guacamole/rest/history/ActivityRecordResource.java

@@ -0,0 +1,82 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.guacamole.rest.history;
+
+import javax.ws.rs.Consumes;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+import org.apache.guacamole.GuacamoleException;
+import org.apache.guacamole.GuacamoleResourceNotFoundException;
+import org.apache.guacamole.net.auth.ActivityLog;
+import org.apache.guacamole.net.auth.ActivityRecord;
+
+/**
+ * A REST resource which exposes a single ActivityRecord, allowing any
+ * associated and accessible logs to be retrieved.
+ */
+@Produces(MediaType.APPLICATION_JSON)
+@Consumes(MediaType.APPLICATION_JSON)
+public class ActivityRecordResource {
+
+    /**
+     * The ActivityRecord being exposed.
+     */
+    private final ActivityRecord record;
+
+    /**
+     * Creates a new ActivityRecordResource which exposes the given record.
+     *
+     * @param record
+     *     The ActivityRecord that should be exposed.
+     */
+    public ActivityRecordResource(ActivityRecord record) {
+        this.record = record;
+    }
+
+    /**
+     * Returns an ActivityLogResource representing the log associated with the
+     * underlying ActivityRecord and having the given name. If no such log
+     * can be retrieved, either because it does not exist or the current user
+     * does not have access, an exception is thrown.
+     *
+     * @param logName
+     *     The unique name of the log to retrieve.
+     *
+     * @return
+     *     An ActivityLogResource representing the log having the given name.
+     *
+     * @throws GuacamoleException
+     *     If no such log can be retrieved.
+     */
+    @Path("logs/{name}")
+    public ActivityLogResource getLog(@PathParam("name") String logName)
+            throws GuacamoleException {
+
+        ActivityLog log = record.getLogs().get(logName);
+        if (log != null)
+            return new ActivityLogResource(log);
+
+        throw new GuacamoleResourceNotFoundException("No such log.");
+
+    }
+
+}

guacamole/src/main/java/org/apache/guacamole/rest/history/ActivityRecordSetResource.java

@@ -21,12 +21,17 @@ package org.apache.guacamole.rest.history;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.UUID;
 import javax.ws.rs.Consumes;
 import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
 import javax.ws.rs.QueryParam;
 import javax.ws.rs.core.MediaType;
+import org.apache.guacamole.GuacamoleClientException;
 import org.apache.guacamole.GuacamoleException;
+import org.apache.guacamole.GuacamoleResourceNotFoundException;
 import org.apache.guacamole.net.auth.ActivityRecord;
 import org.apache.guacamole.net.auth.ActivityRecordSet;
 
@@ -86,6 +91,45 @@ public abstract class ActivityRecordSetResource<InternalRecordType extends Activ
      */
     protected abstract ExternalRecordType toExternalRecord(InternalRecordType record);
 
+    /**
+     * Applies the given search and sorting criteria to the ActivityRecordSet
+     * exposed by this ActivityRecordSetResource. The ActivityRecordSet stored
+     * as {@link #history} is modified as a result of this call.
+     *
+     * @param requiredContents
+     *     The set of strings that each must occur somewhere within the
+     *     returned records, whether within the associated username,
+     *     the name of some associated object (such as a connection), or any
+     *     associated date. If non-empty, any record not matching each of the
+     *     strings within the collection will be excluded from the results.
+     *
+     * @param sortPredicates
+     *     A list of predicates to apply while sorting the resulting records,
+     *     describing the properties involved and the sort order for those
+     *     properties.
+     *
+     * @throws GuacamoleException
+     *     If an error occurs while applying the given filter criteria or
+     *     sort predicates.
+     */
+    private void applyCriteria(List<String> requiredContents,
+            List<APISortPredicate> sortPredicates) throws GuacamoleException {
+
+        // Restrict to records which contain the specified strings
+        for (String required : requiredContents) {
+            if (!required.isEmpty())
+                history = history.contains(required);
+        }
+
+        // Sort according to specified ordering
+        for (APISortPredicate predicate : sortPredicates)
+            history = history.sort(predicate.getProperty(), predicate.isDescending());
+
+        // Limit to maximum result size
+        history = history.limit(MAXIMUM_HISTORY_SIZE);
+
+    }
+
     /**
      * Retrieves the list of activity records stored within the underlying
      * ActivityRecordSet which match the given, arbitrary criteria. If
@@ -118,18 +162,8 @@ public abstract class ActivityRecordSetResource<InternalRecordType extends Activ
             @QueryParam("order") List<APISortPredicate> sortPredicates)
             throws GuacamoleException {
 
-        // Restrict to records which contain the specified strings
+        // Apply search/sort criteria
-        for (String required : requiredContents) {
+        applyCriteria(requiredContents, sortPredicates);
-            if (!required.isEmpty())
-                history = history.contains(required);
-        }
-
-        // Sort according to specified ordering
-        for (APISortPredicate predicate : sortPredicates)
-            history = history.sort(predicate.getProperty(), predicate.isDescending());
-
-        // Limit to maximum result size
-        history = history.limit(MAXIMUM_HISTORY_SIZE);
         
         // Convert record set to collection of API records
         List<ExternalRecordType> apiRecords = new ArrayList<>();
@@ -141,4 +175,72 @@ public abstract class ActivityRecordSetResource<InternalRecordType extends Activ
 
     }
 
+    /**
+     * Retrieves record having the given UUID from among the list of activity
+     * records stored within the underlying ActivityRecordSet which match the
+     * given, arbitrary criteria. If specified, the returned records will also
+     * be sorted according to the given sort predicates. As the number of
+     * activity records retrieved at any given time may be limited by the
+     * extension providing those records, the sorting and search criteria may
+     * impact whether the record having a particular UUID can be located, even
+     * if it is known that the record exists.
+     *
+     * @param uuid
+     *     The UUID of the record to retrieve.
+     *
+     * @param requiredContents
+     *     The set of strings that each must occur somewhere within the
+     *     relevant records, whether within the associated username,
+     *     the name of some associated object (such as a connection), or any
+     *     associated date. If non-empty, any record not matching each of the
+     *     strings within the collection will not be considered.
+     *
+     * @param sortPredicates
+     *     A list of predicates to apply while sorting the relevant records,
+     *     describing the properties involved and the sort order for those
+     *     properties.
+     *
+     * @return
+     *     The record having the given UUID which matches the provided
+     *     criteria.
+     *
+     * @throws GuacamoleException
+     *     If an error occurs while applying the given filter criteria or
+     *     sort predicates, or if the requested record cannot be found.
+     */
+    @Path("{uuid}")
+    public ActivityRecordResource getRecord(@PathParam("uuid") String uuid,
+            @QueryParam("contains") List<String> requiredContents,
+            @QueryParam("order") List<APISortPredicate> sortPredicates)
+            throws GuacamoleException {
+
+        // Parse UUID from provided string
+        UUID parsedUUID;
+        try {
+            parsedUUID = UUID.fromString(uuid);
+        }
+        catch (IllegalArgumentException e) {
+            throw new GuacamoleClientException("Invalid UUID.", e);
+        }
+
+        // Apply search/sort criteria
+        applyCriteria(requiredContents, sortPredicates);
+        
+        // Locate record having given UUID among all visible records
+        for (InternalRecordType record : history.asCollection()) {
+
+            // Ignore records lacking any UUID
+            UUID recordUUID = record.getUUID();
+            if (recordUUID == null)
+                continue;
+
+            if (recordUUID.equals(parsedUUID))
+                return new ActivityRecordResource(record);
+
+        }
+
+        throw new GuacamoleResourceNotFoundException("No such history entry.");
+
+    }
+
 }