private boolean handleDelete(
      HttpServletRequest request, HttpServletResponse response, String pathString)
      throws GitAPIException, CoreException, IOException, ServletException {
    IPath path = pathString == null ? Path.EMPTY : new Path(pathString);
    // expected path format is /file/{workspaceId}/{projectId}[/{directoryPath}]
    if (path.segment(0).equals("file") && path.segmentCount() > 2) { // $NON-NLS-1$

      // make sure a clone is addressed
      WebProject webProject = GitUtils.projectFromPath(path);
      if (webProject != null && isAccessAllowed(request.getRemoteUser(), webProject)) {
        File gitDir = GitUtils.getGitDirs(path, Traverse.CURRENT).values().iterator().next();
        Repository repo = new FileRepository(gitDir);
        repo.close();
        FileUtils.delete(repo.getWorkTree(), FileUtils.RECURSIVE | FileUtils.RETRY);
        if (path.segmentCount() == 3)
          return statusHandler.handleRequest(
              request, response, removeProject(request.getRemoteUser(), webProject));
        return true;
      }
      String msg = NLS.bind("Nothing found for the given ID: {0}", path);
      return statusHandler.handleRequest(
          request,
          response,
          new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_NOT_FOUND, msg, null));
    }
    String msg = NLS.bind("Invalid delete request {0}", pathString);
    return statusHandler.handleRequest(
        request,
        response,
        new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_BAD_REQUEST, msg, null));
  }
  @Test
  public void testReadFileMetadata() throws Exception {
    String directoryPath = "sample/directory/path" + System.currentTimeMillis();
    createDirectory(directoryPath);
    String fileName = "sampleFile" + System.currentTimeMillis() + ".txt";
    String fileContent = "Sample File Cotnent " + System.currentTimeMillis();
    createFile(directoryPath + "/" + fileName, fileContent);

    WebRequest request = getGetFilesRequest(directoryPath + "/" + fileName + "?parts=meta");
    WebResponse response = webConversation.getResponse(request);
    assertEquals(HttpURLConnection.HTTP_OK, response.getResponseCode());
    JSONObject result = new JSONObject(response.getText());

    assertEquals(fileName, result.optString(ProtocolConstants.KEY_NAME));

    JSONArray parents = result.optJSONArray(ProtocolConstants.KEY_PARENTS);
    assertNotNull(parents);
    assertEquals(3, parents.length());
    IPath parentPath = new Path(directoryPath);
    // immediate parent
    JSONObject parent = parents.getJSONObject(0);
    assertEquals(parentPath.segment(2), parent.getString(ProtocolConstants.KEY_NAME));
    // grandparent
    parent = parents.getJSONObject(1);
    assertEquals(parentPath.segment(1), parent.getString(ProtocolConstants.KEY_NAME));

    // ensure all parent locations end with trailing slash
    for (int i = 0; i < parents.length(); i++) {
      parent = parents.getJSONObject(i);
      String location = parent.getString(ProtocolConstants.KEY_LOCATION);
      assertTrue(location.endsWith("/"));
      location = parent.getString(ProtocolConstants.KEY_CHILDREN_LOCATION);
      URI childrenLocation = new URI(location);
      assertTrue(childrenLocation.getPath().endsWith("/"));
    }
  }
 /**
  * Returns the preference node associated with this request. This method controls exactly what
  * preference nodes are exposed via this service. If there is no matching preference node for the
  * request, this method handles the appropriate response and returns <code>null</code>.
  *
  * @param req
  * @param resp
  * @param create If <code>true</code>, the node will be created if it does not already exist. If
  *     <code>false</code>, this method sets the response status to 404 and returns null.
  */
 private IEclipsePreferences getNode(
     HttpServletRequest req, HttpServletResponse resp, boolean create) throws ServletException {
   if (prefRoot == null) {
     handleException(resp, "Unable to obtain preference service", null);
     return null;
   }
   String pathString = req.getPathInfo();
   if (pathString == null) pathString = ""; // $NON-NLS-1$
   IPath path = new Path(pathString);
   int segmentCount = path.segmentCount();
   String scope = path.segment(0);
   // note that the preference service API scope names don't match those used in our persistence
   // layer.
   IPath nodePath = null;
   if ("user".equalsIgnoreCase(scope)) { // $NON-NLS-1$
     String username = req.getRemoteUser();
     if (username == null) {
       resp.setStatus(HttpServletResponse.SC_FORBIDDEN);
       return null;
     }
     nodePath = new Path("Users").append(username); // $NON-NLS-1$
   } else if ("workspace".equalsIgnoreCase(scope) && segmentCount > 1) { // $NON-NLS-1$
     nodePath = new Path("Workspaces"); // $NON-NLS-1$
   } else if ("project".equalsIgnoreCase(scope) && segmentCount > 1) { // $NON-NLS-1$
     nodePath = new Path("Projects"); // $NON-NLS-1$
   } else {
     // invalid prefix
     handleNotFound(req, resp, HttpServletResponse.SC_METHOD_NOT_ALLOWED);
     return null;
   }
   // we allow arbitrary subtrees beneath our three supported roots
   if (nodePath != null) {
     String childPath = nodePath.append(path.removeFirstSegments(1)).toString();
     try {
       if (create || prefRoot.nodeExists(childPath))
         return (IEclipsePreferences) prefRoot.node(childPath);
     } catch (BackingStoreException e) {
       String msg = NLS.bind("Error retrieving preferences for path {0}", pathString);
       handleException(
           resp,
           new Status(IStatus.ERROR, Activator.PI_SERVER_SERVLETS, msg),
           HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
       return null;
     }
   }
   handleNotFound(req, resp, HttpServletResponse.SC_NOT_FOUND);
   return null;
 }
  private boolean handlePost(
      HttpServletRequest request, HttpServletResponse response, String pathString)
      throws IOException, JSONException, ServletException, URISyntaxException, CoreException,
          NoHeadException, NoMessageException, ConcurrentRefUpdateException,
          WrongRepositoryStateException {
    // make sure required fields are set
    JSONObject toAdd = OrionServlet.readJSONRequest(request);
    if (toAdd.optBoolean(GitConstants.KEY_PULL, false)) {
      GitUtils.createGitCredentialsProvider(toAdd);
      GitCredentialsProvider cp = GitUtils.createGitCredentialsProvider(toAdd);
      boolean force = toAdd.optBoolean(GitConstants.KEY_FORCE, false);
      return pull(request, response, cp, pathString, force);
    }

    Clone clone = new Clone();
    String url = toAdd.optString(GitConstants.KEY_URL, null);
    // method handles repository clone or just repository init
    // decision is based on existence of GitUrl argument
    boolean initOnly;
    if (url == null || url.isEmpty()) initOnly = true;
    else {
      initOnly = false;
      if (!validateCloneUrl(url, request, response)) return true;
      clone.setUrl(new URIish(url));
    }
    String cloneName = toAdd.optString(ProtocolConstants.KEY_NAME, null);
    if (cloneName == null) cloneName = request.getHeader(ProtocolConstants.HEADER_SLUG);
    // expected path /workspace/{workspaceId}
    String workspacePath = toAdd.optString(ProtocolConstants.KEY_LOCATION, null);
    // expected path /file/{workspaceId}/{projectName}[/{path}]
    String filePathString = toAdd.optString(ProtocolConstants.KEY_PATH, null);
    IPath filePath = filePathString == null ? null : new Path(filePathString);
    if (filePath != null && filePath.segmentCount() < 3) filePath = null;
    if (filePath == null && workspacePath == null) {
      String msg =
          NLS.bind(
              "Either {0} or {1} should be provided: {2}",
              new Object[] {ProtocolConstants.KEY_PATH, ProtocolConstants.KEY_LOCATION, toAdd});
      return statusHandler.handleRequest(
          request,
          response,
          new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_BAD_REQUEST, msg, null));
    }
    // only during init operation filePath or cloneName must be provided
    // during clone operation, name can be obtained from URL
    if (initOnly && filePath == null && cloneName == null) {
      String msg =
          NLS.bind(
              "Either {0} or {1} should be provided: {2}",
              new Object[] {ProtocolConstants.KEY_PATH, GitConstants.KEY_NAME, toAdd});
      return statusHandler.handleRequest(
          request,
          response,
          new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_BAD_REQUEST, msg, null));
    }
    if (!validateCloneName(cloneName, request, response)) return true;

    // prepare the WebClone object, create a new project if necessary
    WebProject webProject = null;
    boolean webProjectExists = false;
    if (filePath != null) {
      // path format is /file/{workspaceId}/{projectName}/[filePath]
      clone.setId(filePath.toString());
      webProject = GitUtils.projectFromPath(filePath);
      // workspace path format needs to be used if project does not exist
      if (webProject == null) {
        String msg = NLS.bind("Specified project does not exist: {0}", filePath.segment(2));
        return statusHandler.handleRequest(
            request,
            response,
            new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_BAD_REQUEST, msg, null));
      }
      webProjectExists = true;
      clone.setContentLocation(
          webProject.getProjectStore().getFileStore(filePath.removeFirstSegments(3)).toURI());
      if (cloneName == null)
        cloneName = filePath.segmentCount() > 2 ? filePath.lastSegment() : webProject.getName();
    } else if (workspacePath != null) {
      IPath path = new Path(workspacePath);
      // TODO: move this to CloneJob
      // if so, modify init part to create a new project if necessary
      WebWorkspace workspace = WebWorkspace.fromId(path.segment(1));
      String id = WebProject.nextProjectId();
      if (cloneName == null) cloneName = new URIish(url).getHumanishName();
      cloneName = getUniqueProjectName(workspace, cloneName);
      webProjectExists = false;
      webProject = WebProject.fromId(id);
      webProject.setName(cloneName);

      try {
        WorkspaceResourceHandler.computeProjectLocation(request, webProject, null, false);
      } catch (CoreException e) {
        // we are unable to write in the platform location!
        String msg =
            NLS.bind(
                "Server content location could not be written: {0}",
                Activator.getDefault().getRootLocationURI());
        return statusHandler.handleRequest(
            request,
            response,
            new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_INTERNAL_SERVER_ERROR, msg, e));
      } catch (URISyntaxException e) {
        // should not happen, we do not allow linking at this point
      }

      try {
        // If all went well, add project to workspace
        WorkspaceResourceHandler.addProject(request.getRemoteUser(), workspace, webProject);
      } catch (CoreException e) {
        return statusHandler.handleRequest(
            request,
            response,
            new ServerStatus(
                IStatus.ERROR,
                HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
                "Error persisting project state",
                e));
      }

      URI baseLocation = getURI(request);
      baseLocation =
          new URI(
              baseLocation.getScheme(),
              baseLocation.getUserInfo(),
              baseLocation.getHost(),
              baseLocation.getPort(),
              workspacePath,
              baseLocation.getQuery(),
              baseLocation.getFragment());
      clone.setId(GitUtils.pathFromProject(workspace, webProject).toString());
      clone.setContentLocation(webProject.getProjectStore().toURI());
    }
    clone.setName(cloneName);
    clone.setBaseLocation(getURI(request));
    JSONObject cloneObject = clone.toJSON();
    String cloneLocation = cloneObject.getString(ProtocolConstants.KEY_LOCATION);

    if (initOnly) {
      // git init
      InitJob job =
          new InitJob(
              clone, TaskJobHandler.getUserId(request), request.getRemoteUser(), cloneLocation);
      return TaskJobHandler.handleTaskJob(request, response, job, statusHandler);
    }
    // git clone
    // prepare creds
    GitCredentialsProvider cp = GitUtils.createGitCredentialsProvider(toAdd);
    cp.setUri(new URIish(clone.getUrl()));

    // if all went well, clone
    CloneJob job =
        new CloneJob(
            clone,
            TaskJobHandler.getUserId(request),
            cp,
            request.getRemoteUser(),
            cloneLocation,
            webProjectExists
                ? null
                : webProject /* used for cleaning up, so null when not needed */);
    return TaskJobHandler.handleTaskJob(request, response, job, statusHandler);
  }
  private boolean handlePut(
      HttpServletRequest request, HttpServletResponse response, String pathString)
      throws GitAPIException, CoreException, IOException, JSONException, ServletException {
    IPath path = pathString == null ? Path.EMPTY : new Path(pathString);
    if (path.segment(0).equals("file") && path.segmentCount() > 1) { // $NON-NLS-1$

      // make sure a clone is addressed
      WebProject webProject = GitUtils.projectFromPath(path);
      if (isAccessAllowed(request.getRemoteUser(), webProject)) {
        Map<IPath, File> gitDirs = GitUtils.getGitDirs(path, Traverse.CURRENT);
        if (gitDirs.isEmpty()) {
          String msg = NLS.bind("Request path is not a git repository: {0}", path);
          return statusHandler.handleRequest(
              request,
              response,
              new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_BAD_REQUEST, msg, null));
        }
        File gitDir = gitDirs.values().iterator().next();

        // make sure required fields are set
        JSONObject toCheckout = OrionServlet.readJSONRequest(request);
        JSONArray paths = toCheckout.optJSONArray(ProtocolConstants.KEY_PATH);
        String branch = toCheckout.optString(GitConstants.KEY_BRANCH_NAME, null);
        String tag = toCheckout.optString(GitConstants.KEY_TAG_NAME, null);
        boolean removeUntracked = toCheckout.optBoolean(GitConstants.KEY_REMOVE_UNTRACKED, false);
        if ((paths == null || paths.length() == 0) && branch == null && tag == null) {
          String msg =
              NLS.bind(
                  "Either '{0}' or '{1}' or '{2}' should be provided, got: {3}",
                  new Object[] {
                    ProtocolConstants.KEY_PATH,
                    GitConstants.KEY_BRANCH_NAME,
                    GitConstants.KEY_TAG_NAME,
                    toCheckout
                  });
          return statusHandler.handleRequest(
              request,
              response,
              new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_BAD_REQUEST, msg, null));
        }

        Git git = new Git(new FileRepository(gitDir));
        if (paths != null) {
          Set<String> toRemove = new HashSet<String>();
          CheckoutCommand checkout = git.checkout();
          for (int i = 0; i < paths.length(); i++) {
            String p = paths.getString(i);
            if (removeUntracked && !isInIndex(git.getRepository(), p)) toRemove.add(p);
            checkout.addPath(p);
          }
          checkout.call();
          for (String p : toRemove) {
            File f = new File(git.getRepository().getWorkTree(), p);
            f.delete();
          }
          return true;
        } else if (tag != null && branch != null) {
          CheckoutCommand co = git.checkout();
          try {
            co.setName(branch).setStartPoint(tag).setCreateBranch(true).call();
            return true;
          } catch (RefNotFoundException e) {
            String msg = NLS.bind("Tag not found: {0}", tag);
            return statusHandler.handleRequest(
                request,
                response,
                new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_NOT_FOUND, msg, e));
          } catch (GitAPIException e) {
            if (org.eclipse.jgit.api.CheckoutResult.Status.CONFLICTS.equals(
                co.getResult().getStatus())) {
              return statusHandler.handleRequest(
                  request,
                  response,
                  new ServerStatus(
                      IStatus.ERROR, HttpServletResponse.SC_CONFLICT, "Checkout aborted.", e));
            }
            // TODO: handle other exceptions
          }
        } else if (branch != null) {

          if (!isLocalBranch(git, branch)) {
            String msg = NLS.bind("{0} is not a branch.", branch);
            return statusHandler.handleRequest(
                request,
                response,
                new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_NOT_FOUND, msg, null));
          }

          CheckoutCommand co = git.checkout();
          try {
            co.setName(Constants.R_HEADS + branch).call();
            return true;
          } catch (CheckoutConflictException e) {
            return statusHandler.handleRequest(
                request,
                response,
                new ServerStatus(
                    IStatus.ERROR, HttpServletResponse.SC_CONFLICT, "Checkout aborted.", e));
          } catch (RefNotFoundException e) {
            String msg = NLS.bind("Branch name not found: {0}", branch);
            return statusHandler.handleRequest(
                request,
                response,
                new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_NOT_FOUND, msg, e));
          } // TODO: handle other exceptions
        }
      } else {
        String msg = NLS.bind("Nothing found for the given ID: {0}", path);
        return statusHandler.handleRequest(
            request,
            response,
            new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_NOT_FOUND, msg, null));
      }
    }
    String msg = NLS.bind("Invalid checkout request {0}", pathString);
    return statusHandler.handleRequest(
        request,
        response,
        new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_BAD_REQUEST, msg, null));
  }
 private boolean handleGet(
     HttpServletRequest request, HttpServletResponse response, String pathString)
     throws IOException, JSONException, ServletException, URISyntaxException, CoreException {
   IPath path = pathString == null ? Path.EMPTY : new Path(pathString);
   URI baseLocation = getURI(request);
   String user = request.getRemoteUser();
   // expected path format is 'workspace/{workspaceId}' or
   // 'file/{workspaceId}/{projectName}/{path}]'
   if ("workspace".equals(path.segment(0)) && path.segmentCount() == 2) { // $NON-NLS-1$
     // all clones in the workspace
     if (WebWorkspace.exists(path.segment(1))) {
       WebWorkspace workspace = WebWorkspace.fromId(path.segment(1));
       JSONObject result = new JSONObject();
       JSONArray children = new JSONArray();
       for (WebProject webProject : workspace.getProjects()) {
         // this is the location of the project metadata
         if (isAccessAllowed(user, webProject)) {
           IPath projectPath = GitUtils.pathFromProject(workspace, webProject);
           Map<IPath, File> gitDirs = GitUtils.getGitDirs(projectPath, Traverse.GO_DOWN);
           for (Map.Entry<IPath, File> entry : gitDirs.entrySet()) {
             children.put(new Clone().toJSON(entry, baseLocation));
           }
         }
       }
       result.put(ProtocolConstants.KEY_TYPE, Clone.TYPE);
       result.put(ProtocolConstants.KEY_CHILDREN, children);
       OrionServlet.writeJSONResponse(request, response, result);
       return true;
     }
     String msg = NLS.bind("Nothing found for the given ID: {0}", path);
     return statusHandler.handleRequest(
         request,
         response,
         new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_NOT_FOUND, msg, null));
   } else if ("file".equals(path.segment(0)) && path.segmentCount() > 1) { // $NON-NLS-1$
     // clones under given path
     WebProject webProject = GitUtils.projectFromPath(path);
     IPath projectRelativePath = path.removeFirstSegments(3);
     if (webProject != null
         && isAccessAllowed(user, webProject)
         && webProject.getProjectStore().getFileStore(projectRelativePath).fetchInfo().exists()) {
       Map<IPath, File> gitDirs = GitUtils.getGitDirs(path, Traverse.GO_DOWN);
       JSONObject result = new JSONObject();
       JSONArray children = new JSONArray();
       for (Map.Entry<IPath, File> entry : gitDirs.entrySet()) {
         children.put(new Clone().toJSON(entry, baseLocation));
       }
       result.put(ProtocolConstants.KEY_TYPE, Clone.TYPE);
       result.put(ProtocolConstants.KEY_CHILDREN, children);
       OrionServlet.writeJSONResponse(request, response, result);
       return true;
     }
     String msg = NLS.bind("Nothing found for the given ID: {0}", path);
     return statusHandler.handleRequest(
         request,
         response,
         new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_NOT_FOUND, msg, null));
   }
   // else the request is malformed
   String msg = NLS.bind("Invalid clone request: {0}", path);
   return statusHandler.handleRequest(
       request,
       response,
       new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_BAD_REQUEST, msg, null));
 }