Examples with RestCollection com.google.gerrit.extensions.restapi.RestCollection used on opensource projects

Example 1 with RestCollection

use of com.google.gerrit.extensions.restapi.RestCollection in project gerrit by GerritCodeReview.

the class RestApiServlet method service.

@Override
protected final void service(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
    final long startNanos = System.nanoTime();
    long auditStartTs = TimeUtil.nowMs();
    res.setHeader("Content-Disposition", "attachment");
    res.setHeader("X-Content-Type-Options", "nosniff");
    int statusCode = SC_OK;
    long responseBytes = -1;
    Optional<Exception> cause = Optional.empty();
    Response<?> response = null;
    QueryParams qp = null;
    Object inputRequestBody = null;
    RestResource rsrc = TopLevelResource.INSTANCE;
    ViewData viewData = null;
    try (TraceContext traceContext = enableTracing(req, res)) {
        String requestUri = requestUri(req);
        try (PerThreadCache ignored = PerThreadCache.create()) {
            List<IdString> path = splitPath(req);
            RequestInfo requestInfo = createRequestInfo(traceContext, requestUri, path);
            globals.requestListeners.runEach(l -> l.onRequest(requestInfo));
            // TraceIT#performanceLoggingForRestCall()).
            try (RequestStateContext requestStateContext = RequestStateContext.open().addRequestStateProvider(globals.deadlineCheckerFactory.create(requestInfo, req.getHeader(X_GERRIT_DEADLINE)));
                PerformanceLogContext performanceLogContext = new PerformanceLogContext(globals.config, globals.performanceLoggers)) {
                traceRequestData(req);
                if (isCorsPreflight(req)) {
                    doCorsPreflight(req, res);
                    return;
                }
                qp = ParameterParser.getQueryParams(req);
                checkCors(req, res, qp.hasXdOverride());
                if (qp.hasXdOverride()) {
                    req = applyXdOverrides(req, qp);
                }
                checkUserSession(req);
                RestCollection<RestResource, RestResource> rc = members.get();
                globals.permissionBackend.currentUser().checkAny(GlobalPermission.fromAnnotation(rc.getClass()));
                viewData = new ViewData(null, null);
                if (path.isEmpty()) {
                    globals.quotaChecker.enforce(req);
                    if (rc instanceof NeedsParams) {
                        ((NeedsParams) rc).setParams(qp.params());
                    }
                    if (isRead(req)) {
                        viewData = new ViewData(null, rc.list());
                    } else if (isPost(req)) {
                        RestView<RestResource> restCollectionView = rc.views().get(PluginName.GERRIT, "POST_ON_COLLECTION./");
                        if (restCollectionView != null) {
                            viewData = new ViewData(null, restCollectionView);
                        } else {
                            throw methodNotAllowed(req);
                        }
                    } else {
                        // DELETE on root collections is not supported
                        throw methodNotAllowed(req);
                    }
                } else {
                    IdString id = path.remove(0);
                    try {
                        rsrc = parseResourceWithRetry(req, traceContext, viewData.pluginName, rc, rsrc, id);
                        globals.quotaChecker.enforce(rsrc, req);
                        if (path.isEmpty()) {
                            checkPreconditions(req);
                        }
                    } catch (ResourceNotFoundException e) {
                        if (!path.isEmpty()) {
                            throw e;
                        }
                        globals.quotaChecker.enforce(req);
                        if (isPost(req) || isPut(req)) {
                            RestView<RestResource> createView = rc.views().get(PluginName.GERRIT, "CREATE./");
                            if (createView != null) {
                                viewData = new ViewData(null, createView);
                                path.add(id);
                            } else {
                                throw e;
                            }
                        } else if (isDelete(req)) {
                            RestView<RestResource> deleteView = rc.views().get(PluginName.GERRIT, "DELETE_MISSING./");
                            if (deleteView != null) {
                                viewData = new ViewData(null, deleteView);
                                path.add(id);
                            } else {
                                throw e;
                            }
                        } else {
                            throw e;
                        }
                    }
                    if (viewData.view == null) {
                        viewData = view(rc, req.getMethod(), path);
                    }
                }
                checkRequiresCapability(viewData);
                while (viewData.view instanceof RestCollection<?, ?>) {
                    @SuppressWarnings("unchecked") RestCollection<RestResource, RestResource> c = (RestCollection<RestResource, RestResource>) viewData.view;
                    if (path.isEmpty()) {
                        if (isRead(req)) {
                            viewData = new ViewData(null, c.list());
                        } else if (isPost(req)) {
                            // TODO: Here and on other collection methods: There is a bug that binds child views
                            // with pluginName="gerrit" instead of the real plugin name. This has never worked
                            // correctly and should be fixed where the binding gets created (DynamicMapProvider)
                            // and here.
                            RestView<RestResource> restCollectionView = c.views().get(PluginName.GERRIT, "POST_ON_COLLECTION./");
                            if (restCollectionView != null) {
                                viewData = new ViewData(null, restCollectionView);
                            } else {
                                throw methodNotAllowed(req);
                            }
                        } else if (isDelete(req)) {
                            RestView<RestResource> restCollectionView = c.views().get(PluginName.GERRIT, "DELETE_ON_COLLECTION./");
                            if (restCollectionView != null) {
                                viewData = new ViewData(null, restCollectionView);
                            } else {
                                throw methodNotAllowed(req);
                            }
                        } else {
                            throw methodNotAllowed(req);
                        }
                        break;
                    }
                    IdString id = path.remove(0);
                    try {
                        rsrc = parseResourceWithRetry(req, traceContext, viewData.pluginName, c, rsrc, id);
                        checkPreconditions(req);
                        viewData = new ViewData(null, null);
                    } catch (ResourceNotFoundException e) {
                        if (!path.isEmpty()) {
                            throw e;
                        }
                        if (isPost(req) || isPut(req)) {
                            RestView<RestResource> createView = c.views().get(PluginName.GERRIT, "CREATE./");
                            if (createView != null) {
                                viewData = new ViewData(viewData.pluginName, createView);
                                path.add(id);
                            } else {
                                throw e;
                            }
                        } else if (isDelete(req)) {
                            RestView<RestResource> deleteView = c.views().get(PluginName.GERRIT, "DELETE_MISSING./");
                            if (deleteView != null) {
                                viewData = new ViewData(viewData.pluginName, deleteView);
                                path.add(id);
                            } else {
                                throw e;
                            }
                        } else {
                            throw e;
                        }
                    }
                    if (viewData.view == null) {
                        viewData = view(c, req.getMethod(), path);
                    }
                    checkRequiresCapability(viewData);
                }
                if (notModified(req, traceContext, viewData, rsrc)) {
                    logger.atFinest().log("REST call succeeded: %d", SC_NOT_MODIFIED);
                    res.sendError(SC_NOT_MODIFIED);
                    return;
                }
                try (DynamicOptions pluginOptions = new DynamicOptions(globals.injector, globals.dynamicBeans)) {
                    if (!globals.paramParser.get().parse(viewData.view, pluginOptions, qp.params(), req, res)) {
                        return;
                    }
                    if (viewData.view instanceof RestReadView<?> && isRead(req)) {
                        response = invokeRestReadViewWithRetry(req, traceContext, viewData, (RestReadView<RestResource>) viewData.view, rsrc);
                    } else if (viewData.view instanceof RestModifyView<?, ?>) {
                        @SuppressWarnings("unchecked") RestModifyView<RestResource, Object> m = (RestModifyView<RestResource, Object>) viewData.view;
                        Type type = inputType(m);
                        inputRequestBody = parseRequest(req, type);
                        response = invokeRestModifyViewWithRetry(req, traceContext, viewData, m, rsrc, inputRequestBody);
                        if (inputRequestBody instanceof RawInput) {
                            try (InputStream is = req.getInputStream()) {
                                ServletUtils.consumeRequestBody(is);
                            }
                        }
                    } else if (viewData.view instanceof RestCollectionCreateView<?, ?, ?>) {
                        @SuppressWarnings("unchecked") RestCollectionCreateView<RestResource, RestResource, Object> m = (RestCollectionCreateView<RestResource, RestResource, Object>) viewData.view;
                        Type type = inputType(m);
                        inputRequestBody = parseRequest(req, type);
                        response = invokeRestCollectionCreateViewWithRetry(req, traceContext, viewData, m, rsrc, path.get(0), inputRequestBody);
                        if (inputRequestBody instanceof RawInput) {
                            try (InputStream is = req.getInputStream()) {
                                ServletUtils.consumeRequestBody(is);
                            }
                        }
                    } else if (viewData.view instanceof RestCollectionDeleteMissingView<?, ?, ?>) {
                        @SuppressWarnings("unchecked") RestCollectionDeleteMissingView<RestResource, RestResource, Object> m = (RestCollectionDeleteMissingView<RestResource, RestResource, Object>) viewData.view;
                        Type type = inputType(m);
                        inputRequestBody = parseRequest(req, type);
                        response = invokeRestCollectionDeleteMissingViewWithRetry(req, traceContext, viewData, m, rsrc, path.get(0), inputRequestBody);
                        if (inputRequestBody instanceof RawInput) {
                            try (InputStream is = req.getInputStream()) {
                                ServletUtils.consumeRequestBody(is);
                            }
                        }
                    } else if (viewData.view instanceof RestCollectionModifyView<?, ?, ?>) {
                        @SuppressWarnings("unchecked") RestCollectionModifyView<RestResource, RestResource, Object> m = (RestCollectionModifyView<RestResource, RestResource, Object>) viewData.view;
                        Type type = inputType(m);
                        inputRequestBody = parseRequest(req, type);
                        response = invokeRestCollectionModifyViewWithRetry(req, traceContext, viewData, m, rsrc, inputRequestBody);
                        if (inputRequestBody instanceof RawInput) {
                            try (InputStream is = req.getInputStream()) {
                                ServletUtils.consumeRequestBody(is);
                            }
                        }
                    } else {
                        throw new ResourceNotFoundException();
                    }
                    String isUpdatedRefEnabled = req.getHeader(X_GERRIT_UPDATED_REF_ENABLED);
                    if (!Strings.isNullOrEmpty(isUpdatedRefEnabled) && Boolean.valueOf(isUpdatedRefEnabled)) {
                        setXGerritUpdatedRefResponseHeaders(req, res);
                    }
                    if (response instanceof Response.Redirect) {
                        CacheHeaders.setNotCacheable(res);
                        String location = ((Response.Redirect) response).location();
                        res.sendRedirect(location);
                        logger.atFinest().log("REST call redirected to: %s", location);
                        return;
                    } else if (response instanceof Response.Accepted) {
                        CacheHeaders.setNotCacheable(res);
                        res.setStatus(response.statusCode());
                        res.setHeader(HttpHeaders.LOCATION, ((Response.Accepted) response).location());
                        logger.atFinest().log("REST call succeeded: %d", response.statusCode());
                        return;
                    }
                    statusCode = response.statusCode();
                    configureCaching(req, res, traceContext, rsrc, viewData, response.caching());
                    res.setStatus(statusCode);
                    logger.atFinest().log("REST call succeeded: %d", statusCode);
                }
                if (response != Response.none()) {
                    Object value = Response.unwrap(response);
                    if (value instanceof BinaryResult) {
                        responseBytes = replyBinaryResult(req, res, (BinaryResult) value);
                    } else {
                        responseBytes = replyJson(req, res, false, qp.config(), value);
                    }
                }
            }
        } catch (MalformedJsonException | JsonParseException e) {
            cause = Optional.of(e);
            logger.atFine().withCause(e).log("REST call failed on JSON parsing");
            responseBytes = replyError(req, res, statusCode = SC_BAD_REQUEST, "Invalid " + JSON_TYPE + " in request", e);
        } catch (BadRequestException e) {
            cause = Optional.of(e);
            responseBytes = replyError(req, res, statusCode = SC_BAD_REQUEST, messageOr(e, "Bad Request"), e.caching(), e);
        } catch (AuthException e) {
            cause = Optional.of(e);
            responseBytes = replyError(req, res, statusCode = SC_FORBIDDEN, messageOr(e, "Forbidden"), e.caching(), e);
        } catch (AmbiguousViewException e) {
            cause = Optional.of(e);
            responseBytes = replyError(req, res, statusCode = SC_NOT_FOUND, messageOr(e, "Ambiguous"), e);
        } catch (ResourceNotFoundException e) {
            cause = Optional.of(e);
            responseBytes = replyError(req, res, statusCode = SC_NOT_FOUND, messageOr(e, "Not Found"), e.caching(), e);
        } catch (MethodNotAllowedException e) {
            cause = Optional.of(e);
            responseBytes = replyError(req, res, statusCode = SC_METHOD_NOT_ALLOWED, messageOr(e, "Method Not Allowed"), e.caching(), e);
        } catch (ResourceConflictException e) {
            cause = Optional.of(e);
            responseBytes = replyError(req, res, statusCode = SC_CONFLICT, messageOr(e, "Conflict"), e.caching(), e);
        } catch (PreconditionFailedException e) {
            cause = Optional.of(e);
            responseBytes = replyError(req, res, statusCode = SC_PRECONDITION_FAILED, messageOr(e, "Precondition Failed"), e.caching(), e);
        } catch (UnprocessableEntityException e) {
            cause = Optional.of(e);
            responseBytes = replyError(req, res, statusCode = SC_UNPROCESSABLE_ENTITY, messageOr(e, "Unprocessable Entity"), e.caching(), e);
        } catch (NotImplementedException e) {
            cause = Optional.of(e);
            logger.atSevere().withCause(e).log("Error in %s %s", req.getMethod(), uriForLogging(req));
            responseBytes = replyError(req, res, statusCode = SC_NOT_IMPLEMENTED, messageOr(e, "Not Implemented"), e);
        } catch (QuotaException e) {
            cause = Optional.of(e);
            responseBytes = replyError(req, res, statusCode = SC_TOO_MANY_REQUESTS, messageOr(e, "Quota limit reached"), e.caching(), e);
        } catch (InvalidDeadlineException e) {
            cause = Optional.of(e);
            responseBytes = replyError(req, res, statusCode = SC_BAD_REQUEST, messageOr(e, "Bad Request"), e);
        } catch (Exception e) {
            cause = Optional.of(e);
            Optional<RequestCancelledException> requestCancelledException = RequestCancelledException.getFromCausalChain(e);
            if (requestCancelledException.isPresent()) {
                RequestStateProvider.Reason cancellationReason = requestCancelledException.get().getCancellationReason();
                globals.cancellationMetrics.countCancelledRequest(RequestInfo.RequestType.REST, requestUri, cancellationReason);
                statusCode = getCancellationStatusCode(cancellationReason);
                responseBytes = replyError(req, res, statusCode, getCancellationMessage(requestCancelledException.get()), e);
            } else {
                statusCode = SC_INTERNAL_SERVER_ERROR;
                Optional<ExceptionHook.Status> status = getStatus(e);
                statusCode = status.map(ExceptionHook.Status::statusCode).orElse(SC_INTERNAL_SERVER_ERROR);
                if (res.isCommitted()) {
                    responseBytes = 0;
                    if (statusCode == SC_INTERNAL_SERVER_ERROR) {
                        logger.atSevere().withCause(e).log("Error in %s %s, response already committed", req.getMethod(), uriForLogging(req));
                    } else {
                        logger.atWarning().log("Response for %s %s already committed, wanted to set status %d", req.getMethod(), uriForLogging(req), statusCode);
                    }
                } else {
                    res.reset();
                    TraceContext.getTraceId().ifPresent(traceId -> res.addHeader(X_GERRIT_TRACE, traceId));
                    if (status.isPresent()) {
                        responseBytes = reply(req, res, e, status.get(), getUserMessages(e));
                    } else {
                        responseBytes = replyInternalServerError(req, res, e, getUserMessages(e));
                    }
                }
            }
        } finally {
            String metric = getViewName(viewData);
            String formattedCause = cause.map(globals.retryHelper::formatCause).orElse("_none");
            globals.metrics.count.increment(metric);
            if (statusCode >= SC_BAD_REQUEST) {
                globals.metrics.errorCount.increment(metric, statusCode, formattedCause);
            }
            if (responseBytes != -1) {
                globals.metrics.responseBytes.record(metric, responseBytes);
            }
            globals.metrics.serverLatency.record(metric, System.nanoTime() - startNanos, TimeUnit.NANOSECONDS);
            globals.auditService.dispatch(new ExtendedHttpAuditEvent(globals.webSession.get().getSessionId(), globals.currentUser.get(), req, auditStartTs, qp != null ? qp.params() : ImmutableListMultimap.of(), inputRequestBody, statusCode, response, rsrc, viewData == null ? null : viewData.view));
        }
    }
}

Example 2 with RestCollection

use of com.google.gerrit.extensions.restapi.RestCollection in project gerrit by GerritCodeReview.

the class RestApiServlet method view.

private ViewData view(RestCollection<RestResource, RestResource> rc, String method, List<IdString> path) throws AmbiguousViewException, RestApiException {
    DynamicMap<RestView<RestResource>> views = rc.views();
    final IdString projection = path.isEmpty() ? IdString.fromUrl("/") : path.remove(0);
    if (!path.isEmpty()) {
        // If there are path components still remaining after this projection
        // is chosen, look for the projection based upon GET as the method as
        // the client thinks it is a nested collection.
        method = "GET";
    } else if ("HEAD".equals(method)) {
        method = "GET";
    }
    List<String> p = splitProjection(projection);
    if (p.size() == 2) {
        String viewname = p.get(1);
        if (Strings.isNullOrEmpty(viewname)) {
            viewname = "/";
        }
        RestView<RestResource> view = views.get(p.get(0), method + "." + viewname);
        if (view != null) {
            return new ViewData(p.get(0), view);
        }
        view = views.get(p.get(0), "GET." + viewname);
        if (view != null) {
            return new ViewData(p.get(0), view);
        }
        throw new ResourceNotFoundException(projection);
    }
    String name = method + "." + p.get(0);
    RestView<RestResource> core = views.get(PluginName.GERRIT, name);
    if (core != null) {
        return new ViewData(PluginName.GERRIT, core);
    }
    // GET.name so we have to check for this since we haven't found any other views.
    if (method.equals("GET")) {
        core = views.get(PluginName.GERRIT, "GET." + p.get(0));
        if (core != null) {
            return new ViewData(PluginName.GERRIT, core);
        }
    }
    Map<String, RestView<RestResource>> r = new TreeMap<>();
    for (String plugin : views.plugins()) {
        RestView<RestResource> action = views.get(plugin, name);
        if (action != null) {
            r.put(plugin, action);
        }
    }
    if (r.isEmpty()) {
        // GET.name so we have to check for this since we haven't found any other views.
        for (String plugin : views.plugins()) {
            RestView<RestResource> action = views.get(plugin, "GET." + p.get(0));
            if (action != null) {
                r.put(plugin, action);
            }
        }
    }
    if (r.size() == 1) {
        Map.Entry<String, RestView<RestResource>> entry = Iterables.getOnlyElement(r.entrySet());
        return new ViewData(entry.getKey(), entry.getValue());
    }
    if (r.isEmpty()) {
        throw new ResourceNotFoundException(projection);
    }
    throw new AmbiguousViewException(String.format("Projection %s is ambiguous: %s", name, r.keySet().stream().map(in -> in + "~" + projection).collect(joining(", "))));
}