gristlabs_grist-core/app/server/lib/ActiveDoc.ts
Paul Fitzpatrick 312d2331a8 (core) lock down modification of the _grist_Attachments table
Summary:
Rows in the _grist_Attachments table have a special lifecycle,
being created by a special method, and deleted via a special
process. All other modifications are now rejected, for simplicity.

Test Plan: added test

Reviewers: dsagal, jarek

Reviewed By: dsagal, jarek

Differential Revision: https://phab.getgrist.com/D3712
2022-11-22 11:30:54 -05:00

2339 lines
101 KiB
TypeScript

/**
* Module to manage "active" Grist documents, i.e. those loaded in-memory, with
* clients connected to them. It handles the incoming user actions, and outgoing
* change events.
*/
import {
getEnvContent,
LocalActionBundle,
SandboxActionBundle,
SandboxRequest,
UserActionBundle
} from 'app/common/ActionBundle';
import {ActionGroup, MinimalActionGroup} from 'app/common/ActionGroup';
import {ActionSummary} from "app/common/ActionSummary";
import {
AclTableDescription,
ApplyUAExtendedOptions,
ApplyUAOptions,
ApplyUAResult,
DataSourceTransformed,
ForkResult,
ImportOptions,
ImportResult,
ISuggestionWithValue,
MergeOptions,
PermissionDataWithExtraUsers,
QueryResult,
ServerQuery,
TransformRule
} from 'app/common/ActiveDocAPI';
import {ApiError} from 'app/common/ApiError';
import {mapGetOrSet, MapWithTTL} from 'app/common/AsyncCreate';
import {
BulkRemoveRecord,
BulkUpdateRecord,
CellValue,
DocAction,
getTableId,
TableDataAction,
TableRecordValue,
toTableDataAction,
UserAction
} from 'app/common/DocActions';
import {DocData} from 'app/common/DocData';
import {getDataLimitRatio, getDataLimitStatus, getSeverity, LimitExceededError} from 'app/common/DocLimits';
import {DocSnapshots} from 'app/common/DocSnapshot';
import {DocumentSettings} from 'app/common/DocumentSettings';
import {
APPROACHING_LIMIT_RATIO,
DataLimitStatus,
DocumentUsage,
DocUsageSummary,
FilteredDocUsageSummary,
getUsageRatio,
RowCounts,
} from 'app/common/DocUsage';
import {normalizeEmail} from 'app/common/emails';
import {Product} from 'app/common/Features';
import {FormulaProperties, getFormulaProperties} from 'app/common/GranularAccessClause';
import {parseUrlId} from 'app/common/gristUrls';
import {byteString, countIf, retryOnce, safeJsonParse} from 'app/common/gutil';
import {InactivityTimer} from 'app/common/InactivityTimer';
import {Interval} from 'app/common/Interval';
import * as roles from 'app/common/roles';
import {schema, SCHEMA_VERSION} from 'app/common/schema';
import {MetaRowRecord, SingleCell} from 'app/common/TableData';
import {UIRowId} from 'app/common/UIRowId';
import {FetchUrlOptions, UploadResult} from 'app/common/uploads';
import {DocReplacementOptions, DocState, DocStateComparison} from 'app/common/UserAPI';
import {convertFromColumn} from 'app/common/ValueConverter';
import {guessColInfoWithDocData} from 'app/common/ValueGuesser';
import {parseUserAction} from 'app/common/ValueParser';
import {ParseOptions} from 'app/plugin/FileParserAPI';
import {AccessTokenOptions, AccessTokenResult, GristDocAPI} from 'app/plugin/GristAPI';
import {compileAclFormula} from 'app/server/lib/ACLFormula';
import {Authorizer} from 'app/server/lib/Authorizer';
import {checksumFile} from 'app/server/lib/checksumFile';
import {Client} from 'app/server/lib/Client';
import {DEFAULT_CACHE_TTL, DocManager} from 'app/server/lib/DocManager';
import {ICreateActiveDocOptions} from 'app/server/lib/ICreate';
import {makeForkIds} from 'app/server/lib/idUtils';
import {GRIST_DOC_SQL, GRIST_DOC_WITH_TABLE1_SQL} from 'app/server/lib/initialDocSql';
import {ISandbox} from 'app/server/lib/ISandbox';
import log from 'app/server/lib/log';
import {LogMethods} from "app/server/lib/LogMethods";
import {DocRequests} from 'app/server/lib/Requests';
import {shortDesc} from 'app/server/lib/shortDesc';
import {TableMetadataLoader} from 'app/server/lib/TableMetadataLoader';
import {DocTriggers} from "app/server/lib/Triggers";
import {fetchURL, FileUploadInfo, globalUploadSet, UploadInfo} from 'app/server/lib/uploads';
import assert from 'assert';
import {Mutex} from 'async-mutex';
import * as bluebird from 'bluebird';
import {EventEmitter} from 'events';
import {IMessage, MsgType} from 'grain-rpc';
import imageSize from 'image-size';
import * as moment from 'moment-timezone';
import fetch from 'node-fetch';
import {createClient, RedisClient} from 'redis';
import tmp from 'tmp';
import {ActionHistory} from './ActionHistory';
import {ActionHistoryImpl} from './ActionHistoryImpl';
import {ActiveDocImport} from './ActiveDocImport';
import {DocClients} from './DocClients';
import {DocPluginManager} from './DocPluginManager';
import {
DocSession,
getDocSessionAccess,
getDocSessionUser,
getDocSessionUserId,
makeExceptionalDocSession,
OptDocSession
} from './DocSession';
import {createAttachmentsIndex, DocStorage, REMOVE_UNUSED_ATTACHMENTS_DELAY} from './DocStorage';
import {expandQuery} from './ExpandedQuery';
import {GranularAccess, GranularAccessForBundle} from './GranularAccess';
import {OnDemandActions} from './OnDemandActions';
import {getLogMetaFromDocSession, timeoutReached} from './serverUtils';
import {findOrAddAllEnvelope, Sharing} from './Sharing';
import cloneDeep = require('lodash/cloneDeep');
import flatten = require('lodash/flatten');
import pick = require('lodash/pick');
import remove = require('lodash/remove');
import sum = require('lodash/sum');
import without = require('lodash/without');
import zipObject = require('lodash/zipObject');
bluebird.promisifyAll(tmp);
const MAX_RECENT_ACTIONS = 100;
const DEFAULT_TIMEZONE = (process.versions as any).electron ? moment.tz.guess() : "UTC";
const DEFAULT_LOCALE = process.env.GRIST_DEFAULT_LOCALE || "en-US";
// Number of seconds an ActiveDoc is retained without any clients.
// In dev environment, it is convenient to keep this low for quick tests.
// In production, it is reasonable to stretch it out a bit.
const ACTIVEDOC_TIMEOUT = (process.env.NODE_ENV === 'production') ? 30 : 5;
// We'll wait this long between re-measuring sandbox memory.
const MEMORY_MEASUREMENT_INTERVAL_MS = 60 * 1000;
// Apply the UpdateCurrentTime user action every hour
const UPDATE_CURRENT_TIME_DELAY = {delayMs: 60 * 60 * 1000, varianceMs: 30 * 1000};
// Measure and broadcast data size every 5 minutes
const UPDATE_DATA_SIZE_DELAY = {delayMs: 5 * 60 * 1000, varianceMs: 30 * 1000};
// A hook for dependency injection.
export const Deps = {ACTIVEDOC_TIMEOUT};
interface UpdateUsageOptions {
// Whether usage should be synced to the home database. Defaults to true.
syncUsageToDatabase?: boolean;
// Whether usage should be broadcast to all doc clients. Defaults to true.
broadcastUsageToClients?: boolean;
}
/**
* Represents an active document with the given name. The document isn't actually open until
* either .loadDoc() or .createEmptyDoc() is called.
* @param {String} docName - The document's filename, without the '.grist' extension.
*/
export class ActiveDoc extends EventEmitter {
/**
* Decorator for ActiveDoc methods that prevents shutdown while the method is running, i.e.
* until the returned promise is resolved.
*/
public static keepDocOpen(target: ActiveDoc, propertyKey: string, descriptor: PropertyDescriptor) {
const origFunc = descriptor.value;
descriptor.value = function(this: ActiveDoc) {
return this._inactivityTimer.disableUntilFinish(origFunc.apply(this, arguments));
};
}
public readonly docStorage: DocStorage;
public readonly docPluginManager: DocPluginManager|null;
public readonly docClients: DocClients; // Only exposed for Sharing.ts
public docData: DocData|null = null;
protected _actionHistory: ActionHistory;
protected _docManager: DocManager;
protected _docName: string;
protected _sharing: Sharing;
// This lock is used to avoid reading sandbox state while it is being modified but before
// the result has been confirmed to pass granular access rules (which may depend on the
// result).
protected _modificationLock: Mutex = new Mutex();
private _log = new LogMethods('ActiveDoc ', (s: OptDocSession | null) => this.getLogMeta(s));
private _triggers: DocTriggers;
private _requests: DocRequests;
private _dataEngine: Promise<ISandbox>|undefined;
private _activeDocImport: ActiveDocImport;
private _onDemandActions: OnDemandActions;
private _granularAccess: GranularAccess;
private _tableMetadataLoader: TableMetadataLoader;
private _muted: boolean = false; // If set, changes to this document should not propagate
// to outside world
private _migrating: number = 0; // If positive, a migration is in progress
private _initializationPromise: Promise<void>|null = null;
// If set, wait on this to be sure the ActiveDoc is fully
// initialized. True on success.
private _fullyLoaded: boolean = false; // Becomes true once all columns are loaded/computed.
private _lastMemoryMeasurement: number = 0; // Timestamp when memory was last measured.
private _fetchCache = new MapWithTTL<string, Promise<TableDataAction>>(DEFAULT_CACHE_TTL);
private _docUsage: DocumentUsage|null = null;
private _product?: Product;
private _gracePeriodStart: Date|null = null;
private _isForkOrSnapshot: boolean = false;
private _onlyAllowMetaDataActionsOnDb: boolean = false;
// Client watching for 'product changed' event published by Billing to update usage
private _redisSubscriber?: RedisClient;
// Timer for shutting down the ActiveDoc a bit after all clients are gone.
private _inactivityTimer = new InactivityTimer(() => this.shutdown(), Deps.ACTIVEDOC_TIMEOUT * 1000);
private _recoveryMode: boolean = false;
private _shuttingDown: boolean = false;
/**
* In cases where large numbers of documents are restarted simultaneously
* (like during deployments), there's a tendency for scheduled intervals to
* execute at roughly the same moment in time, which causes spikes in load.
*
* To mitigate this, we use randomized intervals that re-compute their delay
* in-between calls, with a variance of 30 seconds.
*/
private _intervals = [
// Cleanup expired attachments every hour (also happens when shutting down).
new Interval(
() => this.removeUnusedAttachments(true),
REMOVE_UNUSED_ATTACHMENTS_DELAY,
{onError: (e) => this._log.error(null, 'failed to remove expired attachments', e)},
),
// Update the time in formulas every hour.
new Interval(
() => this._applyUserActions(makeExceptionalDocSession('system'), [['UpdateCurrentTime']]),
UPDATE_CURRENT_TIME_DELAY,
{onError: (e) => this._log.error(null, 'failed to update current time', e)},
),
// Measure and broadcast data size every 5 minutes.
new Interval(
() => this._checkDataSizeLimitRatio(makeExceptionalDocSession('system')),
UPDATE_DATA_SIZE_DELAY,
{onError: (e) => this._log.error(null, 'failed to update data size', e)},
),
];
constructor(docManager: DocManager, docName: string, private _options?: ICreateActiveDocOptions) {
super();
const {forkId, snapshotId} = parseUrlId(docName);
this._isForkOrSnapshot = Boolean(forkId || snapshotId);
if (_options?.safeMode) { this._recoveryMode = true; }
if (_options?.doc) {
const {gracePeriodStart, workspace, usage} = _options.doc;
const billingAccount = workspace.org.billingAccount;
this._product = billingAccount?.product;
this._gracePeriodStart = gracePeriodStart;
if (process.env.REDIS_URL && billingAccount) {
const channel = `billingAccount-${billingAccount.id}-product-changed`;
this._redisSubscriber = createClient(process.env.REDIS_URL);
this._redisSubscriber.subscribe(channel);
this._redisSubscriber.on("message", async () => {
// A product change has just happened in Billing.
// Reload the doc (causing connected clients to reload) to ensure everyone sees the effect of the change.
await this.reloadDoc();
});
}
if (!this._isForkOrSnapshot) {
/* Note: We don't currently persist usage for forks or snapshots anywhere, so
* we need to hold off on setting _docUsage here. Normally, usage is set shortly
* after initialization finishes, after data/attachments size has finished
* calculating. However, this leaves a narrow window where forks can circumvent
* delete-only restrictions and replace the trunk document (even when the trunk
* is delete-only). This isn't very concerning today as the window is typically
* too narrow to easily exploit, and there are other ways to work around limits,
* like resetting gracePeriodStart by momentarily lowering usage. Regardless, it
* would be good to fix this eventually (perhaps around the same time we close
* up the gracePeriodStart loophole).
*
* TODO: Revisit this later and patch up the loophole. */
this._docUsage = usage;
}
}
this._docManager = docManager;
this._docName = docName;
this.docStorage = new DocStorage(docManager.storageManager, docName);
this.docClients = new DocClients(this);
this._triggers = new DocTriggers(this);
this._requests = new DocRequests(this);
this._actionHistory = new ActionHistoryImpl(this.docStorage);
this.docPluginManager = docManager.pluginManager ?
new DocPluginManager(docManager.pluginManager.getPlugins(),
docManager.pluginManager.appRoot!, this, this._docManager.gristServer) : null;
this._tableMetadataLoader = new TableMetadataLoader({
decodeBuffer: this.docStorage.decodeMarshalledData.bind(this.docStorage),
fetchTable: this.docStorage.fetchTable.bind(this.docStorage),
loadMetaTables: this._rawPyCall.bind(this, 'load_meta_tables'),
loadTable: this._rawPyCall.bind(this, 'load_table'),
});
// Our DataEngine is a separate sandboxed process (one sandbox per open document,
// corresponding to one process for pynbox, more for gvisor).
// The data engine runs user-defined python code including formula calculations.
// It maintains all document data and metadata, and applies translates higher-level UserActions
// into lower-level DocActions.
// Creation of the data engine needs to be deferred since we need to look at the document to
// see what kind of engine it needs. This doesn't delay loading the document, but could delay
// first calculation and modification.
// TODO: consider caching engine requirement for doc in home db - or running python2
// in gvisor (but would still need to look at doc to know what process to start in sandbox)
this._activeDocImport = new ActiveDocImport(this);
// Schedule shutdown immediately. If a client connects soon (normal case), it will get
// unscheduled. If not (e.g. abandoned import, network problems after creating a doc), then
// the ActiveDoc will get cleaned up.
this._inactivityTimer.enable();
for (const interval of this._intervals) {
interval.enable();
}
}
public get docName(): string { return this._docName; }
public get recoveryMode(): boolean { return this._recoveryMode; }
public get isShuttingDown(): boolean { return this._shuttingDown; }
public get rowLimitRatio(): number {
return getUsageRatio(
this._docUsage?.rowCount?.total,
this._product?.features.baseMaxRowsPerDocument
);
}
public get dataSizeLimitRatio(): number {
return getUsageRatio(
this._docUsage?.dataSizeBytes,
this._product?.features.baseMaxDataSizePerDocument
);
}
public get dataLimitRatio(): number {
return getDataLimitRatio(this._docUsage, this._product?.features);
}
public get dataLimitStatus(): DataLimitStatus {
return getDataLimitStatus({
docUsage: this._docUsage,
productFeatures: this._product?.features,
gracePeriodStart: this._gracePeriodStart,
});
}
public getDocUsageSummary(): DocUsageSummary {
return {
dataLimitStatus: this.dataLimitStatus,
rowCount: this._docUsage?.rowCount ?? 'pending',
dataSizeBytes: this._docUsage?.dataSizeBytes ?? 'pending',
attachmentsSizeBytes: this._docUsage?.attachmentsSizeBytes ?? 'pending',
};
}
public async getFilteredDocUsageSummary(
docSession: OptDocSession
): Promise<FilteredDocUsageSummary> {
return this._granularAccess.filterDocUsageSummary(docSession, this.getDocUsageSummary());
}
public async getUserOverride(docSession: OptDocSession) {
return this._granularAccess.getUserOverride(docSession);
}
// Constructs metadata for logging, given a Client or an OptDocSession.
public getLogMeta(docSession: OptDocSession|null, docMethod?: string): log.ILogMeta {
return {
...(docSession ? getLogMetaFromDocSession(docSession) : {}),
docId: this._docName,
...(docMethod ? {docMethod} : {}),
};
}
public setMuted() {
this._muted = true;
}
public get muted() {
return this._muted;
}
public isMigrating() {
return this._migrating;
}
// Note that this method is only used in tests, and should be avoided in production (see note
// in ActionHistory about getRecentActions).
public getRecentActionsDirect(maxActions?: number): Promise<LocalActionBundle[]> {
return this._actionHistory.getRecentActions(maxActions);
}
public async getRecentStates(docSession: OptDocSession, maxStates?: number): Promise<DocState[]> {
// Doc states currently don't include user content, so it seems ok to let all
// viewers have access to them.
return this._actionHistory.getRecentStates(maxStates);
}
/**
* Access specific actions identified by actionNum.
* TODO: for memory reasons on large docs, would be best not to hold many actions
* in memory at a time, so should e.g. fetch them one at a time.
*/
public getActions(actionNums: number[]): Promise<Array<LocalActionBundle|undefined>> {
return this._actionHistory.getActions(actionNums);
}
/**
* Get the most recent actions from the history. Results are ordered by
* earliest actions first, later actions later. If `summarize` is set,
* action summaries are computed and included.
*/
public async getRecentActions(docSession: OptDocSession, summarize: boolean): Promise<ActionGroup[]> {
const groups = await this._actionHistory.getRecentActionGroups(MAX_RECENT_ACTIONS,
{clientId: docSession.client?.clientId, summarize});
const permittedGroups: ActionGroup[] = [];
// Process groups serially since the work is synchronous except for some
// possible db accesses that will be serialized in any case.
for (const group of groups) {
if (await this._granularAccess.allowActionGroup(docSession, group)) {
permittedGroups.push(group);
}
}
return permittedGroups;
}
public async getRecentMinimalActions(docSession: OptDocSession): Promise<MinimalActionGroup[]> {
return this._actionHistory.getRecentMinimalActionGroups(
MAX_RECENT_ACTIONS, docSession.client?.clientId);
}
/** expose action history for tests */
public getActionHistory(): ActionHistory {
return this._actionHistory;
}
public handleTriggers(localActionBundle: LocalActionBundle): Promise<ActionSummary> {
return this._triggers.handle(localActionBundle);
}
/**
* Adds a client of this doc to the list of connected clients.
* @param client: The client object maintaining the websocket connection.
* @param authorizer: The authorizer for the client/doc combination.
* @returns docSession
*/
public addClient(client: Client, authorizer: Authorizer): DocSession {
const docSession: DocSession = this.docClients.addClient(client, authorizer);
// If we had a shutdown scheduled, unschedule it.
if (this._inactivityTimer.isEnabled()) {
this._log.info(docSession, "will stay open");
this._inactivityTimer.disable();
}
return docSession;
}
/**
* Shut down the ActiveDoc, and remove it from the DocManager. An optional
* afterShutdown operation can be provided, which will be run once the ActiveDoc
* is completely shut down but before it is removed from the DocManager, ensuring
* that the operation will not overlap with a new ActiveDoc starting up for the
* same document.
*/
public async shutdown(options: {
afterShutdown?: () => Promise<void>
} = {}): Promise<void> {
const docSession = makeExceptionalDocSession('system');
this._log.debug(docSession, "shutdown starting");
try {
this.setMuted();
this._inactivityTimer.disable();
if (this.docClients.clientCount() > 0) {
this._log.warn(docSession, `Doc being closed with ${this.docClients.clientCount()} clients left`);
await this.docClients.broadcastDocMessage(null, 'docShutdown', null);
this.docClients.interruptAllClients();
this.docClients.removeAllClients();
}
this._triggers.shutdown();
this._redisSubscriber?.quitAsync()
.catch(e => this._log.warn(docSession, "Failed to quit redis subscriber", e));
// Clear the MapWithTTL to remove all timers from the event loop.
this._fetchCache.clear();
for (const interval of this._intervals) {
await interval.disableAndFinish();
}
// We'll defer syncing usage until everything is calculated.
const usageOptions = {syncUsageToDatabase: false, broadcastUsageToClients: false};
// This cleanup requires docStorage, which may have failed to start up.
// We don't want to log pointless errors in that case.
if (this.docStorage.isInitialized()) {
// Remove expired attachments, i.e. attachments that were soft deleted a while ago. This
// needs to happen periodically, and doing it here means we can guarantee that it happens
// even if the doc is only ever opened briefly, without having to slow down startup.
const removeAttachmentsPromise = this.removeUnusedAttachments(true, usageOptions);
// Update data size; we'll be syncing both it and attachments size to the database soon.
const updateDataSizePromise = this._updateDataSize(usageOptions);
try {
await removeAttachmentsPromise;
} catch (e) {
this._log.error(docSession, "Failed to remove expired attachments", e);
}
try {
await updateDataSizePromise;
} catch (e) {
this._log.error(docSession, "Failed to update data size", e);
}
}
this._syncDocUsageToDatabase(true);
try {
await this._docManager.storageManager.closeDocument(this.docName);
} catch (err) {
log.error('Problem shutting down document: %s %s', this.docName, err.message);
}
try {
const dataEngine = this._dataEngine ? await this._getEngine() : null;
this._shuttingDown = true; // Block creation of engine if not yet in existence.
if (dataEngine) {
// Give a small grace period for finishing initialization if we are being shut
// down while initialization is still in progress, and we don't have an easy
// way yet to cancel it cleanly. This is mainly for the benefit of automated
// tests.
await timeoutReached(3000, this.waitForInitialization());
}
await Promise.all([
this.docStorage.shutdown(),
this.docPluginManager?.shutdown(),
dataEngine?.shutdown()
]);
// The this.waitForInitialization promise may not yet have resolved, but
// should do so quickly now we've killed everything it depends on.
try {
await this.waitForInitialization();
} catch (err) {
// Initialization errors do not matter at this point.
}
} catch (err) {
this._log.error(docSession, "failed to shutdown some resources", err);
}
await options.afterShutdown?.();
} finally {
this._docManager.removeActiveDoc(this);
}
try {
await this._granularAccess.close();
} catch (err) {
// This should not happen.
this._log.error(docSession, "failed to shutdown granular access", err);
}
this._log.debug(docSession, "shutdown complete");
}
/**
* Create a new blank document (no "Table1") using the data engine. This is used only
* to generate the SQL saved to initialDocSql.ts
*
* It does not set documentSettings.engine. When a document is created during normal
* operation, documentSettings.engine gets set after the SQL is used to seed it, in
* _createDocFile()
*
*/
@ActiveDoc.keepDocOpen
public async createEmptyDocWithDataEngine(docSession: OptDocSession): Promise<ActiveDoc> {
this._log.debug(docSession, "createEmptyDocWithDataEngine");
await this._docManager.storageManager.prepareToCreateDoc(this.docName);
await this.docStorage.createFile();
await this._rawPyCall('load_empty');
// This init action is special. It creates schema tables, and is used to init the DB, but does
// not go through other steps of a regular action (no ActionHistory or broadcasting).
const initBundle = await this._rawPyCall('apply_user_actions', [["InitNewDoc"]]);
await this.docStorage.execTransaction(() =>
this.docStorage.applyStoredActions(getEnvContent(initBundle.stored)));
// DocStorage can't create this index in the initial schema
// because the table _grist_Attachments doesn't exist at that point - it's created by InitNewDoc.
await createAttachmentsIndex(this.docStorage);
await this._initDoc(docSession);
await this._tableMetadataLoader.clean();
// Makes sure docPluginManager is ready in case new doc is used to import new data
await this.docPluginManager?.ready;
this._fullyLoaded = true;
return this;
}
/**
* Create a new blank document (no "Table1"), used as a stub when importing.
*/
@ActiveDoc.keepDocOpen
public async createEmptyDoc(docSession: OptDocSession,
options?: { useExisting?: boolean }): Promise<ActiveDoc> {
await this.loadDoc(docSession, {forceNew: true,
skipInitialTable: true,
...options});
// Makes sure docPluginManager is ready in case new doc is used to import new data
await this.docPluginManager?.ready;
this._fullyLoaded = true;
return this;
}
/**
* Loads an existing document from storage, fetching all data from the database via DocStorage and
* loading it into the DataEngine. User tables are not immediately loaded (see use of
* this.waitForInitialization throughout this class to wait for that).
* @returns {Promise} Promise for this ActiveDoc itself.
*/
@ActiveDoc.keepDocOpen
public async loadDoc(docSession: OptDocSession, options?: {
forceNew?: boolean, // If set, document will be created.
skipInitialTable?: boolean, // If set, and document is new, "Table1" will not be added.
useExisting?: boolean, // If set, document can be created as an overlay on
// an existing sqlite file.
}): Promise<ActiveDoc> {
const startTime = Date.now();
this._log.debug(docSession, "loadDoc");
try {
const isNew: boolean = options?.forceNew || await this._docManager.storageManager.prepareLocalDoc(this.docName);
if (isNew) {
await this._createDocFile(docSession, {
skipInitialTable: options?.skipInitialTable,
useExisting: options?.useExisting,
});
} else {
await this.docStorage.openFile({
beforeMigration: async (currentVersion, newVersion) => {
return this._beforeMigration(docSession, 'storage', currentVersion, newVersion);
},
afterMigration: async (newVersion, success) => {
return this._afterMigration(docSession, 'storage', newVersion, success);
},
});
}
const [tableNames, onDemandNames] = await this._loadOpenDoc(docSession);
const desiredTableNames = tableNames.filter(name => name.startsWith('_grist_'));
this._startLoadingTables(docSession, desiredTableNames);
const pendingTableNames = tableNames.filter(name => !name.startsWith('_grist_'));
await this._initDoc(docSession);
this._initializationPromise = this._finishInitialization(docSession, pendingTableNames,
onDemandNames, startTime).catch(async (err) => {
await this.docClients.broadcastDocMessage(null, 'docError', {
when: 'initialization',
message: String(err),
});
});
} catch (err) {
const level = err.status === 404 ? "warn" : "error";
this._log.log(level, docSession, "Failed to load document", err);
await this.shutdown();
throw err;
}
return this;
}
/**
* Replace this document with another, in-place so its id and other metadata does not change.
* This operation will leave the ActiveDoc it is called for unusable. It will mute it,
* shut it down, and unlist it via the DocManager. A fresh ActiveDoc can be acquired via the
* DocManager.
*/
public async replace(docSession: OptDocSession, source: DocReplacementOptions) {
// During replacement, it is important for all hands to be off the document. So we
// ask the shutdown method to do the replacement when the ActiveDoc is shutdown but
// before a new one could be opened.
if (!await this._granularAccess.isOwner(docSession)) {
throw new ApiError('Only owners can replace a document.', 403);
}
return this.shutdown({
afterShutdown: () => this._docManager.storageManager.replace(this.docName, source)
});
}
/**
* Finish initializing ActiveDoc, by initializing ActionHistory, Sharing, and docData.
*/
public async _initDoc(docSession: OptDocSession): Promise<void> {
const metaTableData = await this._tableMetadataLoader.fetchTablesAsActions();
this.docData = new DocData(tableId => this.fetchTable(makeExceptionalDocSession('system'), tableId), metaTableData);
this._onDemandActions = new OnDemandActions(this.docStorage, this.docData,
this._recoveryMode);
await this._actionHistory.initialize();
this._granularAccess = new GranularAccess(this.docData, this.docStorage, this.docClients, (query) => {
return this._fetchQueryFromDB(query, false);
}, this.recoveryMode, this.getHomeDbManager(), this.docName);
await this._granularAccess.update();
this._sharing = new Sharing(this, this._actionHistory, this._modificationLock);
// Make sure there is at least one item in action history. The document will be perfectly
// functional without it, but comparing documents would need updating if history can
// be empty. For example, comparing an empty document immediately forked with the
// original would fail. So far, we have treated documents without a common history
// as incomparible, and we'd need to weaken that to allow comparisons with a document
// with nothing in action history.
if (this._actionHistory.getNextLocalActionNum() === 1) {
await this._actionHistory.recordNextShared({
userActions: [],
undo: [],
info: [0, this._makeInfo(makeExceptionalDocSession('system'))],
actionNum: 1,
actionHash: null, // set by ActionHistory
parentActionHash: null,
stored: [],
calc: [],
envelopes: [],
});
}
}
public getHomeDbManager() {
return this._docManager.getHomeDbManager();
}
/**
* Adds a small table to start off a newly-created blank document.
*/
public addInitialTable(docSession: OptDocSession) {
// Use a non-client-specific session, so that this action is not part of anyone's undo history.
const newDocSession = makeExceptionalDocSession('nascent');
return this.applyUserActions(newDocSession, [["AddEmptyTable", null]]);
}
/**
* Imports files, removes previously created temporary hidden tables and creates the new ones.
* Param `prevTableIds` is an array of hiddenTableIds as received from previous `importFiles`
* call, or empty if there was no previous call.
*/
public importFiles(docSession: DocSession, dataSource: DataSourceTransformed,
parseOptions: ParseOptions, prevTableIds: string[]): Promise<ImportResult> {
return this._activeDocImport.importFiles(docSession, dataSource, parseOptions, prevTableIds);
}
/**
* Finishes import files, creates the new tables, and cleans up temporary hidden tables and uploads.
* Param `prevTableIds` is an array of hiddenTableIds as received from previous `importFiles`
* call, or empty if there was no previous call.
*/
public finishImportFiles(docSession: DocSession, dataSource: DataSourceTransformed,
prevTableIds: string[], importOptions: ImportOptions): Promise<ImportResult> {
return this._activeDocImport.finishImportFiles(docSession, dataSource, prevTableIds, importOptions);
}
/**
* Cancels import files, cleans up temporary hidden tables and uploads.
* Param `prevTableIds` is an array of hiddenTableIds as received from previous `importFiles`
* call, or empty if there was no previous call.
*/
public cancelImportFiles(docSession: DocSession, uploadId: number,
prevTableIds: string[]): Promise<void> {
return this._activeDocImport.cancelImportFiles(docSession, uploadId, prevTableIds);
}
/**
* Returns a diff of changes that will be applied to the destination table from `transformRule`
* if the data from `hiddenTableId` is imported with the specified `mergeOptions`.
*
* The diff is returned as a `DocStateComparison` of the same doc, with the `rightChanges`
* containing the updated cell values. Old values are pulled from the destination record (if
* a match was found), and new values are the result of merging in the new cell values with
* the merge strategy from `mergeOptions`.
*
* No distinction is currently made for added records vs. updated existing records; instead,
* we treat added records as an updated record in `hiddenTableId` where all the column
* values changed from blank to the original column values from `hiddenTableId`.
*/
public generateImportDiff(_docSession: DocSession, hiddenTableId: string, transformRule: TransformRule,
mergeOptions: MergeOptions): Promise<DocStateComparison> {
return this._activeDocImport.generateImportDiff(hiddenTableId, transformRule, mergeOptions);
}
/**
* Close the current document.
*/
public async closeDoc(docSession: DocSession): Promise<void> {
// Note that it's async only to satisfy the Rpc interface that expects a promise.
this.docClients.removeClient(docSession);
// If no more clients, schedule a shutdown.
if (this.docClients.clientCount() === 0) {
this._log.info(docSession, "will self-close in %d ms", this._inactivityTimer.getDelay());
this._inactivityTimer.enable();
}
}
/**
* Import the given upload as new tables in one step.
*/
@ActiveDoc.keepDocOpen
public async oneStepImport(docSession: OptDocSession, uploadInfo: UploadInfo): Promise<void> {
await this._activeDocImport.oneStepImport(docSession, uploadInfo);
}
/**
* This function saves attachments from a given upload and creates an entry for them in the database.
* It returns the list of rowIds for the rows created in the _grist_Attachments table.
*/
public async addAttachments(docSession: OptDocSession, uploadId: number): Promise<number[]> {
const userId = getDocSessionUserId(docSession);
const upload: UploadInfo = globalUploadSet.getUploadInfo(uploadId, this.makeAccessId(userId));
try {
// We'll assert that the upload won't cause limits to be exceeded, retrying once after
// soft-deleting any unused attachments.
await retryOnce(
() => this._assertUploadSizeBelowLimit(upload),
async (e) => {
if (!(e instanceof LimitExceededError)) { throw e; }
// Check if any attachments are unused and can be soft-deleted to reduce the existing
// total size. We could do this from the beginning, but updateUsedAttachmentsIfNeeded
// is potentially expensive, so this optimises for the common case of not exceeding the limit.
const hadChanges = await this.updateUsedAttachmentsIfNeeded();
if (hadChanges) {
await this._updateAttachmentsSize({syncUsageToDatabase: false});
} else {
// No point in retrying if nothing changed.
throw new LimitExceededError("Exceeded attachments limit for document");
}
}
);
const userActions: UserAction[] = await Promise.all(
upload.files.map(file => this._prepAttachment(docSession, file)));
const result = await this._applyUserActionsWithExtendedOptions(docSession, userActions, {
attachment: true,
});
this._updateAttachmentsSize().catch(e => {
this._log.warn(docSession, 'failed to update attachments size', e);
});
await this._granularAccess.noteUploads(docSession, result.retValues);
return result.retValues;
} finally {
await globalUploadSet.cleanup(uploadId);
}
}
/**
* Returns the record from _grist_Attachments table for the given attachment ID,
* or throws an error if not found.
*/
public getAttachmentMetadata(attId: number): MetaRowRecord<'_grist_Attachments'> {
// docData should always be available after loadDoc() or createDoc().
if (!this.docData) {
throw new Error("No doc data");
}
const attRecord = this.docData.getMetaTable('_grist_Attachments').getRecord(attId);
if (!attRecord) {
throw new ApiError(`Attachment not found: ${attId}`, 404);
}
return attRecord;
}
/**
* Given a _gristAttachments record, returns a promise for the attachment data.
* Can optionally take a cell in which the attachment is expected to be
* referenced, and/or a `maybeNew` flag which, when set, specifies that the
* attachment may be a recent upload that is not yet referenced in the document.
* @returns {Promise<Buffer>} Promise for the data of this attachment; rejected on error.
*/
public async getAttachmentData(docSession: OptDocSession, attRecord: MetaRowRecord<"_grist_Attachments">,
options?: {
cell?: SingleCell,
maybeNew?: boolean,
}): Promise<Buffer> {
const attId = attRecord.id;
const fileIdent = attRecord.fileIdent;
const cell = options?.cell;
const maybeNew = options?.maybeNew;
if (
await this._granularAccess.canReadEverything(docSession) ||
await this.canDownload(docSession)
) {
// Do not need to sweat over access to attachments if user can
// read everything or download everything.
} else {
if (maybeNew && await this._granularAccess.isAttachmentUploadedByUser(docSession, attId)) {
// Fine, this is an attachment the user uploaded (recently).
} else if (cell) {
// Only provide the download if the user has access to the cell
// they specified, and that cell is in an attachment column,
// and the cell contains the specified attachment.
await this._granularAccess.assertAttachmentAccess(docSession, cell, attId);
} else {
if (!await this._granularAccess.findAttachmentCellForUser(docSession, attId)) {
// We found no reason to allow this user to access the attachment.
throw new ApiError('Cannot access attachment', 403);
}
}
}
const data = await this.docStorage.getFileData(fileIdent);
if (!data) { throw new ApiError("Invalid attachment identifier", 404); }
this._log.info(docSession, "getAttachment: %s -> %s bytes", fileIdent, data.length);
return data;
}
/**
* Fetches the meta tables to return to the client when first opening a document.
*/
public async fetchMetaTables(docSession: OptDocSession) {
this._log.info(docSession, "fetchMetaTables");
if (!this.docData) { throw new Error("No doc data"); }
// Get metadata from local cache rather than data engine, so that we can
// still get it even if data engine is busy calculating.
const tables: {[key: string]: TableDataAction} = {};
for (const [tableId, tableData] of this.docData.getTables().entries()) {
if (!tableId.startsWith('_grist_')) { continue; }
tables[tableId] = tableData.getTableDataAction();
}
return this._granularAccess.filterMetaTables(docSession, tables);
}
/**
* Makes sure document is completely initialized. May throw if doc is broken.
*/
public async waitForInitialization() {
await this._initializationPromise;
}
// Check if user has rights to download this doc.
public async canDownload(docSession: OptDocSession) {
return this._granularAccess.canCopyEverything(docSession);
}
// Check if it is appropriate for the user to be treated as an owner of
// the document for granular access purposes when in "prefork" mode
// (meaning a document has been opened with the intent to fork it, but
// an initial modification has not yet been made).
// Currently, we decide it is appropriate if the user has access to all
// the data in the document, either directly or via the special
// "FullCopies" permission.
public async canForkAsOwner(docSession: OptDocSession) {
return this._granularAccess.canCopyEverything(docSession);
}
// Remove cached access information for a given session.
public flushAccess(docSession: OptDocSession) {
return this._granularAccess.flushAccess(docSession);
}
/**
* Fetches a particular table from the data engine to return to the client.
* @param {String} tableId: The string identifier of the table.
* @param {Boolean} waitForFormulas: If true, wait for all data to be loaded/calculated.
* @returns {Promise} Promise for the TableData object, which is a BulkAddRecord-like array of the
* form of the form ["TableData", table_id, row_ids, column_values].
*/
public async fetchTable(docSession: OptDocSession, tableId: string,
waitForFormulas: boolean = false): Promise<TableDataAction> {
return this.fetchQuery(docSession, {tableId, filters: {}}, waitForFormulas);
}
/**
* Fetches data according to the given query, which includes tableId and filters (see Query in
* app/common/ActiveDocAPI.ts). The data is fetched from the data engine for regular tables, or
* from the DocStorage directly for onDemand tables.
* @param {Boolean} waitForFormulas: If true, wait for all data to be loaded/calculated. If false,
* special "pending" values may be returned.
*/
public async fetchQuery(docSession: OptDocSession, query: ServerQuery,
waitForFormulas: boolean = false): Promise<TableDataAction> {
this._inactivityTimer.ping(); // The doc is in active use; ping it to stay open longer.
// If user does not have rights to access what this query is asking for, fail.
const tableAccess = await this._granularAccess.getTableAccess(docSession, query.tableId);
this._granularAccess.assertCanRead(tableAccess);
if (query.tableId.startsWith('_gristsys_')) {
throw new Error('Cannot fetch _gristsys tables');
}
if (query.tableId.startsWith('_grist_') && !await this._granularAccess.canReadEverything(docSession)) {
// Metadata tables may need filtering, and this can't be done by looking at a single
// table. So we pick out the table we want from fetchMetaTables (which has applied
// filtering).
const tables = await this.fetchMetaTables(docSession);
const table = tables[query.tableId];
if (table) { return table; }
// If table not found, continue, to give a consistent error for a table not found.
}
// Some tests read _grist_ tables via the api. The _fetchQueryFromDB method
// currently cannot read those tables, so we load them from the data engine
// when ready.
// Also, if row-level access is being controlled, we wait for formula columns
// to be populated.
const wantFull = waitForFormulas || query.tableId.startsWith('_grist_') ||
this._granularAccess.getReadPermission(tableAccess) === 'mixed';
const onDemand = this._onDemandActions.isOnDemand(query.tableId);
this._log.info(docSession, "fetchQuery %s %s", JSON.stringify(query),
onDemand ? "(onDemand)" : "(regular)");
let data: TableDataAction;
if (onDemand) {
data = await this._fetchQueryFromDB(query, onDemand);
} else if (wantFull) {
await this.waitForInitialization();
data = await this._fetchQueryFromDataEngine(query);
} else {
if (!this._fullyLoaded) {
data = await this._fetchQueryFromDB(query, false);
}
if (this._fullyLoaded) { // Already loaded or finished loading while fetching from DB
const key = JSON.stringify(query);
// TODO: cache longer if the underlying fetch takes longer to do.
data = await mapGetOrSet(this._fetchCache, key, () => this._fetchQueryFromDataEngine(query));
}
}
// If row-level access is being controlled, filter the data appropriately.
// Likewise if column-level access is being controlled.
if (this._granularAccess.getReadPermission(tableAccess) !== 'allow') {
data = cloneDeep(data!); // Clone since underlying fetch may be cached and shared.
await this._granularAccess.filterData(docSession, data);
}
this._log.info(docSession, "fetchQuery -> %d rows, cols: %s",
data![2].length, Object.keys(data![3]).join(", "));
return data!;
}
/**
* Fetches the generated schema for a given table.
* @param {String} tableId: The string identifier of the table.
* @returns {Promise} Promise for a string representing the generated table schema.
*/
public async fetchTableSchema(docSession: DocSession): Promise<string> {
this._log.info(docSession, "fetchTableSchema(%s)", docSession);
// Permit code view if user can read everything, or can download/copy (perhaps
// via an exceptional permission for sample documents)
if (!(await this._granularAccess.canReadEverything(docSession) ||
await this.canDownload(docSession))) {
throw new ApiError('Cannot view code, it may contain private material', 403);
}
await this.waitForInitialization();
return this._pyCall('fetch_table_schema');
}
/**
* Makes a query (documented elsewhere) and subscribes to it, so that the client receives
* docActions that affect this query's results.
*/
public async useQuerySet(docSession: OptDocSession, query: ServerQuery): Promise<QueryResult> {
this._log.info(docSession, "useQuerySet(%s, %s)", docSession, query);
// TODO implement subscribing to the query.
// - Convert tableId+colIds to TableData/ColData references
// - Return a unique identifier for unsubscribing
// - Each call can create its own object, return own identifier.
// - Subscription should not be affected by renames (so don't hold on to query/tableId/colIds)
// - Table/column deletion should make subscription inactive, and unsubscribing an inactive
// subscription should not produce an error.
const tableData: TableDataAction = await this.fetchQuery(docSession, query);
return {querySubId: 0, tableData};
}
/**
* Removes all subscriptions to the given query from this client, so that it stops receiving
* docActions relevant only to this query.
*/
public async disposeQuerySet(docSession: DocSession, querySubId: number): Promise<void> {
this._log.info(docSession, "disposeQuerySet(%s, %s)", docSession, querySubId);
// TODO To-be-implemented
}
/**
* Returns the most likely target column in the document for the given column.
* @param {Array} values: An array of values to search for in columns in the document.
* @param {Number} n: Number of results to return.
* @param {String} optTableId: If a valid tableId, search only that table.
* @returns {Promise} Promise for an array of colRefs describing matching columns ordered from
* best to worst. Match quality is determined by searching only a sample of column data.
* See engine.py find_col_from_values for implementation.
*/
public async findColFromValues(docSession: DocSession, values: any[], n: number,
optTableId?: string): Promise<number[]> {
// This could leak information about private tables, so check for permission.
if (!await this._granularAccess.canScanData(docSession)) { return []; }
this._log.info(docSession, "findColFromValues(%s, %s, %s)", docSession, values, n);
await this.waitForInitialization();
return this._pyCall('find_col_from_values', values, n, optTableId);
}
/**
* Returns column metadata for all visible columns from `tableId`.
*
* @param {string} tableId Table to retrieve column metadata for.
* @returns {Promise<TableRecordValue[]>} Records containing metadata about the visible columns
* from `tableId`.
*/
public async getTableCols(
docSession: OptDocSession,
tableId: string,
includeHidden = false): Promise<TableRecordValue[]> {
const metaTables = await this.fetchMetaTables(docSession);
const tableRef = tableIdToRef(metaTables, tableId);
const [, , colRefs, columnData] = metaTables._grist_Tables_column;
// colId is pulled out of fields and used as the root id
const fieldNames = without(Object.keys(columnData), "colId");
const columns: TableRecordValue[] = [];
(columnData.colId as string[]).forEach((id, index) => {
const hasNoId = !id;
const isHidden = hasNoId || id === "manualSort" || id.startsWith("gristHelper_");
const fromDifferentTable = columnData.parentId[index] !== tableRef;
const skip = (isHidden && !includeHidden) || hasNoId || fromDifferentTable;
if (skip) {
return;
}
const column: TableRecordValue = { id, fields: { colRef: colRefs[index] } };
for (const key of fieldNames) {
column.fields[key] = columnData[key][index];
}
columns.push(column);
});
return columns;
}
/**
* Returns error message (traceback) for one invalid formula cell.
* @param {String} tableId - Table name
* @param {String} colId - Column name
* @param {Integer} rowId - Row number
* @returns {Promise} Promise for a error message
*/
public async getFormulaError(docSession: DocSession, tableId: string, colId: string,
rowId: number): Promise<CellValue> {
// Throw an error if the user doesn't have access to read this cell.
await this._granularAccess.getCellValue(docSession, {tableId, colId, rowId});
this._log.info(docSession, "getFormulaError(%s, %s, %s, %s)",
docSession, tableId, colId, rowId);
await this.waitForInitialization();
return this._pyCall('get_formula_error', tableId, colId, rowId);
}
/**
* Applies an array of user actions received from a browser client.
*
* @param {Object} docSession: The client session originating this action.
* @param {Array} action: The user action to apply, e.g. ["UpdateRecord", tableId, rowId, etc].
* @param {Object} options: See _applyUserActions for documentation
* @returns {Promise:Array[Object]} Promise that's resolved when action is applied successfully.
* The array includes the retValue objects for each
* actionGroup.
*/
public async applyUserActions(docSession: OptDocSession, actions: UserAction[],
unsanitizedOptions?: ApplyUAOptions): Promise<ApplyUAResult> {
const options = sanitizeApplyUAOptions(unsanitizedOptions);
return this._applyUserActionsWithExtendedOptions(docSession, actions, options);
}
/**
* A variant of applyUserActions where actions are passed in by ids (actionNum, actionHash)
* rather than by value.
*
* @param docSession: The client session originating this action.
* @param actionNums: The user actions to do/undo, by actionNum.
* @param actionHashes: actionHash checksums for each listed actionNum.
* @param undo: Whether the actions are to be undone.
* @param options: As for applyUserActions.
* @returns Promise of retValues, see applyUserActions.
*/
public async applyUserActionsById(docSession: DocSession,
actionNums: number[],
actionHashes: string[],
undo: boolean,
unsanitizedOptions?: ApplyUAOptions): Promise<ApplyUAResult> {
const options = sanitizeApplyUAOptions(unsanitizedOptions);
const actionBundles = await this._actionHistory.getActions(actionNums);
let fromOwnHistory: boolean = true;
const user = getDocSessionUser(docSession);
let oldestSource: number = Date.now();
for (const [index, bundle] of actionBundles.entries()) {
const actionNum = actionNums[index];
const actionHash = actionHashes[index];
if (!bundle) { throw new Error(`Could not find actionNum ${actionNum}`); }
const info = bundle.info[1];
const bundleEmail = info.user || '';
const sessionEmail = user?.email || '';
if (normalizeEmail(sessionEmail) !== normalizeEmail(bundleEmail)) {
fromOwnHistory = false;
}
if (info.time && info.time < oldestSource) {
oldestSource = info.time;
}
if (actionHash !== bundle.actionHash) {
throw new Error(`Hash mismatch for actionNum ${actionNum}: ` +
`expected ${actionHash} but got ${bundle.actionHash}`);
}
}
let actions: UserAction[];
if (undo) {
actions = [['ApplyUndoActions', flatten(actionBundles.map(a => a!.undo))]];
} else {
actions = flatten(actionBundles.map(a => a!.userActions));
}
// Granular access control implemented ultimately in _applyUserActions.
// It could be that error cases and timing etc leak some info prior to this
// point.
// Undos are best effort now by default.
return this._applyUserActionsWithExtendedOptions(
docSession, actions, {bestEffort: undo,
oldestSource,
fromOwnHistory, ...(options||{})});
}
/**
* Called by Sharing class for every LocalActionBundle (of our own actions) that gets applied.
*/
public async processActionBundle(localActionBundle: LocalActionBundle): Promise<void> {
const docData = this.docData;
if (!docData) { return; } // Happens on doc creation while processing InitNewDoc action.
localActionBundle.stored.forEach(da => docData.receiveAction(da[1]));
localActionBundle.calc.forEach(da => docData.receiveAction(da[1]));
const docActions = getEnvContent(localActionBundle.stored);
if (docActions.some(docAction => this._onDemandActions.isSchemaAction(docAction))) {
const indexes = this._onDemandActions.getDesiredIndexes();
await this.docStorage.updateIndexes(indexes);
// TODO: should probably add indexes for user attribute tables.
}
}
/**
* Used by tests to force an update indexes. We don't otherwise update indexes until
* there is a schema change.
*/
public async testUpdateIndexes() {
const indexes = this._onDemandActions.getDesiredIndexes();
await this.docStorage.updateIndexes(indexes);
}
public async removeInstanceFromDoc(docSession: DocSession): Promise<void> {
await this._sharing.removeInstanceFromDoc();
}
public async renameDocTo(docSession: OptDocSession, newName: string): Promise<void> {
this._log.debug(docSession, 'renameDoc', newName);
await this.docStorage.renameDocTo(newName);
this._docName = newName;
}
/**
* Initiates user actions bandling for undo.
*/
public startBundleUserActions(docSession: OptDocSession) {
if (!docSession.shouldBundleActions) {
docSession.shouldBundleActions = true;
docSession.linkId = 0;
}
}
/**
* Stops user actions bandling for undo.
*/
public stopBundleUserActions(docSession: OptDocSession) {
docSession.shouldBundleActions = false;
docSession.linkId = 0;
}
public async autocomplete(
docSession: DocSession, txt: string, tableId: string, columnId: string, rowId: UIRowId
): Promise<ISuggestionWithValue[]> {
// Autocompletion can leak names of tables and columns.
if (!await this._granularAccess.canScanData(docSession)) { return []; }
await this.waitForInitialization();
const user = await this._granularAccess.getCachedUser(docSession);
return this._pyCall('autocomplete', txt, tableId, columnId, rowId, user.toJSON());
}
public fetchURL(docSession: DocSession, url: string, options?: FetchUrlOptions): Promise<UploadResult> {
return fetchURL(url, this.makeAccessId(docSession.authorizer.getUserId()), options);
}
public async forwardPluginRpc(docSession: DocSession, pluginId: string, msg: IMessage): Promise<any> {
if (await this._granularAccess.hasNuancedAccess(docSession)) {
throw new Error('cannot confirm access to plugin');
}
if (!this.docPluginManager) { throw new Error('no plugin manager available'); }
const pluginRpc = this.docPluginManager.plugins[pluginId].rpc;
switch (msg.mtype) {
case MsgType.RpcCall: return pluginRpc.forwardCall(msg);
case MsgType.Custom: return pluginRpc.forwardMessage(msg);
}
throw new Error(`Invalid message type for forwardPluginRpc: ${msg.mtype}`);
}
/**
* Reload documents plugins.
*/
public async reloadPlugins(docSession: DocSession) {
// refresh the list plugins found on the system
if (!this._docManager.pluginManager || !this.docPluginManager) { return; }
await this._docManager.pluginManager.reloadPlugins();
const plugins = this._docManager.pluginManager.getPlugins();
// reload found plugins
await this.docPluginManager.reload(plugins);
}
/**
* Immediately close the document and data engine, to be reloaded from scratch, and cause all
* browser clients to reopen it.
*/
public async reloadDoc(docSession?: DocSession) {
return this.shutdown();
}
public isOwner(docSession: OptDocSession): Promise<boolean> {
return this._granularAccess.isOwner(docSession);
}
/**
* Fork the current document. In fact, all that requires is calculating a good
* ID for the fork. TODO: reconcile the two ways there are now of preparing a fork.
*/
public async fork(docSession: OptDocSession): Promise<ForkResult> {
const user = getDocSessionUser(docSession);
// For now, fork only if user can read everything (or is owner).
// TODO: allow forks with partial content.
if (!user || !await this.canDownload(docSession)) {
throw new ApiError('Insufficient access to document to copy it entirely', 403);
}
const userId = user.id;
const isAnonymous = this._docManager.isAnonymous(userId);
// Get fresh document metadata (the cached metadata doesn't include the urlId).
const doc = await docSession.authorizer?.getDoc();
if (!doc) { throw new Error('document id not known'); }
const trunkDocId = doc.id;
const trunkUrlId = doc.urlId || doc.id;
await this.flushDoc(); // Make sure fork won't be too out of date.
const forkIds = makeForkIds({userId, isAnonymous, trunkDocId, trunkUrlId});
// To actually create the fork, we call an endpoint. This is so the fork
// can be associated with an arbitrary doc worker, rather than tied to the
// same worker as the trunk. We use a Permit for authorization.
const permitStore = this._docManager.gristServer.getPermitStore();
const permitKey = await permitStore.setPermit({docId: forkIds.docId,
otherDocId: this.docName});
try {
const url = await this._docManager.gristServer.getHomeUrlByDocId(
forkIds.docId, `/api/docs/${forkIds.docId}/create-fork`);
const resp = await fetch(url, {
method: 'POST',
body: JSON.stringify({ srcDocId: this.docName }),
headers: {
'Permit': permitKey,
'Content-Type': 'application/json',
},
});
if (resp.status !== 200) {
throw new ApiError(resp.statusText, resp.status);
}
} finally {
await permitStore.removePermit(permitKey);
}
return forkIds;
}
public async getAccessToken(docSession: OptDocSession, options: AccessTokenOptions): Promise<AccessTokenResult> {
const tokens = this._docManager.gristServer.getAccessTokens();
const userId = getDocSessionUserId(docSession);
const docId = this.docName;
const access = getDocSessionAccess(docSession);
// If we happen to be using a "readOnly" connection, max out at "readOnly"
// even if user could do more.
if (roles.getStrongestRole('viewers', access) === 'viewers') {
options.readOnly = true;
}
// Return a token that can be used to authorize as the given user.
if (!userId) { throw new Error('creating access token requires a user'); }
const token = await tokens.sign({
readOnly: options.readOnly,
userId, // definitely do not want userId overridable by options.
docId, // likewise for docId.
});
const ttlMsecs = tokens.getNominalTTLInMsec();
const baseUrl = this._options?.docApiUrl;
if (!baseUrl) { throw new Error('cannot create token without URLs'); }
return {
token,
baseUrl,
ttlMsecs,
};
}
/**
* Check if an ACL formula is valid. If not, will throw an error with an explanation.
*/
public async checkAclFormula(docSession: DocSession, text: string): Promise<FormulaProperties> {
// Checks can leak names of tables and columns.
if (await this._granularAccess.hasNuancedAccess(docSession)) { return {}; }
await this.waitForInitialization();
try {
const parsedAclFormula = await this._pyCall('parse_acl_formula', text);
compileAclFormula(parsedAclFormula);
// TODO We also need to check the validity of attributes, and of tables and columns
// mentioned in resources and userAttribute rules.
return getFormulaProperties(parsedAclFormula);
} catch (e) {
e.message = e.message?.replace('[Sandbox] ', '');
throw e;
}
}
/**
* Returns the full set of tableIds, with basic metadata for each table. This is intended
* for editing ACLs. It is only available to users who can edit ACLs, and lists all resources
* regardless of rules that may block access to them.
*/
public async getAclResources(docSession: DocSession): Promise<{[tableId: string]: AclTableDescription}> {
if (!this.docData || !await this._granularAccess.hasAccessRulesPermission(docSession)) {
throw new Error('Cannot list ACL resources');
}
const result: {[tableId: string]: AclTableDescription} = {};
const tables = this.docData.getMetaTable('_grist_Tables');
const sections = this.docData.getMetaTable('_grist_Views_section');
const columns = this.docData.getMetaTable('_grist_Tables_column');
for (const table of tables.getRecords()) {
const sourceTable = table.summarySourceTable ? tables.getRecord(table.summarySourceTable)! : table;
const rawSection = sections.getRecord(sourceTable.rawViewSectionRef)!;
result[table.tableId] = {
title: rawSection.title || sourceTable.tableId,
colIds: ['id'],
groupByColLabels: table.summarySourceTable ? [] : null,
};
}
for (const col of columns.getRecords()) {
const tableId = tables.getValue(col.parentId, 'tableId')!;
result[tableId].colIds.push(col.colId);
if (col.summarySourceCol) {
const sourceCol = columns.getRecord(col.summarySourceCol)!;
result[tableId].groupByColLabels!.push(sourceCol.label);
}
}
return result;
}
/**
* Get users that are worth proposing to "View As" for access control purposes.
* User are drawn from the following sources:
* - Users document is shared with.
* - Users mentioned in user attribute tables keyed by email address.
* - Some predefined example users.
*
* The users the document is shared with are only available if the
* user is an owner of the document (or, in a fork, an owner of the
* trunk document). For viewers or editors, only the user calling
* the method will be included as users the document is shared with.
*
* Users mentioned in user attribute tables will be available to any user with
* the right to view access rules.
*
* Example users are always included.
*/
public async getUsersForViewAs(docSession: DocSession): Promise<PermissionDataWithExtraUsers> {
// Make sure we have rights to view access rules.
const db = this.getHomeDbManager();
if (!db || !await this._granularAccess.hasAccessRulesPermission(docSession)) {
throw new Error('Cannot list ACL users');
}
// Prepare a stub for the collected results.
const result: PermissionDataWithExtraUsers = {
users: [],
attributeTableUsers: [],
exampleUsers: [],
};
const isShared = new Set<string>();
// Collect users the document is shared with.
const userId = getDocSessionUserId(docSession);
if (!userId) { throw new Error('Cannot determine user'); }
const access = db.unwrapQueryResult(
await db.getDocAccess({userId, urlId: this.docName}, {
flatten: true, excludeUsersWithoutAccess: true,
}));
result.users = access.users;
result.users.forEach(user => isShared.add(normalizeEmail(user.email)));
// Collect users from user attribute tables. Omit duplicates with users the document is
// shared with.
const usersFromUserAttributes = await this._granularAccess.collectViewAsUsersFromUserAttributeTables();
for (const user of usersFromUserAttributes) {
if (!user.email) { continue; }
const email = normalizeEmail(user.email);
if (!isShared.has(email)) {
result.attributeTableUsers.push({email: user.email, name: user.name || '',
id: 0, access: user.access === undefined ? 'editors' : user.access});
}
}
// Add some example users.
result.exampleUsers = this._granularAccess.getExampleViewAsUsers();
return result;
}
public getGristDocAPI(): GristDocAPI {
if (!this.docPluginManager) { throw new Error('no plugin manager available'); }
return this.docPluginManager.gristDocAPI;
}
// Get recent actions in ActionGroup format with summaries included.
public async getActionSummaries(docSession: DocSession): Promise<ActionGroup[]> {
return this.getRecentActions(docSession, true);
}
/**
* Applies normal actions to the data engine while processing onDemand actions separately.
* Should only be called by a Sharing object, with this._modificationLock held, since the
* actions may need to be rolled back if final access control checks fail.
*/
public async applyActionsToDataEngine(
docSession: OptDocSession|null,
userActions: UserAction[]
): Promise<SandboxActionBundle> {
const [normalActions, onDemandActions] = this._onDemandActions.splitByOnDemand(userActions);
let sandboxActionBundle: SandboxActionBundle;
if (normalActions.length > 0) {
// For all but the special 'Calculate' action, we wait for full initialization.
if (normalActions[0][0] !== 'Calculate') {
await this.waitForInitialization();
}
const user = docSession ? await this._granularAccess.getCachedUser(docSession) : undefined;
sandboxActionBundle = await this._rawPyCall('apply_user_actions', normalActions, user?.toJSON());
const {requests} = sandboxActionBundle;
if (requests) {
this._requests.handleRequestsBatchFromUserActions(requests).catch(e => console.error(e));
}
await this._reportDataEngineMemory();
} else {
// Create default SandboxActionBundle to use if the data engine is not called.
sandboxActionBundle = createEmptySandboxActionBundle();
}
if (onDemandActions.length > 0) {
const allIndex = findOrAddAllEnvelope(sandboxActionBundle.envelopes);
await this.docStorage.execTransaction(async () => {
for (const action of onDemandActions) {
const {stored, undo, retValues} = await this._onDemandActions.processUserAction(action);
// Note: onDemand stored/undo actions are arbitrarily processed/added after normal actions
// and do not support access control.
sandboxActionBundle.stored.push(...stored.map(a => [allIndex, a] as [number, DocAction]));
sandboxActionBundle.direct.push(...stored.map(a => [allIndex, true] as [number, boolean]));
sandboxActionBundle.undo.push(...undo.map(a => [allIndex, a] as [number, DocAction]));
sandboxActionBundle.retValues.push(retValues);
}
});
}
return sandboxActionBundle;
}
/**
* Check which attachments in the _grist_Attachments metadata are actually used,
* i.e. referenced by some cell in an Attachments type column.
* Set timeDeleted to the current time on newly unused attachments,
* 'soft deleting' them so that they get cleaned up automatically from _gristsys_Files after enough time has passed.
* Set timeDeleted to null on used attachments that were previously soft deleted,
* so that undo can 'undelete' attachments.
* Returns true if any changes were made, i.e. some row(s) of _grist_Attachments were updated.
*/
public async updateUsedAttachmentsIfNeeded() {
const changes = await this.docStorage.scanAttachmentsForUsageChanges();
if (!changes.length) {
return false;
}
const rowIds = changes.map(r => r.id);
const now = Date.now() / 1000;
const timeDeleted = changes.map(r => r.used ? null : now);
const action: BulkUpdateRecord = ["BulkUpdateRecord", "_grist_Attachments", rowIds, {timeDeleted}];
// Don't use applyUserActions which may block the update action in delete-only mode
await this._applyUserActions(makeExceptionalDocSession('system'), [action]);
return true;
}
/**
* Delete unused attachments from _grist_Attachments and gristsys_Files.
* @param expiredOnly: if true, only delete attachments that were soft-deleted sufficiently long ago.
* @param options.syncUsageToDatabase: if true, schedule an update to the usage column of the docs table, if
* any unused attachments were soft-deleted. defaults to true.
* @param options.broadcastUsageToClients: if true, broadcast updated doc usage to all clients, if
* any unused attachments were soft-deleted. defaults to true.
*/
public async removeUnusedAttachments(expiredOnly: boolean, options?: UpdateUsageOptions) {
const hadChanges = await this.updateUsedAttachmentsIfNeeded();
if (hadChanges) {
await this._updateAttachmentsSize(options);
}
const rowIds = await this.docStorage.getSoftDeletedAttachmentIds(expiredOnly);
if (rowIds.length) {
const action: BulkRemoveRecord = ["BulkRemoveRecord", "_grist_Attachments", rowIds];
await this.applyUserActions(makeExceptionalDocSession('system'), [action]);
}
await this.docStorage.removeUnusedAttachments();
}
// Needed for test/server/migrations.js tests
public async testGetVersionFromDataEngine() {
return this._pyCall('get_version');
}
// Needed for test/server/lib/HostedStorageManager.ts tests
public async testKeepOpen() {
this._inactivityTimer.ping();
}
public async getSnapshots(docSession: OptDocSession, skipMetadataCache?: boolean): Promise<DocSnapshots> {
if (await this._granularAccess.hasNuancedAccess(docSession)) {
throw new Error('cannot confirm access to snapshots');
}
return this._docManager.storageManager.getSnapshots(this.docName, skipMetadataCache);
}
public async removeSnapshots(docSession: OptDocSession, snapshotIds: string[]): Promise<void> {
if (!await this.isOwner(docSession)) {
throw new Error('cannot remove snapshots, access denied');
}
return this._docManager.storageManager.removeSnapshots(this.docName, snapshotIds);
}
public async deleteActions(docSession: OptDocSession, keepN: number): Promise<void> {
if (!await this.isOwner(docSession)) {
throw new Error('cannot delete actions, access denied');
}
await this._actionHistory.deleteActions(keepN);
}
/**
* Make sure the current version of the document has been pushed to persistent
* storage.
*/
public async flushDoc(): Promise<void> {
return this._docManager.storageManager.flushDoc(this.docName);
}
public makeAccessId(userId: number|null): string|null {
return this._docManager.makeAccessId(userId);
}
/**
* Apply actions that have already occurred in the data engine to the
* database also.
*/
public async applyStoredActionsToDocStorage(docActions: DocAction[]): Promise<void> {
// When "gristifying" an sqlite database, we may take create tables and
// columns in the data engine that already exist in the sqlite database.
// During that process, _onlyAllowMetaDataActionsOnDb will be turned on,
// and we silently swallow any non-metadata actions.
if (this._onlyAllowMetaDataActionsOnDb) {
docActions = docActions.filter(a => getTableId(a).startsWith('_grist'));
}
await this.docStorage.applyStoredActions(docActions);
}
// Set a flag that controls whether user data can be changed in the database,
// or only grist-managed tables (those whose names start with _grist)
public onlyAllowMetaDataActionsOnDb(flag: boolean) {
this._onlyAllowMetaDataActionsOnDb = flag;
}
/**
* Called by Sharing manager when working on modifying the document.
* Called when DocActions have been produced from UserActions, but
* before those DocActions have been applied to the DB. GranularAccessBundle
* methods can confirm that those DocActions are legal according to any
* granular access rules.
*/
public getGranularAccessForBundle(docSession: OptDocSession, docActions: DocAction[], undo: DocAction[],
userActions: UserAction[], isDirect: boolean[],
options: ApplyUAOptions|null): GranularAccessForBundle {
this._granularAccess.getGranularAccessForBundle(docSession, docActions, undo, userActions, isDirect, options);
return this._granularAccess;
}
public async updateRowCount(rowCount: RowCounts, docSession: OptDocSession | null) {
// Up-to-date row counts are included in every DocUserAction, so we can skip broadcasting here.
await this._updateDocUsage({rowCount}, {broadcastUsageToClients: false});
log.rawInfo('Sandbox row count', {...this.getLogMeta(docSession), rowCount: rowCount.total});
await this._checkDataLimitRatio();
// Calculating data size is potentially expensive, so skip calculating it unless the
// user is currently being warned specifically about approaching or exceeding the data
// size limit, but not the row count limit; we don't need to warn about both limits at
// the same time.
if (
this.dataSizeLimitRatio > APPROACHING_LIMIT_RATIO && this.rowLimitRatio <= APPROACHING_LIMIT_RATIO ||
this.dataSizeLimitRatio > 1.0 && this.rowLimitRatio <= 1.0
) {
await this._checkDataSizeLimitRatio(docSession);
}
}
/**
* Loads an open document from DocStorage. Returns a list of the tables it contains.
*/
protected async _loadOpenDoc(docSession: OptDocSession): Promise<string[][]> {
// Check the schema version of document and sandbox, and migrate if the sandbox is newer.
const schemaVersion = SCHEMA_VERSION;
// Migrate the document if needed.
const docInfo = await this._tableMetadataLoader.fetchBulkColValuesWithoutIds('_grist_DocInfo');
const versionCol = docInfo.schemaVersion;
const docSchemaVersion = (versionCol && versionCol.length === 1 ? versionCol[0] : 0) as number;
if (docSchemaVersion < schemaVersion) {
this._log.info(docSession, "Doc needs migration from v%s to v%s", docSchemaVersion, schemaVersion);
await this._beforeMigration(docSession, 'schema', docSchemaVersion, schemaVersion);
let success: boolean = false;
try {
await this._migrate(docSession);
success = true;
} finally {
await this._afterMigration(docSession, 'schema', schemaVersion, success);
await this._tableMetadataLoader.clean(); // _grist_DocInfo may have changed.
}
} else if (docSchemaVersion > schemaVersion) {
// We do NOT attempt to down-migrate in this case. Migration code cannot down-migrate
// directly (since it doesn't know anything about newer documents). We could revert the
// migration action, but that requires merging and still may not be safe. For now, doing
// nothing seems best, as long as we follow the recommendations in migrations.py (never
// remove/modify/rename metadata tables or columns, or change their meaning).
this._log.warn(docSession, "Doc is newer (v%s) than this version of Grist (v%s); " +
"proceeding with fingers crossed", docSchemaVersion, schemaVersion);
}
// Start loading the initial meta tables which determine the document schema.
this._tableMetadataLoader.startStreamingToEngine();
this._tableMetadataLoader.startFetchingTable('_grist_Tables');
this._tableMetadataLoader.startFetchingTable('_grist_Tables_column');
// Get names of remaining tables.
const tablesParsed = await this._tableMetadataLoader.fetchBulkColValuesWithoutIds('_grist_Tables');
const tableNames = (tablesParsed.tableId as string[])
.concat(Object.keys(schema))
.filter(tableId => tableId !== '_grist_Tables' && tableId !== '_grist_Tables_column')
.sort();
// Figure out which tables are on-demand.
const onDemandMap = zipObject(tablesParsed.tableId as string[], tablesParsed.onDemand);
const onDemandNames = remove(tableNames, (t) => (onDemandMap[t] ||
(this._recoveryMode && !t.startsWith('_grist_'))));
this._log.debug(docSession, "Loading %s normal tables, skipping %s on-demand tables",
tableNames.length, onDemandNames.length);
this._log.debug(docSession, "Normal tables: %s", tableNames.join(", "));
this._log.debug(docSession, "On-demand tables: %s", onDemandNames.join(", "));
return [tableNames, onDemandNames];
}
/**
* Applies an array of user actions to the sandbox and broadcasts the results to doc's clients.
*
* @private
* @param {Object} client - The client originating this action. May be null.
* @param {Array} actions - The user actions to apply.
* @param {String} options.desc - Description of the action which overrides the default client
* description if provided. Should be used to describe bundled actions.
* @param {Int} options.otherId - Action number for the original useraction to which this undo/redo
* action applies.
* @param {Boolean} options.linkId - ActionNumber of the previous action in an undo/redo bundle.
* @returns {Promise} Promise that's resolved when all actions are applied successfully to {
* actionNum: number of the action that got recorded
* retValues: array of return values, one for each of the passed-in user actions.
* isModification: true if document was changed by one or more actions.
* }
*/
@ActiveDoc.keepDocOpen
protected async _applyUserActions(docSession: OptDocSession, actions: UserAction[],
options: ApplyUAExtendedOptions = {}): Promise<ApplyUAResult> {
const client = docSession.client;
this._log.debug(docSession, "_applyUserActions(%s, %s)%s", client, shortDesc(actions),
options.parseStrings ? ' (will parse)' : '');
this._inactivityTimer.ping(); // The doc is in active use; ping it to stay open longer.
if (options.parseStrings) {
actions = actions.map(ua => parseUserAction(ua, this.docData!));
}
if (options?.bestEffort) {
actions = await this._granularAccess.prefilterUserActions(docSession, actions, options);
}
await this._granularAccess.checkUserActions(docSession, actions);
// Create the UserActionBundle.
const action: UserActionBundle = {
info: this._makeInfo(docSession, options),
options,
userActions: actions,
};
const result: ApplyUAResult = await new Promise<ApplyUAResult>(
(resolve, reject) =>
this._sharing.addUserAction({action, docSession, resolve, reject}));
this._log.debug(docSession, "_applyUserActions returning %s", shortDesc(result));
if (result.isModification) {
this._fetchCache.clear(); // This could be more nuanced.
this._docManager.markAsChanged(this, 'edit');
}
return result;
}
private async _applyUserActionsWithExtendedOptions(docSession: OptDocSession, actions: UserAction[],
options?: ApplyUAExtendedOptions): Promise<ApplyUAResult> {
assert(Array.isArray(actions), "`actions` parameter should be an array.");
// Be careful not to sneak into user action queue before Calculate action, otherwise
// there'll be a deadlock.
await this.waitForInitialization();
if (
this.dataLimitStatus === "deleteOnly" &&
!actions.every(action => [
'RemoveTable', 'RemoveColumn', 'RemoveRecord', 'BulkRemoveRecord',
'RemoveViewSection', 'RemoveView', 'ApplyUndoActions', 'RespondToRequests',
].includes(action[0] as string))
) {
throw new Error("Document is in delete-only mode");
}
// Granular access control implemented in _applyUserActions.
return await this._applyUserActions(docSession, actions, options);
}
/**
* Create a new document file without using or initializing the data engine.
*/
@ActiveDoc.keepDocOpen
private async _createDocFile(docSession: OptDocSession, options?: {
skipInitialTable?: boolean, // If set, "Table1" will not be added.
useExisting?: boolean, // If set, an existing sqlite db is permitted.
// Useful for "gristifying" an existing db.
}): Promise<void> {
this._log.debug(docSession, "createDoc");
await this._docManager.storageManager.prepareToCreateDoc(this.docName);
await this.docStorage.createFile(options);
const sql = options?.skipInitialTable ? GRIST_DOC_SQL : GRIST_DOC_WITH_TABLE1_SQL;
await this.docStorage.exec(sql);
const timezone = docSession.browserSettings?.timezone ?? DEFAULT_TIMEZONE;
const locale = docSession.browserSettings?.locale ?? DEFAULT_LOCALE;
const documentSettings: DocumentSettings = { locale };
const pythonVersion = process.env.PYTHON_VERSION_ON_CREATION;
if (pythonVersion) {
if (pythonVersion !== '2' && pythonVersion !== '3') {
throw new Error(`PYTHON_VERSION_ON_CREATION must be 2 or 3, not: ${pythonVersion}`);
}
documentSettings.engine = (pythonVersion === '2') ? 'python2' : 'python3';
}
await this.docStorage.run('UPDATE _grist_DocInfo SET timezone = ?, documentSettings = ?',
[timezone, JSON.stringify(documentSettings)]);
}
private _makeInfo(docSession: OptDocSession, options: ApplyUAOptions = {}) {
const client = docSession.client;
const user = docSession.mode === 'system' ? 'grist' :
(client?.getProfile()?.email || '');
return {
time: Date.now(),
user,
inst: this._sharing.instanceId || "unset-inst",
desc: options.desc,
otherId: options.otherId || 0,
linkId: options.linkId || 0,
};
}
/**
* Applies all metrics from `usage` to the current document usage state.
*
* Allows specifying `options` for toggling whether usage is synced to
* the home database and/or broadcast to clients.
*/
private async _updateDocUsage(usage: Partial<DocumentUsage>, options: UpdateUsageOptions = {}) {
const {syncUsageToDatabase = true, broadcastUsageToClients = true} = options;
const oldStatus = this.dataLimitStatus;
this._docUsage = {...(this._docUsage || {}), ...usage};
if (syncUsageToDatabase) {
/* If status decreased, we'll update usage in the database with minimal delay, so site usage
* banners show up-to-date statistics. If status increased or stayed the same, we'll schedule
* a delayed update, since it's less critical for banners to update immediately. */
const didStatusDecrease = getSeverity(this.dataLimitStatus) < getSeverity(oldStatus);
this._syncDocUsageToDatabase(didStatusDecrease);
}
if (broadcastUsageToClients) {
await this._broadcastDocUsageToClients();
}
}
private _syncDocUsageToDatabase(minimizeDelay = false) {
this._docManager.storageManager.scheduleUsageUpdate(this._docName, this._docUsage, minimizeDelay);
}
private async _broadcastDocUsageToClients() {
if (this.muted || this.docClients.clientCount() === 0) { return; }
await this.docClients.broadcastDocMessage(
null,
'docUsage',
{docUsage: this.getDocUsageSummary(), product: this._product},
async (session, data) => {
return {...data, docUsage: await this.getFilteredDocUsageSummary(session)};
},
);
}
private async _updateGracePeriodStart(gracePeriodStart: Date | null) {
this._gracePeriodStart = gracePeriodStart;
if (!this._isForkOrSnapshot) {
await this.getHomeDbManager()?.setDocGracePeriodStart(this.docName, gracePeriodStart);
}
}
private async _checkDataLimitRatio() {
const exceedingDataLimit = this.dataLimitRatio > 1;
if (exceedingDataLimit && !this._gracePeriodStart) {
await this._updateGracePeriodStart(new Date());
} else if (!exceedingDataLimit && this._gracePeriodStart) {
await this._updateGracePeriodStart(null);
}
}
private async _checkDataSizeLimitRatio(docSession: OptDocSession | null) {
const start = Date.now();
const dataSizeBytes = await this._updateDataSize();
const timeToMeasure = Date.now() - start;
log.rawInfo('Data size from dbstat...', {
...this.getLogMeta(docSession),
dataSizeBytes,
timeToMeasure,
});
await this._checkDataLimitRatio();
}
/**
* Calculates the total data size in bytes, sets it in _docUsage, and returns it.
*
* Allows specifying `options` for toggling whether usage is synced to
* the home database and/or broadcast to clients.
*/
private async _updateDataSize(options?: UpdateUsageOptions): Promise<number> {
const dataSizeBytes = await this.docStorage.getDataSize();
await this._updateDocUsage({dataSizeBytes}, options);
return dataSizeBytes;
}
/**
* Prepares a single attachment by adding it DocStorage and returns a UserAction to apply.
*/
private async _prepAttachment(docSession: OptDocSession, fileData: FileUploadInfo): Promise<UserAction> {
// Check that upload size is within the configured limits.
const limit = (Number(process.env.GRIST_MAX_UPLOAD_ATTACHMENT_MB) * 1024 * 1024) || Infinity;
if (fileData.size > limit) {
throw new ApiError(`Attachments must not exceed ${byteString(limit)}`, 413);
}
let dimensions: {width?: number, height?: number} = {};
// imageSize returns an object with a width, height and type property if the file is an image.
// The width and height properties are integers representing width and height in pixels.
try {
dimensions = await bluebird.fromCallback((cb: any) => imageSize(fileData.absPath, cb));
} catch (err) {
// Non-images will fail in some way, and that's OK.
dimensions.height = 0;
dimensions.width = 0;
}
const checksum = await checksumFile(fileData.absPath);
const fileIdent = checksum + fileData.ext;
const ret: boolean = await this.docStorage.findOrAttachFile(fileData.absPath, fileIdent);
this._log.info(docSession, "addAttachment: file %s (image %sx%s) %s", fileIdent,
dimensions.width, dimensions.height, ret ? "attached" : "already exists");
return ['AddRecord', '_grist_Attachments', null, {
fileIdent,
fileName: fileData.origName,
// We used to set fileType, but it's not easily available for native types. Since it's
// also entirely unused, we just skip it until it becomes relevant.
fileSize: fileData.size,
imageHeight: dimensions.height,
imageWidth: dimensions.width,
timeUploaded: Date.now()
}];
}
/**
* If the software is newer than the document, migrate the document by fetching all tables, and
* giving them to the sandbox so that it can produce migration actions.
* TODO: We haven't figured out how to do sharing between different Grist versions that
* expect different schema versions. The returned actions at the moment aren't even shared with
* collaborators.
*/
private async _migrate(docSession: OptDocSession): Promise<void> {
const tableNames = await this.docStorage.getAllTableNames();
// Fetch only metadata tables first, and try to migrate with only those.
const tableData: {[key: string]: Buffer|null} = {};
for (const tableName of tableNames) {
if (tableName.startsWith('_grist_')) {
tableData[tableName] = await this.docStorage.fetchTable(tableName);
}
}
let docActions: DocAction[];
try {
// The last argument tells create_migrations() that only metadata is included.
docActions = await this._rawPyCall('create_migrations', tableData, true);
} catch (e) {
if (!/need all tables/.test(e.message)) {
throw e;
}
// If the migration failed because it needs all tables (i.e. involves changes to data), then
// fetch them all. TODO: This is used for some older migrations, and is relied on by tests.
// If a new migration needs this flag, more work is needed. The current approach creates
// more memory pressure than usual since full data is present in memory at once both in node
// and in Python; and it doesn't skip onDemand tables. This is liable to cause crashes.
this._log.warn(docSession, "_migrate: retrying with all tables");
for (const tableName of tableNames) {
if (!tableData[tableName] && !tableName.startsWith('_gristsys_')) {
tableData[tableName] = await this.docStorage.fetchTable(tableName);
}
}
docActions = await this._rawPyCall('create_migrations', tableData);
}
const processedTables = Object.keys(tableData);
const numSchema = countIf(processedTables, t => t.startsWith("_grist_"));
const numUser = countIf(processedTables, t => !t.startsWith("_grist_"));
this._log.info(docSession, "_migrate: applying %d migration actions (processed %s schema, %s user tables)",
docActions.length, numSchema, numUser);
docActions.forEach((action, i) => this._log.info(docSession, "_migrate: docAction %s: %s", i, shortDesc(action)));
await this.docStorage.execTransaction(() => this.docStorage.applyStoredActions(docActions));
}
/**
* Load the specified tables into the data engine.
*/
private async _loadTables(docSession: OptDocSession, tableNames: string[]) {
this._log.debug(docSession, "loading %s tables: %s", tableNames.length,
tableNames.join(", "));
// Pass the resulting array to `map`, which allows parallel processing of the tables. Database
// and DataEngine may still do things serially, but it allows them to be busy simultaneously.
await bluebird.map(tableNames, async (tableName: string) =>
this._pyCall('load_table', tableName, await this._fetchTableIfPresent(tableName)),
// How many tables to query for and push to the data engine in parallel.
{ concurrency: 3 });
return this;
}
/**
* Start loading the specified tables from the db, without waiting for completion.
* The loader can be directed to stream the tables on to the engine.
*/
private _startLoadingTables(docSession: OptDocSession, tableNames: string[]) {
this._log.debug(docSession, "starting to load %s tables: %s", tableNames.length,
tableNames.join(", "));
for (const tableId of tableNames) {
this._tableMetadataLoader.startFetchingTable(tableId);
}
}
// Fetches and returns the requested table, or null if it's missing. This allows documents to
// load with missing metadata tables (should only matter if migrations are also broken).
private async _fetchTableIfPresent(tableName: string): Promise<Buffer|null> {
try {
return await this.docStorage.fetchTable(tableName);
} catch (err) {
if (/no such table/.test(err.message)) { return null; }
throw err;
}
}
// It's a bit risky letting "Calculate" (and other formula-dependent calls) to disable
// inactivityTimer, since a user formulas with an infinite loop can disable it forever.
// TODO find a solution to this issue.
@ActiveDoc.keepDocOpen
private async _finishInitialization(
docSession: OptDocSession, pendingTableNames: string[], onDemandNames: string[], startTime: number
): Promise<void> {
try {
await this._tableMetadataLoader.wait();
await this._tableMetadataLoader.clean();
await this._loadTables(docSession, pendingTableNames);
const tableStats = await this._pyCall('get_table_stats');
log.rawInfo("Loading complete, table statistics retrieved...", {
...this.getLogMeta(docSession),
...tableStats,
num_on_demand_tables: onDemandNames.length,
});
await this._pyCall('initialize', this._options?.docUrl);
// Calculations are not associated specifically with the user opening the document.
// TODO: be careful with which users can create formulas.
await this._applyUserActions(makeExceptionalDocSession('system'), [['Calculate']]);
await this._reportDataEngineMemory();
this._fullyLoaded = true;
const endTime = Date.now();
const loadMs = endTime - startTime;
// Adjust the inactivity timer: if the load took under 1 sec, use the regular timeout; if it
// took longer, scale it up proportionately.
const closeTimeout = Math.max(loadMs, 1000) * Deps.ACTIVEDOC_TIMEOUT;
this._inactivityTimer.setDelay(closeTimeout);
this._log.debug(docSession, `loaded in ${loadMs} ms, InactivityTimer set to ${closeTimeout} ms`);
void this._initializeDocUsage(docSession);
} catch (err) {
this._fullyLoaded = true;
if (!this._shuttingDown) {
this._log.warn(docSession, "_finishInitialization stopped with %s", err);
throw new Error('ActiveDoc initialization failed: ' + String(err));
}
}
}
private async _fetchQueryFromDB(query: ServerQuery, onDemand: boolean): Promise<TableDataAction> {
// Expand query to compute formulas (or include placeholders for them).
const expandedQuery = expandQuery(query, this.docData!, onDemand);
const marshalled = await this.docStorage.fetchQuery(expandedQuery);
const table = this.docStorage.decodeMarshalledData(marshalled, query.tableId);
// Substitute in constant values for errors / placeholders.
if (expandedQuery.constants) {
for (const colId of Object.keys(expandedQuery.constants)) {
const constant = expandedQuery.constants[colId];
table[colId] = table[colId].map(() => constant);
}
}
return toTableDataAction(query.tableId, table);
}
private async _fetchQueryFromDataEngine(query: ServerQuery): Promise<TableDataAction> {
return this._pyCall('fetch_table', query.tableId, true, query.filters);
}
private async _reportDataEngineMemory() {
const now = Date.now();
if (now >= this._lastMemoryMeasurement + MEMORY_MEASUREMENT_INTERVAL_MS) {
this._lastMemoryMeasurement = now;
if (this._dataEngine && !this._shuttingDown) {
const dataEngine = await this._getEngine();
await dataEngine.reportMemoryUsage();
}
}
}
private async _initializeDocUsage(docSession: OptDocSession) {
const promises: Promise<unknown>[] = [];
// We'll defer syncing/broadcasting usage until everything is calculated.
const options = {syncUsageToDatabase: false, broadcastUsageToClients: false};
if (this._docUsage?.dataSizeBytes === undefined) {
promises.push(this._updateDataSize(options));
}
if (this._docUsage?.attachmentsSizeBytes === undefined) {
promises.push(this._updateAttachmentsSize(options));
}
if (promises.length === 0) { return; }
try {
await Promise.all(promises);
this._syncDocUsageToDatabase();
await this._broadcastDocUsageToClients();
} catch (e) {
this._log.warn(docSession, 'failed to initialize doc usage', e);
}
}
/**
* Called before a migration. Makes sure a back-up is made.
*/
private async _beforeMigration(docSession: OptDocSession, versionType: 'storage' | 'schema',
currentVersion: number, newVersion: number) {
this._migrating++;
const label = `migrate-${versionType}-last-v${currentVersion}-before-v${newVersion}`;
this._docManager.markAsChanged(this); // Give backup current time.
const location = await this._docManager.makeBackup(this, label);
this._log.info(docSession, "_beforeMigration: backup made with label %s at %s", label, location);
this.emit("backupMade", location);
}
/**
* Called after a migration.
*/
private async _afterMigration(docSession: OptDocSession, versionType: 'storage' | 'schema',
newVersion: number, success: boolean) {
this._migrating--;
// Mark as changed even if migration is not successful, out of caution.
if (!this._migrating) { this._docManager.markAsChanged(this); }
}
/**
* Call a method in the sandbox, without checking the _modificationLock. Calls to
* the sandbox are naturally serialized.
*/
private async _rawPyCall(funcName: string, ...varArgs: unknown[]): Promise<any> {
const dataEngine = await this._getEngine();
return dataEngine.pyCall(funcName, ...varArgs);
}
/**
* Call a method in the sandbox, while checking on the _modificationLock. If the
* lock is held, the call will wait until the lock is released, and then hold
* the lock itself while operating.
*/
private _pyCall(funcName: string, ...varArgs: unknown[]): Promise<any> {
return this._modificationLock.runExclusive(() => this._rawPyCall(funcName, ...varArgs));
}
private async _getEngine(): Promise<ISandbox> {
if (this._shuttingDown) { throw new Error('shutting down, data engine unavailable'); }
this._dataEngine = this._dataEngine || this._makeEngine();
return this._dataEngine;
}
private async _makeEngine(): Promise<ISandbox> {
// Figure out what kind of engine we need for this document.
let preferredPythonVersion: '2' | '3' = process.env.PYTHON_VERSION === '3' ? '3' : '2';
// Careful, migrations may not have run on this document and it may not have a
// documentSettings column. Failures are treated as lack of an engine preference.
const docInfo = await this.docStorage.get('SELECT documentSettings FROM _grist_DocInfo').catch(e => undefined);
const docSettingsString = docInfo?.documentSettings;
if (docSettingsString) {
const docSettings: DocumentSettings|undefined = safeJsonParse(docSettingsString, undefined);
const engine = docSettings?.engine;
if (engine) {
if (engine === 'python2') {
preferredPythonVersion = '2';
} else if (engine === 'python3') {
preferredPythonVersion = '3';
} else {
throw new Error(`engine type not recognized: ${engine}`);
}
}
}
return this._docManager.gristServer.create.NSandbox({
comment: this._docName,
logCalls: false,
logTimes: true,
logMeta: {docId: this._docName},
preferredPythonVersion,
sandboxOptions: {
exports: {
request: (key: string, args: SandboxRequest) => this._requests.handleSingleRequestWithCache(key, args),
guessColInfo: (values: Array<string | null>) =>
guessColInfoWithDocData(values, this.docData!),
convertFromColumn: (...args: Parameters<ReturnType<typeof convertFromColumn>>) =>
convertFromColumn(this.docData!)(...args)
}
},
});
}
/**
* Throw an error if the provided upload would exceed the total attachment filesize limit for this document.
*/
private async _assertUploadSizeBelowLimit(upload: UploadInfo) {
// Minor flaw: while we don't double-count existing duplicate files in the total size,
// we don't check here if any of the uploaded files already exist and could be left out of the calculation.
const uploadSizeBytes = sum(upload.files.map(f => f.size));
if (await this._isUploadSizeBelowLimit(uploadSizeBytes)) { return; }
// TODO probably want a nicer error message here.
throw new LimitExceededError("Exceeded attachments limit for document");
}
/**
* Returns true if an upload with size `uploadSizeBytes` won't cause attachment size
* limits to be exceeded.
*/
private async _isUploadSizeBelowLimit(uploadSizeBytes: number): Promise<boolean> {
const maxSize = this._product?.features.baseMaxAttachmentsBytesPerDocument;
if (!maxSize) { return true; }
let currentSize = this._docUsage?.attachmentsSizeBytes;
currentSize = currentSize ?? await this._updateAttachmentsSize({syncUsageToDatabase: false});
return currentSize + uploadSizeBytes <= maxSize;
}
/**
* Calculates the total attachments size in bytes, sets it in _docUsage, and returns it.
*
* Allows specifying `options` for toggling whether usage is synced to
* the home database and/or broadcast to clients.
*/
private async _updateAttachmentsSize(options?: UpdateUsageOptions): Promise<number> {
const attachmentsSizeBytes = await this.docStorage.getTotalAttachmentFileSizes();
await this._updateDocUsage({attachmentsSizeBytes}, options);
return attachmentsSizeBytes;
}
}
// Helper to initialize a sandbox action bundle with no values.
function createEmptySandboxActionBundle(): SandboxActionBundle {
return {
envelopes: [],
stored: [],
direct: [],
calc: [],
undo: [],
retValues: [],
rowCount: {total: 0},
};
}
// Helper that converts a Grist table id to a ref.
export function tableIdToRef(metaTables: { [p: string]: TableDataAction }, tableId: string) {
const [, , tableRefs, tableData] = metaTables._grist_Tables;
const tableRowIndex = tableData.tableId.indexOf(tableId);
if (tableRowIndex === -1) {
throw new ApiError(`Table not found "${tableId}"`, 404);
}
return tableRefs[tableRowIndex];
}
export function sanitizeApplyUAOptions(options?: ApplyUAOptions): ApplyUAOptions {
return pick(options||{}, ['desc', 'otherId', 'linkId', 'parseStrings']);
}