gristlabs_grist-core/app/server/lib/DocManager.ts
2023-09-05 14:27:35 -04:00

656 lines
26 KiB
TypeScript

import pidusage from '@gristlabs/pidusage';
import {Document} from 'app/gen-server/entity/Document';
import {getScope} from 'app/server/lib/requestUtils';
import * as bluebird from 'bluebird';
import {EventEmitter} from 'events';
import * as path from 'path';
import {ApiError} from 'app/common/ApiError';
import {mapSetOrClear, MapWithTTL} from 'app/common/AsyncCreate';
import {BrowserSettings} from 'app/common/BrowserSettings';
import {DocCreationInfo, DocEntry, DocListAPI, OpenDocMode, OpenLocalDocResult} from 'app/common/DocListAPI';
import {FilteredDocUsageSummary} from 'app/common/DocUsage';
import {Invite} from 'app/common/sharing';
import {tbind} from 'app/common/tbind';
import {NEW_DOCUMENT_CODE} from 'app/common/UserAPI';
import {HomeDBManager} from 'app/gen-server/lib/HomeDBManager';
import {assertAccess, Authorizer, DocAuthorizer, DummyAuthorizer, isSingleUserMode} from 'app/server/lib/Authorizer';
import {Client} from 'app/server/lib/Client';
import {
getDocSessionCachedDoc,
makeExceptionalDocSession,
makeOptDocSession,
OptDocSession
} from 'app/server/lib/DocSession';
import * as docUtils from 'app/server/lib/docUtils';
import {GristServer} from 'app/server/lib/GristServer';
import {IDocStorageManager} from 'app/server/lib/IDocStorageManager';
import {makeForkIds, makeId} from 'app/server/lib/idUtils';
import {checkAllegedGristDoc} from 'app/server/lib/serverUtils';
import log from 'app/server/lib/log';
import {ActiveDoc} from './ActiveDoc';
import {PluginManager} from './PluginManager';
import {getFileUploadInfo, globalUploadSet, makeAccessId, UploadInfo} from './uploads';
import noop = require('lodash/noop');
// A TTL in milliseconds to use for material that can easily be recomputed / refetched
// but is a bit of a burden under heavy traffic.
export const DEFAULT_CACHE_TTL = 10000;
// How long to remember that a document has been explicitly set in a
// recovery mode.
export const RECOVERY_CACHE_TTL = 30000;
/**
* DocManager keeps track of "active" Grist documents, i.e. those loaded
* in-memory, with clients connected to them.
*/
export class DocManager extends EventEmitter {
// Maps docName to promise for ActiveDoc object. Most of the time the promise
// will be long since resolved, with the resulting document cached.
private _activeDocs: Map<string, Promise<ActiveDoc>> = new Map();
// Remember recovery mode of documents.
private _inRecovery = new MapWithTTL<string, boolean>(RECOVERY_CACHE_TTL);
constructor(
public readonly storageManager: IDocStorageManager,
public readonly pluginManager: PluginManager|null,
private _homeDbManager: HomeDBManager|null,
public gristServer: GristServer
) {
super();
}
public setRecovery(docId: string, recovery: boolean) {
this._inRecovery.set(docId, recovery);
}
// attach a home database to the DocManager. During some tests, it
// is awkward to have this set up at the point of construction.
public testSetHomeDbManager(dbManager: HomeDBManager) {
this._homeDbManager = dbManager;
}
public getHomeDbManager() {
return this._homeDbManager;
}
/**
* Returns an implementation of the DocListAPI for the given Client object.
*/
public getDocListAPIImpl(client: Client): DocListAPI {
return {
getDocList: tbind(this.listDocs, this, client),
createNewDoc: tbind(this.createNewDoc, this, client),
importSampleDoc: tbind(this.importSampleDoc, this, client),
importDoc: tbind(this.importDoc, this, client),
deleteDoc: tbind(this.deleteDoc, this, client),
renameDoc: tbind(this.renameDoc, this, client),
openDoc: tbind(this.openDoc, this, client),
};
}
/**
* Returns the number of currently open docs.
*/
public numOpenDocs(): number {
return this._activeDocs.size;
}
/**
* Returns a Map from docId to number of connected clients for each doc.
*/
public async getDocClientCounts(): Promise<Map<string, number>> {
const values = await Promise.all(Array.from(this._activeDocs.values(), async (adocPromise) => {
const adoc = await adocPromise;
return [adoc.docName, adoc.docClients.clientCount()] as [string, number];
}));
return new Map(values);
}
/**
* Returns a promise for all known Grist documents and document invites to show in the doc list.
*/
public async listDocs(client: Client): Promise<{docs: DocEntry[], docInvites: DocEntry[]}> {
const docs = await this.storageManager.listDocs();
return {docs, docInvites: []};
}
/**
* Returns a promise for invites to docs which have not been downloaded.
*/
public async getLocalInvites(client: Client): Promise<Invite[]> {
return [];
}
/**
* Creates a new document, fetches it, and adds a table to it.
* @returns {Promise:String} The name of the new document.
*/
public async createNewDoc(client: Client): Promise<string> {
log.debug('DocManager.createNewDoc');
const docSession = makeExceptionalDocSession('nascent', {client});
return this.createNamedDoc(docSession, 'Untitled');
}
public async createNamedDoc(docSession: OptDocSession, docId: string): Promise<string> {
const activeDoc: ActiveDoc = await this.createNewEmptyDoc(docSession, docId);
await activeDoc.addInitialTable(docSession);
return activeDoc.docName;
}
/**
* Creates a new document, fetches it, and adds a table to it.
* @param {String} sampleDocName: Doc name of a sample document.
* @returns {Promise:String} The name of the new document.
*/
public async importSampleDoc(client: Client, sampleDocName: string): Promise<string> {
const sourcePath = this.storageManager.getSampleDocPath(sampleDocName);
if (!sourcePath) {
throw new Error(`no path available to sample ${sampleDocName}`);
}
log.info('DocManager.importSampleDoc importing', sourcePath);
const basenameHint = path.basename(sampleDocName);
const targetName = await docUtils.createNumbered(basenameHint, '-',
(name: string) => docUtils.createExclusive(this.storageManager.getPath(name)));
const targetPath = this.storageManager.getPath(targetName);
log.info('DocManager.importSampleDoc saving as', targetPath);
await docUtils.copyFile(sourcePath, targetPath);
return targetName;
}
/**
* Processes an upload, containing possibly multiple files, to create a single new document, and
* returns the new document's name/id.
*/
public async importDoc(client: Client, uploadId: number): Promise<string> {
const userId = this._homeDbManager ? await client.requireUserId(this._homeDbManager) : null;
const result = await this._doImportDoc(makeOptDocSession(client),
globalUploadSet.getUploadInfo(uploadId, this.makeAccessId(userId)), {naming: 'classic'});
return result.id;
}
// Import a document, assigning it a unique id distinct from its title. Cleans up uploadId.
public importDocWithFreshId(docSession: OptDocSession, userId: number, uploadId: number): Promise<DocCreationInfo> {
const accessId = this.makeAccessId(userId);
return this._doImportDoc(docSession, globalUploadSet.getUploadInfo(uploadId, accessId),
{naming: 'saved'});
}
/**
* Do an import targeted at a specific workspace.
*
* `userId` should correspond to the user making the request.
*
* If workspaceId is omitted, an unsaved doc unassociated with a specific workspace
* will be created.
*
* Cleans up `uploadId` and returns creation info about the imported doc.
*/
public async importDocToWorkspace(options: {
userId: number,
uploadId: number,
documentName?: string,
workspaceId?: number,
browserSettings?: BrowserSettings,
}): Promise<DocCreationInfo> {
if (!this._homeDbManager) { throw new Error("HomeDbManager not available"); }
const {userId, uploadId, documentName, workspaceId, browserSettings} = options;
const accessId = this.makeAccessId(userId);
const docSession = makeExceptionalDocSession('nascent', {browserSettings});
const register = async (docId: string, uploadBaseFilename: string) => {
if (workspaceId === undefined || !this._homeDbManager) { return; }
const queryResult = await this._homeDbManager.addDocument(
{userId},
workspaceId,
{name: documentName ?? uploadBaseFilename},
docId
);
if (queryResult.status !== 200) {
// TODO The ready-to-add document is not yet in storageManager, but is in the filesystem. It
// should get cleaned up in case of error here.
throw new ApiError(queryResult.errMessage || 'unable to add imported document', queryResult.status);
}
};
return this._doImportDoc(docSession,
globalUploadSet.getUploadInfo(uploadId, accessId), {
naming: workspaceId ? 'saved' : 'unsaved',
register,
userId,
});
// The imported document is associated with the worker that did the import.
// We could break that association (see /api/docs/:docId/assign for how) if
// we start using dedicated import workers.
}
/**
* Imports file at filepath into the app by creating a new document and adding the file to
* the documents directory.
* @param {String} filepath - Path to the current location of the file on the server.
* @returns {Promise:String} The name of the new document.
*/
public async importNewDoc(filepath: string): Promise<DocCreationInfo> {
const uploadId = globalUploadSet.registerUpload([await getFileUploadInfo(filepath)], null, noop, null);
return await this._doImportDoc(makeOptDocSession(null), globalUploadSet.getUploadInfo(uploadId, null),
{naming: 'classic'});
}
/**
* Deletes the Grist files and directories for a given document name.
* @param {String} docName - The name of the Grist document to be deleted.
* @returns {Promise:String} The name of the deleted Grist document.
*
*/
public async deleteDoc(client: Client|null, docName: string, deletePermanently: boolean): Promise<string> {
log.debug('DocManager.deleteDoc starting for %s', docName);
const docPromise = this._activeDocs.get(docName);
if (docPromise) {
// Call activeDoc's shutdown method first, to remove the doc from internal structures.
const doc: ActiveDoc = await docPromise;
log.debug('DocManager.deleteDoc starting activeDoc shutdown', docName);
await doc.shutdown();
}
await this.storageManager.deleteDoc(docName, deletePermanently);
return docName;
}
/**
* Interrupt all clients, forcing them to reconnect. Handy when a document has changed
* status in some major way that affects access rights, such as being deleted.
*/
public async interruptDocClients(docName: string) {
const docPromise = this._activeDocs.get(docName);
if (docPromise) {
const doc: ActiveDoc = await docPromise;
doc.docClients.interruptAllClients();
}
}
/**
* Opens a document. Adds the client as a subscriber to the document, and fetches and returns the
* document's metadata.
* @returns {Promise:Object} An object with properties:
* `docFD` - the descriptor to use in further methods and messages about this document,
* `doc` - the object with metadata tables.
*/
public async openDoc(client: Client, docId: string,
openMode: OpenDocMode = 'default',
linkParameters: Record<string, string> = {}): Promise<OpenLocalDocResult> {
let auth: Authorizer;
const dbManager = this._homeDbManager;
if (!isSingleUserMode()) {
if (!dbManager) { throw new Error("HomeDbManager not available"); }
// Sets up authorization of the document.
const org = client.getOrg();
if (!org) { throw new Error('Documents can only be opened in the context of a specific organization'); }
const userId = await client.getUserId(dbManager) || dbManager.getAnonymousUserId();
const userRef = await client.getUserRef(dbManager);
// We use docId in the key, and disallow urlId, so we can be sure that we are looking at the
// right doc when we re-query the DB over the life of the websocket.
const key = {urlId: docId, userId, org};
log.debug("DocManager.openDoc Authorizer key", key);
const docAuth = await dbManager.getDocAuthCached(key);
assertAccess('viewers', docAuth);
if (docAuth.docId !== docId) {
// The only plausible way to end up here is if we called openDoc with a urlId rather
// than a docId.
throw new Error(`openDoc expected docId ${docAuth.docId} not urlId ${docId}`);
}
auth = new DocAuthorizer({
dbManager,
key,
openMode,
linkParameters,
userRef,
docAuth,
profile: client.getProfile() || undefined
});
} else {
log.debug(`DocManager.openDoc not using authorization for ${docId} because GRIST_SINGLE_USER`);
auth = new DummyAuthorizer('owners', docId);
}
// Fetch the document, and continue when we have the ActiveDoc (which may be immediately).
const docSessionPrecursor = makeOptDocSession(client);
docSessionPrecursor.authorizer = auth;
return this._withUnmutedDoc(docSessionPrecursor, docId, async () => {
const activeDoc: ActiveDoc = await this.fetchDoc(docSessionPrecursor, docId);
// Get a fresh DocSession object.
const docSession = activeDoc.addClient(client, auth);
// If opening in (pre-)fork mode, check if it is appropriate to treat the user as
// an owner for granular access purposes.
if (openMode === 'fork') {
if (await activeDoc.canForkAsOwner(docSession)) {
// Mark the session specially and flush any cached access
// information. It is easier to make this a property of the
// session than to try computing it later in the heat of
// battle, since it introduces a loop where a user property
// (user.Access) depends on evaluating rules, but rules need
// the user properties in order to be evaluated. It is also
// somewhat justifiable even if permissions change later on
// the theory that the fork is theoretically happening at this
// instance).
docSession.forkingAsOwner = true;
activeDoc.flushAccess(docSession);
} else {
// TODO: it would be kind to pass on a message to the client
// to let them know they won't be able to fork. They'll get
// an error when they make their first change. But currently
// we only have the blunt instrument of throwing an error,
// which would prevent access to the document entirely.
}
}
const [metaTables, recentActions, userOverride] = await Promise.all([
activeDoc.fetchMetaTables(docSession),
activeDoc.getRecentMinimalActions(docSession),
activeDoc.getUserOverride(docSession),
]);
let docUsage: FilteredDocUsageSummary | undefined;
try {
docUsage = await activeDoc.getFilteredDocUsageSummary(docSession);
} catch (e) {
log.warn("DocManager.openDoc failed to get doc usage", e);
}
const result: OpenLocalDocResult = {
docFD: docSession.fd,
clientId: docSession.client.clientId,
doc: metaTables,
log: recentActions,
recoveryMode: activeDoc.recoveryMode,
userOverride,
docUsage,
};
if (!activeDoc.muted) {
this.emit('open-doc', this.storageManager.getPath(activeDoc.docName));
}
return {activeDoc, result};
});
}
/**
* Shut down all open docs. This is called, in particular, on server shutdown.
*/
public async shutdownAll() {
await Promise.all(Array.from(
this._activeDocs.values(),
adocPromise => adocPromise.then(async adoc => {
log.debug('DocManager.shutdownAll starting activeDoc shutdown', adoc.docName);
await adoc.shutdown();
})));
try {
await this.storageManager.closeStorage();
} catch (err) {
log.error('DocManager had problem shutting down storage: %s', err.message);
}
// Clear the setInterval that the pidusage module sets up internally.
pidusage.clear();
}
// Access a document by name.
public getActiveDoc(docName: string): Promise<ActiveDoc>|undefined {
return this._activeDocs.get(docName);
}
public removeActiveDoc(activeDoc: ActiveDoc): void {
this._activeDocs.delete(activeDoc.docName);
}
public async renameDoc(client: Client, oldName: string, newName: string): Promise<void> {
log.debug('DocManager.renameDoc %s -> %s', oldName, newName);
const docPromise = this._activeDocs.get(oldName);
if (docPromise) {
const adoc: ActiveDoc = await docPromise;
await adoc.renameDocTo({client}, newName);
this._activeDocs.set(newName, docPromise);
this._activeDocs.delete(oldName);
} else {
await this.storageManager.renameDoc(oldName, newName);
}
}
public markAsChanged(activeDoc: ActiveDoc, reason?: 'edit') {
// Ignore changes if document is muted or in the middle of a migration.
if (!activeDoc.muted && !activeDoc.isMigrating()) {
this.storageManager.markAsChanged(activeDoc.docName, reason);
}
}
public async makeBackup(activeDoc: ActiveDoc, name: string): Promise<string> {
if (activeDoc.muted) { throw new Error('Document is disabled'); }
return this.storageManager.makeBackup(activeDoc.docName, name);
}
/**
* Helper function for creating a new empty document that also emits an event.
* @param docSession The client session.
* @param basenameHint Suggested base name to use (no directory, no extension).
*/
public async createNewEmptyDoc(docSession: OptDocSession, basenameHint: string): Promise<ActiveDoc> {
const docName = await this._createNewDoc(basenameHint);
return mapSetOrClear(this._activeDocs, docName,
this._createActiveDoc(docSession, docName)
.then(newDoc => newDoc.createEmptyDoc(docSession)));
}
/**
* Fetches an ActiveDoc object. Used by openDoc. If ActiveDoc is muted (for safe closing),
* wait for another.
*/
public async fetchDoc(docSession: OptDocSession, docName: string,
wantRecoveryMode?: boolean): Promise<ActiveDoc> {
log.debug('DocManager.fetchDoc', docName);
return this._withUnmutedDoc(docSession, docName, async () => {
const activeDoc = await this._fetchPossiblyMutedDoc(docSession, docName, wantRecoveryMode);
return {activeDoc, result: activeDoc};
});
}
public makeAccessId(userId: number|null): string|null {
return makeAccessId(this.gristServer, userId);
}
public isAnonymous(userId: number): boolean {
if (!this._homeDbManager) { throw new Error("HomeDbManager not available"); }
return userId === this._homeDbManager.getAnonymousUserId();
}
/**
* Perform the supplied operation and return its result - unless the activeDoc it returns
* is found to be muted, in which case we retry.
*/
private async _withUnmutedDoc<T>(docSession: OptDocSession, docName: string,
op: () => Promise<{ result: T, activeDoc: ActiveDoc }>): Promise<T> {
// Repeat until we acquire an ActiveDoc that is not muted (shutting down).
for (;;) {
const { result, activeDoc } = await op();
if (!activeDoc.muted) { return result; }
log.debug('DocManager._withUnmutedDoc waiting because doc is muted', docName);
await bluebird.delay(1000);
}
}
// Like fetchDoc(), but doesn't check if ActiveDoc returned is unmuted.
private async _fetchPossiblyMutedDoc(docSession: OptDocSession, docName: string,
wantRecoveryMode?: boolean): Promise<ActiveDoc> {
if (this._activeDocs.has(docName) && wantRecoveryMode !== undefined) {
const activeDoc = await this._activeDocs.get(docName);
if (activeDoc && activeDoc.recoveryMode !== wantRecoveryMode && await activeDoc.isOwner(docSession)) {
// shutting doc down to have a chance to re-open in the correct mode.
// TODO: there could be a battle with other users opening it in a different mode.
log.debug('DocManager._fetchPossiblyMutedDoc starting activeDoc shutdown', docName);
await activeDoc.shutdown();
}
}
let activeDoc: ActiveDoc;
if (!this._activeDocs.has(docName)) {
activeDoc = await mapSetOrClear(
this._activeDocs, docName,
this._createActiveDoc(docSession, docName, wantRecoveryMode ?? this._inRecovery.get(docName))
.then(newDoc => {
// Propagate backupMade events from newly opened activeDocs (consolidate all to DocMan)
newDoc.on('backupMade', (bakPath: string) => {
this.emit('backupMade', bakPath);
});
return newDoc.loadDoc(docSession);
}));
} else {
activeDoc = await this._activeDocs.get(docName)!;
}
return activeDoc;
}
private async _getDoc(docSession: OptDocSession, docName: string) {
const cachedDoc = getDocSessionCachedDoc(docSession);
if (cachedDoc) {
return cachedDoc;
}
let db: HomeDBManager;
try {
// For the sake of existing tests, get the db from gristServer where it may not exist and we should give up,
// rather than using this._homeDbManager which may exist and then it turns out the document itself doesn't.
db = this.gristServer.getHomeDBManager();
} catch (e) {
if (e.message === "no db") {
return;
}
throw e;
}
if (docSession.req) {
const scope = getScope(docSession.req);
if (scope.urlId) {
return db.getDoc(scope);
}
}
return await db.getRawDocById(docName);
}
private async _getDocUrls(doc: Document) {
try {
return {
docUrl: await this.gristServer.getResourceUrl(doc),
docApiUrl: await this.gristServer.getResourceUrl(doc, 'api'),
};
} catch (e) {
// If there is no home url, we cannot construct links. Accept this, for the benefit
// of legacy tests.
if (e.message !== "need APP_HOME_URL") {
throw e;
}
}
}
private async _createActiveDoc(docSession: OptDocSession, docName: string, safeMode?: boolean) {
const doc = await this._getDoc(docSession, docName);
// Get URL for document for use with SELF_HYPERLINK().
const docUrls = doc && await this._getDocUrls(doc);
return new ActiveDoc(this, docName, {...docUrls, safeMode, doc});
}
/**
* Helper that implements doing the actual import of an uploaded set of files to create a new
* document.
*/
private async _doImportDoc(docSession: OptDocSession, uploadInfo: UploadInfo,
options: {
naming: 'classic'|'saved'|'unsaved',
register?: (docId: string, uploadBaseFilename: string) => Promise<void>,
userId?: number,
}): Promise<DocCreationInfo> {
try {
const fileCount = uploadInfo.files.length;
const hasGristDoc = Boolean(uploadInfo.files.find(f => extname(f.origName) === '.grist'));
if (hasGristDoc && fileCount > 1) {
throw new Error('Grist docs must be uploaded individually');
}
const first = uploadInfo.files[0].origName;
const ext = extname(first);
const basename = path.basename(first, ext).trim() || "Untitled upload";
let id: string;
switch (options.naming) {
case 'saved':
id = makeId();
break;
case 'unsaved': {
const {userId} = options;
if (!userId) { throw new Error('unsaved import requires userId'); }
if (!this._homeDbManager) { throw new Error("HomeDbManager not available"); }
const isAnonymous = userId === this._homeDbManager.getAnonymousUserId();
id = makeForkIds({userId, isAnonymous, trunkDocId: NEW_DOCUMENT_CODE,
trunkUrlId: NEW_DOCUMENT_CODE}).docId;
break;
}
case 'classic':
id = basename;
break;
default:
throw new Error('naming mode not recognized');
}
await options.register?.(id, basename);
if (ext === '.grist') {
// If the import is a grist file, copy it to the docs directory.
// TODO: We should be skeptical of the upload file to close a possible
// security vulnerability. See https://phab.getgrist.com/T457.
const docName = await this._createNewDoc(id);
const docPath: string = this.storageManager.getPath(docName);
const srcDocPath = uploadInfo.files[0].absPath;
await checkAllegedGristDoc(docSession, srcDocPath);
await docUtils.copyFile(srcDocPath, docPath);
// Go ahead and claim this document. If we wanted to serve it
// from a potentially different worker, we'd call addToStorage(docName)
// instead (we used to do this). The upload should already be happening
// on a randomly assigned worker due to the special treatment of the
// 'import' assignmentId.
await this.storageManager.prepareLocalDoc(docName);
this.storageManager.markAsChanged(docName, 'edit');
return {title: basename, id: docName};
} else {
const doc = await this.createNewEmptyDoc(docSession, id);
await doc.oneStepImport(docSession, uploadInfo);
return {title: basename, id: doc.docName};
}
} catch (err) {
throw new ApiError(err.message, err.status || 400, {
tips: [{action: 'ask-for-help', message: 'Ask for help'}]
});
} finally {
await globalUploadSet.cleanup(uploadInfo.uploadId);
}
}
// Returns the name for a new doc, based on basenameHint.
private async _createNewDoc(basenameHint: string): Promise<string> {
const docName: string = await docUtils.createNumbered(basenameHint, '-', async (name: string) => {
if (this._activeDocs.has(name)) {
throw new Error("Existing entry in active docs for: " + name);
}
return docUtils.createExclusive(this.storageManager.getPath(name));
});
log.debug('DocManager._createNewDoc picked name', docName);
await this.pluginManager?.pluginsLoaded;
return docName;
}
}
// Returns the extension of fpath (from last occurrence of "." to the end of the string), even
// when the basename is empty or starts with a period.
function extname(fpath: string): string {
return path.extname("X" + fpath);
}