396 lines
16 KiB
JavaScript
396 lines
16 KiB
JavaScript
"use strict";
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var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
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if (k2 === undefined) k2 = k;
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var desc = Object.getOwnPropertyDescriptor(m, k);
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if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
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desc = { enumerable: true, get: function() { return m[k]; } };
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}
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Object.defineProperty(o, k2, desc);
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}) : (function(o, m, k, k2) {
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if (k2 === undefined) k2 = k;
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o[k2] = m[k];
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}));
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var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
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Object.defineProperty(o, "default", { enumerable: true, value: v });
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}) : function(o, v) {
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o["default"] = v;
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});
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var __importStar = (this && this.__importStar) || function (mod) {
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if (mod && mod.__esModule) return mod;
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var result = {};
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if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
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__setModuleDefault(result, mod);
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return result;
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};
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var __exportStar = (this && this.__exportStar) || function(m, exports) {
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for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports, p)) __createBinding(exports, m, p);
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};
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.WsTransaction = exports.WsClient = exports._createClient = exports.createClient = void 0;
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const hrana = __importStar(require("@libsql/hrana-client"));
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const api_1 = require("@libsql/core/api");
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const config_1 = require("@libsql/core/config");
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const hrana_js_1 = require("./hrana.js");
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const sql_cache_js_1 = require("./sql_cache.js");
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const uri_1 = require("@libsql/core/uri");
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const util_1 = require("@libsql/core/util");
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const promise_limit_1 = __importDefault(require("promise-limit"));
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__exportStar(require("@libsql/core/api"), exports);
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function createClient(config) {
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return _createClient((0, config_1.expandConfig)(config, false));
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}
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exports.createClient = createClient;
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/** @private */
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function _createClient(config) {
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if (config.scheme !== "wss" && config.scheme !== "ws") {
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throw new api_1.LibsqlError('The WebSocket client supports only "libsql:", "wss:" and "ws:" URLs, ' +
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`got ${JSON.stringify(config.scheme + ":")}. For more information, please read ${util_1.supportedUrlLink}`, "URL_SCHEME_NOT_SUPPORTED");
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}
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if (config.encryptionKey !== undefined) {
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throw new api_1.LibsqlError("Encryption key is not supported by the remote client.", "ENCRYPTION_KEY_NOT_SUPPORTED");
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}
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if (config.scheme === "ws" && config.tls) {
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throw new api_1.LibsqlError(`A "ws:" URL cannot opt into TLS by using ?tls=1`, "URL_INVALID");
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}
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else if (config.scheme === "wss" && !config.tls) {
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throw new api_1.LibsqlError(`A "wss:" URL cannot opt out of TLS by using ?tls=0`, "URL_INVALID");
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}
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const url = (0, uri_1.encodeBaseUrl)(config.scheme, config.authority, config.path);
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let client;
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try {
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client = hrana.openWs(url, config.authToken);
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}
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catch (e) {
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if (e instanceof hrana.WebSocketUnsupportedError) {
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const suggestedScheme = config.scheme === "wss" ? "https" : "http";
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const suggestedUrl = (0, uri_1.encodeBaseUrl)(suggestedScheme, config.authority, config.path);
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throw new api_1.LibsqlError("This environment does not support WebSockets, please switch to the HTTP client by using " +
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`a "${suggestedScheme}:" URL (${JSON.stringify(suggestedUrl)}). ` +
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`For more information, please read ${util_1.supportedUrlLink}`, "WEBSOCKETS_NOT_SUPPORTED");
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}
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throw (0, hrana_js_1.mapHranaError)(e);
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}
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return new WsClient(client, url, config.authToken, config.intMode, config.concurrency);
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}
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exports._createClient = _createClient;
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const maxConnAgeMillis = 60 * 1000;
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const sqlCacheCapacity = 100;
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class WsClient {
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#url;
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#authToken;
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#intMode;
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// State of the current connection. The `hrana.WsClient` inside may be closed at any moment due to an
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// asynchronous error.
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#connState;
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// If defined, this is a connection that will be used in the future, once it is ready.
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#futureConnState;
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closed;
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protocol;
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#isSchemaDatabase;
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#promiseLimitFunction;
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/** @private */
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constructor(client, url, authToken, intMode, concurrency) {
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this.#url = url;
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this.#authToken = authToken;
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this.#intMode = intMode;
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this.#connState = this.#openConn(client);
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this.#futureConnState = undefined;
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this.closed = false;
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this.protocol = "ws";
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this.#promiseLimitFunction = (0, promise_limit_1.default)(concurrency);
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}
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async limit(fn) {
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return this.#promiseLimitFunction(fn);
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}
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async execute(stmtOrSql, args) {
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let stmt;
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if (typeof stmtOrSql === "string") {
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stmt = {
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sql: stmtOrSql,
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args: args || [],
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};
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}
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else {
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stmt = stmtOrSql;
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}
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return this.limit(async () => {
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const streamState = await this.#openStream();
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try {
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const hranaStmt = (0, hrana_js_1.stmtToHrana)(stmt);
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// Schedule all operations synchronously, so they will be pipelined and executed in a single
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// network roundtrip.
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streamState.conn.sqlCache.apply([hranaStmt]);
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const hranaRowsPromise = streamState.stream.query(hranaStmt);
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streamState.stream.closeGracefully();
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const hranaRowsResult = await hranaRowsPromise;
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return (0, hrana_js_1.resultSetFromHrana)(hranaRowsResult);
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}
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catch (e) {
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throw (0, hrana_js_1.mapHranaError)(e);
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}
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finally {
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this._closeStream(streamState);
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}
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});
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}
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async batch(stmts, mode = "deferred") {
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return this.limit(async () => {
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const streamState = await this.#openStream();
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try {
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const normalizedStmts = stmts.map((stmt) => {
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if (Array.isArray(stmt)) {
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return {
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sql: stmt[0],
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args: stmt[1] || [],
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};
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}
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return stmt;
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});
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const hranaStmts = normalizedStmts.map(hrana_js_1.stmtToHrana);
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const version = await streamState.conn.client.getVersion();
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// Schedule all operations synchronously, so they will be pipelined and executed in a single
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// network roundtrip.
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streamState.conn.sqlCache.apply(hranaStmts);
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const batch = streamState.stream.batch(version >= 3);
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const resultsPromise = (0, hrana_js_1.executeHranaBatch)(mode, version, batch, hranaStmts);
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const results = await resultsPromise;
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return results;
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}
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catch (e) {
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throw (0, hrana_js_1.mapHranaError)(e);
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}
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finally {
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this._closeStream(streamState);
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}
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});
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}
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async migrate(stmts) {
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return this.limit(async () => {
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const streamState = await this.#openStream();
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try {
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const hranaStmts = stmts.map(hrana_js_1.stmtToHrana);
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const version = await streamState.conn.client.getVersion();
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// Schedule all operations synchronously, so they will be pipelined and executed in a single
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// network roundtrip.
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const batch = streamState.stream.batch(version >= 3);
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const resultsPromise = (0, hrana_js_1.executeHranaBatch)("deferred", version, batch, hranaStmts, true);
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const results = await resultsPromise;
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return results;
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}
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catch (e) {
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throw (0, hrana_js_1.mapHranaError)(e);
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}
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finally {
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this._closeStream(streamState);
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}
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});
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}
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async transaction(mode = "write") {
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return this.limit(async () => {
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const streamState = await this.#openStream();
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try {
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const version = await streamState.conn.client.getVersion();
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// the BEGIN statement will be batched with the first statement on the transaction to save a
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// network roundtrip
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return new WsTransaction(this, streamState, mode, version);
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}
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catch (e) {
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this._closeStream(streamState);
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throw (0, hrana_js_1.mapHranaError)(e);
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}
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});
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}
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async executeMultiple(sql) {
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return this.limit(async () => {
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const streamState = await this.#openStream();
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try {
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// Schedule all operations synchronously, so they will be pipelined and executed in a single
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// network roundtrip.
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const promise = streamState.stream.sequence(sql);
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streamState.stream.closeGracefully();
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await promise;
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}
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catch (e) {
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throw (0, hrana_js_1.mapHranaError)(e);
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}
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finally {
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this._closeStream(streamState);
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}
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});
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}
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sync() {
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throw new api_1.LibsqlError("sync not supported in ws mode", "SYNC_NOT_SUPPORTED");
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}
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async #openStream() {
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if (this.closed) {
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throw new api_1.LibsqlError("The client is closed", "CLIENT_CLOSED");
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}
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const now = new Date();
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const ageMillis = now.valueOf() - this.#connState.openTime.valueOf();
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if (ageMillis > maxConnAgeMillis &&
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this.#futureConnState === undefined) {
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// The existing connection is too old, let's open a new one.
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const futureConnState = this.#openConn();
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this.#futureConnState = futureConnState;
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// However, if we used `futureConnState` immediately, we would introduce additional latency,
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// because we would have to wait for the WebSocket handshake to complete, even though we may a
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// have perfectly good existing connection in `this.#connState`!
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//
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// So we wait until the `hrana.Client.getVersion()` operation completes (which happens when the
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// WebSocket hanshake completes), and only then we replace `this.#connState` with
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// `futureConnState`, which is stored in `this.#futureConnState` in the meantime.
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futureConnState.client.getVersion().then((_version) => {
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if (this.#connState !== futureConnState) {
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// We need to close `this.#connState` before we replace it. However, it is possible
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// that `this.#connState` has already been replaced: see the code below.
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if (this.#connState.streamStates.size === 0) {
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this.#connState.client.close();
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}
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else {
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// If there are existing streams on the connection, we must not close it, because
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// these streams would be broken. The last stream to be closed will also close the
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// connection in `_closeStream()`.
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}
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}
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this.#connState = futureConnState;
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this.#futureConnState = undefined;
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}, (_e) => {
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// If the new connection could not be established, let's just ignore the error and keep
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// using the existing connection.
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this.#futureConnState = undefined;
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});
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}
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if (this.#connState.client.closed) {
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// An error happened on this connection and it has been closed. Let's try to seamlessly reconnect.
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try {
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if (this.#futureConnState !== undefined) {
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// We are already in the process of opening a new connection, so let's just use it
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// immediately.
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this.#connState = this.#futureConnState;
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}
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else {
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this.#connState = this.#openConn();
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}
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}
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catch (e) {
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throw (0, hrana_js_1.mapHranaError)(e);
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}
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}
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const connState = this.#connState;
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try {
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// Now we wait for the WebSocket handshake to complete (if it hasn't completed yet). Note that
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// this does not increase latency, because any messages that we would send on the WebSocket before
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// the handshake would be queued until the handshake is completed anyway.
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if (connState.useSqlCache === undefined) {
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connState.useSqlCache =
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(await connState.client.getVersion()) >= 2;
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if (connState.useSqlCache) {
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connState.sqlCache.capacity = sqlCacheCapacity;
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}
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}
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const stream = connState.client.openStream();
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stream.intMode = this.#intMode;
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const streamState = { conn: connState, stream };
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connState.streamStates.add(streamState);
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return streamState;
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}
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catch (e) {
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throw (0, hrana_js_1.mapHranaError)(e);
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}
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}
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#openConn(client) {
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try {
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client ??= hrana.openWs(this.#url, this.#authToken);
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return {
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client,
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useSqlCache: undefined,
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sqlCache: new sql_cache_js_1.SqlCache(client, 0),
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openTime: new Date(),
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streamStates: new Set(),
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};
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}
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catch (e) {
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throw (0, hrana_js_1.mapHranaError)(e);
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}
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}
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async reconnect() {
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try {
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for (const st of Array.from(this.#connState.streamStates)) {
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try {
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st.stream.close();
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}
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catch { }
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}
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this.#connState.client.close();
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}
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catch { }
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if (this.#futureConnState) {
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try {
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this.#futureConnState.client.close();
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}
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catch { }
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this.#futureConnState = undefined;
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}
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const next = this.#openConn();
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const version = await next.client.getVersion();
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next.useSqlCache = version >= 2;
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if (next.useSqlCache) {
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next.sqlCache.capacity = sqlCacheCapacity;
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}
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this.#connState = next;
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this.closed = false;
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}
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_closeStream(streamState) {
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streamState.stream.close();
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const connState = streamState.conn;
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connState.streamStates.delete(streamState);
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if (connState.streamStates.size === 0 &&
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connState !== this.#connState) {
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// We are not using this connection anymore and this is the last stream that was using it, so we
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// must close it now.
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connState.client.close();
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}
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}
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close() {
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this.#connState.client.close();
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this.closed = true;
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if (this.#futureConnState) {
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try {
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this.#futureConnState.client.close();
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}
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catch { }
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this.#futureConnState = undefined;
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}
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this.closed = true;
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}
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}
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exports.WsClient = WsClient;
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class WsTransaction extends hrana_js_1.HranaTransaction {
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#client;
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#streamState;
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/** @private */
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constructor(client, state, mode, version) {
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super(mode, version);
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this.#client = client;
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this.#streamState = state;
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}
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/** @private */
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_getStream() {
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return this.#streamState.stream;
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}
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/** @private */
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_getSqlCache() {
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return this.#streamState.conn.sqlCache;
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}
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close() {
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this.#client._closeStream(this.#streamState);
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}
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get closed() {
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return this.#streamState.stream.closed;
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}
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}
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exports.WsTransaction = WsTransaction;
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