@tableau/taco-toolkit
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Tableau Connector Toolkit
381 lines • 28.4 kB
JavaScript
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
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function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
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if (t[2]) _.ops.pop();
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op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __read = (this && this.__read) || function (o, n) {
var m = typeof Symbol === "function" && o[Symbol.iterator];
if (!m) return o;
var i = m.call(o), r, ar = [], e;
try {
while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
}
catch (error) { e = { error: error }; }
finally {
try {
if (r && !r.done && (m = i["return"])) m.call(i);
}
finally { if (e) throw e.error; }
}
return ar;
};
var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
if (ar || !(i in from)) {
if (!ar) ar = Array.prototype.slice.call(from, 0, i);
ar[i] = from[i];
}
}
return to.concat(ar || Array.prototype.slice.call(from));
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.sortColumnHeaderList = void 0;
var express_1 = __importDefault(require("express"));
var node_http_1 = __importDefault(require("node:http"));
var eps_http_header_1 = require("../../shared/enums/eps-http-header");
var eps_logger_1 = require("../logging/eps-logger");
var api_utils_1 = require("../utils/api-utils");
var server_utils_1 = require("../utils/server-utils");
var extractor_api_utils_1 = require("./extractor-api-utils");
var ExtractorApi = /** @class */ (function () {
function ExtractorApi(callerId, epsInstanceId, extractorId, connectionId, health, tableManager) {
this.callerId = callerId;
this.epsInstanceId = epsInstanceId;
this.extractorId = extractorId;
this.connectionId = connectionId;
this.tableManager = tableManager;
this.app = (0, express_1.default)();
this.interceptRequests(health);
this.createGetTables();
this.createGetMetadata();
this.createHasMoreRows();
this.createGetRowCount();
this.createGetRows();
this.createGetDataRows();
}
ExtractorApi.prototype.interceptRequests = function (health) {
var _this = this;
this.app.use((0, api_utils_1.getRequestLogger)(this.constructor.name));
this.app.use(function (req, res, next) {
var callerIdHeader = req.headers[eps_http_header_1.EpsHttpHeader.CallerId];
if (callerIdHeader !== _this.callerId && callerIdHeader !== '0') {
return (0, api_utils_1.sendBadRequest)(res, 'Missing or invalid caller-id in header');
}
var epsInstanceIdHeader = req.headers[eps_http_header_1.EpsHttpHeader.EpsInstanceId];
if (epsInstanceIdHeader !== _this.epsInstanceId && epsInstanceIdHeader !== '0') {
return (0, api_utils_1.sendBadRequest)(res, 'Missing eps-instance-id in header');
}
var connectionIdHeader = req.headers[eps_http_header_1.EpsHttpHeader.ConnectionId];
if (connectionIdHeader !== _this.connectionId && connectionIdHeader !== '0') {
return (0, api_utils_1.sendBadRequest)(res, 'Missing or invalid connection-id in header');
}
var extractorIdHeader = req.headers[eps_http_header_1.EpsHttpHeader.ExtractorId];
if (extractorIdHeader !== _this.extractorId && extractorIdHeader !== '0') {
return (0, api_utils_1.sendBadRequest)(res, 'Missing or invalid extractor-id in header');
}
return next();
});
this.app.use(function (req, res, next) {
var errorMessage = health.errorMessage;
if (errorMessage !== undefined) {
(0, api_utils_1.sendBadRequest)(res, errorMessage);
return;
}
return next();
});
};
ExtractorApi.prototype.createGetTables = function () {
var _this = this;
this.app.get('/tables', function (_req, res) {
var tables = _this.tableManager.getTableNames();
res.send(tables);
});
};
/**
/tables/<name>/metadata?sort=original returns the original order of the columns from the source.
/tables/<name>/metadata sorts column by id to work with a monolith dependency on sorted columns.
*/
ExtractorApi.prototype.createGetMetadata = function () {
var _this = this;
this.app.get('/tables/:tableName/metadata', function (req, res) { return __awaiter(_this, void 0, void 0, function () {
var tableName, sort, table, originalColumns, columns, metadata, err_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 2, , 3]);
tableName = req.params.tableName;
sort = (0, extractor_api_utils_1.getOptionalStringQueryParam)(req, 'sort');
table = this.tableManager.getTable(tableName);
if (table === undefined) {
(0, api_utils_1.sendNotFound)(res, "Table ".concat(tableName, " is not found."));
return [2 /*return*/];
}
return [4 /*yield*/, table.getMetadata()];
case 1:
originalColumns = (_a.sent()).columns;
columns = __spreadArray([], __read(originalColumns), false);
if (sort !== 'original') {
sortColumnHeaderList(columns);
}
metadata = {
columns: columns,
};
res.send(metadata);
return [3 /*break*/, 3];
case 2:
err_1 = _a.sent();
(0, api_utils_1.sendBadRequest)(res, err_1);
return [3 /*break*/, 3];
case 3: return [2 /*return*/];
}
});
}); });
};
// /tables/name/rows?reset=true // default count: 100
// /tables/name/rows?count=500&reset=true
// /tables/name/rows?count=500
// /tables/name/rows/preview?count=10
ExtractorApi.prototype.createGetRows = function () {
var _this = this;
this.app.get('/tables/:tableName/rows/:preview?', function (req, res) { return __awaiter(_this, void 0, void 0, function () {
var _a, tableName, preview, sort, isPreview, reset, count, table, originalColumns, columns, datarows, rows, err_2;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
_b.trys.push([0, 3, , 4]);
_a = req.params, tableName = _a.tableName, preview = _a.preview;
sort = (0, extractor_api_utils_1.getOptionalStringQueryParam)(req, 'sort');
isPreview = (preview === null || preview === void 0 ? void 0 : preview.toLowerCase()) === 'preview';
reset = (0, extractor_api_utils_1.getResetParam)(req);
count = (0, extractor_api_utils_1.getCountParam)(req);
table = this.tableManager.getTable(tableName);
if (table === undefined) {
(0, api_utils_1.sendNotFound)(res, "Table ".concat(tableName, " is not found."));
return [2 /*return*/];
}
if (reset) {
table.resetOffset();
}
return [4 /*yield*/, table.getMetadata()];
case 1:
originalColumns = (_b.sent()).columns;
columns = __spreadArray([], __read(originalColumns), false);
if (sort !== 'original') {
sortColumnHeaderList(columns);
}
return [4 /*yield*/, (0, extractor_api_utils_1.getTableDataRows)(table, { count: count, preview: isPreview })];
case 2:
datarows = _b.sent();
rows = (0, extractor_api_utils_1.getRowsForResponse)(datarows, columns);
res.send(rows);
return [3 /*break*/, 4];
case 3:
err_2 = _b.sent();
(0, api_utils_1.sendBadRequest)(res, err_2);
return [3 /*break*/, 4];
case 4: return [2 /*return*/];
}
});
}); });
};
/**
* Endpoint: /tables/:tablename/datarows?offset=500&limit=2 // default offset: 0, limit: 100
* Successful response
{
“data”: [
[a1, b1, c1, ....],
[a2, b2, c2, ....],
...
],
“hasMoreRows”: false
“offset”: 0
“limit”: 1000
}
*/
ExtractorApi.prototype.createGetDataRows = function () {
var _this = this;
this.app.get('/tables/:tableName/datarows', function (req, res) { return __awaiter(_this, void 0, void 0, function () {
var tableName, offset, limit, sort, table, originalColumns, columns, _a, datarows, hasMoreRows, rows, err_3;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
_b.trys.push([0, 3, , 4]);
tableName = req.params.tableName;
offset = (0, extractor_api_utils_1.getOffsetParam)(req);
limit = (0, extractor_api_utils_1.getLimitParam)(req);
sort = (0, extractor_api_utils_1.getOptionalStringQueryParam)(req, 'sort');
table = this.tableManager.getTable(tableName);
if (table === undefined) {
(0, api_utils_1.sendNotFound)(res, "Table ".concat(tableName, " is not found."));
return [2 /*return*/];
}
return [4 /*yield*/, table.getMetadata()];
case 1:
originalColumns = (_b.sent()).columns;
columns = __spreadArray([], __read(originalColumns), false);
if (sort !== 'original') {
sortColumnHeaderList(columns);
}
return [4 /*yield*/, table.getDataRows(limit, offset)];
case 2:
_a = _b.sent(), datarows = _a.data, hasMoreRows = _a.hasMoreRows;
rows = (0, extractor_api_utils_1.getRowsForResponse)(datarows, columns);
res.send({
data: rows,
hasMoreRows: hasMoreRows,
offset: offset,
limit: limit,
});
return [3 /*break*/, 4];
case 3:
err_3 = _b.sent();
(0, api_utils_1.sendBadRequest)(res, err_3);
return [3 /*break*/, 4];
case 4: return [2 /*return*/];
}
});
}); });
};
ExtractorApi.prototype.createHasMoreRows = function () {
var _this = this;
this.app.get('/tables/:tableName/rows/status', function (req, res) { return __awaiter(_this, void 0, void 0, function () {
var tableName, table, hasMoreTuples, err_4;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 2, , 3]);
tableName = req.params.tableName;
table = this.tableManager.getTable(tableName);
if (table === undefined) {
(0, api_utils_1.sendNotFound)(res, "Table ".concat(tableName, " is not found."));
return [2 /*return*/];
}
return [4 /*yield*/, table.hasNextRow()];
case 1:
hasMoreTuples = _a.sent();
res.send({
hasMoreTuples: hasMoreTuples ? 1 : 0,
});
return [3 /*break*/, 3];
case 2:
err_4 = _a.sent();
(0, api_utils_1.sendBadRequest)(res, err_4);
return [3 /*break*/, 3];
case 3: return [2 /*return*/];
}
});
}); });
};
ExtractorApi.prototype.createGetRowCount = function () {
var _this = this;
this.app.get('/tables/:tableName/rows/count', function (req, res) { return __awaiter(_this, void 0, void 0, function () {
var tableName, table, rowCount, err_5;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 2, , 3]);
tableName = req.params.tableName;
table = this.tableManager.getTable(tableName);
if (table === undefined) {
(0, api_utils_1.sendNotFound)(res, "Table ".concat(tableName, " is not found."));
return [2 /*return*/];
}
return [4 /*yield*/, table.getRowCount()];
case 1:
rowCount = _a.sent();
res.send({ count: rowCount });
return [3 /*break*/, 3];
case 2:
err_5 = _a.sent();
(0, api_utils_1.sendBadRequest)(res, err_5);
return [3 /*break*/, 3];
case 3: return [2 /*return*/];
}
});
}); });
};
/** Starts extractor HTTP server */
ExtractorApi.prototype.start = function (port) {
return __awaiter(this, void 0, void 0, function () {
var server, error_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 2, , 3]);
server = node_http_1.default.createServer(this.app);
return [4 /*yield*/, (0, server_utils_1.startHttpServer)(server, port)];
case 1:
_a.sent();
eps_logger_1.Logger.info("Running Extractor on port ".concat(port, " under process ").concat(process.pid));
return [3 /*break*/, 3];
case 2:
error_1 = _a.sent();
error_1.message = "Failed to start extractor API on port ".concat(port, ". ").concat(error_1.message);
throw error_1;
case 3: return [2 /*return*/];
}
});
});
};
return ExtractorApi;
}());
exports.default = ExtractorApi;
/**
* Sort the given column header array into unicode order. The sorted result is
* the columns order that extractor API responses (when 'original' param is not present).
* Tableau monolith expects EPS to send the column header in a particular order.
* Based on the observation, sorting by unicode order works properly.
*
* Note the function mutates the original input array.
*/
function sortColumnHeaderList(columns) {
columns.sort(function (a, b) {
var idA = a.id;
var idB = b.id;
// For JS string comparison operators, refer to https://javascript.info/comparison#string-comparison
if (idA < idB) {
return -1;
}
if (idA > idB) {
return 1;
}
return 0;
});
}
exports.sortColumnHeaderList = sortColumnHeaderList;
//# 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