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svrjs-blog-newsletter/backend/node_modules/mongodb/lib/utils.js

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2024-05-26 22:54:55 +02:00
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.compareObjectId = exports.getMongoDBClientEncryption = exports.commandSupportsReadConcern = exports.shuffle = exports.parsePackageVersion = exports.supportsRetryableWrites = exports.enumToString = exports.emitWarningOnce = exports.emitWarning = exports.MONGODB_WARNING_CODE = exports.DEFAULT_PK_FACTORY = exports.HostAddress = exports.BufferPool = exports.List = exports.deepCopy = exports.isRecord = exports.setDifference = exports.isHello = exports.isSuperset = exports.resolveOptions = exports.hasAtomicOperators = exports.calculateDurationInMs = exports.now = exports.makeStateMachine = exports.errorStrictEqual = exports.arrayStrictEqual = exports.eachAsyncSeries = exports.eachAsync = exports.maxWireVersion = exports.uuidV4 = exports.databaseNamespace = exports.maybeCallback = exports.makeCounter = exports.MongoDBNamespace = exports.ns = exports.deprecateOptions = exports.defaultMsgHandler = exports.getTopology = exports.decorateWithExplain = exports.decorateWithReadConcern = exports.decorateWithCollation = exports.isPromiseLike = exports.applyWriteConcern = exports.applyRetryableWrites = exports.filterOptions = exports.mergeOptions = exports.isObject = exports.normalizeHintField = exports.checkCollectionName = exports.MAX_JS_INT = void 0;
exports.matchesParentDomain = exports.parseUnsignedInteger = exports.parseInteger = void 0;
const crypto = require("crypto");
const url_1 = require("url");
const bson_1 = require("./bson");
const constants_1 = require("./cmap/wire_protocol/constants");
const constants_2 = require("./constants");
const error_1 = require("./error");
const promise_provider_1 = require("./promise_provider");
const read_concern_1 = require("./read_concern");
const read_preference_1 = require("./read_preference");
const common_1 = require("./sdam/common");
const write_concern_1 = require("./write_concern");
exports.MAX_JS_INT = Number.MAX_SAFE_INTEGER + 1;
/**
* Throws if collectionName is not a valid mongodb collection namespace.
* @internal
*/
function checkCollectionName(collectionName) {
if ('string' !== typeof collectionName) {
throw new error_1.MongoInvalidArgumentError('Collection name must be a String');
}
if (!collectionName || collectionName.indexOf('..') !== -1) {
throw new error_1.MongoInvalidArgumentError('Collection names cannot be empty');
}
if (collectionName.indexOf('$') !== -1 &&
collectionName.match(/((^\$cmd)|(oplog\.\$main))/) == null) {
// TODO(NODE-3483): Use MongoNamespace static method
throw new error_1.MongoInvalidArgumentError("Collection names must not contain '$'");
}
if (collectionName.match(/^\.|\.$/) != null) {
// TODO(NODE-3483): Use MongoNamespace static method
throw new error_1.MongoInvalidArgumentError("Collection names must not start or end with '.'");
}
// Validate that we are not passing 0x00 in the collection name
if (collectionName.indexOf('\x00') !== -1) {
// TODO(NODE-3483): Use MongoNamespace static method
throw new error_1.MongoInvalidArgumentError('Collection names cannot contain a null character');
}
}
exports.checkCollectionName = checkCollectionName;
/**
* Ensure Hint field is in a shape we expect:
* - object of index names mapping to 1 or -1
* - just an index name
* @internal
*/
function normalizeHintField(hint) {
let finalHint = undefined;
if (typeof hint === 'string') {
finalHint = hint;
}
else if (Array.isArray(hint)) {
finalHint = {};
hint.forEach(param => {
finalHint[param] = 1;
});
}
else if (hint != null && typeof hint === 'object') {
finalHint = {};
for (const name in hint) {
finalHint[name] = hint[name];
}
}
return finalHint;
}
exports.normalizeHintField = normalizeHintField;
const TO_STRING = (object) => Object.prototype.toString.call(object);
/**
* Checks if arg is an Object:
* - **NOTE**: the check is based on the `[Symbol.toStringTag]() === 'Object'`
* @internal
*/
function isObject(arg) {
return '[object Object]' === TO_STRING(arg);
}
exports.isObject = isObject;
/** @internal */
function mergeOptions(target, source) {
return { ...target, ...source };
}
exports.mergeOptions = mergeOptions;
/** @internal */
function filterOptions(options, names) {
const filterOptions = {};
for (const name in options) {
if (names.includes(name)) {
filterOptions[name] = options[name];
}
}
// Filtered options
return filterOptions;
}
exports.filterOptions = filterOptions;
/**
* Applies retryWrites: true to a command if retryWrites is set on the command's database.
* @internal
*
* @param target - The target command to which we will apply retryWrites.
* @param db - The database from which we can inherit a retryWrites value.
*/
function applyRetryableWrites(target, db) {
var _a;
if (db && ((_a = db.s.options) === null || _a === void 0 ? void 0 : _a.retryWrites)) {
target.retryWrites = true;
}
return target;
}
exports.applyRetryableWrites = applyRetryableWrites;
/**
* Applies a write concern to a command based on well defined inheritance rules, optionally
* detecting support for the write concern in the first place.
* @internal
*
* @param target - the target command we will be applying the write concern to
* @param sources - sources where we can inherit default write concerns from
* @param options - optional settings passed into a command for write concern overrides
*/
function applyWriteConcern(target, sources, options) {
options = options !== null && options !== void 0 ? options : {};
const db = sources.db;
const coll = sources.collection;
if (options.session && options.session.inTransaction()) {
// writeConcern is not allowed within a multi-statement transaction
if (target.writeConcern) {
delete target.writeConcern;
}
return target;
}
const writeConcern = write_concern_1.WriteConcern.fromOptions(options);
if (writeConcern) {
return Object.assign(target, { writeConcern });
}
if (coll && coll.writeConcern) {
return Object.assign(target, { writeConcern: Object.assign({}, coll.writeConcern) });
}
if (db && db.writeConcern) {
return Object.assign(target, { writeConcern: Object.assign({}, db.writeConcern) });
}
return target;
}
exports.applyWriteConcern = applyWriteConcern;
/**
* Checks if a given value is a Promise
*
* @typeParam T - The resolution type of the possible promise
* @param value - An object that could be a promise
* @returns true if the provided value is a Promise
*/
function isPromiseLike(value) {
return !!value && typeof value.then === 'function';
}
exports.isPromiseLike = isPromiseLike;
/**
* Applies collation to a given command.
* @internal
*
* @param command - the command on which to apply collation
* @param target - target of command
* @param options - options containing collation settings
*/
function decorateWithCollation(command, target, options) {
const capabilities = getTopology(target).capabilities;
if (options.collation && typeof options.collation === 'object') {
if (capabilities && capabilities.commandsTakeCollation) {
command.collation = options.collation;
}
else {
throw new error_1.MongoCompatibilityError(`Current topology does not support collation`);
}
}
}
exports.decorateWithCollation = decorateWithCollation;
/**
* Applies a read concern to a given command.
* @internal
*
* @param command - the command on which to apply the read concern
* @param coll - the parent collection of the operation calling this method
*/
function decorateWithReadConcern(command, coll, options) {
if (options && options.session && options.session.inTransaction()) {
return;
}
const readConcern = Object.assign({}, command.readConcern || {});
if (coll.s.readConcern) {
Object.assign(readConcern, coll.s.readConcern);
}
if (Object.keys(readConcern).length > 0) {
Object.assign(command, { readConcern: readConcern });
}
}
exports.decorateWithReadConcern = decorateWithReadConcern;
/**
* Applies an explain to a given command.
* @internal
*
* @param command - the command on which to apply the explain
* @param options - the options containing the explain verbosity
*/
function decorateWithExplain(command, explain) {
if (command.explain) {
return command;
}
return { explain: command, verbosity: explain.verbosity };
}
exports.decorateWithExplain = decorateWithExplain;
/**
* A helper function to get the topology from a given provider. Throws
* if the topology cannot be found.
* @throws MongoNotConnectedError
* @internal
*/
function getTopology(provider) {
// MongoClient or ClientSession or AbstractCursor
if ('topology' in provider && provider.topology) {
return provider.topology;
}
else if ('s' in provider && 'client' in provider.s && provider.s.client.topology) {
return provider.s.client.topology;
}
else if ('s' in provider && 'db' in provider.s && provider.s.db.s.client.topology) {
return provider.s.db.s.client.topology;
}
throw new error_1.MongoNotConnectedError('MongoClient must be connected to perform this operation');
}
exports.getTopology = getTopology;
/**
* Default message handler for generating deprecation warnings.
* @internal
*
* @param name - function name
* @param option - option name
* @returns warning message
*/
function defaultMsgHandler(name, option) {
return `${name} option [${option}] is deprecated and will be removed in a later version.`;
}
exports.defaultMsgHandler = defaultMsgHandler;
/**
* Deprecates a given function's options.
* @internal
*
* @param this - the bound class if this is a method
* @param config - configuration for deprecation
* @param fn - the target function of deprecation
* @returns modified function that warns once per deprecated option, and executes original function
*/
function deprecateOptions(config, fn) {
if (process.noDeprecation === true) {
return fn;
}
const msgHandler = config.msgHandler ? config.msgHandler : defaultMsgHandler;
const optionsWarned = new Set();
function deprecated(...args) {
const options = args[config.optionsIndex];
// ensure options is a valid, non-empty object, otherwise short-circuit
if (!isObject(options) || Object.keys(options).length === 0) {
return fn.bind(this)(...args); // call the function, no change
}
// interrupt the function call with a warning
for (const deprecatedOption of config.deprecatedOptions) {
if (deprecatedOption in options && !optionsWarned.has(deprecatedOption)) {
optionsWarned.add(deprecatedOption);
const msg = msgHandler(config.name, deprecatedOption);
emitWarning(msg);
if (this && 'getLogger' in this) {
const logger = this.getLogger();
if (logger) {
logger.warn(msg);
}
}
}
}
return fn.bind(this)(...args);
}
// These lines copied from https://github.com/nodejs/node/blob/25e5ae41688676a5fd29b2e2e7602168eee4ceb5/lib/internal/util.js#L73-L80
// The wrapper will keep the same prototype as fn to maintain prototype chain
Object.setPrototypeOf(deprecated, fn);
if (fn.prototype) {
// Setting this (rather than using Object.setPrototype, as above) ensures
// that calling the unwrapped constructor gives an instanceof the wrapped
// constructor.
deprecated.prototype = fn.prototype;
}
return deprecated;
}
exports.deprecateOptions = deprecateOptions;
/** @internal */
function ns(ns) {
return MongoDBNamespace.fromString(ns);
}
exports.ns = ns;
/** @public */
class MongoDBNamespace {
/**
* Create a namespace object
*
* @param db - database name
* @param collection - collection name
*/
constructor(db, collection) {
this.db = db;
this.collection = collection === '' ? undefined : collection;
}
toString() {
return this.collection ? `${this.db}.${this.collection}` : this.db;
}
withCollection(collection) {
return new MongoDBNamespace(this.db, collection);
}
static fromString(namespace) {
if (typeof namespace !== 'string' || namespace === '') {
// TODO(NODE-3483): Replace with MongoNamespaceError
throw new error_1.MongoRuntimeError(`Cannot parse namespace from "${namespace}"`);
}
const [db, ...collectionParts] = namespace.split('.');
const collection = collectionParts.join('.');
return new MongoDBNamespace(db, collection === '' ? undefined : collection);
}
}
exports.MongoDBNamespace = MongoDBNamespace;
/** @internal */
function* makeCounter(seed = 0) {
let count = seed;
while (true) {
const newCount = count;
count += 1;
yield newCount;
}
}
exports.makeCounter = makeCounter;
function maybeCallback(promiseFn, callback) {
const PromiseConstructor = promise_provider_1.PromiseProvider.get();
const promise = promiseFn();
if (callback == null) {
if (PromiseConstructor == null) {
return promise;
}
else {
return new PromiseConstructor((resolve, reject) => {
promise.then(resolve, reject);
});
}
}
promise.then(result => callback(undefined, result), error => callback(error));
return;
}
exports.maybeCallback = maybeCallback;
/** @internal */
function databaseNamespace(ns) {
return ns.split('.')[0];
}
exports.databaseNamespace = databaseNamespace;
/**
* Synchronously Generate a UUIDv4
* @internal
*/
function uuidV4() {
const result = crypto.randomBytes(16);
result[6] = (result[6] & 0x0f) | 0x40;
result[8] = (result[8] & 0x3f) | 0x80;
return result;
}
exports.uuidV4 = uuidV4;
/**
* A helper function for determining `maxWireVersion` between legacy and new topology instances
* @internal
*/
function maxWireVersion(topologyOrServer) {
if (topologyOrServer) {
if (topologyOrServer.loadBalanced) {
// Since we do not have a monitor, we assume the load balanced server is always
// pointed at the latest mongodb version. There is a risk that for on-prem
// deployments that don't upgrade immediately that this could alert to the
// application that a feature is available that is actually not.
return constants_1.MAX_SUPPORTED_WIRE_VERSION;
}
if (topologyOrServer.hello) {
return topologyOrServer.hello.maxWireVersion;
}
if ('lastHello' in topologyOrServer && typeof topologyOrServer.lastHello === 'function') {
const lastHello = topologyOrServer.lastHello();
if (lastHello) {
return lastHello.maxWireVersion;
}
}
if (topologyOrServer.description &&
'maxWireVersion' in topologyOrServer.description &&
topologyOrServer.description.maxWireVersion != null) {
return topologyOrServer.description.maxWireVersion;
}
}
return 0;
}
exports.maxWireVersion = maxWireVersion;
/**
* Applies the function `eachFn` to each item in `arr`, in parallel.
* @internal
*
* @param arr - An array of items to asynchronously iterate over
* @param eachFn - A function to call on each item of the array. The callback signature is `(item, callback)`, where the callback indicates iteration is complete.
* @param callback - The callback called after every item has been iterated
*/
function eachAsync(arr, eachFn, callback) {
arr = arr || [];
let idx = 0;
let awaiting = 0;
for (idx = 0; idx < arr.length; ++idx) {
awaiting++;
eachFn(arr[idx], eachCallback);
}
if (awaiting === 0) {
callback();
return;
}
function eachCallback(err) {
awaiting--;
if (err) {
callback(err);
return;
}
if (idx === arr.length && awaiting <= 0) {
callback();
}
}
}
exports.eachAsync = eachAsync;
/** @internal */
function eachAsyncSeries(arr, eachFn, callback) {
arr = arr || [];
let idx = 0;
let awaiting = arr.length;
if (awaiting === 0) {
callback();
return;
}
function eachCallback(err) {
idx++;
awaiting--;
if (err) {
callback(err);
return;
}
if (idx === arr.length && awaiting <= 0) {
callback();
return;
}
eachFn(arr[idx], eachCallback);
}
eachFn(arr[idx], eachCallback);
}
exports.eachAsyncSeries = eachAsyncSeries;
/** @internal */
function arrayStrictEqual(arr, arr2) {
if (!Array.isArray(arr) || !Array.isArray(arr2)) {
return false;
}
return arr.length === arr2.length && arr.every((elt, idx) => elt === arr2[idx]);
}
exports.arrayStrictEqual = arrayStrictEqual;
/** @internal */
function errorStrictEqual(lhs, rhs) {
if (lhs === rhs) {
return true;
}
if (!lhs || !rhs) {
return lhs === rhs;
}
if ((lhs == null && rhs != null) || (lhs != null && rhs == null)) {
return false;
}
if (lhs.constructor.name !== rhs.constructor.name) {
return false;
}
if (lhs.message !== rhs.message) {
return false;
}
return true;
}
exports.errorStrictEqual = errorStrictEqual;
/** @internal */
function makeStateMachine(stateTable) {
return function stateTransition(target, newState) {
const legalStates = stateTable[target.s.state];
if (legalStates && legalStates.indexOf(newState) < 0) {
throw new error_1.MongoRuntimeError(`illegal state transition from [${target.s.state}] => [${newState}], allowed: [${legalStates}]`);
}
target.emit('stateChanged', target.s.state, newState);
target.s.state = newState;
};
}
exports.makeStateMachine = makeStateMachine;
/** @internal */
function now() {
const hrtime = process.hrtime();
return Math.floor(hrtime[0] * 1000 + hrtime[1] / 1000000);
}
exports.now = now;
/** @internal */
function calculateDurationInMs(started) {
if (typeof started !== 'number') {
throw new error_1.MongoInvalidArgumentError('Numeric value required to calculate duration');
}
const elapsed = now() - started;
return elapsed < 0 ? 0 : elapsed;
}
exports.calculateDurationInMs = calculateDurationInMs;
/** @internal */
function hasAtomicOperators(doc) {
if (Array.isArray(doc)) {
for (const document of doc) {
if (hasAtomicOperators(document)) {
return true;
}
}
return false;
}
const keys = Object.keys(doc);
return keys.length > 0 && keys[0][0] === '$';
}
exports.hasAtomicOperators = hasAtomicOperators;
/**
* Merge inherited properties from parent into options, prioritizing values from options,
* then values from parent.
* @internal
*/
function resolveOptions(parent, options) {
var _a, _b, _c;
const result = Object.assign({}, options, (0, bson_1.resolveBSONOptions)(options, parent));
// Users cannot pass a readConcern/writeConcern to operations in a transaction
const session = options === null || options === void 0 ? void 0 : options.session;
if (!(session === null || session === void 0 ? void 0 : session.inTransaction())) {
const readConcern = (_a = read_concern_1.ReadConcern.fromOptions(options)) !== null && _a !== void 0 ? _a : parent === null || parent === void 0 ? void 0 : parent.readConcern;
if (readConcern) {
result.readConcern = readConcern;
}
const writeConcern = (_b = write_concern_1.WriteConcern.fromOptions(options)) !== null && _b !== void 0 ? _b : parent === null || parent === void 0 ? void 0 : parent.writeConcern;
if (writeConcern) {
result.writeConcern = writeConcern;
}
}
const readPreference = (_c = read_preference_1.ReadPreference.fromOptions(options)) !== null && _c !== void 0 ? _c : parent === null || parent === void 0 ? void 0 : parent.readPreference;
if (readPreference) {
result.readPreference = readPreference;
}
return result;
}
exports.resolveOptions = resolveOptions;
function isSuperset(set, subset) {
set = Array.isArray(set) ? new Set(set) : set;
subset = Array.isArray(subset) ? new Set(subset) : subset;
for (const elem of subset) {
if (!set.has(elem)) {
return false;
}
}
return true;
}
exports.isSuperset = isSuperset;
/**
* Checks if the document is a Hello request
* @internal
*/
function isHello(doc) {
return doc[constants_2.LEGACY_HELLO_COMMAND] || doc.hello ? true : false;
}
exports.isHello = isHello;
/** Returns the items that are uniquely in setA */
function setDifference(setA, setB) {
const difference = new Set(setA);
for (const elem of setB) {
difference.delete(elem);
}
return difference;
}
exports.setDifference = setDifference;
const HAS_OWN = (object, prop) => Object.prototype.hasOwnProperty.call(object, prop);
function isRecord(value, requiredKeys = undefined) {
if (!isObject(value)) {
return false;
}
const ctor = value.constructor;
if (ctor && ctor.prototype) {
if (!isObject(ctor.prototype)) {
return false;
}
// Check to see if some method exists from the Object exists
if (!HAS_OWN(ctor.prototype, 'isPrototypeOf')) {
return false;
}
}
if (requiredKeys) {
const keys = Object.keys(value);
return isSuperset(keys, requiredKeys);
}
return true;
}
exports.isRecord = isRecord;
/**
* Make a deep copy of an object
*
* NOTE: This is not meant to be the perfect implementation of a deep copy,
* but instead something that is good enough for the purposes of
* command monitoring.
*/
function deepCopy(value) {
if (value == null) {
return value;
}
else if (Array.isArray(value)) {
return value.map(item => deepCopy(item));
}
else if (isRecord(value)) {
const res = {};
for (const key in value) {
res[key] = deepCopy(value[key]);
}
return res;
}
const ctor = value.constructor;
if (ctor) {
switch (ctor.name.toLowerCase()) {
case 'date':
return new ctor(Number(value));
case 'map':
return new Map(value);
case 'set':
return new Set(value);
case 'buffer':
return Buffer.from(value);
}
}
return value;
}
exports.deepCopy = deepCopy;
/**
* A sequential list of items in a circularly linked list
* @remarks
* The head node is special, it is always defined and has a value of null.
* It is never "included" in the list, in that, it is not returned by pop/shift or yielded by the iterator.
* The circular linkage and always defined head node are to reduce checks for null next/prev references to zero.
* New nodes are declared as object literals with keys always in the same order: next, prev, value.
* @internal
*/
class List {
get length() {
return this.count;
}
get [Symbol.toStringTag]() {
return 'List';
}
constructor() {
this.count = 0;
// this is carefully crafted:
// declaring a complete and consistently key ordered
// object is beneficial to the runtime optimizations
this.head = {
next: null,
prev: null,
value: null
};
this.head.next = this.head;
this.head.prev = this.head;
}
toArray() {
return Array.from(this);
}
toString() {
return `head <=> ${this.toArray().join(' <=> ')} <=> head`;
}
*[Symbol.iterator]() {
for (const node of this.nodes()) {
yield node.value;
}
}
*nodes() {
let ptr = this.head.next;
while (ptr !== this.head) {
// Save next before yielding so that we make removing within iteration safe
const { next } = ptr;
yield ptr;
ptr = next;
}
}
/** Insert at end of list */
push(value) {
this.count += 1;
const newNode = {
next: this.head,
prev: this.head.prev,
value
};
this.head.prev.next = newNode;
this.head.prev = newNode;
}
/** Inserts every item inside an iterable instead of the iterable itself */
pushMany(iterable) {
for (const value of iterable) {
this.push(value);
}
}
/** Insert at front of list */
unshift(value) {
this.count += 1;
const newNode = {
next: this.head.next,
prev: this.head,
value
};
this.head.next.prev = newNode;
this.head.next = newNode;
}
remove(node) {
if (node === this.head || this.length === 0) {
return null;
}
this.count -= 1;
const prevNode = node.prev;
const nextNode = node.next;
prevNode.next = nextNode;
nextNode.prev = prevNode;
return node.value;
}
/** Removes the first node at the front of the list */
shift() {
return this.remove(this.head.next);
}
/** Removes the last node at the end of the list */
pop() {
return this.remove(this.head.prev);
}
/** Iterates through the list and removes nodes where filter returns true */
prune(filter) {
for (const node of this.nodes()) {
if (filter(node.value)) {
this.remove(node);
}
}
}
clear() {
this.count = 0;
this.head.next = this.head;
this.head.prev = this.head;
}
/** Returns the first item in the list, does not remove */
first() {
// If the list is empty, value will be the head's null
return this.head.next.value;
}
/** Returns the last item in the list, does not remove */
last() {
// If the list is empty, value will be the head's null
return this.head.prev.value;
}
}
exports.List = List;
/**
* A pool of Buffers which allow you to read them as if they were one
* @internal
*/
class BufferPool {
constructor() {
this.buffers = new List();
this.totalByteLength = 0;
}
get length() {
return this.totalByteLength;
}
/** Adds a buffer to the internal buffer pool list */
append(buffer) {
this.buffers.push(buffer);
this.totalByteLength += buffer.length;
}
/**
* If BufferPool contains 4 bytes or more construct an int32 from the leading bytes,
* otherwise return null. Size can be negative, caller should error check.
*/
getInt32() {
if (this.totalByteLength < 4) {
return null;
}
const firstBuffer = this.buffers.first();
if (firstBuffer != null && firstBuffer.byteLength >= 4) {
return firstBuffer.readInt32LE(0);
}
// Unlikely case: an int32 is split across buffers.
// Use read and put the returned buffer back on top
const top4Bytes = this.read(4);
const value = top4Bytes.readInt32LE(0);
// Put it back.
this.totalByteLength += 4;
this.buffers.unshift(top4Bytes);
return value;
}
/** Reads the requested number of bytes, optionally consuming them */
read(size) {
if (typeof size !== 'number' || size < 0) {
throw new error_1.MongoInvalidArgumentError('Argument "size" must be a non-negative number');
}
// oversized request returns empty buffer
if (size > this.totalByteLength) {
return Buffer.alloc(0);
}
// We know we have enough, we just don't know how it is spread across chunks
// TODO(NODE-4732): alloc API should change based on raw option
const result = Buffer.allocUnsafe(size);
for (let bytesRead = 0; bytesRead < size;) {
const buffer = this.buffers.shift();
if (buffer == null) {
break;
}
const bytesRemaining = size - bytesRead;
const bytesReadable = Math.min(bytesRemaining, buffer.byteLength);
const bytes = buffer.subarray(0, bytesReadable);
result.set(bytes, bytesRead);
bytesRead += bytesReadable;
this.totalByteLength -= bytesReadable;
if (bytesReadable < buffer.byteLength) {
this.buffers.unshift(buffer.subarray(bytesReadable));
}
}
return result;
}
}
exports.BufferPool = BufferPool;
/** @public */
class HostAddress {
constructor(hostString) {
this.host = undefined;
this.port = undefined;
this.socketPath = undefined;
this.isIPv6 = false;
const escapedHost = hostString.split(' ').join('%20'); // escape spaces, for socket path hosts
if (escapedHost.endsWith('.sock')) {
// heuristically determine if we're working with a domain socket
this.socketPath = decodeURIComponent(escapedHost);
return;
}
const urlString = `iLoveJS://${escapedHost}`;
let url;
try {
url = new url_1.URL(urlString);
}
catch (urlError) {
const runtimeError = new error_1.MongoRuntimeError(`Unable to parse ${escapedHost} with URL`);
runtimeError.cause = urlError;
throw runtimeError;
}
const hostname = url.hostname;
const port = url.port;
let normalized = decodeURIComponent(hostname).toLowerCase();
if (normalized.startsWith('[') && normalized.endsWith(']')) {
this.isIPv6 = true;
normalized = normalized.substring(1, hostname.length - 1);
}
this.host = normalized.toLowerCase();
if (typeof port === 'number') {
this.port = port;
}
else if (typeof port === 'string' && port !== '') {
this.port = Number.parseInt(port, 10);
}
else {
this.port = 27017;
}
if (this.port === 0) {
throw new error_1.MongoParseError('Invalid port (zero) with hostname');
}
Object.freeze(this);
}
[Symbol.for('nodejs.util.inspect.custom')]() {
return this.inspect();
}
inspect() {
return `new HostAddress('${this.toString()}')`;
}
toString() {
if (typeof this.host === 'string') {
if (this.isIPv6) {
return `[${this.host}]:${this.port}`;
}
return `${this.host}:${this.port}`;
}
return `${this.socketPath}`;
}
static fromString(s) {
return new HostAddress(s);
}
static fromHostPort(host, port) {
if (host.includes(':')) {
host = `[${host}]`; // IPv6 address
}
return HostAddress.fromString(`${host}:${port}`);
}
static fromSrvRecord({ name, port }) {
return HostAddress.fromHostPort(name, port);
}
}
exports.HostAddress = HostAddress;
exports.DEFAULT_PK_FACTORY = {
// We prefer not to rely on ObjectId having a createPk method
createPk() {
return new bson_1.ObjectId();
}
};
/**
* When the driver used emitWarning the code will be equal to this.
* @public
*
* @example
* ```ts
* process.on('warning', (warning) => {
* if (warning.code === MONGODB_WARNING_CODE) console.error('Ah an important warning! :)')
* })
* ```
*/
exports.MONGODB_WARNING_CODE = 'MONGODB DRIVER';
/** @internal */
function emitWarning(message) {
return process.emitWarning(message, { code: exports.MONGODB_WARNING_CODE });
}
exports.emitWarning = emitWarning;
const emittedWarnings = new Set();
/**
* Will emit a warning once for the duration of the application.
* Uses the message to identify if it has already been emitted
* so using string interpolation can cause multiple emits
* @internal
*/
function emitWarningOnce(message) {
if (!emittedWarnings.has(message)) {
emittedWarnings.add(message);
return emitWarning(message);
}
}
exports.emitWarningOnce = emitWarningOnce;
/**
* Takes a JS object and joins the values into a string separated by ', '
*/
function enumToString(en) {
return Object.values(en).join(', ');
}
exports.enumToString = enumToString;
/**
* Determine if a server supports retryable writes.
*
* @internal
*/
function supportsRetryableWrites(server) {
if (!server) {
return false;
}
if (server.loadBalanced) {
// Loadbalanced topologies will always support retry writes
return true;
}
if (server.description.logicalSessionTimeoutMinutes != null) {
// that supports sessions
if (server.description.type !== common_1.ServerType.Standalone) {
// and that is not a standalone
return true;
}
}
return false;
}
exports.supportsRetryableWrites = supportsRetryableWrites;
function parsePackageVersion({ version }) {
const [major, minor, patch] = version.split('.').map((n) => Number.parseInt(n, 10));
return { major, minor, patch };
}
exports.parsePackageVersion = parsePackageVersion;
/**
* Fisher–Yates Shuffle
*
* Reference: https://bost.ocks.org/mike/shuffle/
* @param sequence - items to be shuffled
* @param limit - Defaults to `0`. If nonzero shuffle will slice the randomized array e.g, `.slice(0, limit)` otherwise will return the entire randomized array.
*/
function shuffle(sequence, limit = 0) {
const items = Array.from(sequence); // shallow copy in order to never shuffle the input
if (limit > items.length) {
throw new error_1.MongoRuntimeError('Limit must be less than the number of items');
}
let remainingItemsToShuffle = items.length;
const lowerBound = limit % items.length === 0 ? 1 : items.length - limit;
while (remainingItemsToShuffle > lowerBound) {
// Pick a remaining element
const randomIndex = Math.floor(Math.random() * remainingItemsToShuffle);
remainingItemsToShuffle -= 1;
// And swap it with the current element
const swapHold = items[remainingItemsToShuffle];
items[remainingItemsToShuffle] = items[randomIndex];
items[randomIndex] = swapHold;
}
return limit % items.length === 0 ? items : items.slice(lowerBound);
}
exports.shuffle = shuffle;
// TODO: this should be codified in command construction
// @see https://github.com/mongodb/specifications/blob/master/source/read-write-concern/read-write-concern.rst#read-concern
function commandSupportsReadConcern(command, options) {
if (command.aggregate || command.count || command.distinct || command.find || command.geoNear) {
return true;
}
if (command.mapReduce &&
options &&
options.out &&
(options.out.inline === 1 || options.out === 'inline')) {
return true;
}
return false;
}
exports.commandSupportsReadConcern = commandSupportsReadConcern;
/** A utility function to get the instance of mongodb-client-encryption, if it exists. */
function getMongoDBClientEncryption() {
let mongodbClientEncryption = null;
// NOTE(NODE-4254): This is to get around the circular dependency between
// mongodb-client-encryption and the driver in the test scenarios.
if (typeof process.env.MONGODB_CLIENT_ENCRYPTION_OVERRIDE === 'string' &&
process.env.MONGODB_CLIENT_ENCRYPTION_OVERRIDE.length > 0) {
try {
// NOTE(NODE-3199): Ensure you always wrap an optional require literally in the try block
// Cannot be moved to helper utility function, bundlers search and replace the actual require call
// in a way that makes this line throw at bundle time, not runtime, catching here will make bundling succeed
mongodbClientEncryption = require(process.env.MONGODB_CLIENT_ENCRYPTION_OVERRIDE);
}
catch {
// ignore
}
}
else {
try {
// NOTE(NODE-3199): Ensure you always wrap an optional require literally in the try block
// Cannot be moved to helper utility function, bundlers search and replace the actual require call
// in a way that makes this line throw at bundle time, not runtime, catching here will make bundling succeed
mongodbClientEncryption = require('mongodb-client-encryption');
}
catch {
// ignore
}
}
return mongodbClientEncryption;
}
exports.getMongoDBClientEncryption = getMongoDBClientEncryption;
/**
* Compare objectIds. `null` is always less
* - `+1 = oid1 is greater than oid2`
* - `-1 = oid1 is less than oid2`
* - `+0 = oid1 is equal oid2`
*/
function compareObjectId(oid1, oid2) {
if (oid1 == null && oid2 == null) {
return 0;
}
if (oid1 == null) {
return -1;
}
if (oid2 == null) {
return 1;
}
return oid1.id.compare(oid2.id);
}
exports.compareObjectId = compareObjectId;
function parseInteger(value) {
if (typeof value === 'number')
return Math.trunc(value);
const parsedValue = Number.parseInt(String(value), 10);
return Number.isNaN(parsedValue) ? null : parsedValue;
}
exports.parseInteger = parseInteger;
function parseUnsignedInteger(value) {
const parsedInt = parseInteger(value);
return parsedInt != null && parsedInt >= 0 ? parsedInt : null;
}
exports.parseUnsignedInteger = parseUnsignedInteger;
/**
* Determines whether a provided address matches the provided parent domain.
*
* If a DNS server were to become compromised SRV records would still need to
* advertise addresses that are under the same domain as the srvHost.
*
* @param address - The address to check against a domain
* @param srvHost - The domain to check the provided address against
* @returns Whether the provided address matches the parent domain
*/
function matchesParentDomain(address, srvHost) {
// Remove trailing dot if exists on either the resolved address or the srv hostname
const normalizedAddress = address.endsWith('.') ? address.slice(0, address.length - 1) : address;
const normalizedSrvHost = srvHost.endsWith('.') ? srvHost.slice(0, srvHost.length - 1) : srvHost;
const allCharacterBeforeFirstDot = /^.*?\./;
// Remove all characters before first dot
// Add leading dot back to string so
// an srvHostDomain = '.trusted.site'
// will not satisfy an addressDomain that endsWith '.fake-trusted.site'
const addressDomain = `.${normalizedAddress.replace(allCharacterBeforeFirstDot, '')}`;
const srvHostDomain = `.${normalizedSrvHost.replace(allCharacterBeforeFirstDot, '')}`;
return addressDomain.endsWith(srvHostDomain);
}
exports.matchesParentDomain = matchesParentDomain;
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