239 lines
9.1 KiB
JavaScript
239 lines
9.1 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.Binary = void 0;
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var buffer_1 = require("buffer");
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var ensure_buffer_1 = require("./ensure_buffer");
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var uuid_utils_1 = require("./uuid_utils");
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var uuid_1 = require("./uuid");
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var error_1 = require("./error");
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/**
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* A class representation of the BSON Binary type.
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* @public
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*/
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var Binary = /** @class */ (function () {
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/**
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* @param buffer - a buffer object containing the binary data.
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* @param subType - the option binary type.
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*/
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function Binary(buffer, subType) {
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if (!(this instanceof Binary))
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return new Binary(buffer, subType);
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if (!(buffer == null) &&
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!(typeof buffer === 'string') &&
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!ArrayBuffer.isView(buffer) &&
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!(buffer instanceof ArrayBuffer) &&
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!Array.isArray(buffer)) {
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throw new error_1.BSONTypeError('Binary can only be constructed from string, Buffer, TypedArray, or Array<number>');
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}
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this.sub_type = subType !== null && subType !== void 0 ? subType : Binary.BSON_BINARY_SUBTYPE_DEFAULT;
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if (buffer == null) {
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// create an empty binary buffer
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this.buffer = buffer_1.Buffer.alloc(Binary.BUFFER_SIZE);
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this.position = 0;
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}
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else {
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if (typeof buffer === 'string') {
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// string
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this.buffer = buffer_1.Buffer.from(buffer, 'binary');
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}
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else if (Array.isArray(buffer)) {
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// number[]
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this.buffer = buffer_1.Buffer.from(buffer);
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}
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else {
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// Buffer | TypedArray | ArrayBuffer
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this.buffer = ensure_buffer_1.ensureBuffer(buffer);
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}
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this.position = this.buffer.byteLength;
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}
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}
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/**
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* Updates this binary with byte_value.
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*
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* @param byteValue - a single byte we wish to write.
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*/
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Binary.prototype.put = function (byteValue) {
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// If it's a string and a has more than one character throw an error
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if (typeof byteValue === 'string' && byteValue.length !== 1) {
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throw new error_1.BSONTypeError('only accepts single character String');
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}
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else if (typeof byteValue !== 'number' && byteValue.length !== 1)
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throw new error_1.BSONTypeError('only accepts single character Uint8Array or Array');
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// Decode the byte value once
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var decodedByte;
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if (typeof byteValue === 'string') {
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decodedByte = byteValue.charCodeAt(0);
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}
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else if (typeof byteValue === 'number') {
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decodedByte = byteValue;
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}
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else {
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decodedByte = byteValue[0];
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}
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if (decodedByte < 0 || decodedByte > 255) {
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throw new error_1.BSONTypeError('only accepts number in a valid unsigned byte range 0-255');
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}
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if (this.buffer.length > this.position) {
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this.buffer[this.position++] = decodedByte;
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}
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else {
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var buffer = buffer_1.Buffer.alloc(Binary.BUFFER_SIZE + this.buffer.length);
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// Combine the two buffers together
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this.buffer.copy(buffer, 0, 0, this.buffer.length);
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this.buffer = buffer;
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this.buffer[this.position++] = decodedByte;
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}
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};
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/**
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* Writes a buffer or string to the binary.
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*
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* @param sequence - a string or buffer to be written to the Binary BSON object.
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* @param offset - specify the binary of where to write the content.
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*/
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Binary.prototype.write = function (sequence, offset) {
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offset = typeof offset === 'number' ? offset : this.position;
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// If the buffer is to small let's extend the buffer
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if (this.buffer.length < offset + sequence.length) {
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var buffer = buffer_1.Buffer.alloc(this.buffer.length + sequence.length);
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this.buffer.copy(buffer, 0, 0, this.buffer.length);
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// Assign the new buffer
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this.buffer = buffer;
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}
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if (ArrayBuffer.isView(sequence)) {
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this.buffer.set(ensure_buffer_1.ensureBuffer(sequence), offset);
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this.position =
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offset + sequence.byteLength > this.position ? offset + sequence.length : this.position;
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}
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else if (typeof sequence === 'string') {
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this.buffer.write(sequence, offset, sequence.length, 'binary');
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this.position =
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offset + sequence.length > this.position ? offset + sequence.length : this.position;
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}
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};
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/**
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* Reads **length** bytes starting at **position**.
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*
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* @param position - read from the given position in the Binary.
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* @param length - the number of bytes to read.
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*/
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Binary.prototype.read = function (position, length) {
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length = length && length > 0 ? length : this.position;
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// Let's return the data based on the type we have
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return this.buffer.slice(position, position + length);
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};
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/**
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* Returns the value of this binary as a string.
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* @param asRaw - Will skip converting to a string
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* @remarks
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* This is handy when calling this function conditionally for some key value pairs and not others
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*/
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Binary.prototype.value = function (asRaw) {
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asRaw = !!asRaw;
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// Optimize to serialize for the situation where the data == size of buffer
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if (asRaw && this.buffer.length === this.position) {
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return this.buffer;
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}
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// If it's a node.js buffer object
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if (asRaw) {
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return this.buffer.slice(0, this.position);
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}
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return this.buffer.toString('binary', 0, this.position);
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};
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/** the length of the binary sequence */
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Binary.prototype.length = function () {
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return this.position;
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};
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Binary.prototype.toJSON = function () {
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return this.buffer.toString('base64');
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};
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Binary.prototype.toString = function (format) {
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return this.buffer.toString(format);
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};
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/** @internal */
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Binary.prototype.toExtendedJSON = function (options) {
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options = options || {};
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var base64String = this.buffer.toString('base64');
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var subType = Number(this.sub_type).toString(16);
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if (options.legacy) {
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return {
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$binary: base64String,
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$type: subType.length === 1 ? '0' + subType : subType
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};
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}
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return {
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$binary: {
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base64: base64String,
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subType: subType.length === 1 ? '0' + subType : subType
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}
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};
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};
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Binary.prototype.toUUID = function () {
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if (this.sub_type === Binary.SUBTYPE_UUID) {
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return new uuid_1.UUID(this.buffer.slice(0, this.position));
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}
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throw new error_1.BSONError("Binary sub_type \"" + this.sub_type + "\" is not supported for converting to UUID. Only \"" + Binary.SUBTYPE_UUID + "\" is currently supported.");
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};
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/** @internal */
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Binary.fromExtendedJSON = function (doc, options) {
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options = options || {};
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var data;
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var type;
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if ('$binary' in doc) {
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if (options.legacy && typeof doc.$binary === 'string' && '$type' in doc) {
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type = doc.$type ? parseInt(doc.$type, 16) : 0;
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data = buffer_1.Buffer.from(doc.$binary, 'base64');
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}
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else {
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if (typeof doc.$binary !== 'string') {
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type = doc.$binary.subType ? parseInt(doc.$binary.subType, 16) : 0;
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data = buffer_1.Buffer.from(doc.$binary.base64, 'base64');
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}
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}
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}
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else if ('$uuid' in doc) {
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type = 4;
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data = uuid_utils_1.uuidHexStringToBuffer(doc.$uuid);
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}
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if (!data) {
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throw new error_1.BSONTypeError("Unexpected Binary Extended JSON format " + JSON.stringify(doc));
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}
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return new Binary(data, type);
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};
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/** @internal */
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Binary.prototype[Symbol.for('nodejs.util.inspect.custom')] = function () {
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return this.inspect();
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};
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Binary.prototype.inspect = function () {
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var asBuffer = this.value(true);
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return "new Binary(Buffer.from(\"" + asBuffer.toString('hex') + "\", \"hex\"), " + this.sub_type + ")";
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};
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/**
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* Binary default subtype
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* @internal
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*/
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Binary.BSON_BINARY_SUBTYPE_DEFAULT = 0;
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/** Initial buffer default size */
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Binary.BUFFER_SIZE = 256;
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/** Default BSON type */
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Binary.SUBTYPE_DEFAULT = 0;
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/** Function BSON type */
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Binary.SUBTYPE_FUNCTION = 1;
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/** Byte Array BSON type */
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Binary.SUBTYPE_BYTE_ARRAY = 2;
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/** Deprecated UUID BSON type @deprecated Please use SUBTYPE_UUID */
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Binary.SUBTYPE_UUID_OLD = 3;
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/** UUID BSON type */
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Binary.SUBTYPE_UUID = 4;
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/** MD5 BSON type */
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Binary.SUBTYPE_MD5 = 5;
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/** Encrypted BSON type */
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Binary.SUBTYPE_ENCRYPTED = 6;
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/** Column BSON type */
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Binary.SUBTYPE_COLUMN = 7;
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/** User BSON type */
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Binary.SUBTYPE_USER_DEFINED = 128;
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return Binary;
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}());
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exports.Binary = Binary;
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Object.defineProperty(Binary.prototype, '_bsontype', { value: 'Binary' });
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//# sourceMappingURL=binary.js.map
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