88 lines
2.0 KiB
JavaScript
88 lines
2.0 KiB
JavaScript
var assert = require('assert-plus');
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var util = require('util');
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var asn1 = require('asn1');
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var Control = require('./control');
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///--- Globals
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var BerReader = asn1.BerReader;
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var BerWriter = asn1.BerWriter;
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///--- API
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function PagedResultsControl(options) {
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assert.optionalObject(options);
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options = options || {};
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options.type = PagedResultsControl.OID;
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if (options.value) {
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if (Buffer.isBuffer(options.value)) {
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this.parse(options.value);
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} else if (typeof (options.value) === 'object') {
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this._value = options.value;
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} else {
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throw new TypeError('options.value must be a Buffer or Object');
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}
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options.value = null;
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}
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Control.call(this, options);
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}
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util.inherits(PagedResultsControl, Control);
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Object.defineProperties(PagedResultsControl.prototype, {
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value: {
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get: function () { return this._value || {}; },
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configurable: false
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}
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});
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PagedResultsControl.prototype.parse = function parse(buffer) {
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assert.ok(buffer);
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var ber = new BerReader(buffer);
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if (ber.readSequence()) {
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this._value = {};
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this._value.size = ber.readInt();
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this._value.cookie = ber.readString(asn1.Ber.OctetString, true);
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//readString returns '' instead of a zero-length buffer
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if (!this._value.cookie)
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this._value.cookie = Buffer.alloc(0);
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return true;
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}
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return false;
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};
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PagedResultsControl.prototype._toBer = function (ber) {
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assert.ok(ber);
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if (!this._value)
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return;
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var writer = new BerWriter();
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writer.startSequence();
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writer.writeInt(this.value.size);
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if (this.value.cookie && this.value.cookie.length > 0) {
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writer.writeBuffer(this.value.cookie, asn1.Ber.OctetString);
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} else {
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writer.writeString(''); //writeBuffer rejects zero-length buffers
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}
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writer.endSequence();
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ber.writeBuffer(writer.buffer, 0x04);
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};
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PagedResultsControl.prototype._json = function (obj) {
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obj.controlValue = this.value;
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return obj;
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};
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PagedResultsControl.OID = '1.2.840.113556.1.4.319';
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///--- Exports
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module.exports = PagedResultsControl;
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