83 lines
2.0 KiB
JavaScript
83 lines
2.0 KiB
JavaScript
const assert = require('assert-plus')
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const util = require('util')
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const asn1 = require('asn1')
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const Control = require('./control')
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/// --- Globals
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const BerReader = asn1.BerReader
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const 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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const 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) { 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) { return }
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const 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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