puppeteer-core
Version:
A high-level API to control headless Chrome over the DevTools Protocol
65 lines (64 loc) • 2.45 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.PipeTransport = void 0;
/**
* Copyright 2018 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
const helper_js_1 = require("../common/helper.js");
class PipeTransport {
constructor(pipeWrite, pipeRead) {
this._pipeWrite = pipeWrite;
this._pendingMessage = '';
this._eventListeners = [
helper_js_1.helper.addEventListener(pipeRead, 'data', (buffer) => this._dispatch(buffer)),
helper_js_1.helper.addEventListener(pipeRead, 'close', () => {
if (this.onclose)
this.onclose.call(null);
}),
helper_js_1.helper.addEventListener(pipeRead, 'error', helper_js_1.debugError),
helper_js_1.helper.addEventListener(pipeWrite, 'error', helper_js_1.debugError),
];
this.onmessage = null;
this.onclose = null;
}
send(message) {
this._pipeWrite.write(message);
this._pipeWrite.write('\0');
}
_dispatch(buffer) {
let end = buffer.indexOf('\0');
if (end === -1) {
this._pendingMessage += buffer.toString();
return;
}
const message = this._pendingMessage + buffer.toString(undefined, 0, end);
if (this.onmessage)
this.onmessage.call(null, message);
let start = end + 1;
end = buffer.indexOf('\0', start);
while (end !== -1) {
if (this.onmessage)
this.onmessage.call(null, buffer.toString(undefined, start, end));
start = end + 1;
end = buffer.indexOf('\0', start);
}
this._pendingMessage = buffer.toString(undefined, start);
}
close() {
this._pipeWrite = null;
helper_js_1.helper.removeEventListeners(this._eventListeners);
}
}
exports.PipeTransport = PipeTransport;