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/**
* 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.
*/
import {
helper,
debugError,
PuppeteerEventListener,
} from '../common/helper.js';
import { ConnectionTransport } from '../common/ConnectionTransport.js';
export class PipeTransport implements ConnectionTransport {
_pipeWrite: NodeJS.WritableStream;
_pendingMessage: string;
_eventListeners: PuppeteerEventListener[];
onclose?: () => void;
onmessage?: () => void;
constructor(
pipeWrite: NodeJS.WritableStream,
pipeRead: NodeJS.ReadableStream
) {
this._pipeWrite = pipeWrite;
this._pendingMessage = '';
this._eventListeners = [
helper.addEventListener(pipeRead, 'data', (buffer) =>
this._dispatch(buffer)
),
helper.addEventListener(pipeRead, 'close', () => {
if (this.onclose) this.onclose.call(null);
}),
helper.addEventListener(pipeRead, 'error', debugError),
helper.addEventListener(pipeWrite, 'error', debugError),
];
this.onmessage = null;
this.onclose = null;
}
send(message: string): void {
this._pipeWrite.write(message);
this._pipeWrite.write('\0');
}
_dispatch(buffer: Buffer): void {
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(): void {
this._pipeWrite = null;
helper.removeEventListeners(this._eventListeners);
}
}
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