electron/spec/pipe-transport.ts

38 строки
1.2 KiB
TypeScript

// A small pipe transport for talking to Electron over CDP.
export class PipeTransport {
private _pipeWrite: NodeJS.WritableStream | null;
private _pendingMessage = '';
onmessage?: (message: string) => void;
constructor (pipeWrite: NodeJS.WritableStream, pipeRead: NodeJS.ReadableStream) {
this._pipeWrite = pipeWrite;
pipeRead.on('data', buffer => this._dispatch(buffer));
}
send (message: Object) {
this._pipeWrite!.write(JSON.stringify(message));
this._pipeWrite!.write('\0');
}
_dispatch (buffer: 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, JSON.parse(message)); }
let start = end + 1;
end = buffer.indexOf('\0', start);
while (end !== -1) {
const message = buffer.toString(undefined, start, end);
if (this.onmessage) { this.onmessage.call(null, JSON.parse(message)); }
start = end + 1;
end = buffer.indexOf('\0', start);
}
this._pendingMessage = buffer.toString(undefined, start);
}
}