Method onData

packages/engine.io/lib/transports/polling.ts:146–160

(data)

    };

    const onData = (data) => {
      let contentLength;
      if (isBinary) {
        chunks = Buffer.concat([chunks, data]);
        contentLength = chunks.length;
      } else {
        chunks += data;
        contentLength = Buffer.byteLength(chunks);
      }

      if (contentLength > this.maxHttpBufferSize) {
        res.writeHead(413).end();
        cleanup();
      }
    };

    const onEnd = () => {
      this.onData(chunks);