Method _flush

src/parsers/Multipart.js:70–83

(done)

  }

  _flush(done) {
    if (
      (this.state === STATE.HEADER_FIELD_START && this.index === 0) ||
      (this.state === STATE.PART_DATA && this.index === this.boundary.length)
    ) {
      this._handleCallback('partEnd');
      this._handleCallback('end');
      done();
    } else if (this.state !== STATE.END) {
      done(this._endUnexpected());
    } else {
      done();
    }
  }

  initWithBoundary(str) {
    this.boundary = Buffer.from(`\r\n--${str}`);