Class PlatformNode

tfjs-core/src/platforms/platform_node.ts:40–89

}

export class PlatformNode implements Platform {
  private textEncoder: TextEncoder;
  // tslint:disable-next-line:no-any
  util: any;

  constructor() {
    // tslint:disable-next-line:no-require-imports
    this.util = require('util');
    // According to the spec, the built-in encoder can do only UTF-8 encoding.
    // https://developer.mozilla.org/en-US/docs/Web/API/TextEncoder/TextEncoder
    this.textEncoder = new this.util.TextEncoder();
  }

  fetch(path: string, requestInits?: RequestInit): Promise<Response> {
    if (env().global.fetch != null) {
      return env().global.fetch(path, requestInits);
    }

    if (systemFetch == null) {
      systemFetch = getNodeFetch.importFetch();
    }
    return systemFetch(path, requestInits);
  }

  now(): number {
    const time = process.hrtime();
    return time[0] * 1000 + time[1] / 1000000;
  }

  encode(text: string, encoding: string): Uint8Array {
    if (encoding !== 'utf-8' && encoding !== 'utf8') {
      throw new Error(
          `Node built-in encoder only supports utf-8, but got ${encoding}`);
    }
    return this.textEncoder.encode(text);
  }
  decode(bytes: Uint8Array, encoding: string): string {
    if (bytes.length === 0) {
      return '';
    }
    return new this.util.TextDecoder(encoding).decode(bytes);
  }
  isTypedArray(a: unknown): a is Float32Array | Int32Array | Uint8Array
    | Uint8ClampedArray {
    return this.util.types.isFloat32Array(a)
      || this.util.types.isInt32Array(a)
      || this.util.types.isUint8Array(a)
      || this.util.types.isUint8ClampedArray(a);
  }
}

if (env().get('IS_NODE') && !env().get('IS_BROWSER')) {
  env().setPlatform('node', new PlatformNode());