mp-mini-axios/src/CancelToken.js

MiniAxios 是一个轻量级 HTTP 客户端库，专为【微信小程序】设计，提供类似 Axios 的 API 接口。它支持请求/响应拦截器、取消请求、自动重试、文件上传/下载等功能。构建后大小11KB，能有效节省小程序包大小。

// CancelToken.js
class Cancel {
  constructor(message) {
    this.message = message;
    this.name = 'Cancel';
  }

  toString() {
    return this.message ? `${this.name}: ${this.message}` : this.name;
  }
}

Cancel.prototype.__CANCEL__ = true;

export class CancelToken {
  constructor(executor) {
    if (typeof executor !== 'function') {
      throw new Error('executor must be a function');
    }

    let resolvePromise;
    this.promise = new Promise(resolve => {
      resolvePromise = resolve;
    });

    executor(message => {
      if (this.reason) {
        return;
      }

      this.reason = new Cancel(message);
      resolvePromise(this.reason);
    });
  }

  throwIfRequested() {
    if (this.reason) {
      throw this.reason;
    }
  }

  static source() {
    let cancel;
    const token = new CancelToken(c => {
      cancel = c;
    });
    return {
      token,
      cancel
    };
  }
}