基于request上传下载控制

//进度回调的Callback 
let progressCallback = (progress: request.agent.Progress) => { 
  console.info('download task progress：'+progress.sizes+'/'+progress.processed);  }; 
request.agent.create(context, config1).then((task: request.agent.Task) => { 
  console.log(task.tid) 
  //开启进度回调监听 
  task.on('progress', progressCallback); 
  console.info(`Succeeded in creating a download task. result: ${task.tid}`); 
  task.on('completed', createOnCallback); 
  task.start((err: BusinessError) => { 
    if (err) { 
      console.error(`Failed to start the download task, Code: ${err.code}, message: ${err.message}`); 
      return; 
    } 
    console.info(`Succeeded in starting a download task.`); 
  }); 
  console.info(`Succeeded in creating a download task. result: ${task.tid}`); 
}).catch((err: BusinessError) => { 
  console.error(`Failed to create a download task, Code: ${err.code}, message: ${err.message}`); 
});

request.downloadFile(context.getApplicationContext(), { 
  url: 'xxxxx', 
  filePath: filesDir + '/文件路径', 
  enableMetered: true 
}).then((downloadTask: request.DownloadTask) => { 
  let progresCallback = (receivedSize: number, totalSize: number) => { 
    console.info("download receivedSize:" + receivedSize + " totalSize:" + totalSize); 
  }; 
  //开启进度回调 
  downloadTask.on('progress', progresCallback); 
})

request.agent.create(getContext(), config).then((task: request.agent.Task) => { 
  // pause暂停任务 
  task.pause((err: BusinessError) => { 
    if (err) { 
      console.error(`Failed to pause the download task, Code: ${err.code}, message:    ${err.message}`); 
      return; 
    } 
    console.info(`Succeeded in pausing a download task. `); 
  }); 
  console.info(`Succeeded in creating a download task. result: ${task.tid}`); 
}).catch((err: BusinessError) => { 
  console.error(`Failed to create a download task, Code: ${err.code}, message: ${err.message}`); 
});
request.agent.create(getContext(), config).then((task: request.agent.Task) => { 
  // resume恢复下载任务 
  task.resume((err: BusinessError) => { 
    if (err) { 
      console.error(`Failed to resume the download task, Code: ${err.code}, message:   ${err.message}`); 
      return; 
    } 
    console.info(`Succeeded in resuming a download task. `); 
  }); 
  console.info(`Succeeded in creating a download task. result: ${task.tid}`); 
}).catch((err: BusinessError) => { 
  console.error(`Failed to create a download task, Code: ${err.code}, message: ${err.message}`); 
});

let attachments: Array<request.agent.FormItem> = [{ 
  name: "createTest", 
  value: { 
    filename: "createTest.mp4", 
    mimeType: "application/octet-stream", 
    path: "./createTest.mp4", 
  } 
}]; 
let config: request.agent.Config = { 
  //任务操作选项。UPLOAD表示上传任务。DOWNLOAD表示下载任务。 
  action: request.agent.Action.UPLOAD, 
  url: 'http://127.0.0.1', 
  title: 'createTest', 
  description: 'Sample code for create task', 
  //下载的模式，FOREGROUND表示前台任务；BACKGROUND表示后台任务。 
  mode: request.agent.Mode.BACKGROUND, 
  //覆写配置true，覆盖已存在的文件。 false，下载失败。 
  overwrite: false, 
  method: "PUT", 
  data: attachments, 
  saveas: "./", 
  network: request.agent.Network.CELLULAR, 
  //是否允许在按流量计费的网络中工作，默认为false。 
  metered: false, 
  roaming: true, 
  //是否为后台任务启用自动重试，仅应用于后台任务，默认为true。 
  retry: true, 
  //是否允许重定向，默认为true。 
  redirect: true, 
  index: 0, 
  gauge: true, 
  //如果设置为true，在上传/下载无法获取文件大小时任务失败。 
  precise: false, 
  token: "it is a secret"， 
  //任务的优先级。任务模式相同的情况下，该配置项的数字越小优先级越高，默认值为0。 
  priority:0 
}; 
request.agent.create(getContext(), config, (err: BusinessError, task: request.agent.Task) => { 
  if (err) { 
    console.error(`Failed to create a download task, Code: ${err.code}, message: ${err.message}`); 
    return; 
  } 
  console.info(`Succeeded in creating a download task. result: ${task.config}`); 
});

let config1: request.agent.Config  =  { 
  action: request.agent.Action.DOWNLOAD, 
  url: "https://fe-static.xhscdn.com/mp/red/bc446184a0c84aa785ea3cada920f6ac.zip", 
  overwrite: true, 
  method: 'GET', 
  //保存的地址，默认为cache目录下，如果需要保存在子目录下需要提前手动创建。 
  saveas: './', 
  mode: request.agent.Mode.BACKGROUND, 
  gauge: true, 
  priority:0 
} 
let createOnCallback2 = (progress: request.agent.Progress) => { 
  console.info('download task pro.'+progress.sizes+'/'+progress.processed); 
}; 
let createOnCallback = (progress: request.agent.Progress) => { 
 
  console.info('downloadTask complete,filesDir:' ); 
 
}; 
let createOnCallback1 = (progress: request.agent.Progress) => { 
  console.info('download task failed.'+progress); 
}; 
request.agent.create(context, config1).then((task: request.agent.Task) => { 
  console.log(task.tid) 
  task.on('progress', createOnCallback2); 
  task.on('failed', createOnCallback1); 
  console.info(`Succeeded in creating a download task. result: ${task.tid}`); 
  task.on('completed', createOnCallback); 
  task.start((err: BusinessError) => { 
    if (err) { 
      console.error(`Failed to start the download task, Code: ${err.code}, message: ${err.message}`); 
      return; 
    } 
    console.info(`Succeeded in starting a download task.`); 
  }); 
  console.info(`Succeeded in creating a download task. result: ${task.tid}`); 
}).catch((err: BusinessError) => { 
  console.error(`Failed to create a download task, Code: ${err.code}, message: ${err.message}`); 
});

let responseCallback = (response: request.agent.HttpResponse) => { 
  console.info('download task response.'+JSON.stringify(response)+JSON.stringify(response.headers)); 
}; 
task.on('response',responseCallback)