// Bucket name, which consists of bucketname-appid (appid must be included), can be viewed in the COS console. https://console.tencentcloud.com/cos5/bucket
let bucket = "examplebucket-1250000000";
//The location identifier of an object in a bucket, also known as the object key
let cosPath = "exampleobject.txt"; 

let request = new PresignedUrlRequest(bucket, cosPath, http.RequestMethod.PUT);
try {
  let result = await CosXmlBaseService.default().buildPresignedUrl(request)
  // result is the signed upload URL
  if(result){
    // Upload data
    let httpRequest = http.createHttp();
    try {
      let data = await httpRequest.request(result, { method: http.RequestMethod.PUT, extraData: 'data to put' });
      httpRequest.destroy();  
  } catch (err) {
    httpRequest.destroy();  
    // Upload exception handling
  }
}
} catch (e) {
  // Exception handling
}

// Bucket name, which consists of bucketname-appid (appid must be included), can be viewed in the COS console. https://console.tencentcloud.com/cos5/bucket
let bucket = "examplebucket-1250000000";
//The location identifier of an object in a bucket, also known as the object key
let cosPath = "exampleobject.txt"; 

let request = new PresignedUrlRequest(bucket, cosPath, http.RequestMethod.GET);
try {
  let result = await CosXmlBaseService.default().buildPresignedUrl(request)
  // result is the signed download URL
  if(result){
    // Download data
    let httpRequest = http.createHttp();
    try {
      let data = await httpRequest.request(result, { method: http.RequestMethod.GET });
      httpRequest.destroy();  
  } catch (err) {
    httpRequest.destroy();  
    // Download exception handling
  }
}
} catch (e) {
  // Exception handling
}