Performing a Resumable Upload

// Create an instance of ObsClient.
var obsClient = new ObsClient({
    // Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables AccessKeyID and SecretAccessKey.
    // The front-end code does not have the process environment variable, so you need to use a module bundler like webpack to define the process variable.
    // Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/usermanual-ca/ca_01_0003.html.
    access_key_id: process.env.AccessKeyID,
    secret_access_key: process.env.SecretAccessKey,
    // Replace the example endpoint with the actual one in your case.
    server: 'https://obs.ap-southeast-1.myhuaweicloud.com'
});

var cp;
var hook;
obsClient.uploadFile({
       Bucket : 'bucketname',
       Key : 'objectname',
       SourceFile : document.getElementById('input-file').files[0],
       PartSize : 9 * 1024 * 1024,
       ProgressCallback : function(transferredAmount, totalAmount, totalSeconds){
           console.log(transferredAmount * 1.0 / totalSeconds / 1024);
           console.log(transferredAmount * 100.0 / totalAmount);
           if(hook && (transferredAmount / totalAmount) > 0.5){
                // Suspend a resumable download task.
               hook.cancel();
           }
       },
       EventCallback : function(eventType, eventParam, eventResult){
           // Handle event response.
       },
       ResumeCallback : function(resumeHook, uploadCheckpoint){
           // Obtain the control parameters for canceling resumable upload.
           hook = resumeHook;
           // Record a breakpoint.
           cp = uploadCheckpoint;
       }
}, function(err, result){
    console.error('Error-->' + err);
    // If an error occurs, call the resumable upload API again to continue the upload task.
    if(err){
       obsClient.uploadFile({
          UploadCheckpoint : cp,
          ProgressCallback : function(transferredAmount, totalAmount, totalSeconds){
              console.log(transferredAmount * 1.0 / totalSeconds / 1024);
              console.log(transferredAmount * 100.0 / totalAmount);
          },
          EventCallback : function(eventType, eventParam, eventResult){
           // Handle event response.
          },
        }, function(err, result){
          if(err){
              console.error('Error-->' + err);
          }else{
              if(result.CommonMsg.Status < 300){
                 console.log('RequestId-->' + result.InterfaceResult.RequestId);
                 console.log('Bucket-->' + result.InterfaceResult.Bucket);
                 console.log('Key-->' + result.InterfaceResult.Key);
                 console.log('Location-->' + result.InterfaceResult.Location);
              }else{
                 console.log('Code-->' + result.CommonMsg.Code);
                 console.log('Message-->' + result.CommonMsg.Message);
              }
        }
      });
    }else {
         console.log('Status-->' + result.CommonMsg.Status);
         if (result.CommonMsg.Status < 300 && result.InterfaceResult) {
                console.log('RequestId-->' + result.InterfaceResult.RequestId);
         }
    }
});