Object Storage Service:Resumable upload (OSS SDK for Go 1.0)

package main

import (
    "log"
    
    "github.com/aliyun/aliyun-oss-go-sdk/oss"
)

func main() {
    // Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. 
    provider, err := oss.NewEnvironmentVariableCredentialsProvider()
    if err != nil {
        log.Fatalf("Failed to create credentials provider: %v", err)
    }

    // Create an OSSClient instance. 
    // Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. Specify your actual endpoint. 
    // Specify the region in which the bucket is located. For example, if your bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. Specify your actual endpoint.
    clientOptions := []oss.ClientOption{oss.SetCredentialsProvider(&provider)}
    clientOptions = append(clientOptions, oss.Region("yourRegion"))
    // Specify the signature version.
    clientOptions = append(clientOptions, oss.AuthVersion(oss.AuthV4))
    client, err := oss.New("yourEndpoint", "", "", clientOptions...)
    if err != nil {
        log.Fatalf("Failed to create OSS client: %v", err)
    }

    // Specify the name of the bucket. Example: examplebucket. 
    bucket, err := client.Bucket("examplebucket")
    if err != nil {
        log.Fatalf("Failed to get bucket: %v", err)
    }

     // When you use UploadFile to perform resumable upload, the number of parts cannot exceed 10000. 
    // Specify the size of each part based on the size of the object that you want to upload. The size of each part ranges from 100 KB to 5 GB. Default value: 100 KB (100 x 1024). 
    // Use oss.Routines to set the number of parts that can be uploaded in parallel to 3. 
    // Specify the full path of the object. Do not include the bucket name in the full path. Example: exampledir/exampleobject.txt. 
    // Specify the full path of the local file. Example: D:\\localpath\\examplefile.txt. By default, if you do not specify the path of the local file, the file is uploaded from the path of the project to which the sample program belongs. 
    err = bucket.UploadFile("exampledir/exampleobject.txt", "D:\\localpath\\examplefile.txt", 100*1024, oss.Routines(3), oss.Checkpoint(true, ""))
    if err != nil {
        log.Fatalf("Failed to upload file: %v", err)
    }

    log.Println("File uploaded successfully.")
}