Upload Callback (SDK for Go)

// Import the dependency package.
import (
     "fmt"
     "bytes"
     "encoding/base64"
     "encoding/json"
     "strings"
     obs "github.com/huaweicloud/huaweicloud-sdk-go-obs/obs"
)

func main() {
    //Obtain an AK/SK pair using environment variables or import the AK/SK pair in other ways. Using hard coding may result in leakage.
    //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.
    ak := os.Getenv("AccessKeyID")
    sk := os.Getenv("SecretAccessKey")
    // (Optional) If you use a temporary AK/SK pair and a security token to access OBS, you are not advised to use hard coding, which may result in information leakage. You can obtain an AK/SK pair using environment variables or import an AK/SK pair in other ways.
    // securityToken := os.Getenv("SecurityToken")
    // Enter the endpoint corresponding to the bucket. CN-Hong Kong is used here as an example. Replace it with the one currently in use.
    endPoint := "https://obs.ap-southeast-1.myhuaweicloud.com"
    // Create an obsClient instance.
    // If you use a temporary AK/SK pair and a security token to access OBS, use the obs.WithSecurityToken method to specify a security token when creating an instance.
    obsClient, err := obs.New(ak, sk, endPoint/*, obs.WithSecurityToken(securityToken)*/)

    input := &obs.PutObjectInput{}
    // Specify the bucket name.
    input.Bucket = "bucketname"
    // Specify the object (example/objectname as an example) to upload.
    input.Key = "objectname"
    input.Body = strings.NewReader("Hello OBS")
    callbackMap := map[string]string{}
    callbackMap["callbackUrl"] = "http://example.com:80"
    // callbackMap["callbackHost"] = "example.com"
    callbackMap["callbackBody"] = "filename=${object}&size=${size}&mimeType=${mimeType}"
    // callbackMap["callbackBodyType"] = "application/x-www-form-urlencoded"
    callbackBuffer := bytes.NewBuffer([]byte{})
    callbackEncoder := json.NewEncoder(callbackBuffer)
    callbackEncoder.SetEscapeHTML(false)
    err := callbackEncoder.Encode(callbackMap)
    if err != nil {
        fmt.Print(err)
        return
    }
    callbackVal := base64.StdEncoding.EncodeToString(callbackBuffer.Bytes())
    output, err := obsClient.PutObject(input, obs.WithCallbackHeader(callbackVal))
    if err == nil {
        // This method must be invoked.
        defer output.CloseCallbackBody()
        fmt.Printf("RequestId:%s\n", output.RequestId)
        fmt.Printf("ETag:%s\n", output.ETag)
        p := make([]byte, 1024)
        var readErr error
        var readCount int
        // Read the callback content.
        for {
            readCount, readErr = output.ReadCallbackBody(p)
            if readCount > 0 {
                fmt.Printf("%s", p[:readCount])
            }
            if readErr != nil {
                break
            }
        }
    } else if obsError, ok := err.(obs.ObsError); ok {
        fmt.Printf("Code:%s\n", obsError.Code)
        fmt.Printf("Message:%s\n", obsError.Message)
    }
}

// Import the dependency package.
import (
     "fmt"
     "bytes"
     "encoding/base64"
     "encoding/json"
     "strings"
     obs "github.com/huaweicloud/huaweicloud-sdk-go-obs/obs"
)

func main() {
    //Obtain an AK/SK pair using environment variables or import the AK/SK pair in other ways. Using hard coding may result in leakage.
    //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.
    ak := os.Getenv("AccessKeyID")
    sk := os.Getenv("SecretAccessKey")
    // (Optional) If you use a temporary AK/SK pair and a security token to access OBS, you are not advised to use hard coding, which may result in information leakage. You can obtain an AK/SK pair using environment variables or import an AK/SK pair in other ways.
    // securityToken := os.Getenv("SecurityToken")
    // Enter the endpoint corresponding to the bucket. CN-Hong Kong is used here as an example. Replace it with the one currently in use.
    endPoint := "https://obs.ap-southeast-1.myhuaweicloud.com"
    // Create an obsClient instance.
    // If you use a temporary AK/SK pair and a security token to access OBS, use the obs.WithSecurityToken method to specify a security token when creating an instance.
    obsClient, err := obs.New(ak, sk, endPoint/*, obs.WithSecurityToken(securityToken)*/)

    input := &obs.UploadFileInput{}
    // Specify the bucket name.
    input.Bucket = "bucketname"
    // Specify the object (example/objectname as an example) to upload.
    input.Key = "objectname"
    // Specify your local file (/tmp/objectname as an example) to upload.
    input.UploadFile = "/tmp/objectname"
    // Specify whether to enable resumable upload (true as an example). The default value is false, indicating that resumable upload is disabled.
    input.EnableCheckpoint = true
    // Specify a part size, in bytes. This example sets each part to 9 MB.
    input.PartSize = 9 * 1024 * 1024
    // Specify the maximum number of parts that can be concurrently uploaded. 5 is used as an example.
    input.TaskNum = 5
    callbackMap := map[string]string{}
    callbackMap["callbackUrl"] = "http://example.com:80"
    // callbackMap["callbackHost"] = "example.com"
    callbackMap["callbackBody"] = "filename=${object}&size=${size}&mimeType=${mimeType}"
    // callbackMap["callbackBodyType"] = "application/x-www-form-urlencoded"
    callbackBuffer := bytes.NewBuffer([]byte{})
    callbackEncoder := json.NewEncoder(callbackBuffer)
    callbackEncoder.SetEscapeHTML(false)
    err := callbackEncoder.Encode(callbackMap)
    if err != nil {
        fmt.Print(err)
        return
    }
    callbackVal := base64.StdEncoding.EncodeToString(callbackBuffer.Bytes())
    output, err := obsClient.UploadFile(input, obs.WithCallbackHeader(callbackVal))
    if err == nil {
        // This method must be invoked.
        defer output.CloseCallbackBody()
        fmt.Printf("RequestId:%s\n", output.RequestId)
        fmt.Printf("ETag:%s\n", output.ETag)
        p := make([]byte, 1024)
        var readErr error
        var readCount int
        // Read the callback content.
        for {
            readCount, readErr = output.ReadCallbackBody(p)
            if readCount > 0 {
                fmt.Printf("%s", p[:readCount])
            }
            if readErr != nil {
                break
            }
        }
    } else if obsError, ok := err.(obs.ObsError); ok {
        fmt.Printf("Code:%s\n", obsError.Code)
        fmt.Printf("Message:%s\n", obsError.Message)
    }
}