How do I upload objects by using streaming upload and object upload? - Object Storage Service

Simple upload is an upload method that you can use to upload an object by calling the PutObject operation. Simple upload includes streaming upload and object upload. Streaming upload uses a file stream or network stream as the data source of an object uploaded to Object Storage Service (OSS). Object upload uses a local file as the data source of an object uploaded to OSS. This topic describes how to use streaming upload and object upload to upload objects.

Usage notes

In this topic, the public endpoint of the China (Hangzhou) region is used. If you want to access OSS by using other Alibaba Cloud services in the same region as OSS, use an internal endpoint. For more information about the regions and endpoints supported by OSS, see Regions and endpoints.
In this topic, access credentials are obtained from environment variables. For more information about how to configure access credentials, see Configure access credentials.
In this topic, an OSSClient instance is created by using an OSS endpoint. If you want to create an OSSClient instance by using custom domain names or Security Token Service (STS), see Initialization.
To perform simple upload, you must have the oss:PutObject permission. For more information, see Attach a custom policy to a RAM user.

Upload a local file

The following sample code provides an example on how to upload a local file to the exampleobject.txt object in the exampledir directory of the examplebucket bucket:

package main

import (
    "fmt"
    "os"
    "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 {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // 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. 
    client, err := oss.New("yourEndpoint", "", "", oss.SetCredentialsProvider(&provider))    
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // Specify the name of the bucket. Example: examplebucket. 
    bucket, err := client.Bucket("examplebucket")
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // Specify the full path of the object. Example: exampledir/exampleobject.txt. Then, specify the full path of the local file. Example: D:\\localpath\\examplefile.txt. 
    err = bucket.PutObjectFromFile("exampledir/exampleobject.txt", "D:\\localpath\\examplefile.txt")
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }
}

Upload a string

The following sample code provides an example on how to upload a string to the exampleobject.txt object in the exampledir directory of the examplebucket bucket:

package main

import (
    "fmt"
    "os"
    "strings"

    "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 {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // 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. 
    client, err := oss.New("yourEndpoint", "", "", oss.SetCredentialsProvider(&provider))
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // Specify the name of the bucket. Example: examplebucket. 
    bucket, err := client.Bucket("examplebucket")
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // Set the storage class of the object to Infrequent Access (IA). 
    storageType := oss.ObjectStorageClass(oss.StorageIA)   

    // Set the access control list (ACL) of the object to private. 
    objectAcl := oss.ObjectACL(oss.ACLPrivate)

    // Upload the "Hello OSS" string to the exampleobject.txt object in the exampledir directory. 
    err = bucket.PutObject("exampledir/exampleobject.txt", strings.NewReader("Hello OSS"), storageType, objectAcl)
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }
}

Upload a byte array

The following sample code provides an example on how to upload a byte array to the exampleobject.txt object in the exampledir directory of the examplebucket bucket:

package main

import (
    "fmt"
    "os"
    "bytes"
    "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 {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // 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. 
    client, err := oss.New("yourEndpoint", "", "", oss.SetCredentialsProvider(&provider))
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // Specify the name of the bucket. Example: examplebucket. 
    bucket, err := client.Bucket("examplebucket")
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // Upload the byte array to the exampleobject.txt object in the exampledir directory. 
    err = bucket.PutObject("exampledir/exampleobject.txt", bytes.NewReader([]byte("yourObjectValueByteArrary")))
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }
}

Upload a file stream

The following sample code provides an example on how to upload a file stream to the exampleobject.txt object in the exampledir directory of the examplebucket bucket:

package main

import (
    "fmt"
    "os"
    "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 {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // 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. 
    client, err := oss.New("yourEndpoint", "", "", oss.SetCredentialsProvider(&provider))
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // Specify the name of the bucket. Example: examplebucket. 
    bucket, err := client.Bucket("examplebucket")
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // Specify the full path of the local file. Example: D:\\localpath\\examplefile.txt. 
    fd, err := os.Open("D:\\localpath\\examplefile.txt")
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }
    defer fd.Close()

    // Upload the file stream to the exampleobject.txt object in the exampledir directory. 
    err = bucket.PutObject("exampledir/ledirexampleobject.txt", fd)
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }
}

Upload a network stream

The following sample code provides an example on how to upload a network stream to the exampleobject.txt object in the exampledir directory of the examplebucket bucket:

package main

import (
    "fmt"
    "os"
    "io"
    "net/http"
    "github.com/aliyun/aliyun-oss-go-sdk/oss"
)

func HandleError(err error) {
    fmt.Println("Error:", err)
    os.Exit(-1)
}


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 {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // 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. 
    client, err := oss.New("yourEndpoint", "", "", oss.SetCredentialsProvider(&provider)) 
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // Specify the name of the bucket. Example: examplebucket. 
    bucket, err := client.Bucket("examplebucket")
    // Specify the full path of the object. Example: exampledir/exampleobject.txt. 
    objectname := "exampledir/exampleobject.txt"
    // Specify the network stream that you want to upload. 
    res,_ := http.Get("https://www.aliyun.com/")
    
    if err != nil {
    HandleError(err)
    }

    err = bucket.PutObject(objectname, io.Reader(res.Body))

    if err != nil {
    HandleError(err)
    }
}

References

For the complete sample code that is used to perform simple upload, visit GitHub.
For more information about the API operation that you can call to perform simple upload, see PutObject.