Object Storage Service:Use the SDK for Go to configure Referer-based hotlink protection to prevent unauthorized reference to OSS objects

The following code provides an example on how to configure hotlink protection for a bucket:

package main

import (
	"log"

	"github.com/aliyun/aliyun-oss-go-sdk/oss"
)

func main() {
	// Specify the name of the bucket. 
	bucketName := "examplebucket"

	// 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("Error creating 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 the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. Specify the actual region.
	clientOptions := []oss.ClientOption{oss.SetCredentialsProvider(&provider)}
	clientOptions = append(clientOptions, oss.Region("yourRegion"))
	// Specify the version of the signature algorithm.
	clientOptions = append(clientOptions, oss.AuthVersion(oss.AuthV4))
	client, err := oss.New("yourEndpoint", "", "", clientOptions...)
	if err != nil {
		log.Fatalf("Error creating OSS client: %v", err)
	}

	var setBucketReferer oss.RefererXML
	// Add Referers to the Referer whitelist and specify that an empty Referer field is not allowed. You can use an asterisk (*) or a question mark (?) as a wildcard to set the Referer parameter. 
	setBucketReferer.RefererList = []string{
		"http://www.aliyun.com",
		"https://www.aliyun.com",
		"https://www.help.aliyun.com",
		"http://www.?.aliyuncs.com",
	}
	// Add a Referer blacklist. OSS SDK for Go V2.2.8 or later supports Referer blacklist settings. 
	setBucketReferer.RefererBlacklist = &oss.RefererBlacklist{
		Referer: []string{
			"http://www.refuse.com",
			"https://*.hack.com",
			"http://ban.*.com",
			"https://www.?.deny.com",
		},
	}
	setBucketReferer.AllowEmptyReferer = true
	boolFalse := false
	setBucketReferer.AllowTruncateQueryString = &boolFalse

	err = client.SetBucketRefererV2(bucketName, setBucketReferer)
	if err != nil {
		log.Fatalf("Error setting bucket referer: %v", err)
	}

	log.Println("Set Bucket Referer Success")
}

The following code provides an example on how to query the hotlink protection configurations of a bucket:

package main

import (
	"log"

	"github.com/aliyun/aliyun-oss-go-sdk/oss"
)

func main() {
	// Specify the name of the bucket. 
	bucketName := "yourBucketName"

	// Obtain the access credentials from the 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("Error creating 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 the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. Specify the actual region.
	clientOptions := []oss.ClientOption{oss.SetCredentialsProvider(&provider)}
	clientOptions = append(clientOptions, oss.Region("yourRegion"))
	// Specify the version of the signature algorithm.
	clientOptions = append(clientOptions, oss.AuthVersion(oss.AuthV4))
	client, err := oss.New("yourEndpoint", "", "", clientOptions...)
	if err != nil {
		log.Fatalf("Error creating OSS client: %v", err)
	}

	// Query the hotlink protection configurations. 
	refRes, err := client.GetBucketReferer(bucketName)
	if err != nil {
		log.Fatalf("Error getting bucket referer: %v", err)
	}

	// Display the hotlink protection configurations. 
	log.Println("Allow Empty Referer:", refRes.AllowEmptyReferer)
	if refRes.AllowTruncateQueryString != nil {
		log.Println("Allow Truncate QueryString:", *refRes.AllowTruncateQueryString)
	}
	if len(refRes.RefererList) > 0 {
		for _, referer := range refRes.RefererList {
			log.Println("Referer List:", referer)
		}
	}
	if refRes.RefererBlacklist != nil && len(refRes.RefererBlacklist.Referer) > 0 {
		for _, refererBlack := range refRes.RefererBlacklist.Referer {
			log.Println("Referer Black List:", refererBlack)
		}
	}

	log.Println("Get Bucket Referer Success")
}

The following code provides an example on how to delete the hotlink protection configurations of a bucket:

package main

import (
	"log"

	"github.com/aliyun/aliyun-oss-go-sdk/oss"
)

func main() {
	// Specify the name of the bucket. 
	bucketName := "yourBucketName"

	// Obtain the access credentials from the 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("Error creating 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 the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. Specify the actual region.
	clientOptions := []oss.ClientOption{oss.SetCredentialsProvider(&provider)}
	clientOptions = append(clientOptions, oss.Region("yourRegion"))
	// Specify the version of the signature algorithm.
	clientOptions = append(clientOptions, oss.AuthVersion(oss.AuthV4))
	client, err := oss.New("yourEndpoint", "", "", clientOptions...)
	if err != nil {
		log.Fatalf("Error creating OSS client: %v", err)
	}

	// Delete the hotlink protection configurations. 
	var delBucketReferer oss.RefererXML
	delBucketReferer.RefererList = []string{}
	delBucketReferer.AllowEmptyReferer = true

	err = client.SetBucketRefererV2(bucketName, delBucketReferer)
	if err != nil {
		log.Fatalf("Error clearing bucket referer: %v", err)
	}

	log.Println("Delete Bucket Referer Success")
}