Object Storage Service:Set the image display mode

Set the display mode of public-read or public-read-write images

The oss-console-img-demo-cn-hangzhou bucket that is located in the China (Hangzhou) region is used as an example. The public endpoint of the image is https://oss-console-img-demo-cn-hangzhou.oss-cn-hangzhou.aliyuncs.com. The images used are example.jpg and panda.png in the root directory.

• Resize the image to a width of 200 pixels and set the image to gradual display

  Requirements and parameters:

  • Resize the image to a width of 200 pixels: resize,w_200

  • Set the image to gradual display: interlace,1

  The URL used to process the image is in the following format: https://oss-console-img-demo-cn-hangzhou.oss-cn-hangzhou.aliyuncs.com/example.jpg?x-oss-process=image/resize,w_200/interlace,1

  

• Save the PNG image as a JPG image and set the image to gradual display

  Requirements and parameters:

  • Convert the format of the image to JPG: format,jpg

  • Set the image to gradual display: interlace,1

  The URL used to process the image is in the following format: https://oss-console-img-demo-cn-hangzhou.oss-cn-hangzhou.aliyuncs.com/panda.png?x-oss-process=image/format,jpg/interlace,1

  

Set the display mode of private images

You can use OSS SDKs or API operations to set the display mode of private images.

import com.aliyun.oss.*;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.common.comm.SignVersion;
import com.aliyun.oss.model.GetObjectRequest;
import java.io.File;

public class Demo {
    public static void main(String[] args) throws Throwable {
        // In this example, the endpoint of the China (Hangzhou) region is used. Specify your actual endpoint.
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // Specify the region of the endpoint. Example: cn-hangzhou.
        String region = "cn-hangzhou";
        // 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. 
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // Specify the name of the bucket. Example: examplebucket.
        String bucketName = "examplebucket";
        // Specify the full path of the object. Do not include the bucket name in the full path.
        String objectName = "example.jpg";
        // Specify the full path of the local file. Example: D:\\dest.jpg. If a file that has the same name already exists in the path, the processed image overwrites the file. Otherwise, the processed image is saved in the path.
        String pathName = "D:\\dest.jpg";

        // Create an OSSClient instance.
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);
        OSS ossClient = OSSClientBuilder.create()
                .endpoint(endpoint)
                .credentialsProvider(credentialsProvider)
                .clientConfiguration(clientBuilderConfiguration)
                .region(region)
                .build();

        try {
            // Resize the image to a width of 200 pixels and set the image to gradual display
            String image = "image/resize,w_200/interlace,1";
            GetObjectRequest request = new GetObjectRequest(bucketName, objectName);
            request.setProcess(image);
            // Set the name of the processed image to dest.jpg and save it to your local computer.
            // If you specify only the name of the processed image such as dest.jpg without specifying the local path, the processed image is saved to the local path of the project to which the sample program belongs.
            ossClient.getObject(request, new File("D:\\dest.jpg"));
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}

<?php
if (is_file(__DIR__ . '/../autoload.php')) {
    require_once __DIR__ . '/../autoload.php';
}
if (is_file(__DIR__ . '/../vendor/autoload.php')) {
    require_once __DIR__ . '/../vendor/autoload.php';
}
use OSS\Credentials\EnvironmentVariableCredentialsProvider;
use OSS\OssClient;

// 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 = new EnvironmentVariableCredentialsProvider();
// 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.
$endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
// Specify the bucket name. Example: examplebucket.
$bucket= "examplebucket";
// Specify the full path of the object. Do not include the bucket name in the full path.
$object = "example.jpg";
// Set the name of the processed image to dest.jpg and save it to your local computer.
// If you specify only the name of the processed image such as dest.jpg without specifying the local path, the processed image is saved to the local path of the project to which the sample program belongs.
$download_file = "D:\\dest.jpg";

$config = array(
        "provider" => $provider,
        "endpoint" => $endpoint,        
        "signatureVersion" => OssClient::OSS_SIGNATURE_VERSION_V4,
        // Specify the ID of the Alibaba Cloud region in which the bucket is located.
        "region" => "cn-hangzhou"
    );
$ossClient = new OssClient($config);

// Resize the image to a width of 200 pixels and set the image to gradual display
$image = "image/resize,w_200/interlace,1";

$options = array(
    OssClient::OSS_FILE_DOWNLOAD => $download_file,
    OssClient::OSS_PROCESS => $image);

// Save the processed image to your local computer.
$ossClient->getObject($bucket, $object, $options);                           

# -*- coding: utf-8 -*-
import oss2
from oss2.credentials import EnvironmentVariableCredentialsProvider

# 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. 
auth = oss2.ProviderAuthV4(EnvironmentVariableCredentialsProvider())
# 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.
endpoint = 'https://oss-cn-hangzhou.aliyuncs.com'
# Specify the ID of the Alibaba Cloud region in which the bucket is located.
region = 'cn-hangzhou'
bucket = oss2.Bucket(auth, endpoint, 'examplebucket', region=region)
# Specify the name of the source image. If the image is not stored in the root directory of the bucket, you must include the full path of the image. Example: exampledir/src.gif.
key = 'example.jpg'
# Specify the name of the processed image.
new_pic = 'D:\\dest.jpg'

# Resize the image to a width of 200 pixels and set the image to gradual display
image = 'image/resize,w_200/interlace,1'
bucket.get_object_to_file(key, new_pic, process=image)

package main

import (
	"fmt"
	"os"

	"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.
	client, err := oss.New("https://oss-cn-hangzhou.aliyuncs.com", "", "", oss.SetCredentialsProvider(&provider), oss.AuthVersion(oss.AuthV4), oss.Region("cn-hangzhou"))
	if err != nil {
		HandleError(err)
	}

	// Specify the name of the bucket in which the source image is stored. Example: examplebucket.
	bucketName := "examplebucket"
	bucket, err := client.Bucket(bucketName)
	if err != nil {
		HandleError(err)
	}

	// Specify the name of the source image. If the image is not stored in the root directory of the bucket, you must include the full path of the image. Example: exampledir/src.gif.
	sourceImageName := "example.jpg"
	// Specify the name of the processed image.
	targetImageName := "D://dest.jpg"
	// Resize the image to a width of 200 pixels and set the image to gradual display
	image := "image/resize,w_200/interlace,1"
	err = bucket.GetObjectToFile(sourceImageName, targetImageName, oss.Process(image))
	if err != nil {
		HandleError(err)
	}
}

GET /oss.jpg?x-oss-process=image/bright,50 HTTP/1.1
Host: oss-example.oss-cn-hangzhou.aliyuncs.com
Date: Fri, 28 Oct 2022 06:40:10 GMT
Authorization: OSS qn6q**************:77Dv****************