Object Storage Service:Auto-orient

Parameters

Action: auto-orient

Usage notes

• If orientation parameters are not specified for the source image, auto-orient has no effect regardless of the value set.

• Most image viewers and browsers auto-orient images using EXIF data. Images you view locally may already appear correctly oriented, even before any processing is applied.

• Auto-orienting an image triggers re-compression. The processed image may differ in file size from the source.

Process public images

Append the x-oss-process query parameter to the URL of a public-read or public-read-write image.

The following examples use f.jpg from the image-demo bucket in the China (Hangzhou) region:

https://image-demo.oss-cn-hangzhou.aliyuncs.com/f.jpg

Resize and retain the original orientation

Parameters:

• Resize to 100 px wide: resize,w_100

• Disable auto-orient: auto-orient,0

https://image-demo.oss-cn-hangzhou.aliyuncs.com/f.jpg?x-oss-process=image/resize,w_100/auto-orient,0

Resize and auto-orient

Parameters:

• Resize to 100 px wide: resize,w_100

• Auto-orient: auto-orient,1

https://image-demo.oss-cn-hangzhou.aliyuncs.com/f.jpg?x-oss-process=image/resize,w_100/auto-orient,1

Process private images

For private images, use OSS SDKs or the OSS API to include request signing.

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 {
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        String region = "cn-hangzhou";
        // Load credentials from environment variables OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET.
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        String bucketName = "examplebucket";
        String objectName = "example.jpg";

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

        try {
            String image = "image/resize,w_100/auto-orient,1";
            GetObjectRequest request = new GetObjectRequest(bucketName, objectName);
            request.setProcess(image);
            // Save the processed image. If a file with the same name already exists, it is overwritten.
            ossClient.getObject(request, new File("D:\\dest.jpg"));
        } catch (OSSException oe) {
            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("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;

// Load credentials from environment variables OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET.
$provider = new EnvironmentVariableCredentialsProvider();
$endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
$bucket = "examplebucket";
$object = "example.jpg";
$download_file = "D:\\dest.jpg";

$config = array(
    "provider" => $provider,
    "endpoint" => $endpoint,
    "signatureVersion" => OssClient::OSS_SIGNATURE_VERSION_V4,
    "region" => "cn-hangzhou"
);
$ossClient = new OssClient($config);

$image = "image/resize,w_100/auto-orient,1";

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

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

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

# Load credentials from environment variables OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET.
auth = oss2.ProviderAuthV4(EnvironmentVariableCredentialsProvider())
endpoint = 'https://oss-cn-hangzhou.aliyuncs.com'
region = 'cn-hangzhou'
bucket = oss2.Bucket(auth, endpoint, 'examplebucket', region=region)

key = 'example.jpg'
new_pic = 'D:\\dest.jpg'

image = 'image/resize,w_100/auto-orient,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() {
	// Load credentials from environment variables OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET.
	provider, err := oss.NewEnvironmentVariableCredentialsProvider()
	if err != nil {
		HandleError(err)
	}

	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)
	}

	bucket, err := client.Bucket("examplebucket")
	if err != nil {
		HandleError(err)
	}

	sourceImageName := "example.jpg"
	targetImageName := "D://dest.jpg"

	image := "image/resize,w_100/auto-orient,1"
	err = bucket.GetObjectToFile(sourceImageName, targetImageName, oss.Process(image))
	if err != nil {
		HandleError(err)
	}
}

GET /oss.jpg?x-oss-process=image/resize,w_100/auto-orient,1 HTTP/1.1
Host: oss-example.oss-cn-hangzhou.aliyuncs.com
Date: Fri, 28 Oct 2022 06:40:10 GMT
Authorization: OSS4-HMAC-SHA256 Credential=LTAI********************/20250417/cn-hangzhou/oss/aliyun_v4_request,Signature=a7c3554c729d71929e0b84489addee6b2e8d5cb48595adfc51868c299c0c218e