Le paramètre auto-orient permet de définir si les images stockées dans Object Storage Service (OSS) doivent subir une orientation automatique. Cette rubrique décrit ce paramètre et fournit des exemples d'utilisation.
Paramètres
Action : auto-orient
Le tableau suivant présente les valeurs valides du paramètre auto-orient.
|
Format |
Description |
Valeur valide |
|
[value] |
Indique s'il faut appliquer une orientation automatique à l'image. |
0 et 1.
|
Remarques sur l'utilisation
Si aucun paramètre d'orientation n'est spécifié pour l'image source, le paramètre auto-orient ne produit aucun effet.
La plupart des outils permettent d'appliquer une orientation automatique aux images dont les paramètres d'orientation sont définis. Par conséquent, les images que vous consultez peuvent avoir subi une orientation automatique.
Les images traitées à l'aide du paramètre auto-orient sont recompressées, ce qui entraîne des différences de taille entre les images traitées et les images sources.
Méthodes
Appliquer une orientation automatique aux images publiques en lecture ou en lecture-écriture
Spécifiez le paramètre auto-orient dans l'URL des images publiques en lecture ou en lecture-écriture pour leur appliquer une orientation automatique.
Dans les exemples suivants, une image nommée f.jpg située dans le bucket image-demo de la région Chine (Hangzhou) sert d'image source. L'image est hébergée à l'URL suivante :
https://image-demo.oss-cn-hangzhou.aliyuncs.com/f.jpg
Les navigateurs corrigent automatiquement l'orientation d'affichage de cette image en fonction de ses métadonnées intégrées :

-
Redimensionner l'image tout en conservant son orientation
Configurez les paramètres suivants :
Redimensionnez l'image à une largeur de 100 pixels : resize,w_100
Désactivez l'orientation automatique : auto-orient,0
URL utilisée pour traiter l'image : https://image-demo.oss-cn-hangzhou.aliyuncs.com/f.jpg?x-oss-process=image/resize,w_100/auto-orient,0.

-
Redimensionner et appliquer une orientation automatique à l'image
Configurez les paramètres suivants :
Redimensionnez l'image à une largeur de 100 pixels : resize,w_100
Appliquez une orientation automatique à l'image : auto-orient,1
URL utilisée pour traiter l'image : https://image-demo.oss-cn-hangzhou.aliyuncs.com/f.jpg?x-oss-process=image/resize,w_100/auto-orient,1.

Appliquer une orientation automatique aux images privées
Utilisez les SDK OSS et l'API OSS pour appliquer une orientation automatique aux images privées.
Utiliser les SDK OSS
L'exemple de code suivant montre comment appliquer une orientation automatique à une image privée à l'aide des SDK OSS pour les langages de programmation courants. Pour plus d'informations sur l'utilisation des SDK OSS pour d'autres langages, consultez la page Présentation.
Java
Le SDK OSS pour Java version 3.17.4 ou ultérieure est requis.
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 bucket in which the private image is stored. 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 image that you want to process. Do not include the bucket name in the full path.
String objectName = "example.jpg";
// Specify the full path of the processed image. Example: D:\\dest.jpg. If an image that has the same name already exists in the path, the processed image overwrites the image. Otherwise, the processed image is saved in the path.
String pathName = "D:\\dest.jpg";
// Create an OSSClient instance.
// Call the shutdown method to release resources when the OSSClient is no longer in use.
ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);
OSS ossClient = OSSClientBuilder.create()
.endpoint(endpoint)
.credentialsProvider(credentialsProvider)
.clientConfiguration(clientBuilderConfiguration)
.region(region)
.build();
try {
// Resize and auto-orient the image.
String image = "image/resize,w_100/auto-orient,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
Le SDK OSS pour PHP version 2.7.0 ou ultérieure est requis.
<?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 name of the bucket. Example: examplebucket.
$bucket= "examplebucket";
// Specify the full path of the image that you want to process. Do not include the bucket name in the full path.
$object = "example.jpg";
// Specify the full path of the processed image. Example: D:\\dest.jpg. If an image that has the same name already exists in the path, the processed image overwrites the image. Otherwise, the processed image is saved in the path.
// 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 and auto-orient the image.
$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 your local computer.
$ossClient->getObject($bucket, $object, $options);
Python
Le SDK OSS pour Python version 2.18.4 ou ultérieure est requis.
# -*- 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.
# 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 and auto-orient the image.
image = 'image/resize,w_100/auto-orient,1'
bucket.get_object_to_file(key, new_pic, process=image)
Go
Le SDK OSS pour Go version 3.0.2 ou ultérieure est requis.
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. Specify your actual endpoint.
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 and auto-orient the image.
image := "image/resize,w_100/auto-orient,1"
err = bucket.GetObjectToFile(sourceImageName, targetImageName, oss.Process(image))
if err != nil {
HandleError(err)
}
}
Utiliser l'API RESTful
Si votre activité nécessite un niveau élevé de personnalisation, vous pouvez appeler directement les API RESTful. Pour ce faire, vous devez intégrer le calcul de signature dans votre code. Pour plus d'informations, consultez la section (Recommandé) Inclure une signature V4.
Spécifiez le paramètre auto-orient dans l'opération GetObject pour appliquer une orientation automatique à une image privée.
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