图片缩放

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

# 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
auth = oss2.ProviderAuthV4(EnvironmentVariableCredentialsProvider())

# 填写Bucket名称
bucket = 'examplebucket'

# 填写Bucket所在地域对应的Endpoint。以华东1（杭州）为例
endpoint = 'https://oss-cn-hangzhou.aliyuncs.com'

# 填写阿里云通用Region ID
region = 'cn-hangzhou'
bucket = oss2.Bucket(auth, endpoint, bucket, region=region)

# 指定原图名称。如果图片不在Bucket根目录，需携带图片完整路径，例如exampledir/exampleobject.jpg
key = 'exampledir/exampleobject.png'

# 指定过期时间，单位秒
expire_time = 3600

# 图片缩放，parame_value需要替换为具体的参数和值，如“p_50”表示图片等比例缩小为之前的50%
image_process = 'image/resize,parame_value'

# 生成签名URL，带上图片处理参数
url = bucket.sign_url('GET', key, expire_time, params={'x-oss-process': image_process}, slash_safe=True)

# 打印签名URL
print(url)

package com.aliyun.oss.demo;
import com.aliyun.oss.*;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.common.comm.SignVersion;
import com.aliyun.oss.model.GeneratePresignedUrlRequest;
import java.net.URL;
import java.util.Date;

public class Demo {
    public static void main(String[] args) throws Throwable {
        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // 填写Bucket名称，例如examplebucket。
        String bucketName = "examplebucket";
        // 填写Object完整路径。如果图片不在Bucket根目录，需携带图片完整路径，例如exampledir/exampleobject.jpg
        String objectName = "exampledir/exampleobject.png";
        // 填写Bucket所在地域。以华东1（杭州）为例，Region填写为cn-hangzhou。
        String region = "cn-hangzhou";

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

        try {
            // 图片缩放，parame_value需要替换为具体的参数和值，如“p_50”表示图片等比例缩小为之前的50%
            String style = "image/resize,parame_value";
            // 指定签名URL过期时间为3600秒)
            Date expiration = new Date(new Date().getTime() + 3600 );
            GeneratePresignedUrlRequest req = new GeneratePresignedUrlRequest(bucketName, objectName, HttpMethod.GET);
            req.setExpiration(expiration);
            req.setProcess(style);
            URL signedUrl = ossClient.generatePresignedUrl(req);
            System.out.println(signedUrl);
        } 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();
            }
        }
    }
}

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() {
	// 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
	provider, err := oss.NewEnvironmentVariableCredentialsProvider()
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}

	// 创建OSSClient实例。
	// yourEndpoint填写Bucket对应的Endpoint，以华东1（杭州）为例，填写为https://oss-cn-hangzhou.aliyuncs.com。其它Region请按实际情况填写。
	// yourRegion填写Bucket所在地域，以华东1（杭州）为例，填写为cn-hangzhou。其它Region请按实际情况填写。
	clientOptions := []oss.ClientOption{oss.SetCredentialsProvider(&provider)}
	clientOptions = append(clientOptions, oss.Region("yourRegion"))
	// 设置签名版本
	clientOptions = append(clientOptions, oss.AuthVersion(oss.AuthV4))
	client, err := oss.New("yourEndpoint", "", "", clientOptions...)
	if err != nil {
		HandleError(err)
	}

	// 指定图片所在Bucket的名称，例如examplebucket。
	bucketName := "examplebucket"
	bucket, err := client.Bucket(bucketName)
	if err != nil {
		HandleError(err)
	}
	// 指定图片名称。如果图片不在Bucket根目录，需携带文件完整路径，例如exampledir/exampleobject.jpg。
	ossImageName := "exampledir/exampleobject.png"
	// 生成带签名的URL，并指定过期时间为3600s。（最长有效时间为32400秒）
	// 图片缩放，parame_value需要替换为具体的参数和值，如“p_50”表示图片等比例缩小为之前的50%
	signedURL, err := bucket.SignURL(ossImageName, oss.HTTPGet, 3600, oss.Process("image/resize,parame_value"))
	if err != nil {
		HandleError(err)
	} else {
		fmt.Println(signedURL)
	}
}

<?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;

// 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
$provider = new EnvironmentVariableCredentialsProvider();
// yourEndpoint填写Bucket所在地域对应的Endpoint。以华东1（杭州）为例，Endpoint填写为https://oss-cn-hangzhou.aliyuncs.com。
$endpoint = "yourEndpoint";
// 填写Bucket名称，例如examplebucket。
$bucket= "examplebucket";
// 填写Object完整路径，例如exampledir/exampleobject.jpg。Object完整路径中不能包含Bucket名称。
$object = "exampledir/exampleobject.jpg";

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

// 生成一个带图片处理参数的签名的URL，有效期是3600秒，可以直接使用浏览器访问。
$timeout = 3600;

$options = array(
    // 图片缩放，parame_value需要替换为具体的参数和值，如“p_50”表示图片等比例缩小为之前的50%
    OssClient::OSS_PROCESS => "image/resize,parame_value");

$signedUrl = $ossClient->signUrl($bucket, $object, $timeout, "GET", $options);
print("rtmp url: \n" . $signedUrl);

const OSS = require("ali-oss");

const client = new OSS({
  // yourregion填写Bucket所在地域。以华东1（杭州）为例，Region填写为oss-cn-hangzhou。
  region: "oss-cn-hangzhou",
  // 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
  accessKeyId: process.env.OSS_ACCESS_KEY_ID,
  accessKeySecret: process.env.OSS_ACCESS_KEY_SECRET,
  authorizationV4: true,
  // yourbucketname填写存储空间名称。
  bucket: "examplebucket",
});
// 图片缩放 parame_value需要替换为具体的参数和值，如“p_50”表示图片等比例缩小为之前的50%
const signUrl = client.signatureUrl("example.png", {
  expires: 3600,
  process: "image/resize,parame_value",
});
console.log("signUrl=" + signUrl);