How to send an email with attachments using an SDK

# -*- coding: utf-8 -*-
import sys
from typing import List
from typing import BinaryIO
from alibabacloud_dm20151123.client import Client as Dm20151123Client
from alibabacloud_tea_openapi import models as open_api_models
from alibabacloud_dm20151123 import models as dm_20151123_models
from alibabacloud_tea_util import models as util_models
from alibabacloud_dm20151123 import models as main_models

attachments = []


class Sample:
    def __init__(self) -> None:
        pass

    @staticmethod
    def create_client() -> Dm20151123Client:
        """
        Initializes a client with credentials.
        @return: Client
        @throws Exception
        """
        # For production code, we recommend using a more secure method that does not require an AccessKey pair. For more information about credential configuration, see https://help.aliyun.com/document_detail/378659.html.
        config = open_api_models.Config(
            access_key_id='xxxxxx',
            access_key_secret='xxxxxx'
        )
        # For more information about endpoints, see https://api.aliyun.com/product/Dm
        config.endpoint = f'dm.aliyuncs.com'
        config.region_id = f'cn-hangzhou'
        return Dm20151123Client(config)

    @staticmethod
    def main(
            args: List[str],
    ) -> None:
        client = Sample.create_client()
        single_sendmail_request = dm_20151123_models.SingleSendMailAdvanceRequest(
            account_name='sender@example.com',
            address_type='1',
            reply_to_address='true',
            to_address='recipient@example.com',
            subject='Subject',
            html_body='Email body',
            attachments=getAttachments()
        )
        try:
            # When you copy the code to run, print the API return value.
            response = client.single_send_mail_advance(single_sendmail_request, util_models.RuntimeOptions())
            print(response)
        except Exception as error:
            # This is for demonstration purposes only. Handle exceptions with care. Do not ignore exceptions in your project.
            # Error message
            print(error.data)
            # # Diagnosis address
            # print(error.data.get("Recommend"))
            # UtilClient.assert_as_string(error.message)

def getAttachments() -> List[main_models.SingleSendMailAdvanceRequestAttachments]:
    attach = main_models.SingleSendMailAdvanceRequestAttachments("test1.txt", getFile(r"C:\Users\Downloads\111.txt"))
    attach1 = main_models.SingleSendMailAdvanceRequestAttachments("test2.txt", getFile(r"C:\Users\Downloads\222.txt"))
    attachments.append(attach)
    attachments.append(attach1)
    return attachments


def getFile(v_file) -> BinaryIO:
    f = open(v_file, 'rb')
    return f


if __name__ == '__main__':
    Sample.main(sys.argv[1:])

package org.example;

import com.aliyun.dm20151123.models.SingleSendMailAdvanceRequest;
import com.aliyun.dm20151123.models.SingleSendMailResponse;
import com.aliyun.tea.TeaException;
import com.google.gson.Gson;

import java.io.File;
import java.io.FileInputStream;
import java.util.ArrayList;
import java.util.List;

public class Sample {
    /**
     * description :
     * <p>Initializes a client with credentials.</p>
     * @return Client
     *
     * @throws Exception
     */
    public static com.aliyun.dm20151123.Client createClient() throws Exception {
        // For production code, we recommend using a more secure method that does not require an AccessKey pair. For more information about credential configuration, see https://help.aliyun.com/document_detail/378657.html.
//        com.aliyun.credentials.Client credential = new com.aliyun.credentials.Client();
        com.aliyun.teaopenapi.models.Config config = new com.aliyun.teaopenapi.models.Config()
                .setAccessKeyId("xxxxxx")
                .setAccessKeySecret("xxxxxx");
        // For more information about endpoints, see https://api.aliyun.com/product/Dm
        config.endpoint = "dm.aliyuncs.com";
        config.regionId = "cn-hangzhou";
        return new com.aliyun.dm20151123.Client(config);
    }
    private static final Gson gson = new Gson(); // Add a Gson instance
    public static void main(String[] args_) throws Exception {


        com.aliyun.dm20151123.Client client = Sample.createClient();
        SingleSendMailAdvanceRequest singleSendMailAdvanceRequest = new SingleSendMailAdvanceRequest();
        List<SingleSendMailAdvanceRequest.SingleSendMailAdvanceRequestAttachments> attachments = new ArrayList<>();
        SingleSendMailAdvanceRequest.SingleSendMailAdvanceRequestAttachments attachment1 = new SingleSendMailAdvanceRequest.SingleSendMailAdvanceRequestAttachments();
        attachment1.setAttachmentName("test1.txt");
        attachment1.setAttachmentUrlObject(new FileInputStream(new File("C:\\Users\\Downloads\\111.txt")));


        SingleSendMailAdvanceRequest.SingleSendMailAdvanceRequestAttachments attachment2 = new SingleSendMailAdvanceRequest.SingleSendMailAdvanceRequestAttachments();
        attachment2.setAttachmentName("test2.txt");
        attachment2.setAttachmentUrlObject(new FileInputStream(new File("C:\\Users\\Downloads\\222.txt")));
        attachments.add(attachment1);
        attachments.add(attachment2);
        singleSendMailAdvanceRequest.setAttachments(attachments);

        singleSendMailAdvanceRequest.setAccountName("sender@example.com");
        singleSendMailAdvanceRequest.setAddressType(1);
        singleSendMailAdvanceRequest.setReplyToAddress(true);
        singleSendMailAdvanceRequest.setToAddress("recipient@example.com");
        singleSendMailAdvanceRequest.setSubject("Subject");
        singleSendMailAdvanceRequest.setHtmlBody("Email body");
        singleSendMailAdvanceRequest.setClickTrace("1");


        try {
            // When you copy the code to run, print the API return value.
            SingleSendMailResponse response =  client.singleSendMailAdvance(singleSendMailAdvanceRequest, new com.aliyun.teautil.models.RuntimeOptions());

            System.out.println(gson.toJson(response));
        } catch (TeaException error) {
            // This is for demonstration purposes only. Handle exceptions with care. Do not ignore exceptions in your project.
            // Error message
            System.out.println(error.getMessage());
            // Diagnosis address
            System.out.println(error.getData().get("Recommend"));
            com.aliyun.teautil.Common.assertAsString(error.message);
        } catch (Exception _error) {
            TeaException error = new TeaException(_error.getMessage(), _error);
            // This is for demonstration purposes only. Handle exceptions with care. Do not ignore exceptions in your project.
            // Error message
            System.out.println(error.getMessage());
            // Diagnosis address
            System.out.println(error.getData().get("Recommend"));
            com.aliyun.teautil.Common.assertAsString(error.message);
        }
    }
}

<?php

// This file is auto-generated, don't edit it. Thanks.
namespace AlibabaCloud\SDK\Sample;

use AlibabaCloud\SDK\Dm\V20151123\Dm;
// use AlibabaCloud\Credentials\Credential;
use \Exception;
use AlibabaCloud\Tea\Exception\TeaError;
use AlibabaCloud\Tea\Utils\Utils;

use Darabonba\OpenApi\Models\Config;
use AlibabaCloud\SDK\Dm\V20151123\Models\SingleSendMailAdvanceRequest;
use AlibabaCloud\SDK\Dm\V20151123\Models\SingleSendMailAdvanceRequest\attachments;
use GuzzleHttp\Psr7\Stream;
use AlibabaCloud\Tea\Utils\Utils\RuntimeOptions;

require_once __DIR__ . '\\..\\..\\vendor\\autoload.php';

class Sample {

    /**
     * Initializes a client with credentials.
     * @return Dm Client
     */
    public static function createClient(){
        // For production code, we recommend using a more secure method that does not require an AccessKey pair. For more information about credential configuration, see https://help.aliyun.com/document_detail/311677.html.
        $config = new Config([
            "accessKeyId" => "xxxxxx",
            "accessKeySecret" => "xxxxxxx"
        ]);
        // For more information about endpoints, see https://api.aliyun.com/product/Dm
        $config->endpoint = "dm.aliyuncs.com";        
        $config->regionId = "cn-hangzhou";        
        return new Dm($config);
    }
    // public static function createClient(){
    //     // For production code, we recommend using a more secure method that does not require an AccessKey pair. For more information about credential configuration, see https://help.aliyun.com/document_detail/311677.html.
    //     $credential = new Credential();
    //     $config = new Config([
    //         "credential" => $credential
    //     ]);
    //     // For more information about endpoints, see https://api.aliyun.com/product/Dm
    //     $config->endpoint = "dm.aliyuncs.com";
    //     $config->regionId = "cn-hangzhou";
    //     return new Dm($config);
    // }
    /**
     * Gets the file stream.
     * @param string $filePath File path
     * @return Stream
     */
    public static function getFile($filePath) {
        $fileResource = fopen($filePath, 'rb');
        $fileSize = filesize($filePath); // Get the file size
        var_dump("File size:");
        var_dump($fileSize);
        return new Stream($fileResource);
    }

    /**
     * Gets the attachment list.
     * @return array
     */
    public static function getAttachments() {
        $attachments = [];
        
        // Create the first attachment
        $attachment1 = new attachments();
        $attachment1->attachmentName = "test1.txt";
        $attachment1->attachmentUrlObject = self::getFile("C:\\Users\\Downloads\\111.txt");
        $attachments[] = $attachment1;
        
        // Create the second attachment
        $attachment2 = new attachments();
        $attachment2->attachmentName = "test2.txt";
        $attachment2->attachmentUrlObject = self::getFile("C:\\Users\\Downloads\\222.txt");
        $attachments[] = $attachment2;
        //print $attachments;
        var_dump($attachments);
        return $attachments;
    }

    /**
     * @param string[] $args
     * @return void
     */
    public static function main($args){
        $client = self::createClient();
        
        // Create the email request
        $singleSendMailRequest = new SingleSendMailAdvanceRequest([
            "accountName" => "sender@example.com",
            "addressType" => 1,
            "replyToAddress" => true,
            "subject" => "Subject",
            "toAddress" => "recipient@example.com",            
            "attachments" => self::getAttachments(),
            "htmlBody" => "<h1>Content</h1>",
            "textBody" => "Content"
        ]);
        
        // // Create runtime options
        // $runtime = new RuntimeOptions([
        //     "ca" => "C:\\Users\\cacert.pem" // Specify the local CA certificate path
        // ]);
        $runtime = new RuntimeOptions();
        
        try {
            // Send the email
            $client->singleSendMailAdvance($singleSendMailRequest, $runtime);
            var_dump("Sent successfully");
        }
        catch (Exception $error) {
            if (!($error instanceof TeaError)) {
                $error = new TeaError([], $error->getMessage(), $error->getCode(), $error);
            }
            // This is for demonstration purposes only. Handle exceptions with care. Do not ignore exceptions in your project.
            // Error message
            var_dump($error->message);
            // Diagnosis address
            var_dump($error->data["Recommend"]);
            Utils::assertAsString($error->message);
        }
    }
}
$path = __DIR__ . \DIRECTORY_SEPARATOR . '..' . \DIRECTORY_SEPARATOR . 'vendor' . \DIRECTORY_SEPARATOR . 'autoload.php';
if (file_exists($path)) {
    require_once $path;
}
Sample::main(array_slice($argv, 1));

package main

import (
	"fmt"
	"os"

	openapiutil "github.com/alibabacloud-go/darabonba-openapi/v2/utils"
	dm "github.com/alibabacloud-go/dm-20151123/v2/client"
	"github.com/alibabacloud-go/tea/dara"
	"github.com/aliyun/credentials-go/credentials"
)

// Description:
//
// Initializes a client with credentials.
//
// @return Client
//
// @throws Exception
func CreateClient() (_result *dm.Client, _err error) {
	config := new(credentials.Config).
		SetType("access_key").
		SetAccessKeyId("xxxxxx").
		SetAccessKeySecret("xxxxxx")

	akCredential, err := credentials.NewCredential(config)
	if err != nil {
		return _result, err
	}

	openapiConfig := &openapiutil.Config{
		Credential: akCredential,
	}
	// For more information about endpoints, see https://api.aliyun.com/product/Dm
	openapiConfig.Endpoint = dara.String("dm.aliyuncs.com")
	_result, _err = dm.NewClient(openapiConfig)
	return _result, _err
}

func main() {
	err := _main(dara.StringSlice(os.Args[1:]))
	if err != nil {
		panic(err)
	}
}

func _main(args []*string) (_err error) {
	client, _err := CreateClient()
	if _err != nil {
		return _err
	}

	// Create attachments
	attachments, _err := getAttachments()
	if _err != nil {
		return _err
	}

	// Use SingleSendMailAdvanceRequest instead of SingleSendMailRequest
	singleSendMailRequest := &dm.SingleSendMailAdvanceRequest{
		AccountName:    dara.String("sender@example.com"),
		AddressType:    dara.Int32(1),
		ReplyToAddress: dara.Bool(true),
		ToAddress:      dara.String("recipient@example.com"),
		Subject:        dara.String("Subject"),
		HtmlBody:       dara.String("Email body"),
		Attachments:    attachments,
	}

	runtime := &dara.RuntimeOptions{}
	// Use the SingleSendMailAdvance method instead of SingleSendMailWithOptions
	resp, _err := client.SingleSendMailAdvance(singleSendMailRequest, runtime)
	if _err != nil {
		fmt.Printf("[ERROR] %s\n", _err.Error())
		return _err
	}

	fmt.Printf("[LOG] %s\n", dara.Stringify(resp))
	return _err
}

// getAttachments gets the attachment list
func getAttachments() ([]*dm.SingleSendMailAdvanceRequestAttachments, error) {
	// Note: You need to change the file path to your actual file path.
	attach1, err := createAttachmentFromFile("test1.txt", `C:\Users\Downloads\111.txt`)
	if err != nil {
		return nil, fmt.Errorf("Failed to create attachment test1.txt: %v", err)
	}

	attach2, err := createAttachmentFromFile("test2.txt", `C:\Users\Downloads\222.txt`)
	if err != nil {
		return nil, fmt.Errorf("Failed to create attachment test2.txt: %v", err)
	}

	return []*dm.SingleSendMailAdvanceRequestAttachments{attach1, attach2}, nil
}

// createAttachmentFromFile creates an attachment from a file
func createAttachmentFromFile(name, filePath string) (*dm.SingleSendMailAdvanceRequestAttachments, error) {
	// Open the file
	file, err := os.Open(filePath)
	if err != nil {
		return nil, fmt.Errorf("Cannot open file %s: %v", filePath, err)
	}

	// Get file information
	fileInfo, err := file.Stat()
	if err != nil {
		file.Close()
		return nil, fmt.Errorf("Cannot get file information for %s: %v", filePath, err)
	}

	// Check the file size
	// if fileInfo.Size() > 15*1024*1024 {
	// 	file.Close()
	// 	return nil, fmt.Errorf("File %s exceeds the size limit", filePath)
	// }

	// Create an attachment object and use the file as an io.Reader
	attachment := &dm.SingleSendMailAdvanceRequestAttachments{
		AttachmentName:      dara.String(name),
		AttachmentUrlObject: file, // Use the file directly as an io.Reader
	}

	fmt.Printf("Successfully created attachment %s, size: %d bytes\n", name, fileInfo.Size())

	// Note: In a real application, you may need to keep the file open until the sending is complete
	// or read the file content into memory to avoid file handle issues

	return attachment, nil
}