在 Laravel 4.2 中覆盖 Mail MailgunTransport 类答案

【问题标题】：Override Mail MailgunTransport class in Laravel 4.2在 Laravel 4.2 中覆盖 Mail MailgunTransport 类
【发布时间】：2017-02-11 16:06:51
【问题描述】：

使用 mailgun 作为邮件驱动程序我面临的问题是密件抄送无法正常工作，因为它向所有收件人显示所有地址。我找到了一个可以解决问题的修复程序，但它需要在 vendor/laravel/framework/src/Illuminate/Mail/Transport/MailgunTransport.php 编辑 MailgunTransport.php 文件。我不想更改供应商文件夹中的文件，因此我正在尝试扩展 MailgunTransport 类...

我创建了一个名为 app/custom/extensions 的文件夹，其中包含两个文件 CustomMailServiceProvider...

<?php namespace custom\extensions;

use Swift_Mailer;
use Illuminate\Support\ServiceProvider;
use Swift_SmtpTransport as SmtpTransport;
use Swift_MailTransport as MailTransport;
use Illuminate\Mail\Transport\LogTransport;
use custom\extensions\CustomMailgunTransport;
use Illuminate\Mail\Transport\MandrillTransport;
use Swift_SendmailTransport as SendmailTransport;

class CustomMailServiceProvider extends \Illuminate\Mail\MailServiceProvider {

}

...和 CustomMailgunTransport.php

<?php namespace custom\extensions;

class CustomMailgunTransport extends Illuminate\Mail\Transport\MailgunTransport {
    /**
     * {@inheritdoc}
     */
    public function send(Swift_Mime_Message $message, &$failedRecipients = null)
    {        
        $client = $this->getHttpClient();
        $to = $this->getTo($message);
        $message->setBcc([]);

        $client->post($this->url, ['auth' => ['api', $this->key],
            'body' => [
                'to' => $to,
                'message' => new PostFile('message', (string) $message),
            ],
        ]);
    }
}

CustomMailServiceProvider.php 没有重新定义任何原始方法，而是将调用从原始 MailgunTransport 更改为 custom\extensions\CustomMailgunTransport。

我已经在 composer.json 类映射中加载了新文件的 app/custom/extensions 目录...

{
    ...
    "autoload": {
        "classmap": [
            ...
            "app/custom/extensions"                
        ],       
    },
    ...
}

我已经将原来的 'Illuminate\Mail\MailServiceProvider' 换成了 'custom\extensions\CustomMailServiceProvider'...

'providers' => array(
    ...
    //'Illuminate\Mail\MailServiceProvider',
    'custom\extensions\CustomMailServiceProvider',
    ...
),

但是，此时我不知道如何调用邮件功能。如果我尝试使用 Mail 门面，它会使用 MailgunTransport.php 中的原始代码

我需要创建自定义外观吗？如果是这样......我该怎么做？还是上面的代码有问题？有什么方法可以只扩展 MailgunTransport.php 而无需创建 CustomMailServiceProvider？

【问题讨论】：

标签： php laravel email laravel-4

【解决方案1】：

我通过在 CustomMailServiceProvider 中包含 registerMailgunTransport 方法并在那里引用新的 CustomMailgunTransport 解决了这个问题。

CustomMailServiceProvider

<?php namespace custom\extensions;

use Swift_Mailer;
use Illuminate\Support\ServiceProvider;
use Swift_SmtpTransport as SmtpTransport;
use Swift_MailTransport as MailTransport;
use Illuminate\Mail\Transport\LogTransport;
use custom\extensions\CustomMailgunTransport;
use Illuminate\Mail\Transport\MandrillTransport;
use Swift_SendmailTransport as SendmailTransport;

class CustomMailServiceProvider extends \Illuminate\Mail\MailServiceProvider {
/**
 * Register the Mailgun Swift Transport instance.
 *
 * @param  array  $config
 * @return void
 */
    protected function registerMailgunTransport($config)
    {
        $mailgun = $this->app['config']->get('services.mailgun', array());

        $this->app->bindShared('swift.transport', function() use ($mailgun)
        {
            return new CustomMailgunTransport($mailgun['secret'], $mailgun['domain']);
        });
    }
}

CustomMailgunTransport

<?php namespace custom\extensions;

use Swift_Transport;
use GuzzleHttp\Client;
use Swift_Mime_Message;
use GuzzleHttp\Post\PostFile;
use Swift_Events_EventListener;

class CustomMailgunTransport extends \Illuminate\Mail\Transport\MailgunTransport {
    /**
     * {@inheritdoc}
    */
    public function send(Swift_Mime_Message $message, &$failedRecipients = null)
    {        
        $client = $this->getHttpClient();
        $to = $this->getTo($message);
        $message->setBcc([]);

        $client->post($this->url, ['auth' => ['api', $this->key],
            'body' => [
                'to' => $to,
                'message' => new PostFile('message', (string) $message),
            ],
        ]);
     }
}

【讨论】：