SES：在 lambda 函数中访问电子邮件正文

Question

我对 AWS 比较陌生，我正在尝试通过 Lambda 函数处理我的电子邮件。我在 node.js:

中构建了这个

'use strict';

exports.handler = (event, context, callback) => {

    var http = require('http');
    var data = JSON.stringify(event);

    var options = {
        host: 'my.host',
        port: '80',
        path: '/my/path',
        method: 'POST',
        headers: {
            'Content-Type': 'application/json; charset=utf-8',
            'Content-Length': data.length
        }
    };

    var req = http.request(options, function(res) {
        var msg = '';

        res.setEncoding('utf8');
        res.on('data', function(chunk) {
            msg += chunk;
        });
        res.on('end', function() {
            console.log(JSON.parse(msg));
        });
    });

    req.write(data);
    req.end();
};

我已经用端点进行了测试，它运行良好，问题是我现在才意识到消息的正文从未发送过。如何访问消息正文以发送它并由我的 api 处理？

如果您需要查看发送的样本，请告诉我。

Answer 1

所以我所做的是将收到的电子邮件存储在 S3 存储桶中，而不是通知我的 api 有一封新电子邮件已到达（发送文件名）。最后从 S3 中读取，从 S3 中解析、存储和删除，在我的 api.

中

SES 规则：

Lambda 通知函数：

Note that the name of the S3 file created by the first rule is the same as the messages id, hence 'fileName': event.Records[0].ses.mail.messageId.

'use strict';

exports.handler = (event, context, callback) => {

    var http = require('http');
    var data = JSON.stringify({
        'fileName': event.Records[0].ses.mail.messageId,
    });

    var options = {
        host: 'my.host',
        port: '80',
        path: '/my/path',
        method: 'POST',
        headers: {
            'Content-Type': 'application/json; charset=utf-8',
            'Content-Length': data.length
        }
    };

    var req = http.request(options, function(res) {
        var msg = '';

        res.setEncoding('utf8');
        res.on('data', function(chunk) {
            msg += chunk;
        });
        res.on('end', function() {
            console.log(JSON.parse(msg));
            context.succeed();
        });
    });

    req.write(data);
    req.end();
};

Api 函数 (PHP - Laravel):

Note that I'm using an email parser that's based on Plancake Email Parser (link here) with some changes of my own and if needed I'll edit to show the source.

public function process_incoming_email(Request $request)
{
    $current_time = Carbon::now()->setTimezone('Brazil/East'); // ALL TIMEZONES: http://us.php.net/manual/en/timezones.others.php

    try
    {
        if ($request->has('fileName')
        {
            $file_name = $request->input('fileName');

            // GET CREDENTIALS AND AUTHENTICATE
            $credentials = CredentialProvider::env();
            $s3 = new S3Client([
                'version' => 'latest',
                'region'  => 'my-region',
                'credentials' => $credentials
            ]);

            // FECTH S3 OBJECT
            $object = $s3->GetObject(['Bucket' => 'my-bucket', 'Key' => $file_name]);
            $body = $object['Body']->getContents();

            // PARSE S3 OBJECT
            $parser = new EmailParser($body);
            $receivers = ['to' => $parser->getTo(), 'cc' => $parser->getCc()];
            $from = $parser->getFrom();
            $body_plain = $parser->getPlainBody();
            $body_html = $parser->getHTMLBody();
            $subject = $parser->getSubject();

            $error_message;

            // PROCESS EACH RECEIVER
            foreach ($receivers as $type => $type_receivers)
            {
                foreach ($type_receivers as $receiver)
                {
                    // PROCESS DOMAIN-MATCHING RECEIVERS
                    if(preg_match("/@(.*)/", $receiver['email'], $matches) && $matches[1] == self::HOST)
                    {
                        // INSERT NEW EMAIL
                        $inserted = DB::table('my-emails')->insert([
                            // ...
                        ]);
                    }
                }
            }

            // ADD ERROR LOG IF PARSER COULD NOT FIND EMAILS
            if($email_count == 0)
            {
                DB::table('my-logs')->insert(
                    ['sender' => $request->ip(), 'type' => 'error', 'content' => ($error_message = 'Could not parse received email or find a suitable user receiving email.') . ' File: ' . $file_name]
                );
            }
            // DELETE OBJECT FROM S3 IF INSERTED
            else if(count($emails) == $email_count)
            {
                $s3->deleteObject(['Bucket' => 'my-bucket', 'Key' => $file_name]);

                // RETURN SUCCESSFUL JSON RESPONSE
                return Response::json(['success' => true, 'receivedAt' => $current_time, 'message' => 'Email successfully received and processed.']);
            }
            // ADD ERROR LOG IF NOT INSERTED
            else
            {
                DB::table('my-logs')->insert(
                    ['sender' => $request->ip(), 'type' => 'error', 'content' => ($error_message = 'Inserted ' . count($emails) . ' out of ' . $email_count . ' parsed records.') . ' File: ' . $file_name]
                );
            }
        }
        else
        {
            // ERROR: NO fileName FIELD IN RESPONSE
            DB::table('my-logs')->insert(
                ['sender' => $request->ip(), 'type' => 'error', 'content' => ($error_message = 'Incorrect request input format.') . ' Input: ' . json_encode($request->all())]
            );
        }
    }
    // ERROR TREATMENT
    catch(Exception $ex)
    {
        DB::table('my-logs')->insert(
            ['sender' => $request->ip(), 'type' => 'error', 'content' => ($error_message = 'An exception occurred while processing an incoming email.') . ' Details: ' . $ex->getMessage()]
        );
    }

    // RETURN FAILURE JSON RESPONSE
    return Response::json(['success' => false, 'receivedAt' => $current_time, 'message' => $error_message]);
}

Answer 2

我有一个与另一个非常相似的解决方案，但少了一个步骤。可以设置 lambda 触发器。因此，我创建了一个存储桶 myemailbucket，并将邮件从 SES 发送到该存储桶。然后我将 lambda 函数的触发器更改为存储桶 myemailbucket.

中 s3 中的任何创建事件

SES：在 lambda 函数中访问电子邮件正文

SES: Accessing email body inside lambda function

node.js

amazon-web-services

aws-lambda

amazon-ses