CODEWITHSUNDEEP
phpgoogle-app-enginecurlmailgun
ObiHill
ObiHill

Reputation: 11876

Using PHP Curl and Mailgun API to send mail with attachment using remote file

I'm using the Google App Engine (GAE) for PHP, and I'm trying to use the Mailgun API to send a message with an attachment using CURL.

The attachment is on Google Cloud Storage (because there are limitations on GAE for writing and reading files on a local filesystem). So what I'm doing is using a temporary file instead.

Here's my code so far:

$url_str = 'https://api.mailgun.net/v3/es.restive.io/messages';
$auth_user_str = 'api';
$auth_pass_str = 'key-my-unique-key';
$post_data_arr = array(
    'from' => 'Sender <[email protected]>',
    'to' => '[email protected]',
    'subject' => 'Test Mail from GAE',
    'html' => '<html><body><strong><p>a simple HTML message from GAE</p></strong></body></html>',
    'o:tracking' => 'yes'
);
$headers_arr = array("Content-Type:multipart/form-data");
$file_gs_str = 'gs://my_bucket/attachment.pdf';

$tmp_path = tempnam(sys_get_temp_dir(), '');
$handle = fopen($tmp_path, "w");
fwrite($handle, file_get_contents($file_gs_str));
fseek($handle, 0);

$post_data_arr['attachment'] = curl_file_create($tmp_path, 'application/pdf', 'proposal.pdf');

$cl = curl_init();
curl_setopt($cl, CURLOPT_URL, $url_str);
curl_setopt($cl, CURLOPT_TIMEOUT, 30);
curl_setopt($cl, CURLOPT_HTTPHEADER, $headers_arr);
curl_setopt($cl, CURLOPT_POST, true);
curl_setopt($cl, CURLOPT_POSTFIELDS, $post_data_arr);
curl_setopt($cl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($cl, CURLOPT_USERPWD, "$auth_user_str:$auth_pass_str");

$status_code = curl_getinfo($cl);
$response = curl_exec($cl);

fclose($handle);
curl_close($cl);

For some reason, it doesn't work.

I've made sure the temp file is actually generated by putting it back into google cloud storage using this code:

$options = ['gs' => ['Content-Type' => 'application/pdf']];
$ctx = stream_context_create($options);
file_put_contents('gs://my_bucket/re_attachment.pdf', file_get_contents($tmp_path), 0, $ctx);

When I run the above I'm simply taking the temporary file and uploading it back to Google Cloud Storage using a different name, and then I download it and open it to make sure it's the same as the original. No issues here.

Unfortunately, I can't seem to get CURL to work with it. When I comment out $post_data_arr['attachment'] = curl_file_create($tmp_path, 'application/pdf', 'proposal.pdf');, the message is sent, albeit with no attachment.

How can I get this to work?

Upvotes: 1

Views: 2707

Answers (1)

bart
bart

Reputation: 15298

First, make sure you run PHP 5.5, because curl_file_create() is only supported from PHP 5.5.

Then, try to get rid of setting headers explicitly. When the value of CURLOPT_POSTFIELDS is an array, then Curl automatically sets a header for multipart/form-data. So, get rid of this:

curl_setopt($cl, CURLOPT_HTTPHEADER, $headers_arr);

Upvotes: 1

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