SendGrid - Curl php external file attachment broken - php

Question

I'm using SendGrid for a customer project with curl method.
All works fine but the(ir) file(s) attached on my email sending with SendGrid are broken.
Here is my code :
$documentList = array(
"DOC1.php" => "http://www.customerdomain.com/my/path/where/my/attachment/file/is/myfile.pdf"
);
$params = array(
'api_user' => $user;
'api_key' => $pass,
'x-smtpapi' => json_encode($json_string),
'from' => $from,
'to' => $to,
'subject' => $subject,
'html' => $mailHtml,
'text' => $mailText
);
if(count($documentList)>0){
foreach($documentList as $fileName=>$documentPath){
$params['files['.$fileName.']'] = $documentPath;
}
}
$request = $url.'api/mail.send.json';
// Generate curl request
$session = curl_init($request);
// Tell curl to use HTTP POST
curl_setopt ($session, CURLOPT_POST, true);
// Tell curl that this is the body of the POST
curl_setopt ($session, CURLOPT_POSTFIELDS, $params);
// Tell curl not to return headers, but do return the response
curl_setopt($session, CURLOPT_HEADER, false);
curl_setopt($session, CURLOPT_RETURNTRANSFER, true);
// obtain response
$response = curl_exec($session);
curl_close($session);
When I don't have extension file on my key of array, I've a text file containing the related value.
I think I'm not alone to have this problem, well, if you've any idea to solve this problem, thanks for your help !

Answer 1

The issue you're experiencing is because you are giving SendGrid a URL for file, rather than the file itself, and SendGrid's API needs the file.
To get your code to work, simply change the $documentList variable to:
$documentList = array(
"DOC1.pdf" => "#" . realpath("/path/where/my/attachment/file/is/myfile.pdf")
);
Instructions on this kind of file upload can be found in this StackOverflow Question, but you might otherwise want to use curl_file_create, to do this.
However, perhaps the best/easiest way to do this is to use SendGrid's PHP Library which makes sending attachments, trivially simple.:
require("path/to/sendgrid-php/sendgrid-php.php");
$sendgrid = new SendGrid('username', 'password');
$email = new SendGrid\Email();
$email->addTo('foo#bar.com')->
setFrom('me#bar.com')->
setSubject('Subject goes here')->
setText('Hello World!')->
setHtml('<strong>Hello World!</strong>')
addAttachment("../path/to/file.txt");
$sendgrid->send($email);

Answer 2

My initial issue was because the path is an autogenerated link and that's why I didn't use an url than realpath.
Anyway, I changed my code and I use now the realpath with mimetype mentioned after the file realpath (and # before).
It seems work fine now.
I'll like to thank you for your help.
Regards