Gmail API PHP - Request Entity Too Large Error 413

Question

I need help understanding Gmails API and how I can fix my script below. I have gone through every post on Stack and all the documentation on Gmail to try and figure out how to send an email using the api with attachments over 5 Mb.

Here is my script. This works fine if the attachments are less than 5Mb. The instant it goes over, I get the 413 error.

Request Entity Too Large Error 413

    # set up the google client...
    $client = new Google_Client();
    $client->setApplicationName("My App");
    $client->setAuthConfig($array['credentials']);
    
    # create new gmail service...
    $gmail = new \Google_Service_Gmail($client);
    
    # set the content...
    $strRawMessage = "";
    $boundary = uniqid(rand(), true);
    $subjectCharset = $charset = 'utf-8';
    $strMailContent = 'Test Message Body...';
    $strMailContent = quoted_printable_encode( $strMailContent );
    $strSubject = 'Test Message Subject...';
    
    # set up who the message is being sent to...
    $to[] = $this->encodeRecipients('You' . " <[email protected]>");
    $strRawMessage .= "To: " . implode(", ", $to) . "\r\n";
    
    # set the subject...
    $strRawMessage .= 'Subject: =?' . $subjectCharset . '?B?' . base64_encode($strSubject) . "?=\r\n";
    $strRawMessage .= 'MIME-Version: 1.0' . "\r\n";
    $strRawMessage .= 'Content-type: Multipart/Mixed; boundary="' . $boundary . '"' . "\r\n";
    
    # set the body...
    $strRawMessage .= "\r\n--{$boundary}\r\n";
    $strRawMessage .= 'Content-Type: text/html; charset=' . $charset . "\r\n";
    $strRawMessage .= 'Content-Transfer-Encoding: quoted-printable' . "\r\n\r\n";
    $strRawMessage .= $strMailContent . "\r\n";
    
    # loop over the attachments...
    $attachments[] = [
        'url'=>'https://s3-us-west-2.amazonaws.com/xyz/bugfiles/Pizigani_1367_Chart_10MB.jpg',
        'name'=>'Pizigani_1367_Chart_10MB.jpg',
        'size'=>'10Mb'
    ];
    foreach($attachments as $attachment){
    
        # get the file info...
        $url = $attachment['url'];
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_exec($ch);
        $mimeType = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
        $fileSize = curl_getinfo($ch, CURLINFO_CONTENT_LENGTH_DOWNLOAD);
        $path = parse_url($url, PHP_URL_PATH);
        $filename = substr($path, strrpos($path, '/') + 1); # $attachment['name'];
    
        # add it as an attachment to the email...
        $strRawMessage .= "\r\n--{$boundary}\r\n";
        $strRawMessage .= 'Content-Type: '. $mimeType .'; name="'. $filename .'";' . "\r\n";
        $strRawMessage .= 'Content-Description: ' . $filename . ';' . "\r\n";
        $strRawMessage .= 'Content-Disposition: attachment; filename="' . $attachment['name'] . '-' . $filename . '"; size=' . $fileSize. ';' . "\r\n";
        $strRawMessage .= 'Content-Transfer-Encoding: base64' . "\r\n\r\n";
        $strRawMessage .= chunk_split(base64_encode(file_get_contents($url)), 76, "\n") . "\r\n";
        $strRawMessage .= '--' . $boundary . "\r\n";
    }
    
    try {
    
        # Prepare the message in message/rfc822
        $mime = rtrim(strtr(base64_encode($strRawMessage), '+/', '-_'), '=');
        $msg = new \Google_Service_Gmail_Message();
        $msg->setRaw($mime);
    
        # send the message...
        $message = $gmail->users_messages->send("me", $msg);
    
        echo '<pre>';
        print_r($message);
        echo '</pre>';
        die;
    
    } catch (\Exception $e) {
        echo '<pre>';
        print_r($e->getMessage());
        echo '</pre>';
        die;
    }

What I do not understand is that in Gmails docs it says to use this url when uploading attachments.

 POST https://www.googleapis.com/upload/gmail/v1/users/userId/messages/send?uploadType=multipart

Or it says to use this URL to be more reliable...

 POST https://www.googleapis.com/upload/gmail/v1/users/userId/messages/send?uploadType=resumable

What I dont see is where I would even use that URL at all. No where in the classes (Google_Client, Google_Service_Gmail, Google_Service_Gmail_Message) is that option even available to use.

Answer 1

You have a similar error as found here in the google documentations Try using: Multipart upload: uploadType=multipart or Resumable upload: uploadType=resumable

and supposedly this is how should work

# send the message...
$message = $gmail->users_messages->send("me", $msg, ['uploadType' => 'multipart']);

if needed here the api reference link