Archivos adjuntos de descarga de la API de GMail de Google

Nuestro equipo de especialistas luego de ciertos días de trabajo y recopilar de información, obtuvieron la solución, queremos que te sea útil en tu proyecto.

Solución:

En primer lugar, necesitamos obtener los datos del objeto adjunto:

 $attachmentObj = $service->users_messages_attachments->get($emailAccount, $messageId, $attachmentId);
 $data = $attachmentObj->getData(); //Get data from attachment object

Luego, antes de escribir en el archivo, convierta los datos a la codificación estándar RFC 4648 base64:

 $data = strtr($data, array('-' => '+', '_' => '/'));
 $myfile = fopen("excel.xlsx", "w+");;
 fwrite($myfile, base64_decode($data));
 fclose($myfile);

¡Ahora funciona!

function getAttachment($messageId, $partId, $userId)
    
        try 
            $client = getClient();
            $gmail = new Google_Service_Gmail($client);
            $message = $gmail->users_messages->get($userId, $messageId);
            $message_payload_details = $message->getPayload()->getParts();
            $attachmentDetails = array();
            $attachmentDetails['attachmentId'] = $message_payload_details[$partId]['body']['attachmentId'];
            $attachmentDetails['headers'] = $message_payload_details[$partId]['headers'];
            $attachment = $gmail->users_messages_attachments->get($userId, $messageId, $attachmentDetails['attachmentId']);
            $attachmentDetails['data'] = $attachment->data;
            return ['status' => true, 'data' => $attachmentDetails];
         catch (Google_Service_Exception $e) 
            return ['status' => false, 'message' => $e->getMessage()];
        
    

    function base64_to_jpeg($base64_string, $content_type) 
        $find = ["_","-"]; $replace = ["/","+"];
        $base64_string = str_replace($find,$replace,$base64_string);
        $url_str = 'data:'.$content_type.','.$base64_string;
        $base64_string = "url(".$url_str.")";
        $data = explode(',', $base64_string);
        return base64_decode( $data[ 1 ] );
    

    // Get the API client and construct the service object.
    $client = getClient();
    $service = new Google_Service_Gmail($client);
    $opt_param = array();
    $opt_param['labelIds'] =  'INBOX';
    $opt_param['maxResults'] = 1;
    $messages = $service->users_messages->listUsersMessages($userId, $opt_param);

    foreach ($messages as $message_thread) 
            $message = $service->users_messages->get($userId, $message_thread['id']);
            $message_parts = $message->getPayload()->getParts();
            $files = array();
            $attachId = $message_parts[1]['body']['attachmentId'];
            $attach = $service->users_messages_attachments->get($userId, $message['id'], $attachId);
            foreach ($message_parts as $key => $value) 
                if ( isset($value->body->attachmentId) && !isset($value->body->data)) 
                  array_push($files, $value['partId']);
                
               
    

    if(isset($_GET['messageId']) && $_GET['part_id']) // This is After Clicking an Attachment
        $attachment = getAttachment($_GET['messageId'], $_GET['part_id'], $userId);
        $content_type = "";
        foreach ($attachment['data']['headers'] as $key => $value) 
            if($value->name == 'Content-Type') $content_type = $value->value; 
            header($value->name.':'.$value->value);
        
        $content_type_val = current(explode("/",$content_type));
        $media_types = ["video", "image", "application"];
        if(in_array($content_type_val, $media_types ))
            echo base64_to_jpeg($attachment['data']['data'], $content_type); // Only for Image files
         else 
          echo base64_decode($attachment['data']['data']); // Other than Image Files
        
     else  // Listing All Attachments
            if(!empty($files)) 
                foreach ($files as $key => $value) 
                    echo 'Attachment '.($key+1).'
';
                
            

    

Al final de todo puedes encontrar los informes de otros programadores, tú igualmente tienes la habilidad insertar el tuyo si te gusta.

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