Неожиданная ошибка 401 на Live Server, связанная с обработкой PHP Curl API

проблема

На рабочем сервере мой код (см. Ниже) выдает неожиданный 401 error, Тем не менее, он отлично работает на моем сервере разработки. Я пытался исправить производительность, вызванную неожиданным 401 error, Поскольку мой код отлично работает на сервере разработки, я не верю PHP код вызывает ошибку.

Любые советы или рекомендации будут с благодарностью!

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Код

$ch = curl_init();
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
curl_setopt($ch, CURLOPT_MAXREDIRS, 10);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_TIMEOUT, 60);
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_DIGEST);
curl_setopt($ch, CURLOPT_USERPWD, $VAR:$VAR2);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-type: application/json'));
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_USERAGENT, "|MY API V1.0|");
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-type: application/json','Content-Length: ' . strlen($POST)));
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $POST);

---

Эти curl_info ответы как на производство, так и на разработку серверов.

Производство (Низкая производительность)

CURL Информация

Array (
[url] => https://example.com/v0.1.0/token/create-token.hcw
[content_type] => text/html; charset=utf-8
[http_code] => 200
[header_size] => 685
[request_size] => 766
[filetime] => -1
[ssl_verify_result] => 18
[redirect_count] => 1
[total_time] => 20.13144
[namelookup_time] => 0.000381
[connect_time] => 0.000473
[pretransfer_time] => 0.010784
[size_upload] => 0
[size_download] => 80
[speed_download] => 3
[speed_upload] => 0
[download_content_length] => 80
[upload_content_length] => 0
[starttransfer_time] => 0.067625
[redirect_time] => 20.063809
)

Первый ответ (401)

HTTP/1.0 401 Unauthorized
Date: Mon, 04 May 2015 02:19:46 GMT
Server: Apache
WWW-Authenticate: Digest realm="MY API",qop="auth",nonce="5546d75645e7d",opaque="5c4c3e3231714690a63d174
a9cf26780"Cache-Control: max-age=0
Expires: Mon, 04 May 2015 02:19:46
GMT X-Powered-By: PleskLin
X-UA-Compatible: IE=Edge,chrome=1
Content-Length: 111
Connection: close
Content-Type: text/html; charset=utf-8

Второй ответ (200 — после 20+ секунд задержки)

HTTP/1.1 200 OK
Date: Mon, 04 May 2015 02:20:06 GMT
Server: Apache
Cache-Control: max-age=0
Expires: Mon, 04 May 2015 02:20:06 GMT
X-Powered-By: PleskLin
X-UA-Compatible: IE=Edge,chrome=1
Content-Length: 80
Connection: close
Content-Type: text/html; charset=utf-8

JSON String:

{"response":"success", "content":[{"token":"ko67atw1CFRSEdllOyeklRIMPb1ZS0a0"}]}

---

Разработка (Хорошая производительность)

CURL Информация

Array (
[url] => http://localhost/mydomain/v0.1.0/token/create-token.hcw
[content_type] => text/html; charset=utf-8
[http_code] => 200
[header_size] => 736
[request_size] => 348
[filetime] => -1
[ssl_verify_result] => 0
[redirect_count] => 1
[total_time] => 0.005946
[namelookup_time] => 8.0E-5
[connect_time] => 8.3E-5
[pretransfer_time] => 0.000133
[size_upload] => 20
[size_download] => 0
[speed_download] => 0
[speed_upload] => 3363
[download_content_length] => 0
[upload_content_length] => 20
[starttransfer_time] => 0.002765
[redirect_time] => 0.003146
)

Первый ответ (200)

HTTP/1.1 200 OK
Date: Mon, 04 May 2015 02:33:40 GMT
Server: Apache/2.2.14 (Unix) DAV/2 mod_ssl/2.2.14 OpenSSL/0.9.8l PHP/5.3.1 mod_perl/2.0.4 Perl/v5.10.1
X-Powered-By: PHP/5.3.1
Cache-Control: max-age=0
Expires: Mon, 04 May 2015 02:33:40 GMT
X-UA-Compatible: IE=Edge,chrome=1
Vary: Accept-Encoding
Content-Length: 0
Content-Type: text/html; charset=utf-8

Второй ответ (200)

HTTP/1.1 200 OK
Date: Mon, 04 May 2015 02:33:40 GMT
Server: Apache/2.2.14 (Unix) DAV/2 mod_ssl/2.2.14 OpenSSL/0.9.8l PHP/5.3.1 mod_perl/2.0.4 Perl/v5.10.1
X-Powered-By: PHP/5.3.1
Cache-Control: max-age=0
Expires: Mon, 04 May 2015 02:33:40 GMT
X-UA-Compatible: IE=Edge,chrome=1
Vary: Accept-Encoding
Content-Length: 0
Content-Type: text/html; charset=utf-8

JSON String:

{"response":"success", "content":[{"token":"ko67atw1CFRSEdllOyeklRIMPb1ZS0a0"}]}

curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-type: application/json'));