Attachment POST not working ERROR_AUTHENTICATION_REQUIRED - Invalid signature for signature method HMAC-SHA1

[Aman Bansal]

Hello,

I am trying to create an attachment as per the documentation https://api.immobilienscout24.de/our-apis/import-export/attachments/post.html and getting the error 

ERROR_AUTHENTICATION_REQUIRED - Invalid signature for signature method HMAC-SHA1 but when i POST all other request like contact, realestate they are working fine so why i am getting this error only for attachment post.

SIGNED URL

https://rest.sandbox-immobilienscout24.de/restapi/api/offer/v1.0/user/me/realestate/315481451/attachment/?oauth_consumer_key=khanakiaKey&oauth_nonce=7MgdS&oauth_signature_method=HMAC-SHA1&oauth_timestamp=1568444269&oauth_token=99a5e176-223e-47ee-8792-2ab62cb6caa1&oauth_version=1.0&oauth_signature=idjd LwvOAvvjgCMlLp2fJcjEdU=

REQUEST HEADER

$sMimeBoundary = md5(time());

curl_setopt($ch, CURLOPT_HTTPHEADER, array(

    'Content-Type'=>'multipart/form-data; boundary="'.$sMimeBoundary.'"',

    'Accept-Encoding' => 'gzip,deflate',

));

REQUEST BODY

--f8e5a8edc4b990a9e9bf13e02eaea616

Content-Type: application/xml; name=body.xml

Content-Transfer-Encoding: binary

Content-Disposition: form-data; name="metadata"; filename="body.xml"

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>

<common:attachment xsi:type="common:Picture" xmlns:common="http://rest.immobilienscout24.de/schema/common/1.0" xmlns:ns3="http://rest.immobilienscout24.de/schema/platform/gis/1.0" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

<title></title>

<externalId>extID6</externalId>

<externalCheckSum></externalCheckSum>

<floorplan></floorplan>

<titlePicture></titlePicture>

</common:attachment>

--f8e5a8edc4b990a9e9bf13e02eaea616

Content-Type: image/jpeg; name=test.jpeg

Content-Transfer-Encoding: binary

Content-Disposition: form-data; name="attachment"; filename="test.jpeg"

 ���6wK���7zko�u,6 �� _�m�a�3Ǩ͖z�X�1�Ӓ�l�߀^jah��C�B����oݱesy �*B#�� ��� c��A&�����ߡ ���!���� Z}�4���w�6�*�����0A3ặ��� ����"�lp�K � ��>���Z��~b�u 5ı�1��pi� �[���Ur�Y� ;i�b w��ׯnn�\ -nƊX �`{mu�s~��}�W��<2�bU�Z6�cv�;�ml���{�gM��}�e��e�P�]c ���۽� �

c�]5� {���� ��kwӶ���� \� � �������� ................................

--f8e5a8edc4b990a9e9bf13e02eaea616--

[Olaf Lindenau]

Hi Aman,

I've got your mail you has sent to us and will answer it.

Best,

Olaf