Ok, now works all but there are errors with upload image:
https://idealjoyeros.es/api/images/products/30"
cliHttp = plugins.http.createNewHttpClient();
var postRequest = cliHttp.createPostRequest(url);
postRequest.addHeader('enctype', 'multipart/form-data');
postRequest.addHeader('method', 'POST');
postRequest.addParameter('Content-Disposition', 'form-data;name="image"');
postRequest.addParameter('Content-Type', content);
postRequest.addFile('image', tempFile);
postRequest.usePreemptiveAuthentication(true);
postRequest.forceMultipart(true);
response = postRequest.executeRequest(_sa.presta_clientes ,"a");
result = utils.stringReplace(response.getResponseBody(), "><", ">\n<");
response.getResponseBody is:
<?xml version="1.0" encoding="UTF-8"?>
<prestashop xmlns:xlink="http://www.w3.org/1999/xlink">
<errors>
<error>
<code>
<![CDATA[76]]>
</code>
<message>
<![CDATA[Please set an "image" parameter with image data for value]]>
</message>
</error>
</errors>
</prestashop>