Connection to Facebook via HTTPS fails

Question

Hello everyone,
I am trying to implement the Facebook API in CRM IC. To do so I followed SAP note 1832481. First, I downloaded a HTTPS certificate from facebook and uploaded it in transaction STRUST. Second, I implemented the API as described in the SAP note:
CALL METHOD cl_http_client=>create_by_url
   EXPORTING
     url           = 'https://graph.facebook.com/facebook/picture?redirect=false'
     proxy_host    = <HOST>
     proxy_service = <PORT>
     ssl_id        = 'ANONYM'
   IMPORTING
     client        = lr_client.
CALL METHOD lr_client->request->set_method( 'GET' ).
CALL METHOD lr_client->send.
I am not sure, if I have to use the HTTP or HTTPS port. So I tried both. Nevertheless, in both cases the HTTP(S) connection fails.
ICM logging, while using our HTTP port:
[Thr 6372] *** ERROR => illegal path specified {000c0fc9} [http_plg.c 4815]
[Thr 6380] *** ERROR => IcmConnInitClientSSL: Proxy connection to graph.facebook.com:443 failed (400:Bad Request) {00090fc8} [icxxco
ICM logging, while using our HTTP port:
[Thr 6360] *** ERROR => IcmConnInitServerSSL: SapSSLSessionStart returned (-25): SSSLERR_NO_SSL3_REQUEST [icxxconn.c   1730]
[Thr 6352] *** ERROR => IcmConnProxyHandshake: proxy read(5000) failed(rc=-6) [icxxioutil.c 230]
[Thr 6352] *** ERROR => IcmConnInitClientSSL: Proxy connection to graph.facebook.com:443 failed (0:) {00090fdf} [icxxconn.c 1834]
I thought that using SSL implies HTTPS?
Can anyone help? Thanks in advance!

Answer 1

The mentioned note says about the SSSLERR_NO_SSL3_REQUEST:
Reason:An external client (for example, a Web browser) attempts to open an unsecured connection (HTTP), even though the ICM port is secured by SSL.
Solution:Configure the external client so that it sets up secure connections (HTTPS) for the ICM. When you do this, take note of the configuration options in the user guide of the provider of the client you are using.
But how can I cofigure the external client? I mean, I have no influence on facebook, have I?