Solution : https://service.sap.com/sap/support/notes/670879 (SAP Service marketplace login required)
Key words :
sap web application server, if_http_clien~set_compression interface method, if_http_server~set_compression interface method, selecting log version http/1, if_http_client~propertytype_accept_compress interface attribute, interface attribute if_http_client~propertytype_accept_compress, http log version http/1, if_http_server~set_compression method, attribute if_http_client~propertytype_accept_compress, business server pages
Related Notes :
715598 | Global deactivation of GZIP compression for HTTP |