As you can see from the “binary” data it is actually an ASCII request:
0x47 0x45 0x54 0x20 0x2f 0x70 0x6f 0x6f 0x6c 0x73 0x2f 0x64 0x65 0x66 0x61 0x75 0x6c 0x74 0x2f 0x62 0x73 0x2f 0x64 0x65 -> GET /pools/default/bs/de
To reproduce this, just add the php_couchbase.dll in the PHP extension folder and libcouchbase.dll in the php.exe folder, then try a simple request:
$c=new CouchbaseCluster();
$b=$c->openBucket(); //here starts the above request
$b->set(‘key’,‘value’);