Need help on rewrite iRule

e.g.

 configuration

[root@ve11c:Active:In Sync] config  tmsh list ltm virtual bar
ltm virtual bar {
    destination 172.28.24.10:80
    ip-protocol tcp
    mask 255.255.255.255
    pool foo
    profiles {
        http { }
        tcp { }
    }
    rules {
        qux
    }
    source 0.0.0.0/0
    source-address-translation {
        type automap
    }
    vs-index 8
}
[root@ve11c:Active:In Sync] config  tmsh list ltm pool foo
ltm pool foo {
    members {
        200.200.200.101:80 {
            address 200.200.200.101
        }
    }
}
[root@ve11c:Active:In Sync] config  tmsh list ltm rule qux
ltm rule qux {
    when HTTP_REQUEST {
  switch [HTTP::uri] {
    "/" -
    "/EBC" {
      HTTP::uri "/ebc"
    }
  }
}
}

 test1

[root@ve11c:Active:In Sync] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.28.24.1(39714) <-> 172.28.24.10(80)
1457237630.7187 (0.0016)  C>S
---------------------------------------------------------------
GET /EBC HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Accept: */*
Host: x.y.com

---------------------------------------------------------------

New TCP connection 2: 200.200.200.14(39714) <-> 200.200.200.101(80)
1457237630.7230 (0.0041)  C>S
---------------------------------------------------------------
GET /ebc HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Accept: */*
Host: x.y.com

---------------------------------------------------------------

 test2

[root@ve11c:Active:In Sync] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.28.24.1(39715) <-> 172.28.24.10(80)
1457237660.4237 (0.0026)  C>S
---------------------------------------------------------------
GET / HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Accept: */*
Host: x.y.com

---------------------------------------------------------------

New TCP connection 2: 200.200.200.14(39715) <-> 200.200.200.101(80)
1457237660.4253 (0.0014)  C>S
---------------------------------------------------------------
GET /ebc HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Accept: */*
Host: x.y.com

---------------------------------------------------------------