initial middleware refactor

pkg/clientid/client_id.go

@@ -0,0 +1,23 @@
+// Copyright 2016 The Chihaya Authors. All rights reserved.
+// Use of this source code is governed by the BSD 2-Clause license,
+// which can be found in the LICENSE file.
+
+// Package clientid implements the parsing of BitTorrent ClientIDs from
+// BitTorrent PeerIDs.
+package clientid
+
+// New returns the part of a PeerID that identifies a peer's client software.
+func New(peerID string) (clientID string) {
+	length := len(peerID)
+	if length >= 6 {
+		if peerID[0] == '-' {
+			if length >= 7 {
+				clientID = peerID[1:7]
+			}
+		} else {
+			clientID = peerID[:6]
+		}
+	}
+
+	return
+}

pkg/clientid/client_id_test.go

@@ -0,0 +1,62 @@
+// Copyright 2016 The Chihaya Authors. All rights reserved.
+// Use of this source code is governed by the BSD 2-Clause license,
+// which can be found in the LICENSE file.
+
+package clientid
+
+import "testing"
+
+func TestClientID(t *testing.T) {
+	var clientTable = []struct {
+		peerID   string
+		clientID string
+	}{
+		{"-AZ3034-6wfG2wk6wWLc", "AZ3034"},
+		{"-AZ3042-6ozMq5q6Q3NX", "AZ3042"},
+		{"-BS5820-oy4La2MWGEFj", "BS5820"},
+		{"-AR6360-6oZyyMWoOOBe", "AR6360"},
+		{"-AG2083-s1hiF8vGAAg0", "AG2083"},
+		{"-AG3003-lEl2Mm4NEO4n", "AG3003"},
+		{"-MR1100-00HS~T7*65rm", "MR1100"},
+		{"-LK0140-ATIV~nbEQAMr", "LK0140"},
+		{"-KT2210-347143496631", "KT2210"},
+		{"-TR0960-6ep6svaa61r4", "TR0960"},
+		{"-XX1150-dv220cotgj4d", "XX1150"},
+		{"-AZ2504-192gwethivju", "AZ2504"},
+		{"-KT4310-3L4UvarKuqIu", "KT4310"},
+		{"-AZ2060-0xJQ02d4309O", "AZ2060"},
+		{"-BD0300-2nkdf08Jd890", "BD0300"},
+		{"-A~0010-a9mn9DFkj39J", "A~0010"},
+		{"-UT2300-MNu93JKnm930", "UT2300"},
+		{"-UT2300-KT4310KT4301", "UT2300"},
+
+		{"T03A0----f089kjsdf6e", "T03A0-"},
+		{"S58B-----nKl34GoNb75", "S58B--"},
+		{"M4-4-0--9aa757Efd5Bl", "M4-4-0"},
+
+		{"AZ2500BTeYUzyabAfo6U", "AZ2500"}, // BitTyrant
+		{"exbc0JdSklm834kj9Udf", "exbc0J"}, // Old BitComet
+		{"FUTB0L84j542mVc84jkd", "FUTB0L"}, // Alt BitComet
+		{"XBT054d-8602Jn83NnF9", "XBT054"}, // XBT
+		{"OP1011affbecbfabeefb", "OP1011"}, // Opera
+		{"-ML2.7.2-kgjjfkd9762", "ML2.7."}, // MLDonkey
+		{"-BOWA0C-SDLFJWEIORNM", "BOWA0C"}, // Bits on Wheels
+		{"Q1-0-0--dsn34DFn9083", "Q1-0-0"}, // Queen Bee
+		{"Q1-10-0-Yoiumn39BDfO", "Q1-10-"}, // Queen Bee Alt
+		{"346------SDFknl33408", "346---"}, // TorreTopia
+		{"QVOD0054ABFFEDCCDEDB", "QVOD00"}, // Qvod
+
+		{"", ""},
+		{"-", ""},
+		{"12345", ""},
+		{"-12345", ""},
+		{"123456", "123456"},
+		{"-123456", "123456"},
+	}
+
+	for _, tt := range clientTable {
+		if parsedID := New(tt.peerID); parsedID != tt.clientID {
+			t.Error("Incorrectly parsed peer ID", tt.peerID, "as", parsedID)
+		}
+	}
+}