mirror of
https://github.com/Luzifer/nginx-sso.git
synced 2024-12-25 07:11:17 +00:00
331 lines
9 KiB
Go
331 lines
9 KiB
Go
/*
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*
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* Copyright 2017 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package naming
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import (
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"context"
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"fmt"
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"net"
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"reflect"
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"sync"
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"testing"
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"time"
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)
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func newUpdateWithMD(op Operation, addr, lb string) *Update {
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return &Update{
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Op: op,
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Addr: addr,
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Metadata: AddrMetadataGRPCLB{AddrType: GRPCLB, ServerName: lb},
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}
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}
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func toMap(u []*Update) map[string]*Update {
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m := make(map[string]*Update)
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for _, v := range u {
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m[v.Addr] = v
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}
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return m
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}
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func TestCompileUpdate(t *testing.T) {
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tests := []struct {
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oldAddrs []string
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newAddrs []string
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want []*Update
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}{
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{
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[]string{},
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[]string{"1.0.0.1"},
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[]*Update{{Op: Add, Addr: "1.0.0.1"}},
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},
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{
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[]string{"1.0.0.1"},
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[]string{"1.0.0.1"},
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[]*Update{},
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},
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{
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[]string{"1.0.0.0"},
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[]string{"1.0.0.1"},
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[]*Update{{Op: Delete, Addr: "1.0.0.0"}, {Op: Add, Addr: "1.0.0.1"}},
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},
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{
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[]string{"1.0.0.1"},
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[]string{"1.0.0.0"},
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[]*Update{{Op: Add, Addr: "1.0.0.0"}, {Op: Delete, Addr: "1.0.0.1"}},
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},
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{
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[]string{"1.0.0.1"},
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[]string{"1.0.0.1", "1.0.0.2", "1.0.0.3"},
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[]*Update{{Op: Add, Addr: "1.0.0.2"}, {Op: Add, Addr: "1.0.0.3"}},
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},
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{
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[]string{"1.0.0.1", "1.0.0.2", "1.0.0.3"},
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[]string{"1.0.0.0"},
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[]*Update{{Op: Add, Addr: "1.0.0.0"}, {Op: Delete, Addr: "1.0.0.1"}, {Op: Delete, Addr: "1.0.0.2"}, {Op: Delete, Addr: "1.0.0.3"}},
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},
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{
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[]string{"1.0.0.1", "1.0.0.3", "1.0.0.5"},
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[]string{"1.0.0.2", "1.0.0.3", "1.0.0.6"},
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[]*Update{{Op: Delete, Addr: "1.0.0.1"}, {Op: Add, Addr: "1.0.0.2"}, {Op: Delete, Addr: "1.0.0.5"}, {Op: Add, Addr: "1.0.0.6"}},
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},
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{
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[]string{"1.0.0.1", "1.0.0.1", "1.0.0.2"},
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[]string{"1.0.0.1"},
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[]*Update{{Op: Delete, Addr: "1.0.0.2"}},
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},
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}
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var w dnsWatcher
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for _, c := range tests {
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w.curAddrs = make(map[string]*Update)
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newUpdates := make(map[string]*Update)
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for _, a := range c.oldAddrs {
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w.curAddrs[a] = &Update{Addr: a}
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}
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for _, a := range c.newAddrs {
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newUpdates[a] = &Update{Addr: a}
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}
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r := w.compileUpdate(newUpdates)
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if !reflect.DeepEqual(toMap(c.want), toMap(r)) {
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t.Errorf("w(%+v).compileUpdate(%+v) = %+v, want %+v", c.oldAddrs, c.newAddrs, updatesToSlice(r), updatesToSlice(c.want))
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}
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}
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}
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func TestResolveFunc(t *testing.T) {
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tests := []struct {
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addr string
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want error
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}{
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// TODO(yuxuanli): More false cases?
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{"www.google.com", nil},
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{"foo.bar:12345", nil},
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{"127.0.0.1", nil},
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{"127.0.0.1:12345", nil},
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{"[::1]:80", nil},
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{"[2001:db8:a0b:12f0::1]:21", nil},
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{":80", nil},
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{"127.0.0...1:12345", nil},
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{"[fe80::1%lo0]:80", nil},
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{"golang.org:http", nil},
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{"[2001:db8::1]:http", nil},
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{":", nil},
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{"", errMissingAddr},
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{"[2001:db8:a0b:12f0::1", fmt.Errorf("invalid target address %v", "[2001:db8:a0b:12f0::1")},
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}
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r, err := NewDNSResolver()
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if err != nil {
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t.Errorf("%v", err)
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}
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for _, v := range tests {
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_, err := r.Resolve(v.addr)
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if !reflect.DeepEqual(err, v.want) {
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t.Errorf("Resolve(%q) = %v, want %v", v.addr, err, v.want)
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}
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}
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}
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var hostLookupTbl = map[string][]string{
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"foo.bar.com": {"1.2.3.4", "5.6.7.8"},
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"ipv4.single.fake": {"1.2.3.4"},
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"ipv4.multi.fake": {"1.2.3.4", "5.6.7.8", "9.10.11.12"},
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"ipv6.single.fake": {"2607:f8b0:400a:801::1001"},
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"ipv6.multi.fake": {"2607:f8b0:400a:801::1001", "2607:f8b0:400a:801::1002", "2607:f8b0:400a:801::1003"},
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}
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func hostLookup(host string) ([]string, error) {
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if addrs, ok := hostLookupTbl[host]; ok {
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return addrs, nil
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}
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return nil, fmt.Errorf("failed to lookup host:%s resolution in hostLookupTbl", host)
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}
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var srvLookupTbl = map[string][]*net.SRV{
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"_grpclb._tcp.srv.ipv4.single.fake": {&net.SRV{Target: "ipv4.single.fake", Port: 1234}},
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"_grpclb._tcp.srv.ipv4.multi.fake": {&net.SRV{Target: "ipv4.multi.fake", Port: 1234}},
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"_grpclb._tcp.srv.ipv6.single.fake": {&net.SRV{Target: "ipv6.single.fake", Port: 1234}},
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"_grpclb._tcp.srv.ipv6.multi.fake": {&net.SRV{Target: "ipv6.multi.fake", Port: 1234}},
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}
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func srvLookup(service, proto, name string) (string, []*net.SRV, error) {
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cname := "_" + service + "._" + proto + "." + name
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if srvs, ok := srvLookupTbl[cname]; ok {
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return cname, srvs, nil
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}
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return "", nil, fmt.Errorf("failed to lookup srv record for %s in srvLookupTbl", cname)
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}
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func updatesToSlice(updates []*Update) []Update {
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res := make([]Update, len(updates))
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for i, u := range updates {
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res[i] = *u
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}
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return res
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}
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func testResolver(t *testing.T, freq time.Duration, slp time.Duration) {
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tests := []struct {
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target string
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want []*Update
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}{
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{
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"foo.bar.com",
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[]*Update{{Op: Add, Addr: "1.2.3.4" + colonDefaultPort}, {Op: Add, Addr: "5.6.7.8" + colonDefaultPort}},
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},
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{
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"foo.bar.com:1234",
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[]*Update{{Op: Add, Addr: "1.2.3.4:1234"}, {Op: Add, Addr: "5.6.7.8:1234"}},
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},
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{
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"srv.ipv4.single.fake",
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[]*Update{newUpdateWithMD(Add, "1.2.3.4:1234", "ipv4.single.fake")},
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},
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{
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"srv.ipv4.multi.fake",
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[]*Update{
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newUpdateWithMD(Add, "1.2.3.4:1234", "ipv4.multi.fake"),
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newUpdateWithMD(Add, "5.6.7.8:1234", "ipv4.multi.fake"),
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newUpdateWithMD(Add, "9.10.11.12:1234", "ipv4.multi.fake")},
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},
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{
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"srv.ipv6.single.fake",
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[]*Update{newUpdateWithMD(Add, "[2607:f8b0:400a:801::1001]:1234", "ipv6.single.fake")},
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},
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{
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"srv.ipv6.multi.fake",
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[]*Update{
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newUpdateWithMD(Add, "[2607:f8b0:400a:801::1001]:1234", "ipv6.multi.fake"),
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newUpdateWithMD(Add, "[2607:f8b0:400a:801::1002]:1234", "ipv6.multi.fake"),
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newUpdateWithMD(Add, "[2607:f8b0:400a:801::1003]:1234", "ipv6.multi.fake"),
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},
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},
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}
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for _, a := range tests {
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r, err := NewDNSResolverWithFreq(freq)
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if err != nil {
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t.Fatalf("%v\n", err)
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}
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w, err := r.Resolve(a.target)
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if err != nil {
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t.Fatalf("%v\n", err)
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}
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updates, err := w.Next()
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if err != nil {
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t.Fatalf("%v\n", err)
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}
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if !reflect.DeepEqual(toMap(a.want), toMap(updates)) {
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t.Errorf("Resolve(%q) = %+v, want %+v\n", a.target, updatesToSlice(updates), updatesToSlice(a.want))
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}
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var wg sync.WaitGroup
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wg.Add(1)
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go func() {
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defer wg.Done()
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for {
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_, err := w.Next()
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if err != nil {
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return
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}
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t.Error("Execution shouldn't reach here, since w.Next() should be blocked until close happen.")
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}
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}()
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// Sleep for sometime to let watcher do more than one lookup
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time.Sleep(slp)
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w.Close()
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wg.Wait()
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}
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}
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func replaceNetFunc() func() {
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oldLookupHost := lookupHost
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oldLookupSRV := lookupSRV
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lookupHost = func(ctx context.Context, host string) ([]string, error) {
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return hostLookup(host)
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}
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lookupSRV = func(ctx context.Context, service, proto, name string) (string, []*net.SRV, error) {
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return srvLookup(service, proto, name)
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}
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return func() {
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lookupHost = oldLookupHost
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lookupSRV = oldLookupSRV
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}
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}
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func TestResolve(t *testing.T) {
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defer replaceNetFunc()()
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testResolver(t, time.Millisecond*5, time.Millisecond*10)
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}
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const colonDefaultPort = ":" + defaultPort
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func TestIPWatcher(t *testing.T) {
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tests := []struct {
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target string
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want []*Update
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}{
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{"127.0.0.1", []*Update{{Op: Add, Addr: "127.0.0.1" + colonDefaultPort}}},
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{"127.0.0.1:12345", []*Update{{Op: Add, Addr: "127.0.0.1:12345"}}},
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{"::1", []*Update{{Op: Add, Addr: "[::1]" + colonDefaultPort}}},
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{"[::1]:12345", []*Update{{Op: Add, Addr: "[::1]:12345"}}},
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{"[::1]:", []*Update{{Op: Add, Addr: "[::1]:443"}}},
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{"2001:db8:85a3::8a2e:370:7334", []*Update{{Op: Add, Addr: "[2001:db8:85a3::8a2e:370:7334]" + colonDefaultPort}}},
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{"[2001:db8:85a3::8a2e:370:7334]", []*Update{{Op: Add, Addr: "[2001:db8:85a3::8a2e:370:7334]" + colonDefaultPort}}},
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{"[2001:db8:85a3::8a2e:370:7334]:12345", []*Update{{Op: Add, Addr: "[2001:db8:85a3::8a2e:370:7334]:12345"}}},
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{"[2001:db8::1]:http", []*Update{{Op: Add, Addr: "[2001:db8::1]:http"}}},
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// TODO(yuxuanli): zone support?
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}
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for _, v := range tests {
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r, err := NewDNSResolverWithFreq(time.Millisecond * 5)
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if err != nil {
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t.Fatalf("%v\n", err)
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}
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w, err := r.Resolve(v.target)
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if err != nil {
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t.Fatalf("%v\n", err)
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}
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var updates []*Update
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var wg sync.WaitGroup
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wg.Add(1)
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count := 0
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go func() {
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defer wg.Done()
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for {
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u, err := w.Next()
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if err != nil {
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return
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}
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updates = u
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count++
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}
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}()
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// Sleep for sometime to let watcher do more than one lookup
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time.Sleep(time.Millisecond * 10)
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w.Close()
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wg.Wait()
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if !reflect.DeepEqual(v.want, updates) {
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t.Errorf("Resolve(%q) = %v, want %+v\n", v.target, updatesToSlice(updates), updatesToSlice(v.want))
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}
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if count != 1 {
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t.Errorf("IPWatcher Next() should return only once, not %d times\n", count)
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}
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}
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}
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