564 lines
14 KiB
Go
564 lines
14 KiB
Go
package service
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import (
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"context"
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"io"
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"net/http"
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"net/http/httptest"
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"net/http/httptrace"
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"net/textproto"
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"strings"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"github.com/traefik/traefik/v2/pkg/config/dynamic"
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"github.com/traefik/traefik/v2/pkg/config/runtime"
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"github.com/traefik/traefik/v2/pkg/server/provider"
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"github.com/traefik/traefik/v2/pkg/testhelpers"
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)
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type MockForwarder struct{}
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func (MockForwarder) ServeHTTP(http.ResponseWriter, *http.Request) {
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panic("implement me")
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}
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func TestGetLoadBalancer(t *testing.T) {
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sm := Manager{}
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testCases := []struct {
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desc string
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serviceName string
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service *dynamic.ServersLoadBalancer
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fwd http.Handler
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expectError bool
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}{
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{
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desc: "Fails when provided an invalid URL",
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serviceName: "test",
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service: &dynamic.ServersLoadBalancer{
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Servers: []dynamic.Server{
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{
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URL: ":",
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},
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},
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},
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fwd: &MockForwarder{},
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expectError: true,
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},
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{
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desc: "Succeeds when there are no servers",
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serviceName: "test",
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service: &dynamic.ServersLoadBalancer{},
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fwd: &MockForwarder{},
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expectError: false,
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},
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{
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desc: "Succeeds when sticky.cookie is set",
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serviceName: "test",
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service: &dynamic.ServersLoadBalancer{
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Sticky: &dynamic.Sticky{Cookie: &dynamic.Cookie{}},
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},
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fwd: &MockForwarder{},
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expectError: false,
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},
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}
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for _, test := range testCases {
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test := test
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t.Run(test.desc, func(t *testing.T) {
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t.Parallel()
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handler, err := sm.getLoadBalancer(context.Background(), test.serviceName, test.service, test.fwd)
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if test.expectError {
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require.Error(t, err)
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assert.Nil(t, handler)
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} else {
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require.NoError(t, err)
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assert.NotNil(t, handler)
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}
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})
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}
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}
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func TestGetLoadBalancerServiceHandler(t *testing.T) {
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sm := NewManager(nil, nil, nil, &RoundTripperManager{
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roundTrippers: map[string]http.RoundTripper{
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"default@internal": http.DefaultTransport,
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},
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})
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server1 := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("X-From", "first")
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}))
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t.Cleanup(server1.Close)
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server2 := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("X-From", "second")
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}))
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t.Cleanup(server2.Close)
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serverPassHost := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("X-From", "passhost")
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assert.Equal(t, "callme", r.Host)
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}))
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t.Cleanup(serverPassHost.Close)
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serverPassHostFalse := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("X-From", "passhostfalse")
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assert.NotEqual(t, "callme", r.Host)
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}))
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t.Cleanup(serverPassHostFalse.Close)
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hasNoUserAgent := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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assert.Empty(t, r.Header.Get("User-Agent"))
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}))
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t.Cleanup(hasNoUserAgent.Close)
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hasUserAgent := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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assert.Equal(t, "foobar", r.Header.Get("User-Agent"))
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}))
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t.Cleanup(hasUserAgent.Close)
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type ExpectedResult struct {
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StatusCode int
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XFrom string
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LoadBalanced bool
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SecureCookie bool
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HTTPOnlyCookie bool
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}
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testCases := []struct {
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desc string
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serviceName string
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service *dynamic.ServersLoadBalancer
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responseModifier func(*http.Response) error
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cookieRawValue string
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userAgent string
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expected []ExpectedResult
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}{
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{
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desc: "Load balances between the two servers",
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serviceName: "test",
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service: &dynamic.ServersLoadBalancer{
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Servers: []dynamic.Server{
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{
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URL: server1.URL,
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},
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{
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URL: server2.URL,
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},
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},
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},
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expected: []ExpectedResult{
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{
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StatusCode: http.StatusOK,
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LoadBalanced: true,
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},
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{
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StatusCode: http.StatusOK,
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LoadBalanced: true,
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},
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},
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},
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{
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desc: "StatusBadGateway when the server is not reachable",
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serviceName: "test",
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service: &dynamic.ServersLoadBalancer{
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Servers: []dynamic.Server{
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{
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URL: "http://foo",
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},
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},
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},
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expected: []ExpectedResult{
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{
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StatusCode: http.StatusBadGateway,
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},
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},
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},
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{
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desc: "ServiceUnavailable when no servers are available",
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serviceName: "test",
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service: &dynamic.ServersLoadBalancer{
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Servers: []dynamic.Server{},
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},
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expected: []ExpectedResult{
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{
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StatusCode: http.StatusServiceUnavailable,
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},
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},
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},
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{
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desc: "Always call the same server when sticky.cookie is true",
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serviceName: "test",
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service: &dynamic.ServersLoadBalancer{
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Sticky: &dynamic.Sticky{Cookie: &dynamic.Cookie{}},
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Servers: []dynamic.Server{
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{
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URL: server1.URL,
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},
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{
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URL: server2.URL,
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},
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},
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},
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expected: []ExpectedResult{
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{
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StatusCode: http.StatusOK,
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},
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{
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StatusCode: http.StatusOK,
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},
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},
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},
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{
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desc: "Sticky Cookie's options set correctly",
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serviceName: "test",
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service: &dynamic.ServersLoadBalancer{
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Sticky: &dynamic.Sticky{Cookie: &dynamic.Cookie{HTTPOnly: true, Secure: true}},
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Servers: []dynamic.Server{
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{
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URL: server1.URL,
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},
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},
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},
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expected: []ExpectedResult{
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{
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StatusCode: http.StatusOK,
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XFrom: "first",
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SecureCookie: true,
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HTTPOnlyCookie: true,
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},
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},
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},
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{
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desc: "PassHost passes the host instead of the IP",
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serviceName: "test",
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service: &dynamic.ServersLoadBalancer{
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Sticky: &dynamic.Sticky{Cookie: &dynamic.Cookie{}},
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PassHostHeader: func(v bool) *bool { return &v }(true),
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Servers: []dynamic.Server{
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{
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URL: serverPassHost.URL,
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},
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},
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},
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expected: []ExpectedResult{
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{
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StatusCode: http.StatusOK,
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XFrom: "passhost",
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},
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},
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},
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{
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desc: "PassHost doesn't pass the host instead of the IP",
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serviceName: "test",
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service: &dynamic.ServersLoadBalancer{
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PassHostHeader: Bool(false),
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Sticky: &dynamic.Sticky{Cookie: &dynamic.Cookie{}},
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Servers: []dynamic.Server{
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{
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URL: serverPassHostFalse.URL,
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},
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},
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},
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expected: []ExpectedResult{
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{
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StatusCode: http.StatusOK,
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XFrom: "passhostfalse",
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},
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},
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},
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{
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desc: "Cookie value is backward compatible",
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serviceName: "test",
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service: &dynamic.ServersLoadBalancer{
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Sticky: &dynamic.Sticky{
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Cookie: &dynamic.Cookie{},
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},
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Servers: []dynamic.Server{
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{
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URL: server1.URL,
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},
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{
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URL: server2.URL,
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},
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},
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},
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cookieRawValue: "_6f743=" + server1.URL,
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expected: []ExpectedResult{
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{
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StatusCode: http.StatusOK,
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XFrom: "first",
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},
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{
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StatusCode: http.StatusOK,
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XFrom: "first",
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},
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},
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},
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{
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desc: "No user-agent",
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serviceName: "test",
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service: &dynamic.ServersLoadBalancer{
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Servers: []dynamic.Server{
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{
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URL: hasNoUserAgent.URL,
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},
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},
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},
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expected: []ExpectedResult{
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{
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StatusCode: http.StatusOK,
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},
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},
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},
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{
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desc: "Custom user-agent",
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serviceName: "test",
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userAgent: "foobar",
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service: &dynamic.ServersLoadBalancer{
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Servers: []dynamic.Server{
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{
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URL: hasUserAgent.URL,
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},
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},
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},
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expected: []ExpectedResult{
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{
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StatusCode: http.StatusOK,
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},
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},
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},
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}
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for _, test := range testCases {
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test := test
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t.Run(test.desc, func(t *testing.T) {
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handler, err := sm.getLoadBalancerServiceHandler(context.Background(), test.serviceName, test.service)
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assert.NoError(t, err)
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assert.NotNil(t, handler)
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req := testhelpers.MustNewRequest(http.MethodGet, "http://callme", nil)
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assert.Equal(t, "", req.Header.Get("User-Agent"))
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if test.userAgent != "" {
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req.Header.Set("User-Agent", test.userAgent)
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}
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if test.cookieRawValue != "" {
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req.Header.Set("Cookie", test.cookieRawValue)
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}
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var prevXFrom string
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for _, expected := range test.expected {
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recorder := httptest.NewRecorder()
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handler.ServeHTTP(recorder, req)
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assert.Equal(t, expected.StatusCode, recorder.Code)
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if expected.XFrom != "" {
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assert.Equal(t, expected.XFrom, recorder.Header().Get("X-From"))
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}
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xFrom := recorder.Header().Get("X-From")
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if prevXFrom != "" {
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if expected.LoadBalanced {
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assert.NotEqual(t, prevXFrom, xFrom)
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} else {
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assert.Equal(t, prevXFrom, xFrom)
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}
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}
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prevXFrom = xFrom
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cookieHeader := recorder.Header().Get("Set-Cookie")
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if len(cookieHeader) > 0 {
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req.Header.Set("Cookie", cookieHeader)
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assert.Equal(t, expected.SecureCookie, strings.Contains(cookieHeader, "Secure"))
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assert.Equal(t, expected.HTTPOnlyCookie, strings.Contains(cookieHeader, "HttpOnly"))
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assert.NotContains(t, cookieHeader, "://")
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}
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}
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})
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}
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}
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// This test is an adapted version of net/http/httputil.Test1xxResponses test.
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func Test1xxResponses(t *testing.T) {
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sm := NewManager(nil, nil, nil, &RoundTripperManager{
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roundTrippers: map[string]http.RoundTripper{
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"default@internal": http.DefaultTransport,
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},
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})
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backend := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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h := w.Header()
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h.Add("Link", "</style.css>; rel=preload; as=style")
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h.Add("Link", "</script.js>; rel=preload; as=script")
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w.WriteHeader(http.StatusEarlyHints)
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h.Add("Link", "</foo.js>; rel=preload; as=script")
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w.WriteHeader(http.StatusProcessing)
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_, _ = w.Write([]byte("Hello"))
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}))
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t.Cleanup(backend.Close)
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config := &dynamic.ServersLoadBalancer{
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Servers: []dynamic.Server{
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{
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URL: backend.URL,
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},
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},
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}
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handler, err := sm.getLoadBalancerServiceHandler(context.Background(), "foobar", config)
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assert.Nil(t, err)
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frontend := httptest.NewServer(handler)
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t.Cleanup(frontend.Close)
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frontendClient := frontend.Client()
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checkLinkHeaders := func(t *testing.T, expected, got []string) {
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t.Helper()
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if len(expected) != len(got) {
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t.Errorf("Expected %d link headers; got %d", len(expected), len(got))
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}
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for i := range expected {
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if i >= len(got) {
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t.Errorf("Expected %q link header; got nothing", expected[i])
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continue
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}
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if expected[i] != got[i] {
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t.Errorf("Expected %q link header; got %q", expected[i], got[i])
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}
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}
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}
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var respCounter uint8
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trace := &httptrace.ClientTrace{
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Got1xxResponse: func(code int, header textproto.MIMEHeader) error {
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switch code {
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case http.StatusEarlyHints:
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checkLinkHeaders(t, []string{"</style.css>; rel=preload; as=style", "</script.js>; rel=preload; as=script"}, header["Link"])
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case http.StatusProcessing:
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checkLinkHeaders(t, []string{"</style.css>; rel=preload; as=style", "</script.js>; rel=preload; as=script", "</foo.js>; rel=preload; as=script"}, header["Link"])
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default:
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t.Error("Unexpected 1xx response")
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}
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respCounter++
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return nil
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},
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}
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req, _ := http.NewRequestWithContext(httptrace.WithClientTrace(context.Background(), trace), http.MethodGet, frontend.URL, nil)
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res, err := frontendClient.Do(req)
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assert.Nil(t, err)
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defer res.Body.Close()
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if respCounter != 2 {
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t.Errorf("Expected 2 1xx responses; got %d", respCounter)
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}
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checkLinkHeaders(t, []string{"</style.css>; rel=preload; as=style", "</script.js>; rel=preload; as=script", "</foo.js>; rel=preload; as=script"}, res.Header["Link"])
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body, _ := io.ReadAll(res.Body)
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if string(body) != "Hello" {
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t.Errorf("Read body %q; want Hello", body)
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}
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}
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func TestManager_Build(t *testing.T) {
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testCases := []struct {
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desc string
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serviceName string
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configs map[string]*runtime.ServiceInfo
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providerName string
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}{
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{
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desc: "Simple service name",
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serviceName: "serviceName",
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configs: map[string]*runtime.ServiceInfo{
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"serviceName": {
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Service: &dynamic.Service{
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LoadBalancer: &dynamic.ServersLoadBalancer{},
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},
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},
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},
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},
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{
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desc: "Service name with provider",
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serviceName: "serviceName@provider-1",
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configs: map[string]*runtime.ServiceInfo{
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"serviceName@provider-1": {
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Service: &dynamic.Service{
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LoadBalancer: &dynamic.ServersLoadBalancer{},
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},
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},
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},
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},
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{
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desc: "Service name with provider in context",
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serviceName: "serviceName",
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configs: map[string]*runtime.ServiceInfo{
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"serviceName@provider-1": {
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Service: &dynamic.Service{
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LoadBalancer: &dynamic.ServersLoadBalancer{},
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},
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},
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},
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providerName: "provider-1",
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},
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}
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for _, test := range testCases {
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test := test
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t.Run(test.desc, func(t *testing.T) {
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t.Parallel()
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manager := NewManager(test.configs, nil, nil, &RoundTripperManager{
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roundTrippers: map[string]http.RoundTripper{
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"default@internal": http.DefaultTransport,
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},
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})
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ctx := context.Background()
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if len(test.providerName) > 0 {
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ctx = provider.AddInContext(ctx, "foobar@"+test.providerName)
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}
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_, err := manager.BuildHTTP(ctx, test.serviceName)
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require.NoError(t, err)
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})
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}
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}
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func TestMultipleTypeOnBuildHTTP(t *testing.T) {
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services := map[string]*runtime.ServiceInfo{
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"test@file": {
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Service: &dynamic.Service{
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LoadBalancer: &dynamic.ServersLoadBalancer{},
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Weighted: &dynamic.WeightedRoundRobin{},
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},
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},
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}
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manager := NewManager(services, nil, nil, &RoundTripperManager{
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roundTrippers: map[string]http.RoundTripper{
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"default@internal": http.DefaultTransport,
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},
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})
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_, err := manager.BuildHTTP(context.Background(), "test@file")
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assert.Error(t, err, "cannot create service: multi-types service not supported, consider declaring two different pieces of service instead")
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}
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