feat(plugins): add traefik plugin

.traefik.yml

@@ -7,7 +7,14 @@ import: github.com/acouvreur/sablier/plugins/traefik
 summary: "Start your containers on demand, shut them down automatically when there's no activity. Docker, Docker Swarm Mode and Kubernetes compatible."
 
 testData:
-  serviceUrl: http://sablier:10000
-  name: whoami
-  timeout: 1m
-  
+  sablierUrl: http://sablier:10000
+  names: whoami,nginx # comma separated names
+  sessionDuration: 1m
+  # Dynamic strategy, provides the waiting webui
+  dynamic:
+    displayName: My Title
+    theme: hacker-terminal
+  # Blocking strategy, waits until services are up and running
+  # but will not wait more than `timeout`
+  blocking: 
+    timeout: 1m

app/http/routes/models/blocking_request.go

@@ -3,7 +3,7 @@ package models
 import "time"
 
 type BlockingRequest struct {
-	Names           []string
-	SessionDuration time.Duration
-	Timeout         time.Duration
+	Names           []string      `form:"names" binding:"required"`
+	SessionDuration time.Duration `form:"session_duration" binding:"required"`
+	Timeout         time.Duration `form:"timeout"`
 }

app/http/routes/models/dynamic_request.go

@@ -6,7 +6,7 @@ import (
 
 type DynamicRequest struct {
 	Names           []string      `form:"names" binding:"required"`
-	DisplayName     string        `form:"display-name" binding:"required"`
-	Theme           string        `form:"theme" binding:"required"`
-	SessionDuration time.Duration `form:"session-duration" binding:"required"`
+	DisplayName     string        `form:"display_name"`
+	Theme           string        `form:"theme"`
+	SessionDuration time.Duration `form:"session_duration" binding:"required"`
 }

app/http/routes/strategies.go

@@ -34,9 +34,9 @@ func (s *ServeStrategy) ServeDynamic(c *gin.Context) {
 	sessionState := s.SessionsManager.RequestSession(request.Names, request.SessionDuration)
 
 	if sessionState.IsReady() {
-		// All requests are fulfilled, redirect to
-		c.Redirect(http.StatusTemporaryRedirect, "origin")
-		return
+		c.Header("X-Sablier-Session-Status", "ready")
+	} else {
+		c.Header("X-Sablier-Session-Status", "not-ready")
 	}
 
 	renderOptions := pages.RenderOptions{
@@ -67,9 +67,9 @@ func (s *ServeStrategy) ServeBlocking(c *gin.Context) {
 	sessionState := s.SessionsManager.RequestReadySession(request.Names, request.SessionDuration, request.Timeout)
 
 	if sessionState.IsReady() {
-		// All requests are fulfilled, redirect to
-		c.Redirect(http.StatusTemporaryRedirect, "origin")
-		return
+		c.Header("X-Sablier-Session-Status", "ready")
+	} else {
+		c.Header("X-Sablier-Session-Status", "not-ready")
 	}
 
 }

app/http/routes/strategies_test.go

@@ -43,9 +43,10 @@ func TestServeStrategy_ServeDynamic(t *testing.T) {
 		session sessions.SessionState
 	}
 	tests := []struct {
-		name         string
-		arg          arg
-		expectedCode int
+		name                string
+		arg                 arg
+		expectedHeaderKey   string
+		expectedHeaderValue string
 	}{
 		{
 			name: "return HTML Theme",
@@ -62,7 +63,8 @@ func TestServeStrategy_ServeDynamic(t *testing.T) {
 					}),
 				},
 			},
-			expectedCode: http.StatusOK,
+			expectedHeaderKey:   "X-Sablier-Session-Status",
+			expectedHeaderValue: "not-ready",
 		},
 		{
 			name: "temporary redirect when session is ready",
@@ -79,7 +81,8 @@ func TestServeStrategy_ServeDynamic(t *testing.T) {
 					}),
 				},
 			},
-			expectedCode: http.StatusTemporaryRedirect,
+			expectedHeaderKey:   "X-Sablier-Session-Status",
+			expectedHeaderValue: "ready",
 		},
 	}
 	for _, tt := range tests {
@@ -99,7 +102,7 @@ func TestServeStrategy_ServeDynamic(t *testing.T) {
 			res := recorder.Result()
 			defer res.Body.Close()
 
-			assert.Equal(t, c.Writer.Status(), tt.expectedCode)
+			assert.Equal(t, c.Writer.Header().Get(tt.expectedHeaderKey), tt.expectedHeaderValue)
 		})
 	}
 }

app/sessions/sessions_manager.go

@@ -140,7 +140,7 @@ func (s *SessionsManager) requestSessionInstance(name string, duration time.Dura
 }
 
 func (s *SessionsManager) RequestReadySession(names []string, duration time.Duration, timeout time.Duration) *SessionState {
-	return nil
+	return s.RequestSession(names, duration)
 }
 
 func (s *SessionsManager) ExpiresAfter(instance *instance.State, duration time.Duration) {

plugins/traefik/config.go

@@ -0,0 +1,122 @@
+package traefik
+
+import (
+	"fmt"
+	"net/http"
+	"strings"
+)
+
+type DynamicConfiguration struct {
+	DisplayName string `yaml:"displayname"`
+	Theme       string `yaml:"theme"`
+}
+
+type BlockingConfiguration struct {
+	Timeout string `yaml:"timeout"`
+}
+
+type Config struct {
+	SablierURL      string `yaml:"sablierUrl"`
+	Names           string `yaml:"names"`
+	SessionDuration string `yaml:"sessionDuration"`
+	splittedNames   []string
+	Dynamic         *DynamicConfiguration  `yaml:"dynamic"`
+	Blocking        *BlockingConfiguration `yaml:"blocking"`
+	Next            http.Handler
+}
+
+func CreateConfig() *Config {
+	return &Config{
+		SablierURL:      "http://sablier:10000",
+		Names:           "",
+		SessionDuration: "",
+		splittedNames:   []string{},
+		Dynamic:         nil,
+		Blocking:        nil,
+	}
+}
+
+func (c *Config) BuildRequest() (*http.Request, error) {
+
+	if len(c.SablierURL) == 0 {
+		return nil, fmt.Errorf("sablierURL cannot be empty")
+	}
+
+	names := strings.Split(c.Names, ",")
+	for i := range names {
+		names[i] = strings.TrimSpace(names[i])
+	}
+
+	c.splittedNames = names
+
+	if len(names) == 0 {
+		return nil, fmt.Errorf("you must specify at least one name")
+	}
+
+	if c.Dynamic != nil && c.Blocking != nil {
+		return nil, fmt.Errorf("only supply one strategy: dynamic or blocking")
+	}
+
+	if c.Dynamic != nil {
+		return c.buildDynamicRequest()
+	} else if c.Blocking != nil {
+		return c.buildBlockingRequest()
+	}
+	return nil, fmt.Errorf("no strategy configured")
+}
+
+func (c *Config) buildDynamicRequest() (*http.Request, error) {
+	if c.Dynamic == nil {
+		return nil, fmt.Errorf("dynamic config is nil")
+	}
+
+	request, err := http.NewRequest("GET", fmt.Sprintf("%s/api/strategies/dynamic", c.SablierURL), nil)
+	if err != nil {
+		return nil, err
+	}
+
+	q := request.URL.Query()
+
+	q.Add("session_duration", c.SessionDuration)
+	for _, name := range c.splittedNames {
+		q.Add("names", name)
+	}
+
+	if c.Dynamic.DisplayName != "" {
+		q.Add("display_name", c.Dynamic.DisplayName)
+	}
+
+	if c.Dynamic.Theme != "" {
+		q.Add("theme", c.Dynamic.Theme)
+	}
+
+	request.URL.RawQuery = q.Encode()
+
+	return request, nil
+}
+
+func (c *Config) buildBlockingRequest() (*http.Request, error) {
+	if c.Blocking == nil {
+		return nil, fmt.Errorf("blocking config is nil")
+	}
+
+	request, err := http.NewRequest("GET", fmt.Sprintf("%s/api/strategies/blocking", c.SablierURL), nil)
+	if err != nil {
+		return nil, err
+	}
+
+	q := request.URL.Query()
+
+	q.Add("session_duration", c.SessionDuration)
+	for _, name := range c.splittedNames {
+		q.Add("names", name)
+	}
+
+	if c.Blocking.Timeout != "" {
+		q.Add("timeout", c.Blocking.Timeout)
+	}
+
+	request.URL.RawQuery = q.Encode()
+
+	return request, nil
+}

plugins/traefik/config_test.go

@@ -0,0 +1,129 @@
+package traefik_test
+
+import (
+	"io"
+	"net/http"
+	"reflect"
+	"testing"
+
+	"github.com/acouvreur/sablier/plugins/traefik"
+)
+
+func TestConfig_BuildRequest(t *testing.T) {
+	type fields struct {
+		SablierURL      string
+		Names           string
+		SessionDuration string
+		Dynamic         *traefik.DynamicConfiguration
+		Blocking        *traefik.BlockingConfiguration
+	}
+	tests := []struct {
+		name    string
+		fields  fields
+		want    *http.Request
+		wantErr bool
+	}{
+		{
+			name: "dynamic session with default values",
+			fields: fields{
+				SablierURL:      "http://sablier:10000",
+				Names:           "nginx , apache",
+				SessionDuration: "1m",
+				Dynamic:         &traefik.DynamicConfiguration{},
+			},
+			want:    createRequest("GET", "http://sablier:10000/api/strategies/dynamic?names=nginx&names=apache&session_duration=1m", nil),
+			wantErr: false,
+		},
+		{
+			name: "dynamic session with theme values",
+			fields: fields{
+				SablierURL:      "http://sablier:10000",
+				Names:           "nginx , apache",
+				SessionDuration: "1m",
+				Dynamic: &traefik.DynamicConfiguration{
+					Theme: "hacker-terminal",
+				},
+			},
+			want:    createRequest("GET", "http://sablier:10000/api/strategies/dynamic?names=nginx&names=apache&session_duration=1m&theme=hacker-terminal", nil),
+			wantErr: false,
+		},
+		{
+			name: "dynamic session with theme and display name values",
+			fields: fields{
+				SablierURL:      "http://sablier:10000",
+				Names:           "nginx , apache",
+				SessionDuration: "1m",
+				Dynamic: &traefik.DynamicConfiguration{
+					Theme:       "hacker-terminal",
+					DisplayName: "Hello World!",
+				},
+			},
+			want:    createRequest("GET", "http://sablier:10000/api/strategies/dynamic?display_name=Hello+World%21&names=nginx&names=apache&session_duration=1m&theme=hacker-terminal", nil),
+			wantErr: false,
+		},
+		{
+			name: "blocking session with default values",
+			fields: fields{
+				SablierURL:      "http://sablier:10000",
+				Names:           "nginx , apache",
+				SessionDuration: "1m",
+				Blocking:        &traefik.BlockingConfiguration{},
+			},
+			want:    createRequest("GET", "http://sablier:10000/api/strategies/blocking?names=nginx&names=apache&session_duration=1m", nil),
+			wantErr: false,
+		},
+		{
+			name: "blocking session with timeout value",
+			fields: fields{
+				SablierURL:      "http://sablier:10000",
+				Names:           "nginx , apache",
+				SessionDuration: "1m",
+				Blocking: &traefik.BlockingConfiguration{
+					Timeout: "5m",
+				},
+			},
+			want:    createRequest("GET", "http://sablier:10000/api/strategies/blocking?names=nginx&names=apache&session_duration=1m&timeout=5m", nil),
+			wantErr: false,
+		},
+		{
+			name: "both strategies defined",
+			fields: fields{
+				SablierURL:      "http://sablier:10000",
+				Names:           "nginx , apache",
+				SessionDuration: "1m",
+				Dynamic:         &traefik.DynamicConfiguration{},
+				Blocking:        &traefik.BlockingConfiguration{},
+			},
+			want:    nil,
+			wantErr: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			c := &traefik.Config{
+				SablierURL:      tt.fields.SablierURL,
+				Names:           tt.fields.Names,
+				SessionDuration: tt.fields.SessionDuration,
+				Dynamic:         tt.fields.Dynamic,
+				Blocking:        tt.fields.Blocking,
+			}
+
+			got, err := c.BuildRequest()
+			if (err != nil) != tt.wantErr {
+				t.Errorf("Config.BuildRequest() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("Config.BuildRequest() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func createRequest(method string, url string, body io.Reader) *http.Request {
+	request, err := http.NewRequest(method, url, body)
+	if err != nil {
+		panic(err)
+	}
+	return request
+}

plugins/traefik/main.go

@@ -0,0 +1,51 @@
+package traefik
+
+import (
+	"context"
+	"io"
+	"net/http"
+)
+
+type SablierMiddleware struct {
+	client  *http.Client
+	request *http.Request
+	Next    http.Handler
+}
+
+// New function creates the configuration
+func New(ctx context.Context, next http.Handler, config *Config, name string) (http.Handler, error) {
+	req, err := config.BuildRequest()
+
+	if err != nil {
+		return nil, err
+	}
+
+	return &SablierMiddleware{
+		request: req,
+		client:  &http.Client{},
+		Next:    config.Next,
+	}, nil
+}
+
+func (sm *SablierMiddleware) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+	sablierRequest := sm.request.Clone(context.TODO())
+
+	resp, err := sm.client.Do(sablierRequest)
+	if err != nil {
+		http.Error(rw, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	defer resp.Body.Close()
+
+	if resp.Header.Get("X-Sablier-Session-Status") == "ready" {
+		sm.Next.ServeHTTP(rw, req)
+	} else {
+		forward(resp, rw)
+	}
+}
+
+func forward(resp *http.Response, rw http.ResponseWriter) {
+	rw.Header().Set("Content-Type", resp.Header.Get("Content-Type"))
+	rw.Header().Set("Content-Length", resp.Header.Get("Content-Length"))
+	io.Copy(rw, resp.Body)
+}

plugins/traefik/main_test.go

@@ -0,0 +1,97 @@
+package traefik
+
+import (
+	"context"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestSablierMiddleware_ServeHTTP(t *testing.T) {
+	type fields struct {
+		Next   http.Handler
+		Config *Config
+	}
+	type sablier struct {
+		headers map[string]string
+		body    string
+	}
+	tests := []struct {
+		name     string
+		fields   fields
+		sablier  sablier
+		expected string
+	}{
+		{
+			name: "sablier service is ready",
+			sablier: sablier{
+				headers: map[string]string{
+					"X-Sablier-Session-Status": "ready",
+				},
+				body: "response from sablier",
+			},
+			fields: fields{
+				Config: &Config{
+					Dynamic: &DynamicConfiguration{},
+					Next: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+						fmt.Fprint(w, "response from service")
+					}),
+				},
+			},
+			expected: "response from service",
+		},
+		{
+			name: "sablier service is not ready",
+			sablier: sablier{
+				headers: map[string]string{
+					"X-Sablier-Session-Status": "not-ready",
+				},
+				body: "response from sablier",
+			},
+			fields: fields{
+				Config: &Config{
+					Dynamic: &DynamicConfiguration{},
+					Next: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+						fmt.Fprint(w, "response from service")
+					}),
+				},
+			},
+			expected: "response from sablier",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			sablierMockServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				for key, value := range tt.sablier.headers {
+					w.Header().Add(key, value)
+				}
+				w.Write([]byte(tt.sablier.body))
+			}))
+			defer sablierMockServer.Close()
+
+			tt.fields.Config.SablierURL = sablierMockServer.URL
+
+			sm, err := New(context.Background(), tt.fields.Next, tt.fields.Config, "middleware")
+			if err != nil {
+				panic(err)
+			}
+
+			req := httptest.NewRequest(http.MethodGet, "/my-nginx", nil)
+			w := httptest.NewRecorder()
+
+			sm.ServeHTTP(w, req)
+
+			res := w.Result()
+			defer res.Body.Close()
+			data, err := ioutil.ReadAll(res.Body)
+			if err != nil {
+				t.Errorf("expected error to be nil got %v", err)
+			}
+			if string(data) != tt.expected {
+				t.Errorf("expected %s got %v", tt.expected, string(data))
+			}
+		})
+	}
+}

plugins/traefik/ondemand.go

@@ -1,126 +0,0 @@
-package traefik
-
-import (
-	"context"
-	"fmt"
-	"net/http"
-	"time"
-
-	"github.com/acouvreur/sablier/plugins/traefik/pkg/strategy"
-)
-
-// Config the plugin configuration
-type Config struct {
-	Name        string   `yaml:"name"`
-	Names       []string `yaml:"names"`
-	ServiceUrl  string   `yaml:"serviceurl"`
-	Timeout     string   `yaml:"timeout"`
-	ErrorPage   string   `yaml:"errorpage"`
-	LoadingPage string   `yaml:"loadingpage"`
-	WaitUi      bool     `yaml:"waitui"`
-	DisplayName string   `yaml:"displayname"`
-	BlockDelay  string   `yaml:"blockdelay"`
-}
-
-// CreateConfig creates a config with its default values
-func CreateConfig() *Config {
-	return &Config{
-		Timeout:     "1m",
-		WaitUi:      true,
-		BlockDelay:  "1m",
-		DisplayName: "",
-		ErrorPage:   "",
-		LoadingPage: "",
-	}
-}
-
-// Ondemand holds the request for the on demand service
-type Ondemand struct {
-	strategy strategy.Strategy
-}
-
-func buildRequest(url string, name string, timeout time.Duration) (string, error) {
-	request := fmt.Sprintf("%s?name=%s&timeout=%s", url, name, timeout.String())
-	return request, nil
-}
-
-// New function creates the configuration
-func New(ctx context.Context, next http.Handler, config *Config, name string) (http.Handler, error) {
-	if len(config.ServiceUrl) == 0 {
-		return nil, fmt.Errorf("serviceurl cannot be null")
-	}
-
-	if len(config.Name) != 0 && len(config.Names) != 0 {
-		return nil, fmt.Errorf("both name and names cannot be used simultaneously")
-	}
-	var serviceNames []string
-
-	if len(config.Name) != 0 {
-		serviceNames = append(serviceNames, config.Name)
-	} else if len(config.Names) != 0 {
-		serviceNames = config.Names
-	} else {
-		return nil, fmt.Errorf("both name and names cannot be null")
-	}
-
-	timeout, err := time.ParseDuration(config.Timeout)
-
-	if err != nil {
-		return nil, err
-	}
-	var requests []string
-
-	for _, serviceName := range serviceNames {
-		request, err := buildRequest(config.ServiceUrl, serviceName, timeout)
-
-		if err != nil {
-			return nil, fmt.Errorf("error while building request for %s", serviceName)
-		}
-		requests = append(requests, request)
-	}
-
-	strategy, err := config.getServeStrategy(requests, name, next, timeout)
-
-	if err != nil {
-		return nil, err
-	}
-
-	return &Ondemand{
-		strategy: strategy,
-	}, nil
-}
-
-func (config *Config) getServeStrategy(requests []string, name string, next http.Handler, timeout time.Duration) (strategy.Strategy, error) {
-	if config.WaitUi {
-		return &strategy.DynamicStrategy{
-			Requests:    requests,
-			Name:        name,
-			Next:        next,
-			Timeout:     timeout,
-			DisplayName: config.DisplayName,
-			ErrorPage:   config.ErrorPage,
-			LoadingPage: config.LoadingPage,
-		}, nil
-	} else {
-
-		blockDelay, err := time.ParseDuration(config.BlockDelay)
-
-		if err != nil {
-			return nil, err
-		}
-
-		return &strategy.BlockingStrategy{
-			Requests:           requests,
-			Name:               name,
-			Next:               next,
-			Timeout:            timeout,
-			BlockDelay:         blockDelay,
-			BlockCheckInterval: 1 * time.Second,
-		}, nil
-	}
-}
-
-// ServeHTTP retrieve the service status
-func (e *Ondemand) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
-	e.strategy.ServeHTTP(rw, req)
-}

plugins/traefik/ondemand_test.go

@@ -1,123 +0,0 @@
-package traefik
-
-import (
-	"context"
-	"net/http"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-)
-
-func TestNewOndemand(t *testing.T) {
-	testCases := []struct {
-		desc          string
-		config        *Config
-		expectedError bool
-	}{
-		{
-			desc: "Invalid Config (no name)",
-			config: &Config{
-				ServiceUrl: "http://ondemand:1000",
-				Timeout:    "1m",
-			},
-			expectedError: true,
-		},
-		{
-			desc: "Invalid Config (empty names)",
-			config: &Config{
-				Names:      []string{},
-				ServiceUrl: "http://ondemand:1000",
-				Timeout:    "1m",
-			},
-			expectedError: true,
-		},
-		{
-			desc: "Invalid Config (empty serviceUrl)",
-			config: &Config{
-				Name:       "whoami",
-				ServiceUrl: "",
-				Timeout:    "1m",
-			},
-			expectedError: true,
-		},
-		{
-			desc: "Invalid Config (name and names used simultaneously)",
-			config: &Config{
-				Names: []string{
-					"whoami-1", "whoami-2",
-				},
-				Name:       "whoami",
-				ServiceUrl: "http://ondemand:1000",
-				WaitUi:     true,
-				BlockDelay: "1m",
-				Timeout:    "1m",
-			},
-			expectedError: true,
-		},
-		{
-			desc: "valid Dynamic Config",
-			config: &Config{
-				Name:       "whoami",
-				ServiceUrl: "http://ondemand:1000",
-				WaitUi:     true,
-				Timeout:    "1m",
-			},
-			expectedError: false,
-		},
-		{
-			desc: "valid Blocking Config",
-			config: &Config{
-				Name:       "whoami",
-				ServiceUrl: "http://ondemand:1000",
-				WaitUi:     false,
-				BlockDelay: "1m",
-				Timeout:    "1m",
-			},
-			expectedError: false,
-		},
-		{
-			desc: "valid Dynamic Multiple Config",
-			config: &Config{
-				Names: []string{
-					"whoami-1", "whoami-2",
-				},
-				ServiceUrl: "http://ondemand:1000",
-				WaitUi:     false,
-				BlockDelay: "1m",
-				Timeout:    "1m",
-			},
-			expectedError: false,
-		},
-		{
-			desc: "valid Blocking Multiple Config",
-			config: &Config{
-				Names: []string{
-					"whoami-1", "whoami-2",
-				},
-				ServiceUrl: "http://ondemand:1000",
-				WaitUi:     true,
-				BlockDelay: "1m",
-				Timeout:    "1m",
-			},
-			expectedError: false,
-		},
-	}
-
-	for _, test := range testCases {
-		test := test
-		t.Run(test.desc, func(t *testing.T) {
-			t.Parallel()
-
-			next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {})
-			ondemand, err := New(context.Background(), next, test.config, "traefikTest")
-
-			if test.expectedError {
-				assert.Error(t, err)
-			} else {
-				require.NoError(t, err)
-				assert.NotNil(t, ondemand)
-			}
-		})
-	}
-}

plugins/traefik/pkg/strategy/blocking_strategy.go

@@ -1,59 +0,0 @@
-package strategy
-
-import (
-	"encoding/json"
-	"fmt"
-	"log"
-	"net/http"
-	"time"
-)
-
-type BlockingStrategy struct {
-	Requests           []string
-	Name               string
-	Next               http.Handler
-	Timeout            time.Duration
-	BlockDelay         time.Duration
-	BlockCheckInterval time.Duration
-}
-
-type InternalServerError struct {
-	ServiceName string `json:"serviceName"`
-	Error       string `json:"error"`
-}
-
-// ServeHTTP retrieve the service status
-func (e *BlockingStrategy) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
-
-	for start := time.Now(); time.Since(start) < e.BlockDelay; {
-		notReadyCount := 0
-		for _, request := range e.Requests {
-
-			log.Printf("Sending request: %s", request)
-			status, err := getServiceStatus(request)
-			log.Printf("Status: %s", status)
-
-			if err != nil {
-				rw.Header().Set("Content-Type", "application/json")
-				rw.WriteHeader(http.StatusInternalServerError)
-				json.NewEncoder(rw).Encode(InternalServerError{ServiceName: e.Name, Error: err.Error()})
-				return
-			}
-
-			if status != "started" {
-				notReadyCount++
-			}
-		}
-		if notReadyCount == 0 {
-			// Services all started forward request
-			e.Next.ServeHTTP(rw, req)
-			return
-		}
-
-		time.Sleep(e.BlockCheckInterval)
-	}
-
-	rw.Header().Set("Content-Type", "application/json")
-	rw.WriteHeader(http.StatusServiceUnavailable)
-	json.NewEncoder(rw).Encode(InternalServerError{ServiceName: e.Name, Error: fmt.Sprintf("Service was unreachable within %s", e.BlockDelay)})
-}

plugins/traefik/pkg/strategy/blocking_strategy_test.go

@@ -1,88 +0,0 @@
-package strategy
-
-import (
-	"fmt"
-	"net/http"
-	"net/http/httptest"
-	"testing"
-	"time"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestSingleBlockingStrategy_ServeHTTP(t *testing.T) {
-	for _, test := range SingleServiceTestCases {
-		test := test
-		t.Run(test.desc, func(t *testing.T) {
-			t.Parallel()
-
-			next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-				w.WriteHeader(http.StatusOK)
-				w.Write([]byte("ok"))
-			})
-
-			mockServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-				w.WriteHeader(test.onDemandServiceResponses[0].status)
-				fmt.Fprint(w, test.onDemandServiceResponses[0].body)
-			}))
-
-			defer mockServer.Close()
-
-			blockingStrategy := &BlockingStrategy{
-				Name:       "whoami",
-				Requests:   []string{mockServer.URL},
-				Next:       next,
-				BlockDelay: 1 * time.Second,
-			}
-
-			recorder := httptest.NewRecorder()
-
-			req := httptest.NewRequest(http.MethodGet, "http://mydomain/whoami", nil)
-
-			blockingStrategy.ServeHTTP(recorder, req)
-
-			assert.Equal(t, test.expected.blocking, recorder.Code)
-		})
-	}
-}
-
-func TestMultipleBlockingStrategy_ServeHTTP(t *testing.T) {
-
-	for _, test := range MultipleServicesTestCases {
-		test := test
-		t.Run(test.desc, func(t *testing.T) {
-			t.Parallel()
-			urls := make([]string, len(test.onDemandServiceResponses))
-			next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-				w.WriteHeader(http.StatusOK)
-				w.Write([]byte("ok"))
-			})
-
-			for responseIndex, response := range test.onDemandServiceResponses {
-				response := response
-				mockServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-					w.WriteHeader(response.status)
-					fmt.Fprint(w, response.body)
-				}))
-
-				defer mockServer.Close()
-				urls[responseIndex] = mockServer.URL
-			}
-			fmt.Println(urls)
-			blockingStrategy := &BlockingStrategy{
-				Name:       "whoami",
-				Requests:   urls,
-				Next:       next,
-				BlockDelay: 1 * time.Second,
-			}
-
-			recorder := httptest.NewRecorder()
-
-			req := httptest.NewRequest(http.MethodGet, "http://mydomain/whoami", nil)
-
-			blockingStrategy.ServeHTTP(recorder, req)
-
-			assert.Equal(t, test.expected.blocking, recorder.Code)
-		})
-	}
-}

plugins/traefik/pkg/strategy/dynamic_strategy.go

@@ -1,62 +0,0 @@
-package strategy
-
-import (
-	"log"
-	"net/http"
-	"time"
-
-	"github.com/acouvreur/sablier/plugins/traefik/pkg/pages"
-)
-
-type DynamicStrategy struct {
-	Requests    []string
-	Name        string
-	Next        http.Handler
-	Timeout     time.Duration
-	DisplayName string
-	LoadingPage string
-	ErrorPage   string
-}
-
-// ServeHTTP retrieve the service status
-func (e *DynamicStrategy) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
-	started := make([]bool, len(e.Requests))
-
-	displayName := e.Name
-	if len(e.DisplayName) > 0 {
-		displayName = e.DisplayName
-	}
-
-	notReadyCount := 0
-	for requestIndex, request := range e.Requests {
-		log.Printf("Sending request: %s", request)
-		status, err := getServiceStatus(request)
-		log.Printf("Status: %s", status)
-
-		if err != nil {
-			rw.WriteHeader(http.StatusInternalServerError)
-			rw.Write([]byte(pages.GetErrorPage(e.ErrorPage, displayName, err.Error())))
-			return
-		}
-
-		if status == "started" {
-			started[requestIndex] = true
-		} else if status == "starting" {
-			started[requestIndex] = false
-			notReadyCount++
-		} else {
-			// Error
-			rw.WriteHeader(http.StatusInternalServerError)
-			rw.Write([]byte(pages.GetErrorPage(e.ErrorPage, displayName, status)))
-			return
-		}
-	}
-	if notReadyCount == 0 {
-		// All services are ready, forward request
-		e.Next.ServeHTTP(rw, req)
-	} else {
-		// Services still starting, notify client
-		rw.WriteHeader(http.StatusAccepted)
-		rw.Write([]byte(pages.GetLoadingPage(e.LoadingPage, displayName, e.Timeout)))
-	}
-}

plugins/traefik/pkg/strategy/dynamic_strategy_test.go

@@ -1,77 +0,0 @@
-package strategy
-
-import (
-	"fmt"
-	"net/http"
-	"net/http/httptest"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestSingleDynamicStrategy_ServeHTTP(t *testing.T) {
-
-	for _, test := range SingleServiceTestCases {
-		test := test
-		t.Run(test.desc, func(t *testing.T) {
-			t.Parallel()
-
-			next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {})
-
-			mockServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-				fmt.Fprint(w, test.onDemandServiceResponses[0].body)
-			}))
-
-			defer mockServer.Close()
-
-			dynamicStrategy := &DynamicStrategy{
-				Name:     "whoami",
-				Requests: []string{mockServer.URL},
-				Next:     next,
-			}
-
-			recorder := httptest.NewRecorder()
-
-			req := httptest.NewRequest(http.MethodGet, "http://mydomain/whoami", nil)
-
-			dynamicStrategy.ServeHTTP(recorder, req)
-
-			assert.Equal(t, test.expected.dynamic, recorder.Code)
-		})
-	}
-}
-
-func TestMultipleDynamicStrategy_ServeHTTP(t *testing.T) {
-	for _, test := range MultipleServicesTestCases {
-		test := test
-		t.Run(test.desc, func(t *testing.T) {
-			t.Parallel()
-
-			next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {})
-
-			urls := make([]string, len(test.onDemandServiceResponses))
-			for responseIndex, response := range test.onDemandServiceResponses {
-				response := response
-				mockServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-					fmt.Fprint(w, response.body)
-				}))
-				defer mockServer.Close()
-
-				urls[responseIndex] = mockServer.URL
-			}
-			dynamicStrategy := &DynamicStrategy{
-				Name:     "whoami",
-				Requests: urls,
-				Next:     next,
-			}
-
-			recorder := httptest.NewRecorder()
-
-			req := httptest.NewRequest(http.MethodGet, "http://mydomain/whoami", nil)
-
-			dynamicStrategy.ServeHTTP(recorder, req)
-
-			assert.Equal(t, test.expected.dynamic, recorder.Code)
-		})
-	}
-}

plugins/traefik/pkg/strategy/strategy.go

@@ -1,44 +0,0 @@
-package strategy
-
-import (
-	"encoding/json"
-	"errors"
-	"net/http"
-	"time"
-)
-
-// Net client is a custom client to timeout after 2 seconds if the service is not ready
-var netClient = &http.Client{
-	Timeout: time.Second * 2,
-}
-
-type SablierResponse struct {
-	State string `json:"state"`
-	Error string `json:"error"`
-}
-
-type Strategy interface {
-	ServeHTTP(rw http.ResponseWriter, req *http.Request)
-}
-
-func getServiceStatus(request string) (string, error) {
-
-	// This request wakes up the service if he's scaled to 0
-	resp, err := netClient.Get(request)
-	if err != nil {
-		return "error", err
-	}
-
-	decoder := json.NewDecoder(resp.Body)
-	var response SablierResponse
-	err = decoder.Decode(&response)
-	if err != nil {
-		return "error from ondemand service", err
-	}
-
-	if resp.StatusCode >= 400 {
-		return "error from ondemand service", errors.New(response.Error)
-	}
-
-	return response.State, nil
-}

plugins/traefik/pkg/strategy/strategy_test_cases.go

@@ -1,141 +0,0 @@
-package strategy
-
-import "encoding/json"
-
-type OnDemandServiceResponses struct {
-	body   string
-	status int
-}
-type ExpectedStatusForStrategy struct {
-	dynamic  int
-	blocking int
-}
-
-type TestCase struct {
-	desc                     string
-	onDemandServiceResponses []OnDemandServiceResponses
-	expected                 ExpectedStatusForStrategy
-}
-
-var SingleServiceTestCases = []TestCase{
-	{
-		desc:                     "service is / keeps on starting",
-		onDemandServiceResponses: GenerateServicesResponses(1, "starting"),
-		expected: ExpectedStatusForStrategy{
-			dynamic:  202,
-			blocking: 503,
-		},
-	},
-	{
-		desc:                     "service is started",
-		onDemandServiceResponses: GenerateServicesResponses(1, "started"),
-		expected: ExpectedStatusForStrategy{
-			dynamic:  200,
-			blocking: 200,
-		},
-	},
-	{
-		desc:                     "ondemand service is in error",
-		onDemandServiceResponses: GenerateServicesResponses(1, "error"),
-		expected: ExpectedStatusForStrategy{
-			dynamic:  500,
-			blocking: 500,
-		},
-	},
-}
-
-func GenerateServicesResponses(count int, serviceBody string) []OnDemandServiceResponses {
-	body, err := json.Marshal(SablierResponse{State: serviceBody, Error: "ko"})
-	if err != nil {
-		return nil
-	}
-	responses := make([]OnDemandServiceResponses, count)
-	for i := 0; i < count; i++ {
-		if serviceBody == "starting" || serviceBody == "started" {
-			responses[i] = OnDemandServiceResponses{
-				body:   string(body),
-				status: 200,
-			}
-		} else {
-			responses[i] = OnDemandServiceResponses{
-				body:   string(body),
-				status: 503,
-			}
-		}
-	}
-	return responses
-}
-
-var MultipleServicesTestCases = []TestCase{
-	{
-		desc:                     "all services are starting",
-		onDemandServiceResponses: GenerateServicesResponses(5, "starting"),
-		expected: ExpectedStatusForStrategy{
-			dynamic:  202,
-			blocking: 503,
-		},
-	},
-	{
-		desc:                     "one started others are starting",
-		onDemandServiceResponses: append(GenerateServicesResponses(1, "starting"), GenerateServicesResponses(4, "started")...),
-		expected: ExpectedStatusForStrategy{
-			dynamic:  202,
-			blocking: 503,
-		},
-	},
-	{
-		desc:                     "one starting others are started",
-		onDemandServiceResponses: append(GenerateServicesResponses(4, "starting"), GenerateServicesResponses(1, "started")...),
-		expected: ExpectedStatusForStrategy{
-			dynamic:  202,
-			blocking: 503,
-		},
-	},
-	{
-		desc: "one errored others are starting",
-		onDemandServiceResponses: append(
-			GenerateServicesResponses(2, "starting"),
-			append(
-				GenerateServicesResponses(1, "error"),
-				GenerateServicesResponses(2, "starting")...,
-			)...,
-		),
-		expected: ExpectedStatusForStrategy{
-			dynamic:  500,
-			blocking: 500,
-		},
-	},
-	{
-		desc: "one errored others are started",
-		onDemandServiceResponses: append(
-			GenerateServicesResponses(1, "error"),
-			GenerateServicesResponses(4, "started")...,
-		),
-		expected: ExpectedStatusForStrategy{
-			dynamic:  500,
-			blocking: 500,
-		},
-	},
-	{
-		desc: "one errored others are mix of starting / started",
-		onDemandServiceResponses: append(
-			GenerateServicesResponses(2, "started"),
-			append(
-				GenerateServicesResponses(1, "error"),
-				GenerateServicesResponses(2, "starting")...,
-			)...,
-		),
-		expected: ExpectedStatusForStrategy{
-			dynamic:  500,
-			blocking: 500,
-		},
-	},
-	{
-		desc:                     "all are started",
-		onDemandServiceResponses: GenerateServicesResponses(5, "started"),
-		expected: ExpectedStatusForStrategy{
-			dynamic:  200,
-			blocking: 200,
-		},
-	},
-}