Merge pull request #18 from jkaninda/refactor

Refactor

.env.example

@@ -1,8 +1,8 @@
-GOMA_LISTEN_ADDR=localhost:80
-GOMA_CONFIG_FILE=/config/goma.yml
-GOMA_ACCESS_LOG=/dev/Stdout
-GOMA_ERROR_LOG=/dev/stderr
+GOMA_LISTEN_ADDR=0.0.0.0:80
 GOMA_WRITE_TIMEOUT=15
 GOMA_READ_TIMEOUT=15
 GOMA_IDLE_TIMEOUT=30
-GOMA_RATE_LIMITER=10
+GOMA_RATE_LIMITER=10
+GOMA_ACCESS_LOG=/dev/Stdout
+GOMA_ERROR_LOG=/dev/stderr
+GOMA_CONFIG_FILE=/config/goma.yml

README.md

@@ -106,7 +106,7 @@ docker run --rm --name goma-gateway \
 Create a config file in this format
 ## Customize configuration file
 
-Example of configuration file
+Example of a configuration file
 ```yaml
 ## Goma - simple lightweight API Gateway and Reverse Proxy.
 # Goma Gateway configurations
@@ -119,7 +119,7 @@ gateway:
   readTimeout: 15
   # Proxy idle timeout
   idleTimeout: 60
-  # Proxy rate limit, it's In-Memory Token Bucket
+  # Proxy rate limit, it's In-Memory IP based
   # Distributed Rate Limiting for Token based across multiple instances is not yet integrated
   rateLimiter: 0
   accessLog:    "/dev/Stdout"
@@ -128,6 +128,8 @@ gateway:
   disableRouteHealthCheckError: false
   # Disable display routes on start
   disableDisplayRouteOnStart: false
+  # disableKeepAlive allows enabling and disabling KeepALive server
+  disableKeepAlive: false
   # interceptErrors intercepts backend errors based on defined the status codes
   interceptErrors:
     - 405
@@ -194,7 +196,7 @@ gateway:
         - path: /path-example
           # Rules defines which specific middleware applies to a route path
           rules:
-            - jwtAuth
+            - jwt
         # path to protect
         - path: /admin
           # Rules defines which specific middleware applies to a route path
@@ -204,7 +206,7 @@ gateway:
         - path: /path-example
           # Rules defines which specific middleware applies to a route path
           rules:
-            - jwtAuth
+            - jwt
         - path: /history
           http:
             url: http://security-service:8080/security/authUser
@@ -236,15 +238,15 @@ gateway:
 #Defines proxy middlewares
 middlewares:
   # Enable Basic auth authorization based
-  - name: local-auth-basic
-    # Authentication types | jwtAuth, basicAuth, auth0
+  - name: basic-auth
+    # Authentication types | jwt, basic, OAuth
     type: basic
     rule:
       username: admin
       password: admin
   #Enables JWT authorization based on the result of a request and continues the request.
   - name: google-auth
-    # Authentication types | jwtAuth, basicAuth, OAuth
+    # Authentication types | jwt, basic, OAuth
     # jwt authorization based on the result of backend's response and continue the request when the client is authorized
     type: jwt
     rule:

cmd/config/config.go

@@ -23,7 +23,7 @@ import (
 
 var Cmd = &cobra.Command{
 	Use:   "config",
-	Short: "Goma configuration",
+	Short: "Goma Gateway configuration management",
 	Run: func(cmd *cobra.Command, args []string) {
 		if len(args) == 0 {
 			return

cmd/root.go

@@ -28,7 +28,7 @@ var rootCmd = &cobra.Command{
 	Use:     "goma",
 	Short:   "Goma Gateway is a lightweight API Gateway, Reverse Proxy",
 	Long:    `.`,
-	Example: "",
+	Example: util.MainExample,
 	Version: util.FullVersion(),
 }
 

goma.yml

@@ -9,7 +9,7 @@ gateway:
   readTimeout: 15
   # Proxy idle timeout
   idleTimeout: 60
-  # Proxy rate limit, it's In-Memory Token Bucket
+  # Proxy rate limit, it's In-Memory IP based
   # Distributed Rate Limiting for Token based across multiple instances is not yet integrated
   rateLimiter: 0
   accessLog:    "/dev/Stdout"
@@ -18,6 +18,8 @@ gateway:
   disableRouteHealthCheckError: false
   # Disable display routes on start
   disableDisplayRouteOnStart: false
+  # disableKeepAlive allows enabling and disabling KeepALive server
+  disableKeepAlive: false
   # interceptErrors intercepts backend errors based on defined the status codes
   interceptErrors:
    - 405
@@ -84,7 +86,7 @@ gateway:
         - path: /path-example
           # Rules defines which specific middleware applies to a route path
           rules:
-            - jwtAuth
+            - jwt
         # path to protect
         - path: /admin
           # Rules defines which specific middleware applies to a route path
@@ -94,7 +96,7 @@ gateway:
         - path: /path-example
           # Rules defines which specific middleware applies to a route path
           rules:
-            - jwtAuth
+            - jwt
         - path: /history
           http:
             url: http://security-service:8080/security/authUser
@@ -126,7 +128,7 @@ gateway:
 #Defines proxy middlewares
 middlewares:
   # Enable Basic auth authorization based
-  - name: local-auth-basic
+  - name: basic-auth
     # Authentication types | jwt, basic, OAuth
     type: basic
     rule:

pkg/config.go

@@ -77,6 +77,12 @@ type JWTRuler struct {
 	//e.g: Header X-Auth-UserId to query userId
 	Params map[string]string `yaml:"params"`
 }
+type RateLimiter struct {
+	// ipBased, tokenBased
+	Type string  `yaml:"type"`
+	Rate float64 `yaml:"rate"`
+	Rule int     `yaml:"rule"`
+}
 
 // Middleware defined the route middleware
 type Middleware struct {
@@ -146,22 +152,27 @@ type Gateway struct {
 	// IdleTimeout defines proxy idle timeout
 	IdleTimeout int `yaml:"idleTimeout" env:"GOMA_IDLE_TIMEOUT, overwrite"`
 	// RateLimiter Defines number of request peer minute
-	RateLimiter                  int    `yaml:"rateLimiter" env:"GOMA_RATE_LIMITER, overwrite"`
-	AccessLog                    string `yaml:"accessLog" env:"GOMA_ACCESS_LOG, overwrite"`
-	ErrorLog                     string `yaml:"errorLog" env:"GOMA_ERROR_LOG=, overwrite"`
-	DisableRouteHealthCheckError bool   `yaml:"disableRouteHealthCheckError"`
-	//Disable dispelling routes on start
-	DisableDisplayRouteOnStart bool  `yaml:"disableDisplayRouteOnStart"`
-	InterceptErrors            []int `yaml:"interceptErrors"`
-	EnableKeepAlive            bool  `yaml:"enableKeepAlive"`
-	// Cors contains the proxy global cors
+	RateLimiter int    `yaml:"rateLimiter" env:"GOMA_RATE_LIMITER, overwrite"`
+	AccessLog   string `yaml:"accessLog" env:"GOMA_ACCESS_LOG, overwrite"`
+	ErrorLog    string `yaml:"errorLog" env:"GOMA_ERROR_LOG=, overwrite"`
+	// DisableRouteHealthCheckError allows enabling and disabling backend healthcheck errors
+	DisableRouteHealthCheckError bool `yaml:"disableRouteHealthCheckError"`
+	//Disable allows enabling and disabling displaying routes on start
+	DisableDisplayRouteOnStart bool `yaml:"disableDisplayRouteOnStart"`
+	// DisableKeepAlive allows enabling and disabling KeepALive server
+	DisableKeepAlive bool `yaml:"disableKeepAlive"`
+	// InterceptErrors holds the status codes to intercept the error from backend
+	InterceptErrors []int `yaml:"interceptErrors"`
+	// Cors holds proxy global cors
 	Cors Cors `yaml:"cors"`
-	// Routes defines the proxy routes
+	// Routes holds proxy routes
 	Routes []Route `yaml:"routes"`
 }
 type GatewayConfig struct {
-	GatewayConfig Gateway      `yaml:"gateway"`
-	Middlewares   []Middleware `yaml:"middlewares"`
+	// GatewayConfig holds Gateway config
+	GatewayConfig Gateway `yaml:"gateway"`
+	// Middlewares holds proxy middlewares
+	Middlewares []Middleware `yaml:"middlewares"`
 }
 
 // ErrorResponse represents the structure of the JSON error response
@@ -365,7 +376,7 @@ func ToJWTRuler(input interface{}) (JWTRuler, error) {
 		return JWTRuler{}, fmt.Errorf("error parsing yaml: %v", err)
 	}
 	if jWTRuler.URL == "" {
-		return JWTRuler{}, fmt.Errorf("error parsing yaml: empty url in %s auth middleware", jwtAuth)
+		return JWTRuler{}, fmt.Errorf("error parsing yaml: empty url in jwt auth middleware")
 
 	}
 	return *jWTRuler, nil

pkg/middleware/bloclist.go

@@ -30,7 +30,7 @@ func (blockList BlockListMiddleware) BlocklistMiddleware(next http.Handler) http
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		for _, block := range blockList.List {
 			if isPathBlocked(r.URL.Path, util.ParseURLPath(blockList.Path+block)) {
-				logger.Error("Access to %s is forbidden", r.URL.Path)
+				logger.Warn("%s: access to %s is forbidden", getRealIP(r), r.URL.Path)
 				w.Header().Set("Content-Type", "application/json")
 				w.WriteHeader(http.StatusNotFound)
 				err := json.NewEncoder(w).Encode(ProxyResponseError{

pkg/middleware/middleware.go

@@ -65,8 +65,8 @@ type ProxyResponseError struct {
 	Message string `json:"message"`
 }
 
-// AuthJWT  Define struct
-type AuthJWT struct {
+// JwtAuth  Define struct
+type JwtAuth struct {
 	AuthURL         string
 	RequiredHeaders []string
 	Headers         map[string]string
@@ -97,9 +97,9 @@ type AuthBasic struct {
 // AuthMiddleware authenticate the client using JWT
 //
 //	authorization based on the result of backend's response and continue the request when the client is authorized
-func (amw AuthJWT) AuthMiddleware(next http.Handler) http.Handler {
+func (jwtAuth JwtAuth) AuthMiddleware(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		for _, header := range amw.RequiredHeaders {
+		for _, header := range jwtAuth.RequiredHeaders {
 			if r.Header.Get(header) == "" {
 				logger.Error("Proxy error, missing %s header", header)
 				w.Header().Set("Content-Type", "application/json")
@@ -116,7 +116,7 @@ func (amw AuthJWT) AuthMiddleware(next http.Handler) http.Handler {
 			}
 		}
 		//token := r.Header.Get("Authorization")
-		authURL, err := url.Parse(amw.AuthURL)
+		authURL, err := url.Parse(jwtAuth.AuthURL)
 		if err != nil {
 			logger.Error("Error parsing auth URL: %v", err)
 			w.Header().Set("Content-Type", "application/json")
@@ -162,7 +162,7 @@ func (amw AuthJWT) AuthMiddleware(next http.Handler) http.Handler {
 		authResp, err := client.Do(authReq)
 		if err != nil || authResp.StatusCode != http.StatusOK {
 			logger.Info("%s %s %s %s", r.Method, r.RemoteAddr, r.URL, r.UserAgent())
-			logger.Error("Proxy authentication error")
+			logger.Warn("Proxy authentication error")
 			w.Header().Set("Content-Type", "application/json")
 			w.WriteHeader(http.StatusUnauthorized)
 			err = json.NewEncoder(w).Encode(ProxyResponseError{
@@ -183,15 +183,15 @@ func (amw AuthJWT) AuthMiddleware(next http.Handler) http.Handler {
 		}(authResp.Body)
 		// Inject specific header tp the current request's header
 		// Add header to the next request from AuthRequest header, depending on your requirements
-		if amw.Headers != nil {
-			for k, v := range amw.Headers {
+		if jwtAuth.Headers != nil {
+			for k, v := range jwtAuth.Headers {
 				r.Header.Set(v, authResp.Header.Get(k))
 			}
 		}
 		query := r.URL.Query()
 		// Add query parameters to the next request from AuthRequest header, depending on your requirements
-		if amw.Params != nil {
-			for k, v := range amw.Params {
+		if jwtAuth.Params != nil {
+			for k, v := range jwtAuth.Params {
 				query.Set(v, authResp.Header.Get(k))
 			}
 		}
@@ -214,7 +214,7 @@ func (basicAuth AuthBasic) AuthMiddleware(next http.Handler) http.Handler {
 			err := json.NewEncoder(w).Encode(ProxyResponseError{
 				Success: false,
 				Code:    http.StatusUnauthorized,
-				Message: "Unauthorized",
+				Message: http.StatusText(http.StatusUnauthorized),
 			})
 			if err != nil {
 				return
@@ -229,7 +229,7 @@ func (basicAuth AuthBasic) AuthMiddleware(next http.Handler) http.Handler {
 			err := json.NewEncoder(w).Encode(ProxyResponseError{
 				Success: false,
 				Code:    http.StatusUnauthorized,
-				Message: "Unauthorized",
+				Message: http.StatusText(http.StatusUnauthorized),
 			})
 			if err != nil {
 				return
@@ -246,7 +246,7 @@ func (basicAuth AuthBasic) AuthMiddleware(next http.Handler) http.Handler {
 			err := json.NewEncoder(w).Encode(ProxyResponseError{
 				Success: false,
 				Code:    http.StatusUnauthorized,
-				Message: "Unauthorized",
+				Message: http.StatusText(http.StatusUnauthorized),
 			})
 			if err != nil {
 				return
@@ -263,7 +263,7 @@ func (basicAuth AuthBasic) AuthMiddleware(next http.Handler) http.Handler {
 			err := json.NewEncoder(w).Encode(ProxyResponseError{
 				Success: false,
 				Code:    http.StatusUnauthorized,
-				Message: "Unauthorized",
+				Message: http.StatusText(http.StatusUnauthorized),
 			})
 			if err != nil {
 				return

pkg/route.go

@@ -46,7 +46,7 @@ func (gatewayServer GatewayServer) Initialize() *mux.Router {
 				Path: route.Path,
 				List: route.Blocklist,
 			}
-			// Apply route middleware
+			// Apply route middlewares
 			for _, mid := range route.Middlewares {
 				if mid.Path != "" {
 					secureRouter := r.PathPrefix(util.ParseURLPath(route.Path + mid.Path)).Subrouter()
@@ -63,7 +63,7 @@ func (gatewayServer GatewayServer) Initialize() *mux.Router {
 					} else {
 						//Check Authentication middleware
 						switch rMiddleware.Type {
-						case basicAuth, "basic":
+						case "basic":
 							basicAuth, err := ToBasicAuth(rMiddleware.Rule)
 							if err != nil {
 								logger.Error("Error: %s", err.Error())
@@ -80,12 +80,12 @@ func (gatewayServer GatewayServer) Initialize() *mux.Router {
 								secureRouter.PathPrefix("/").Handler(proxyRoute.ProxyHandler()) // Proxy handler
 								secureRouter.PathPrefix("").Handler(proxyRoute.ProxyHandler())  // Proxy handler
 							}
-						case jwtAuth, "jwt":
+						case "jwt":
 							jwt, err := ToJWTRuler(rMiddleware.Rule)
 							if err != nil {
 								logger.Error("Error: %s", err.Error())
 							} else {
-								amw := middleware.AuthJWT{
+								amw := middleware.JwtAuth{
 									AuthURL:         jwt.URL,
 									RequiredHeaders: jwt.RequiredHeaders,
 									Headers:         jwt.Headers,
@@ -98,7 +98,7 @@ func (gatewayServer GatewayServer) Initialize() *mux.Router {
 								secureRouter.PathPrefix("").Handler(proxyRoute.ProxyHandler())  // Proxy handler
 
 							}
-						case OAuth, "auth0":
+						case "OAuth":
 							logger.Error("OAuth is not yet implemented")
 							logger.Info("Auth middleware ignored")
 						default:

pkg/server.go

@@ -40,7 +40,7 @@ func (gatewayServer GatewayServer) Start(ctx context.Context) error {
 		printRoute(gatewayServer.gateway.Routes)
 	}
 	// Set KeepAlive
-	srv.SetKeepAlivesEnabled(gatewayServer.gateway.EnableKeepAlive)
+	srv.SetKeepAlivesEnabled(!gatewayServer.gateway.DisableKeepAlive)
 	go func() {
 
 		logger.Info("Started Goma Gateway server on %v", gatewayServer.gateway.ListenAddr)

pkg/var.go

@@ -2,7 +2,4 @@ package pkg
 
 const ConfigFile = "/config/goma.yml"
 const accessControlAllowOrigin = "Access-Control-Allow-Origin"
-const basicAuth = "basicAuth"
-const jwtAuth = "jwtAuth"
-const OAuth = "OAuth"
 const serverName = "Goma"

util/constants.go

@@ -29,3 +29,7 @@ func FullVersion() string {
 	}
 	return ver
 }
+
+const MainExample = "Initialize config: init config --output config.yml\n" +
+	"Start server: server \n" +
+	"Start server with custom config file: server --config config.yml"