Split routes, router, and handlers into different files

src/api/routes/handlers.go

@@ -0,0 +1,41 @@
+package routes
+
+import (
+	"database/sql"
+	"encoding/json"
+	"log"
+	"net/http"
+
+	"github.com/danieljsummers/myPrayerJournal/src/api/data"
+	"github.com/julienschmidt/httprouter"
+)
+
+/* Support */
+
+// Set the content type, the HTTP error code, and return the error message.
+func sendError(w http.ResponseWriter, r *http.Request, err error) {
+	w.Header().Set("Content-Type", "application/json; encoding=UTF-8")
+	w.WriteHeader(http.StatusInternalServerError)
+	if err := json.NewEncoder(w).Encode(map[string]string{"error": err.Error()}); err != nil {
+		log.Print("Error creating error JSON: " + err.Error())
+	}
+}
+
+// Set the content type and return the JSON to the user.
+func sendJSON(w http.ResponseWriter, r *http.Request, result interface{}) {
+	w.Header().Set("Content-Type", "application/json; encoding=UTF-8")
+	w.WriteHeader(http.StatusOK)
+	if err := json.NewEncoder(w).Encode(map[string]interface{}{"data": result}); err != nil {
+		sendError(w, r, err)
+	}
+}
+
+/* Handlers */
+
+func journal(w http.ResponseWriter, r *http.Request, _ httprouter.Params, db *sql.DB) {
+	reqs := data.Journal(db, "TODO: get user ID")
+	if reqs == nil {
+		reqs = []data.JournalRequest{}
+	}
+	sendJSON(w, r, reqs)
+}

src/api/routes/router.go

@@ -0,0 +1,66 @@
+package routes
+
+import (
+	"database/sql"
+	"fmt"
+	"net/http"
+
+	auth0 "github.com/auth0-community/go-auth0"
+	"github.com/julienschmidt/httprouter"
+	jose "gopkg.in/square/go-jose.v2"
+)
+
+// AuthConfig contains the Auth0 configuration passed from the "auth" JSON object.
+type AuthConfig struct {
+	Domain       string `json:"domain"`
+	ClientID     string `json:"id"`
+	ClientSecret string `json:"secret"`
+}
+
+// DBHandler extends httprouter's handler with a DB instance
+type DBHandler func(http.ResponseWriter, *http.Request, httprouter.Params, *sql.DB)
+
+//type APIHandler func(http.ResponseWriter, *http.Request, httprouter.Params, *sql.DB, string)
+
+func withDB(next DBHandler, db *sql.DB) httprouter.Handle {
+	return func(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
+		next(w, r, p, db)
+	}
+}
+
+func withAuth(next DBHandler, cfg *AuthConfig) DBHandler {
+	return func(w http.ResponseWriter, r *http.Request, p httprouter.Params, db *sql.DB) {
+		secret := []byte(cfg.ClientSecret)
+		secretProvider := auth0.NewKeyProvider(secret)
+		audience := []string{"{YOUR-AUTH0-API-AUDIENCE}"}
+
+		configuration := auth0.NewConfiguration(secretProvider, audience, fmt.Sprintf("https://%s.auth0.com/", cfg.Domain), jose.HS256)
+		validator := auth0.NewValidator(configuration)
+
+		token, err := validator.ValidateRequest(r)
+
+		if err != nil {
+			fmt.Println(err)
+			fmt.Println("Token is not valid:", token)
+			w.WriteHeader(http.StatusUnauthorized)
+			w.Write([]byte("Unauthorized"))
+		} else {
+			// TODO pass the user ID (sub) along; this -> doesn't work | r.Header.Add("user-id", token.Claims("sub"))
+			next(w, r, p, db)
+		}
+	}
+
+}
+
+// NewRouter returns a configured router to handle all incoming requests.
+func NewRouter(db *sql.DB, cfg *AuthConfig) *httprouter.Router {
+	router := httprouter.New()
+	for _, route := range routes {
+		if route.IsPublic {
+			router.Handle(route.Method, route.Pattern, withDB(route.Func, db))
+		} else {
+			router.Handle(route.Method, route.Pattern, withDB(withAuth(route.Func, cfg), db))
+		}
+	}
+	return router
+}

src/api/routes/routes.go

@@ -1,64 +1,25 @@
 // Package routes contains endpoint handlers for the myPrayerJournal API.
 package routes
 
-import (
-	"database/sql"
-	"encoding/json"
-	"log"
-	"net/http"
-
-	"github.com/danieljsummers/myPrayerJournal/src/api/data"
-	"github.com/julienschmidt/httprouter"
-)
-
-/* Support */
-
-// Set the content type, the HTTP error code, and return the error message.
-func sendError(w http.ResponseWriter, r *http.Request, err error) {
-	m := map[string]string{"error": err.Error()}
-	j, jErr := json.Marshal(m)
-	if jErr != nil {
-		log.Print("Error creating error JSON: " + jErr.Error())
-	}
-	w.WriteHeader(500)
-	w.Header().Set("Content-Type", "application/json")
-	w.Write(j)
+// Route is a route served in the application.
+type Route struct {
+	Name     string
+	Method   string
+	Pattern  string
+	Func     DBHandler
+	IsPublic bool
 }
 
-// Set the content type and return the JSON to the user.
-func sendJSON(w http.ResponseWriter, r *http.Request, result interface{}) {
-	payload, err := json.Marshal(result)
-	if err != nil {
-		sendError(w, r, err)
-		return
-	}
-	w.Header().Set("Content-Type", "application/json")
-	w.Write([]byte("{ data: "))
-	w.Write(payload)
-	w.Write([]byte(" }"))
-}
-
-/* Handlers */
-
-func journal(w http.ResponseWriter, r *http.Request, _ httprouter.Params, db *sql.DB) {
-	reqs := data.Journal(db, "TODO: get user ID")
-	if reqs == nil {
-		reqs = []data.JournalRequest{}
-	}
-	sendJSON(w, r, reqs)
-}
-
-/* Wrappers */
-
-func withDB(fn func(w http.ResponseWriter, r *http.Request, p httprouter.Params, db *sql.DB), db *sql.DB) httprouter.Handle {
-	return func(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
-		fn(w, r, p, db)
-	}
-}
-
-// Routes returns a configured router to handle all incoming requests.
-func Routes(db *sql.DB) *httprouter.Router {
-	router := httprouter.New()
-	router.GET("/journal", withDB(journal, db))
-	return router
+// Routes is the collection of all routes served in the application.
+type Routes []Route
+
+// routes is the actual list of routes for the application.
+var routes = Routes{
+	Route{
+		"Journal",
+		"GET",
+		"/journal",
+		journal,
+		false,
+	},
 }

src/my-prayer-journal.go

@@ -2,17 +2,48 @@
 package main
 
 import (
+	"encoding/json"
 	"log"
+	"net/http"
+	"os"
 
 	"github.com/danieljsummers/myPrayerJournal/src/api/data"
 	"github.com/danieljsummers/myPrayerJournal/src/api/routes"
 )
 
+// Web contains configuration for the web server.
+type Web struct {
+	Port string `json:"port"`
+}
+
+// Settings contains configuration for the myPrayerJournal API.
+type Settings struct {
+	Data *data.Settings     `json:"data"`
+	Web  *Web               `json:"web"`
+	Auth *routes.AuthConfig `json:"auth"`
+}
+
+// readSettings parses the JSON configuration file into the Settings struct.
+func readSettings(f string) *Settings {
+	config, err := os.Open(f)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer config.Close()
+	parser := json.NewDecoder(config)
+	settings := Settings{}
+	if err = parser.Decode(&settings); err != nil {
+		log.Fatal(err)
+	}
+	return &settings
+}
+
 func main() {
-	db, ok := data.Connect(&data.Settings{})
+	cfg := readSettings("config.json")
+	db, ok := data.Connect(cfg.Data)
 	if !ok {
 		log.Fatal("Unable to connect to database; exiting")
 	}
-	router := routes.Routes(db)
-	_ = router // TODO: remove
+	log.Printf("myPrayerJournal API listening on %s", cfg.Web.Port)
+	log.Fatal(http.ListenAndServe(cfg.Web.Port, routes.NewRouter(db, cfg.Auth)))
 }