lets-go:7.2 new route handler

snippetbox/cmd/web/handlers.go

@@ -6,15 +6,12 @@ import (
 	"net/http"
 	"strconv"
 
+	"github.com/julienschmidt/httprouter"
 	"snippetbox.chaosfem.tw/internal/models"
 )
 
 // home ...
 func (app *application) home(w http.ResponseWriter, r *http.Request) {
-	if r.URL.Path != "/" {
-		http.NotFound(w, r)
-		return
-	}
 	snippets, err := app.snippets.Latest()
 	if err != nil {
 		app.serverError(w, r, err)
@@ -29,7 +26,9 @@ func (app *application) home(w http.ResponseWriter, r *http.Request)  {
 
 // snippetView ...
 func (app *application) snippetView(w http.ResponseWriter, r *http.Request) {
-	id, err := strconv.Atoi(r.URL.Query().Get("id"))
+	params := httprouter.ParamsFromContext(r.Context())
+
+	id, err := strconv.Atoi(params.ByName("id"))
 	if err != nil || id < 1 {
 		app.notFound(w)
 		return
@@ -51,15 +50,13 @@ func (app *application) snippetView(w http.ResponseWriter, r *http.Request)  {
 	app.render(w, r, http.StatusOK, "view.tmpl", data)
 }
 
-// snippetCreate ...
+// (app *application) snippetCreate ...
 func (app *application) snippetCreate(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Allow", "POST")
-
-	if r.Method != http.MethodPost {
-		app.clientError(w, http.StatusMethodNotAllowed)
-		return
+	w.Write([]byte("Form for new snippet, plz?"))
 }
 
+// snippetCreatePost ...
+func (app *application) snippetCreatePost(w http.ResponseWriter, r *http.Request) {
 	title := "0 snail"
 	content := "0 snail\nClimb Mount Fuji,\nBut slowly, slowly!\n\n - Kobayashi Issa"
 	expires := 7
@@ -70,5 +67,5 @@ func (app *application) snippetCreate(w http.ResponseWriter, r *http.Request)  {
 		return
 	}
 
-	http.Redirect(w, r, fmt.Sprintf("/snippet/view?id=%d", id), http.StatusSeeOther)
+	http.Redirect(w, r, fmt.Sprintf("/snippet/view/%d", id), http.StatusSeeOther)
 }

snippetbox/cmd/web/routes.go

@@ -3,22 +3,24 @@ package main
 import (
 	"net/http"
 
+	"github.com/julienschmidt/httprouter"
 	"github.com/justinas/alice"
 )
 
 // routes ...
 func (app *application) routes() http.Handler {
-	mux := http.NewServeMux()
+	router := httprouter.New()
 
 	// setup server for static files
 	fileServer := http.FileServer(http.Dir("./ui/static"))
-	mux.Handle("/static/", http.StripPrefix("/static", fileServer))
+	router.Handler(http.MethodGet, "/static/*filepath", http.StripPrefix("/static", fileServer))
 
-	mux.HandleFunc("/", app.home)
-	mux.HandleFunc("/snippet/view", app.snippetView)
-	mux.HandleFunc("/snippet/create", app.snippetCreate)
+	router.HandlerFunc(http.MethodGet, "/", app.home)
+	router.HandlerFunc(http.MethodGet, "/snippet/view/:id", app.snippetView)
+	router.HandlerFunc(http.MethodGet, "/snippet/create", app.snippetCreate)
+	router.HandlerFunc(http.MethodPost, "/snippet/create", app.snippetCreatePost)
 
 	standard := alice.New(app.recoverPanic, app.logRequest, secureHeaders)
 
-	return standard.Then(mux)
+	return standard.Then(router)
 }

snippetbox/go.mod

@@ -4,5 +4,6 @@ go 1.21.4
 
 require (
 	github.com/go-sql-driver/mysql v1.7.1 // indirect
+	github.com/julienschmidt/httprouter v1.3.0 // indirect
 	github.com/justinas/alice v1.2.0 // indirect
 )

snippetbox/go.sum

@@ -1,4 +1,6 @@
 github.com/go-sql-driver/mysql v1.7.1 h1:lUIinVbN1DY0xBg0eMOzmmtGoHwWBbvnWubQUrtU8EI=
 github.com/go-sql-driver/mysql v1.7.1/go.mod h1:OXbVy3sEdcQ2Doequ6Z5BW6fXNQTmx+9S1MCJN5yJMI=
+github.com/julienschmidt/httprouter v1.3.0 h1:U0609e9tgbseu3rBINet9P48AI/D3oJs4dN7jwJOQ1U=
+github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
 github.com/justinas/alice v1.2.0 h1:+MHSA/vccVCF4Uq37S42jwlkvI2Xzl7zTPCN5BnZNVo=
 github.com/justinas/alice v1.2.0/go.mod h1:fN5HRH/reO/zrUflLfTN43t3vXvKzvZIENsNEe7i7qA=

snippetbox/ui/html/pages/home.tmpl

@@ -11,7 +11,7 @@
         </tr>
         {{range .Snippets}}
         <tr>
-          <td><a href='/snippet/view?id={{.ID}}'>{{.Title}}</td>
+          <td><a href='/snippet/view/{{.ID}}'>{{.Title}}</td>
           <td>{{humanDate .Created}}</td>
           <td>{{.ID}}</td>
         </tr>