400 favico request and parameterize pollId

server.go

@@ -7,6 +7,7 @@ import (
 	"html/template"
 	"log"
 	"net/http"
+	"strconv"
 
 	_ "github.com/mattn/go-sqlite3"
 )
@@ -71,22 +72,34 @@ func prepareStaticContent() {
 }
 
 func handleGetRoot(w http.ResponseWriter, r *http.Request) {
-	var pollId = r.PathValue("pollId")
 	var pollName string
+	pollId, err := strconv.Atoi(r.PathValue("pollId"))
+	if err != nil {
+		log.Printf("[!] Invallid poll id url segment, error: %s\n", err)
+		http.Error(w, "Poll not found", http.StatusBadRequest)
+		return
+	}
+
 	const query = `
 		SELECT name
 		FROM polls
 		WHERE id = ?;
 	`
 
-	err := db.QueryRow(query, pollId).Scan(&pollName)
+	err = db.QueryRow(query, pollId).Scan(&pollName)
 	if err != nil {
-		log.Printf("[!] No poll with id %s was found, error: %s\n", pollId, err)
+		log.Printf("[!] No poll with id %d was found, error: %s\n", pollId, err)
 		http.Error(w, "Poll not found", http.StatusBadRequest)
 		return
 	}
 
-	err = indexHtmlTemplate.Execute(w, struct{ PollName string }{PollName: pollName})
+	err = indexHtmlTemplate.Execute(w, struct {
+		PollId   int
+		PollName string
+	}{
+		PollId:   pollId,
+		PollName: pollName,
+	})
 	if err != nil {
 		log.Printf("[!] Could not execute index.html template, error: %s\n", err)
 		http.Error(w, "Error rendering template", http.StatusInternalServerError)
@@ -112,6 +125,7 @@ func handlePostSubmit(w http.ResponseWriter, r *http.Request) {
 	if err != nil {
 		log.Printf("[!] Error decoding request Body %v, error: %s\n", r.Body, err)
 		w.WriteHeader(http.StatusBadRequest)
+		return
 	}
 
 	choicesJson, err := json.Marshal(choicesPost.Choices)
@@ -164,6 +178,13 @@ func main() {
 		handleGetPing,
 	)
 
+	http.HandleFunc(
+		"GET /favicon.ico",
+		func(w http.ResponseWriter, r *http.Request) {
+			http.Error(w, "There is no favicon.ico!", http.StatusBadRequest)
+		},
+	)
+
 	http.HandleFunc(
 		"GET /{pollId}",
 		handleGetRoot,

static/index.html.tmpl

@@ -115,7 +115,7 @@
                 headers: {
                     "Content-Type": "application/json", // Inform the server about the data format
                 },
-                body: JSON.stringify({pollId: 1, username: submitName.value, choices: choices}), // Convert the data to JSON string
+                body: JSON.stringify({pollId: {{ .PollId }}, username: submitName.value, choices: choices}), // Convert the data to JSON string
             })
             /*
                 .then(response => {