Switch to pointers, add mtime check

handlers.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"html/template"
 	"log"
 	"math/rand"
@@ -10,9 +11,12 @@ import (
 
 // Serves the webpage created by createRoot()
 func root(writer http.ResponseWriter, request *http.Request) {
-	r := parseList()
+	if modify() {
+		r = parseList()
+		fmt.Println("Parsed the list again")
+	}
 	var table string
-	for _, member := range r {
+	for _, member := range *r {
 		table = table + "  <tr>\n"
 		table = table + "    <td>" + member.handle + "</td>\n"
 		table = table + "    <td>" + link(member.url) + "</td>\n"
@@ -30,49 +34,61 @@ func root(writer http.ResponseWriter, request *http.Request) {
 // Redirects the visitor to the next member, wrapping around the list if the
 // next would be out-of-bounds
 func next(writer http.ResponseWriter, request *http.Request) {
+	if modify() {
+		r = parseList()
+	}
 	host := request.URL.Query().Get("host")
-	dest := "https://"
-	list := parseList()
-	for i, item := range list {
+	dest, success := "https://", false
+	for i, item := range *r {
 		if item.url == host {
-			if i+1 >= len(list) {
-				dest = dest + list[0].url
+			if i+1 >= len(*r) {
+				dest = dest + (*r)[0].url
 				http.Redirect(writer, request, dest, 302)
+				success = true
 				break
 			}
-			dest = dest + list[i+1].url
+			dest = dest + (*r)[i+1].url
 			http.Redirect(writer, request, dest, 302)
+			success = true
 			break
 		}
 	}
-	http.Error(writer, "Ring member '"+host+"' not found.", 404)
+	if success == false {
+		http.Error(writer, "Ring member '"+host+"' not found.", 404)
+	}
 }
 
 // Redirects the visitor to the previous member, wrapping around the list if the
 // next would be out-of-bounds
 func previous(writer http.ResponseWriter, request *http.Request) {
+	if modify() {
+		r = parseList()
+	}
 	host := request.URL.Query().Get("host")
-	dest := "https://"
-	list := parseList()
-	for i, item := range list {
+	dest, success := "https://", false
+	for i, item := range *r {
 		if item.url == host {
 			if i-1 < 0 {
-				dest = dest + list[len(list)-1].url
+				dest = dest + (*r)[len(*r)-1].url
 				http.Redirect(writer, request, dest, 302)
 				break
 			}
-			dest = dest + list[i-1].url
+			dest = dest + (*r)[i-1].url
 			http.Redirect(writer, request, dest, 302)
 			break
 		}
 	}
-	http.Error(writer, "Ring member '"+host+"' not found.", 404)
+	if success == false {
+		http.Error(writer, "Ring member '"+host+"' not found.", 404)
+	}
 }
 
 // Redirects the visitor to a random member
 func random(writer http.ResponseWriter, request *http.Request) {
+	if modify() {
+		r = parseList()
+	}
 	rand.Seed(time.Now().Unix())
-	list := parseList()
-	dest := "https://" + list[rand.Intn(len(list)-1)].url
+	dest := "https://" + (*r)[rand.Intn(len(*r)-1)].url
 	http.Redirect(writer, request, dest, 302)
 }