neale/moth
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moth
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Working cache support

This commit is contained in:
John Donaldson 2019-10-25 23:53:40 +01:00
parent 0e54a6f9f5
commit 95bcc860e0
8 changed files with 197 additions and 14 deletions
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53
src/handlers.go
View File

@ -10,7 +10,9 @@ import (
"log"
"net/http"
"os"
"path"
"path/filepath"
"regexp"
"strconv"
"strings"
)
@ -265,15 +267,16 @@ func (ctx *Instance) dehydrateHandler(w http.ResponseWriter, req *http.Request)
zipWriter := zip.NewWriter( buf )
// Package up important JSON endpoints
writeZipContents(zipWriter, fmt.Sprintf("%s/%s", zipBaseDir, "puzzles.json"), ctx.jPuzzleList)
writeZipContents(zipWriter, fmt.Sprintf("%s/%s", zipBaseDir, "points.json"), ctx.jPointsLog)
// Package up files for currently-unlocked puzzles in categories
for category_name, category := range ctx.categories {
for _, file := range category.zf.File {
parts := strings.Split(file.Name, "/")
if (parts[0] == "content") {
fmt.Printf("Inspecting %s/%s\n", category_name, file.Name)
local_buf := new(bytes.Buffer)
fh, _ := file.Open()
defer fh.Close()
@ -283,17 +286,21 @@ func (ctx *Instance) dehydrateHandler(w http.ResponseWriter, req *http.Request)
}
}
// Pack up the theme files
theme_root_re := regexp.MustCompile(fmt.Sprintf("^%s", ctx.ThemeDir))
filepath.Walk(ctx.ThemeDir, func (path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if ! info.IsDir() {
fmt.Printf("Walking %s\n", path)
if ! info.IsDir() { // Only package up files
local_buf := new(bytes.Buffer)
fh, _ := os.Open(path)
defer fh.Close()
local_buf.ReadFrom(fh)
writeZipContents(zipWriter, fmt.Sprintf("%s/%s", zipBaseDir, path), local_buf.Bytes())
localized_path := theme_root_re.ReplaceAllLiteralString( path, "")
fmt.Printf("Localized path is %s\n", localized_path)
writeZipContents(zipWriter, fmt.Sprintf("%s/%s", zipBaseDir, localized_path), local_buf.Bytes())
}
return nil
})
@ -305,7 +312,44 @@ func (ctx *Instance) dehydrateHandler(w http.ResponseWriter, req *http.Request)
w.Write(buf.Bytes())
}
func (ctx *Instance) manifestHandler(w http.ResponseWriter, req *http.Request) {
manifest := make([]string, 0)
manifest = append(manifest, "puzzles.json")
manifest = append(manifest, "points.json")
// Pack up the theme files
theme_root_re := regexp.MustCompile(fmt.Sprintf("^%s/", ctx.ThemeDir))
filepath.Walk(ctx.ThemeDir, func (path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if ! info.IsDir() { // Only package up files
localized_path := theme_root_re.ReplaceAllLiteralString( path, "")
manifest = append(manifest, localized_path)
}
return nil
})
// Package up files for currently-unlocked puzzles in categories
for category_name, category := range ctx.categories {
for _, file := range category.zf.File {
parts := strings.Split(file.Name, "/")
if (parts[0] == "content") {
manifest = append(manifest, path.Join("content", category_name, path.Join(parts[1:]...)))
}
}
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
manifest_json, _ := json.Marshal(manifest)
w.Write(manifest_json)
}
func writeZipContents(z *zip.Writer, path string, contents []byte) error {
path = filepath.Clean(path)
fmt.Printf("Writing contents to %s\n", path)
f, err := z.Create(path)
if err != nil {
return err
@ -357,5 +401,6 @@ func (ctx *Instance) BindHandlers() {
ctx.mux.HandleFunc(ctx.Base+"/content/", ctx.contentHandler)
ctx.mux.HandleFunc(ctx.Base+"/puzzles.json", ctx.puzzlesHandler)
ctx.mux.HandleFunc(ctx.Base+"/points.json", ctx.pointsHandler)
ctx.mux.HandleFunc(ctx.Base+"/state_manifest.json", ctx.manifestHandler)
ctx.mux.HandleFunc(ctx.Base+"/dehydrate", ctx.dehydrateHandler)
}

2
theme/index.html
View File

@ -5,7 +5,9 @@
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<link rel="stylesheet" href="basic.css">
<script src="moth-pwa.js" type="text/javascript"></script>
<script src="moth.js"></script>
<link rel="manifest" href="manifest.json">
</head>
<body>
<h1 id="title">MOTH</h1>

9
theme/manifest.json Normal file
View File

@ -0,0 +1,9 @@
{
"name": "Monarch of the Hill",
"short_name": "MOTH",
"start_url": ".",
"display": "standalone",
"background_color": "#fff",
"theme_color": "#ECB",
"description": "The MOTH CTF engine"
}

18
theme/moth-pwa.js Normal file
View File

@ -0,0 +1,18 @@
function pwa_init() {
console.log("Starting service worker");
if ('serviceWorker' in navigator) {
navigator.serviceWorker.register("./sw.js").then(function(reg) {
console.log("Successfully registered service worker", reg);
}).catch(function(err) {
console.warn("Error while registering service worker", err);
});
} else {
console.log("Service workers not supported. Some offline functionality may not work");
}
}
if (document.readyState === "loading") {
document.addEventListener("DOMContentLoaded", pwa_init);
} else {
pwa_init();
}

70
theme/moth.js
View File

@ -78,12 +78,7 @@ function renderPuzzles(obj) {
}
function heartbeat(teamId) {
let fd = new FormData()
fd.append("id", teamId)
fetch("puzzles.json", {
method: "POST",
body: fd,
})
fetch("puzzles.json?id=" + teamId)
.then(resp => {
if (resp.ok) {
resp.json()
@ -110,6 +105,68 @@ function showPuzzles(teamId) {
document.getElementById("puzzles").appendChild(spinner)
heartbeat(teamId)
setInterval(e => { heartbeat(teamId) }, 40000)
let cacher = document.createElement("li");
let cache_button = document.createElement("a");
cache_button.innerText = "Cache";
cache_button.title = "Cache an offine copy of current content";
cache_button.href = "#";
cache_button.addEventListener("click", async function() {
toast("Caching all currently-open content");
await fetchAll(teamId);
toast("Done caching content");
});
cacher.appendChild(cache_button);
document.getElementsByTagName("nav")[0].getElementsByTagName("ul")[0].appendChild(cacher);
}
async function fetchAll(teamId) {
let headers = new Headers();
headers.append("pragma", "no-cache");
headers.append("cache-control", "no-cache");
requests = [];
requests.push( fetch("state_manifest.json?id=" + teamId, {headers: headers})
.then( resp => {
if (resp.ok) {
resp.json()
.then( contents => {
console.log("Processing manifest");
for (let resource of contents) {
if (resource == "puzzles.json") {
continue;
}
fetch(resource, {headers: headers})
.then( e => {
console.log("Fetched " + resource);
})
}
})
}
}));
let resp = await fetch("puzzles.json?id=" + teamId, {headers: headers});
if (resp.ok) {
let categories = await resp.json();
let cat_names = Object.keys(categories)
cat_names.sort()
for (let cat_name of cat_names) {
if (cat_name.startsWith("__")) {
// Skip metadata
continue
}
let puzzles = categories[cat_name];
for (let puzzle of puzzles) {
let url = "puzzle.html?cat=" + cat_name + "&points=" + puzzle[0] + "&pid=" + puzzle[1];
requests.push( fetch(url, {headers: headers})
.then( e => {
console.log("Fetched " + url);
}));
}
}
}
return Promise.all(requests);
}
function login(e) {
@ -165,3 +222,4 @@ if (document.readyState === "loading") {
} else {
init();
}

1
theme/puzzle.html
View File

@ -5,6 +5,7 @@
<link rel="stylesheet" href="basic.css">
<meta name="viewport" content="width=device-width">
<meta charset="utf-8">
<script src="moth-pwa.js" type="text/javascript"></script>
<script src="puzzle.js"></script>
<script>

5
theme/scoreboard.html
View File

@ -4,6 +4,7 @@
<title>Scoreboard</title>
<link rel="stylesheet" href="basic.css">
<meta name="viewport" content="width=device-width">
<script src="moth-pwa.js" type="text/javascript"></script>
<script>
function update(state) {
let element = document.getElementById("scoreboard");
@ -111,8 +112,8 @@ function once() {
}
function init() {
let base = window.location.href.replace("scoreboard.html", "")
document.querySelector("#location").textContent = base
let base = window.location.href.replace("scoreboard.html", "");
document.querySelector("#location").textContent = base;
setInterval(once, 60000);
once();

49
theme/sw.js Normal file
View File

@ -0,0 +1,49 @@
var cacheName = "moth:v1"
var content = [
"index.html",
"basic.css",
"puzzle.js",
"puzzle.html",
"scoreboard.html",
"moth.js",
"sw.js",
"points.json",
];
self.addEventListener("install", function(e) {
e.waitUntil(
caches.open(cacheName).then(function(cache) {
return cache.addAll(content).then(
function() {
self.skipWaiting();
});
})
);
});
/* Attempt to fetch live resources, first, then fall back to cache */
self.addEventListener('fetch', function(event) {
let cache_used = false;
event.respondWith(
fetch(event.request)
.catch(function(evt) {
console.log("Falling back to cache for " + event.request.url);
cache_used = true;
return caches.match(event.request, {ignoreSearch: true});
}).then(function(res) {
if (res && res.ok) {
let res_clone = res.clone();
if (! cache_used ) {
caches.open(cacheName).then(function(cache) {
cache.put(event.request, res_clone);
console.log("Storing " + event.request.url + " in cache");
});
}
return res;
} else {
console.log("Failed to retrieve resource");
}
})
);
});