mort
/
pipic
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Merge branch 'master' of http://git.mort.coffee/mort/pipic

master
mortie 7 years ago
parent
2f6ce4c1f4 6dd8fb81e0
commit
93663d64a2
5 changed files with 733 additions and 52 deletions
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  1. 33
    0
      README.md
  2. 1
    0
      conf.json.example
  3. 108
    13
      index.html
  4. 438
    0
      polyfills.js
  5. 153
    39
      server.js

+ 33
- 0
README.md View File

@@ -0,0 +1,33 @@
# Pipic

Pipic is software for making slideshows. The idea is that you have one server,
running a pipic server, and have as many clients as necessary which just
display the website hosted by the pipic server.

## Usage

1. Copy `conf.json.example` to `conf.json`, and change the desired preferences.
You may for example want to change `slides` to something other than
'exampleSlides'.
2. Run `node server.js`.
3. Point your clients to the site hosted by the pipic server.

## Automatic fullscreen

There are multiple ways for a client to automatically display the website in
fullscreen.

### Firefox

The easiest way for Firefox is to go to about:config and change
`full-screen-api.allow-trusted-requests-only` to false, and the website will
automatically fullscreen itself. You could also change
`full-screen-api.warning.timeout` to 0 to disable the warning telling you the
website is fullscreen.

### Chrome/Chromium

You could start Chrome/Chromium with the `--start-fullscreen` flag, and the
browser will automatically start in fullscreen mode. For some reason, Chrome
seems to have issues when started from a plain X session without a window
manager though, so I would advise using Firefox.

+ 1
- 0
conf.json.example View File

@@ -1,5 +1,6 @@
{
"slides": "exampleSlides",
"transition_time": 1,
"interval": 5000,
"port": 8080
}

+ 108
- 13
index.html View File

@@ -2,44 +2,73 @@
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Slides</title>
<style>
* {
-moz-user-select: none;
-ms-user-select: none;
-webkit-user-select: none;
user-select: none;
cursor: none;
}
html, body {
margin: 0px;
padding: 0px;
height: 100%;
overflow: hidden;
font-size: 2em;

font-family: sans-serif;
}

#_overlay {
z-index: 2;
will-change: opacity;
}
#_main {
z-index: 1;
}
#_msg {
z-index: 3;
position: absolute;
top: 6px;
right: 6px;
backgrounud: white;
display: none;
font-size: 15px;
}
#_msg.active {
display: block;
}

._content {
background: white;
position: absolute;
width: 100%;
height: 100%;
top: 0px;
top: 0%;
left: 0px;

display: flex;
align-items: center;
justify-content: center;
}

._content {
._content ._wrapper {
display: inline-block;
text-align: center;
}

._content h1 { font-size: 5em }
._content h2 { font-size: 4.5em }
._content h3 { font-size: 4em }
._content h1 { font-size: 2em }
._content h2 { font-size: 1.4em }
._content h3 { font-size: 1.2em }

._content p { font-size: 2.2em }

._content .fullscreen {
position: absolute;
width: auto;
width: 100%;
height: 100%;
top: 0px;
left: 50%;
@@ -48,23 +77,58 @@
-webkit-transform: translateX(-50%);
transform: translateX(-50%);
}
._content img.fullscreen {
width: auto;
}
._content img.fullscreen.stretch {
width: 100%;
}

._content p,
._content ul,
._content ol {
text-align: left;
line-height: 1.3em;
}

#_overlay {
transition: opacity 1s;
transition: opacity <<transition_time>>s, transform <<transition_time>>s;
opacity: 1;
}
#_overlay.hidden {
opacity: 0;
transform: scale(1.1);
}
</style>
</head>
<body>
<div id="_main" class="_content"></div>
<div id="_overlay" class="_content"></div>
<div id="_msg"></div>

<!-- Fetch polyfill -->
<script src="/polyfills.js"></script>

<script>
(function fullscreen() {
var elem = document.body;
var rFS = elem.requestFullScreen ||
elem.msRequestFullScreen ||
elem.mozRequestFullScreen ||
elem.webkitRequestFullScreen;

if (rFS)
rFS.call(elem);
})();

var overlay = () => document.querySelector("#_overlay");
var main = () => document.querySelector("#_main");
var msg = () => document.querySelector("#_msg");

function message(str) {
msg().innerHTML = str;
msg().className = "active";
}

// Swap the IDs of two elements
function swap(elem1, elem2) {
@@ -74,7 +138,7 @@
}

// Change slides with a transition
function update() {
function update(name) {
overlay().innerHTML = "";
overlay().className = "_content";
swap(main(), overlay());
@@ -82,20 +146,51 @@
fetch("/slide")
.then(response => response.text())
.then(text => {
history.replaceState({}, "", "/"+name+"/");
main().innerHTML = "<div class='_wrapper'>"+text+"</div>";
setTimeout(() => {
main().innerHTML = text;
overlay().className = "_content hidden";
}, 1000);
})
.catch(err => console.error(err));
}

function reload() {
message("Server down, waiting");
var i = setInterval(() => {
fetch("/")
.then(() => {
history.replaceState({}, "", "/");
location.reload();
})
.catch(() => {});
}, 1000);
}

function await() {
// Wait for the next slide change, then update again
fetch("/await")
.then(response => update())
.catch(err => { console.error(err); update(); });
console.log("fetching");
fetch("/await", { method: "POST" })
.then(response => response.json())
.then(obj => {
console.log("fetched", JSON.stringify(obj));
if (obj.evt === "next") {
update(obj.args.name);
} else if (obj.evt === "reload") {
return reload();
} else {
console.log("Unknown event: "+obj.evt);
}
await();
})
.catch(err => { console.error(err); await(); });
}

update();
await();

fetch("/init")
.then(response => response.text())
.then(name => update(name));
</script>
</body>
</html>

+ 438
- 0
polyfills.js View File

@@ -0,0 +1,438 @@

/*
* Fetch
* https://github.com/github/fetch
*/
(function(self) {
'use strict';

if (self.fetch) {
return
}

var support = {
searchParams: 'URLSearchParams' in self,
iterable: 'Symbol' in self && 'iterator' in Symbol,
blob: 'FileReader' in self && 'Blob' in self && (function() {
try {
new Blob()
return true
} catch(e) {
return false
}
})(),
formData: 'FormData' in self,
arrayBuffer: 'ArrayBuffer' in self
}

function normalizeName(name) {
if (typeof name !== 'string') {
name = String(name)
}
if (/[^a-z0-9\-#$%&'*+.\^_`|~]/i.test(name)) {
throw new TypeError('Invalid character in header field name')
}
return name.toLowerCase()
}

function normalizeValue(value) {
if (typeof value !== 'string') {
value = String(value)
}
return value
}

// Build a destructive iterator for the value list
function iteratorFor(items) {
var iterator = {
next: function() {
var value = items.shift()
return {done: value === undefined, value: value}
}
}

if (support.iterable) {
iterator[Symbol.iterator] = function() {
return iterator
}
}

return iterator
}

function Headers(headers) {
this.map = {}

if (headers instanceof Headers) {
headers.forEach(function(value, name) {
this.append(name, value)
}, this)

} else if (headers) {
Object.getOwnPropertyNames(headers).forEach(function(name) {
this.append(name, headers[name])
}, this)
}
}

Headers.prototype.append = function(name, value) {
name = normalizeName(name)
value = normalizeValue(value)
var list = this.map[name]
if (!list) {
list = []
this.map[name] = list
}
list.push(value)
}

Headers.prototype['delete'] = function(name) {
delete this.map[normalizeName(name)]
}

Headers.prototype.get = function(name) {
var values = this.map[normalizeName(name)]
return values ? values[0] : null
}

Headers.prototype.getAll = function(name) {
return this.map[normalizeName(name)] || []
}

Headers.prototype.has = function(name) {
return this.map.hasOwnProperty(normalizeName(name))
}

Headers.prototype.set = function(name, value) {
this.map[normalizeName(name)] = [normalizeValue(value)]
}

Headers.prototype.forEach = function(callback, thisArg) {
Object.getOwnPropertyNames(this.map).forEach(function(name) {
this.map[name].forEach(function(value) {
callback.call(thisArg, value, name, this)
}, this)
}, this)
}

Headers.prototype.keys = function() {
var items = []
this.forEach(function(value, name) { items.push(name) })
return iteratorFor(items)
}

Headers.prototype.values = function() {
var items = []
this.forEach(function(value) { items.push(value) })
return iteratorFor(items)
}

Headers.prototype.entries = function() {
var items = []
this.forEach(function(value, name) { items.push([name, value]) })
return iteratorFor(items)
}

if (support.iterable) {
Headers.prototype[Symbol.iterator] = Headers.prototype.entries
}

function consumed(body) {
if (body.bodyUsed) {
return Promise.reject(new TypeError('Already read'))
}
body.bodyUsed = true
}

function fileReaderReady(reader) {
return new Promise(function(resolve, reject) {
reader.onload = function() {
resolve(reader.result)
}
reader.onerror = function() {
reject(reader.error)
}
})
}

function readBlobAsArrayBuffer(blob) {
var reader = new FileReader()
reader.readAsArrayBuffer(blob)
return fileReaderReady(reader)
}

function readBlobAsText(blob) {
var reader = new FileReader()
reader.readAsText(blob)
return fileReaderReady(reader)
}

function Body() {
this.bodyUsed = false

this._initBody = function(body) {
this._bodyInit = body
if (typeof body === 'string') {
this._bodyText = body
} else if (support.blob && Blob.prototype.isPrototypeOf(body)) {
this._bodyBlob = body
} else if (support.formData && FormData.prototype.isPrototypeOf(body)) {
this._bodyFormData = body
} else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
this._bodyText = body.toString()
} else if (!body) {
this._bodyText = ''
} else if (support.arrayBuffer && ArrayBuffer.prototype.isPrototypeOf(body)) {
// Only support ArrayBuffers for POST method.
// Receiving ArrayBuffers happens via Blobs, instead.
} else {
throw new Error('unsupported BodyInit type')
}

if (!this.headers.get('content-type')) {
if (typeof body === 'string') {
this.headers.set('content-type', 'text/plain;charset=UTF-8')
} else if (this._bodyBlob && this._bodyBlob.type) {
this.headers.set('content-type', this._bodyBlob.type)
} else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
this.headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8')
}
}
}

if (support.blob) {
this.blob = function() {
var rejected = consumed(this)
if (rejected) {
return rejected
}

if (this._bodyBlob) {
return Promise.resolve(this._bodyBlob)
} else if (this._bodyFormData) {
throw new Error('could not read FormData body as blob')
} else {
return Promise.resolve(new Blob([this._bodyText]))
}
}

this.arrayBuffer = function() {
return this.blob().then(readBlobAsArrayBuffer)
}

this.text = function() {
var rejected = consumed(this)
if (rejected) {
return rejected
}

if (this._bodyBlob) {
return readBlobAsText(this._bodyBlob)
} else if (this._bodyFormData) {
throw new Error('could not read FormData body as text')
} else {
return Promise.resolve(this._bodyText)
}
}
} else {
this.text = function() {
var rejected = consumed(this)
return rejected ? rejected : Promise.resolve(this._bodyText)
}
}

if (support.formData) {
this.formData = function() {
return this.text().then(decode)
}
}

this.json = function() {
return this.text().then(JSON.parse)
}

return this
}

// HTTP methods whose capitalization should be normalized
var methods = ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT']

function normalizeMethod(method) {
var upcased = method.toUpperCase()
return (methods.indexOf(upcased) > -1) ? upcased : method
}

function Request(input, options) {
options = options || {}
var body = options.body
if (Request.prototype.isPrototypeOf(input)) {
if (input.bodyUsed) {
throw new TypeError('Already read')
}
this.url = input.url
this.credentials = input.credentials
if (!options.headers) {
this.headers = new Headers(input.headers)
}
this.method = input.method
this.mode = input.mode
if (!body) {
body = input._bodyInit
input.bodyUsed = true
}
} else {
this.url = input
}

this.credentials = options.credentials || this.credentials || 'omit'
if (options.headers || !this.headers) {
this.headers = new Headers(options.headers)
}
this.method = normalizeMethod(options.method || this.method || 'GET')
this.mode = options.mode || this.mode || null
this.referrer = null

if ((this.method === 'GET' || this.method === 'HEAD') && body) {
throw new TypeError('Body not allowed for GET or HEAD requests')
}
this._initBody(body)
}

Request.prototype.clone = function() {
return new Request(this)
}

function decode(body) {
var form = new FormData()
body.trim().split('&').forEach(function(bytes) {
if (bytes) {
var split = bytes.split('=')
var name = split.shift().replace(/\+/g, ' ')
var value = split.join('=').replace(/\+/g, ' ')
form.append(decodeURIComponent(name), decodeURIComponent(value))
}
})
return form
}

function headers(xhr) {
var head = new Headers()
var pairs = (xhr.getAllResponseHeaders() || '').trim().split('\n')
pairs.forEach(function(header) {
var split = header.trim().split(':')
var key = split.shift().trim()
var value = split.join(':').trim()
head.append(key, value)
})
return head
}

Body.call(Request.prototype)

function Response(bodyInit, options) {
if (!options) {
options = {}
}

this.type = 'default'
this.status = options.status
this.ok = this.status >= 200 && this.status < 300
this.statusText = options.statusText
this.headers = options.headers instanceof Headers ? options.headers : new Headers(options.headers)
this.url = options.url || ''
this._initBody(bodyInit)
}

Body.call(Response.prototype)

Response.prototype.clone = function() {
return new Response(this._bodyInit, {
status: this.status,
statusText: this.statusText,
headers: new Headers(this.headers),
url: this.url
})
}

Response.error = function() {
var response = new Response(null, {status: 0, statusText: ''})
response.type = 'error'
return response
}

var redirectStatuses = [301, 302, 303, 307, 308]

Response.redirect = function(url, status) {
if (redirectStatuses.indexOf(status) === -1) {
throw new RangeError('Invalid status code')
}

return new Response(null, {status: status, headers: {location: url}})
}

self.Headers = Headers
self.Request = Request
self.Response = Response

self.fetch = function(input, init) {
return new Promise(function(resolve, reject) {
var request
if (Request.prototype.isPrototypeOf(input) && !init) {
request = input
} else {
request = new Request(input, init)
}

var xhr = new XMLHttpRequest()

function responseURL() {
if ('responseURL' in xhr) {
return xhr.responseURL
}

// Avoid security warnings on getResponseHeader when not allowed by CORS
if (/^X-Request-URL:/m.test(xhr.getAllResponseHeaders())) {
return xhr.getResponseHeader('X-Request-URL')
}

return
}

xhr.onload = function() {
var options = {
status: xhr.status,
statusText: xhr.statusText,
headers: headers(xhr),
url: responseURL()
}
var body = 'response' in xhr ? xhr.response : xhr.responseText
resolve(new Response(body, options))
}

xhr.onerror = function() {
reject(new TypeError('Network request failed'))
}

xhr.ontimeout = function() {
reject(new TypeError('Network request failed'))
}

xhr.open(request.method, request.url, true)

if (request.credentials === 'include') {
xhr.withCredentials = true
}

if ('responseType' in xhr && support.blob) {
xhr.responseType = 'blob'
}

request.headers.forEach(function(value, name) {
xhr.setRequestHeader(name, value)
})

xhr.send(typeof request._bodyInit === 'undefined' ? null : request._bodyInit)
})
}
self.fetch.polyfill = true
})(typeof self !== 'undefined' ? self : this);

+ 153
- 39
server.js View File

@@ -4,40 +4,91 @@ var crypto = require("crypto");
var pathlib = require("path");
var urllib = require("url");

var index = fs.readFileSync("index.html");
var conf = JSON.parse(fs.readFileSync("conf.json"));
var index = fs.readFileSync("index.html", "utf-8")
.replace(/<<transition_time>>/g, conf.transition_time);

function error(res, err) {
console.trace(err);
res.end(err.toString());
}

function mimetype(path) {
var ext = pathlib.extname(path)
.substring(1)
.toLowerCase();

switch (ext) {

case "html":
case "xml":
return "text/"+ext;

case "png":
case "jpg":
case "jpeg":
case "gif":
return "image/"+ext;

case "svg":
return "image/svg+xml";

case "mov":
case "mp4":
case "ogv":
case "webm":
return "video/"+ext;

case "mp3":
case "ogg":
case "flac":
case "m4a":
return "audio/"+ext;

default:
return "application/octet-stream";
}
}

function sendfile(res, path) {
res.writeHead(200, {
"content-type": mimetype(path)
});

fs.createReadStream(path)
.on("error", err => error(res, err))
.pipe(res);
}

// The individual slide
function Slide(dir) {
var self = {};

self.dir = dir;
self.name = pathlib.parse(dir).name;

function serve(parts, res) {
if (parts.pathname === "/slide") {
fs.createReadStream(pathlib.join(dir, "index.html"))
.on("error", err => error(res, err))
.pipe(res);
} else {
fs.createReadStream(pathlib.join(dir, parts.pathname))
.on("error", err => error(res, err))
.pipe(res);
self.serveSlide = function(parts, res) {
sendfile(res, pathlib.join(dir, "index.html"));
}

self.serveFiles = function(parts, res) {

// Redirect to / if /{name} is requested
if (parts.pathname.replace(/\//g, "") === self.name) {
res.writeHead(302, { location: "/" });
return res.end();
}

var name = parts.pathname.substring(1).replace(self.name, "");
sendfile(res, pathlib.join(dir, name));
}

self.serve = function(parts, res) {
self.indexExists = function() {
try {
serve(parts, res);
fs.accessSync(pathlib.join(dir, "index.html"));
return true;
} catch (err) {
if (err.code && err.code === "ENOENT")
res.writeHead(404);

error(res, err);
return false;
}
}

@@ -51,6 +102,15 @@ function Slideshow(dir, changeInterval) {

var currentSlide = null;
var awaiters = [];
var slides = [];
var slideIndex = 0;
var nextTimeout;

self.sendEvent = function(evt, args) {
var str = JSON.stringify({ evt: evt, args: args });
awaiters.forEach(res => res.end(str));
awaiters = [];
}

self.serve = function(req, res) {
var parts = urllib.parse(req.url);
@@ -59,44 +119,81 @@ function Slideshow(dir, changeInterval) {
if (parts.pathname === "/") {
res.end(index);

// /polyfills.js: JavaScript polyfills
} else if (parts.pathname === "/polyfills.js") {
fs.createReadStream("polyfills.js")
.pipe(res)
.on("error", err => res.end(err.toString()));

// /init: send initial information about current slide
} else if (parts.pathname === "/init") {
res.end(currentSlide ? currentSlide.name : "");

// /await: long polling, request won't end before a new slide comes
} else if (parts.pathname === "/await") {
awaiters.push(res);

// There's a current slide: leave serving files up to the slide
} else if (currentSlide) {
currentSlide.serve(parts, res);
// /slide: serve the current slide's html
} else if (parts.pathname === "/slide" && currentSlide) {
currentSlide.serveSlide(parts, res);

// There's no current slide show
// Serve other files
} else {
res.end("No current slideshow.");
var served = false;

for (var slide of slides) {

// If client requests /{slide-name}/*
if (slide.name === parts.pathname.substr(1, slide.name.length)) {
slide.serveFiles(parts, res);
served = true;
break;
}
}

if (!served) {
res.writeHead(404);
res.end("404");
}
}
}

function next() {
slideIndex += 1;

// Go to the next slide, or restart
if ((slideIndex >= slides.length)) {
clearTimeout(nextTimeout);
init();
} else {
currentSlide = slides[slideIndex];
nextTimeout = setTimeout(next, changeInterval);
}

// End all awaiting connections to notify slide change,
if (currentSlide.indexExists()) {
self.sendEvent("next", { name: currentSlide.name });

// Or go to the next slide if the current one doesn't have an index.html
} else {
clearTimeout(nextTimeout);
setTimeout(next, 0);
}
}

self.next = next;

// This function starts the slideshow and goes through the slides
// one by one. When done, it starts again by calling this function again.
function init() {
var slides = fs.readdirSync(dir)
slides = fs.readdirSync(dir)
.sort()
.map(file => Slide(pathlib.join(dir, file)));

var slideIndex = 0;
slideIndex = 0;
currentSlide = slides[slideIndex];

var interval = setInterval(() => {
slideIndex += 1;

// Go to the next slide, or restart
if (slideIndex >= slides.length) {
clearInterval(interval);
init();
} else {
currentSlide = slides[slideIndex];
}

// End all awaiting connections to notify slide change
awaiters.forEach(res => res.end());
}, changeInterval);
nextTimeout = setTimeout(next, changeInterval);
}
init();

@@ -105,6 +202,23 @@ function Slideshow(dir, changeInterval) {

var slideshow = Slideshow(conf.slides, conf.interval);

http.createServer((req, res) => {
function onexit(code) {
console.log("exiting", code);
slideshow.sendEvent("reload");
process.exit();
}
process.on("exit", onexit);
process.on("SIGINT", onexit);
process.on("SIGTERM", onexit);

process.on("uncaughtException", onexit);

var server = http.createServer((req, res) => {
slideshow.serve(req, res);
}).listen(conf.port);
});
server.on("error", err => {
console.error(err);
system.exit(1);
});
server.listen(conf.port);
console.log("Server running on port "+conf.port+".");

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