From 423dc9403e031535fc6cc47df4efc47d2a85cb4d Mon Sep 17 00:00:00 2001
From: Neil Gershenfeld <gersh@cba.mit.edu>
Date: Tue, 26 Feb 2019 16:36:41 -0500
Subject: [PATCH] add auth
---
cast | 3 +++
screen.js | 12 +++++++++---
viewer.html | 29 ++++++++++++++++++++++++-----
3 files changed, 36 insertions(+), 8 deletions(-)
create mode 100755 cast
diff --git a/cast b/cast
new file mode 100755
index 0000000..4e6a28e
--- /dev/null
+++ b/cast
@@ -0,0 +1,3 @@
+#!/bin/bash
+cd ~/git/screen
+sudo node screen.js 80 10 10 1234
diff --git a/screen.js b/screen.js
index d7cf7d3..208d999 100644
--- a/screen.js
+++ b/screen.js
@@ -18,13 +18,17 @@
//
// command line
//
-if (process.argv.length != 5) {
- console.log("node screen.js server_port server_update_rate_ms client_update_rate_ms")
+if ((process.argv.length < 5) || (process.argv.length > 6)) {
+ console.log("node screen.js server_port server_update_rate_ms client_update_rate_ms [code]")
process.exit()
}
var port = parseInt(process.argv[2])
var server_delay = parseFloat(process.argv[3])
var client_delay = parseFloat(process.argv[4])
+if (process.argv.length == 6)
+ var code = process.argv[5]
+else
+ var code = "''"
//
// requires
//
@@ -56,7 +60,9 @@ http.createServer(function(request,response) {
if (url == '/') {
fs.readFile('viewer.html',function(err,data){
response.writeHead(200,{'Content-Type':'text/html'});
- response.end(data)
+ var str = data.toString()
+ str = str.replace('CODE',code)
+ response.end(str)
})
}
else if (url == '/img') {
diff --git a/viewer.html b/viewer.html
index f457f42..b8c8771 100644
--- a/viewer.html
+++ b/viewer.html
@@ -1,18 +1,37 @@
<html>
<body>
+<div id="page">
<img id="img" alt="waiting for screen transmission to start"><br>
<a href="screen.js">screen.js</a>
<a href="viewer.html">viewer.html</a>
+</div>
<script type="text/javascript">
//
// viewer.html
// screen.js content viewer
// Neil Gershenfeld
-// 2/9/17
+// 2/26/19
//
var client_delay
-initialize()
-update()
+var code = CODE
+insecure_auth()
+function insecure_auth() {
+ if (code == '') {
+ initialize()
+ update()
+ }
+ else {
+ var resp = prompt('screencast code?')
+ if (resp == code) {
+ initialize()
+ update()
+ }
+ else {
+ document.body.removeChild(document.getElementById('page'))
+ document.write('incorrect code')
+ }
+ }
+ }
function initialize() {
var req = new XMLHttpRequest()
req.open('GET','/initvars',true);
@@ -48,8 +67,8 @@ function update() {
req.addEventListener('loadend',function(evt) {
if (evt.loaded == 0) {
req.abort()
- document.getElementById("img").alt = 'screen transmission ended'
- document.getElementById("img").src = ''
+ document.body.removeChild(document.getElementById('page'))
+ document.write('screen transmission ended')
}
else {
var url = window.URL.createObjectURL(req.response)
--
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