Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
iframe: a less than useful look at the abuse th...
Search
Remy Sharp
December 02, 2013
Technology
8
1.1k
iframe: a less than useful look at the abuse the iframe takes
A 20 minute version for dotjs of my iframe abuse talk
Remy Sharp
December 02, 2013
Tweet
Share
More Decks by Remy Sharp
See All by Remy Sharp
Using a Modern Web to Recreate 1980s Horribly Slow & Loud Loading Screens
rem
0
140
Recreating the ZX Spectrum loader with Web APIs
rem
0
240
Living Standard
rem
1
300
State of the Gap
rem
1
890
The Art of Debugging
rem
2
2.2k
EdgeConf - Progressive Enhancement
rem
0
300
Toxic Side of Free. Or: how I lost the love for my side project.
rem
0
770
Muddling my way through real time
rem
0
760
The Bits Behind JS Bin
rem
4
920
Other Decks in Technology
See All in Technology
PHPでWebブラウザのレンダリングエンジンを実装する
dip_tech
PRO
0
210
怖くない!はじめてのClaude Code
shinya337
0
250
Tech-Verse 2025 Global CTO Session
lycorptech_jp
PRO
0
960
AWS テクニカルサポートとエンドカスタマーの中間地点から見えるより良いサポートの活用方法
kazzpapa3
2
570
AIとともに進化するエンジニアリング / Engineering-Evolving-with-AI_final.pdf
lycorptech_jp
PRO
0
120
急成長を支える基盤作り〜地道な改善からコツコツと〜 #cre_meetup
stefafafan
0
150
生成AIで小説を書くためにプロンプトの制約や原則について学ぶ / prompt-engineering-for-ai-fiction
nwiizo
4
3k
BrainPadプログラミングコンテスト記念LT会2025_社内イベント&問題解説
brainpadpr
1
170
使いたいMCPサーバーはWeb APIをラップして自分で作る #QiitaBash
bengo4com
0
1k
Snowflake Summit 2025全体振り返り / Snowflake Summit 2025 Overall Review
mtpooh
2
420
GitHub Copilot の概要
tomokusaba
1
140
登壇ネタの見つけ方 / How to find talk topics
pinkumohikan
5
550
Featured
See All Featured
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
8
800
No one is an island. Learnings from fostering a developers community.
thoeni
21
3.3k
Fireside Chat
paigeccino
37
3.5k
The Success of Rails: Ensuring Growth for the Next 100 Years
eileencodes
45
7.5k
Writing Fast Ruby
sferik
628
62k
What's in a price? How to price your products and services
michaelherold
246
12k
Side Projects
sachag
455
42k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
PRO
181
53k
"I'm Feeling Lucky" - Building Great Search Experiences for Today's Users (#IAC19)
danielanewman
229
22k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
15
1.5k
Thoughts on Productivity
jonyablonski
69
4.7k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
20
1.3k
Transcript
<iframe> A less than useful look at the abuse the
iframe takes. Remy Sharp • @rem • Left Logic
2007: detect globals 2008: jsbin 2010: jsconsole 2011: responsivepx
2008: 1.jsbin.com
2010: 2.jsbin.com
2012: 3.jsbin.com
framesets
Amazingly still work! two frames side by side
document.body = frameset
Scott Isaacs @ Microsoft 1997
iframe support dropped in XHTML 1.1 Lack of <object> support
in IE7 meant iframes stuck around.
Foundation of early comet techniques 2000/2006 var iframe = document.createElement('iframe');
iframe.style.display = 'none'; document.head.appendChild(iframe); iframe.src = '/live-stream'; require('http').createServer(function (req, res) { res.writeHead(200, { 'content-type': 'text/html' }); res.write(sendPadding()); setInterval(function () { res.write(getLiveData()); }, 1000); });
iframe must be in DOM to start writing to it
var window = iframe.contentWindow || iframe.contentDocument.parentWindow;
function iframe() { var iframe = document.createElement('iframe'); document.body.appendChild(iframe); return iframe.contentWindow
|| iframe.contentDocument.parentWindow; } var window = iframe(), document = window.document; document.open(); document.write(myAwesomeHTML); document.close();
Load won't fire until .close is called - though content
loads
Take a generated iframe out of the DOM, it'll reset
Dynamic iframes don't behave like regular windows !
The "stick it in an iframe" bit
Auto-play! Missing <bgsound> on mobile? <iframe src="muzak.mp3"></iframe> iOS 4 only
:(
Site doesn't have JSON API? Put their HTML embed in
an iframe and scrape away!
Detecting globals
Mobile WebView (PhoneGap, Chrome for iOS, etc)
Click-jacking Watch out!
Preventable in IE9+ via X-Frame-Options: SAMEORIGIN
Damn you mobile version <meta name="viewport" ...>
"Damn flash-ad is showing through the dropdown!"
Sync loading can be offloaded to iframes, as it won't
block the parent frame.
Factory reset a Samsung S3? <iframe src="tel:*2767*3855%23"></iframe>
x-frame comms
For bi-directional non- sockets comms
Used in jsconsole's remote
your mobile site add <script> iframe origin: jsconsole.com jsconsole.com postMessage
& onmessage EventSource Ajax post
Set "base" origin via document.domain
iframe a.com – iframe b.com — iframe a.com Deep communication
http://bit.ly/cross-domain-barrier
Passing data before load event via: window.name
Sandboxing iframe return "clean" object
Enable appcache on unknown urls
•Request / == "app chrome" •All other urls include iframe
to light manifest page •Manifest says: FALLBACK: /* / •Therefore: any request to an unknown url, the "app chrome" will load via the fallback
Future / Now / Good Parts • postMessage/onMessage • seamless
• srcdoc • sandbox="allow-same-origin allow-forms allow-scripts" http://benvinegar.github.com/seamless-talk/
In the next episode: setTimeout! Remy Sharp • @rem •
Left Logic leftlogic.com/hiring