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Right-To-Left Override Twitter Name

2020 Oct 21, 3:50

Its rare to find devs anticipating Unicode control characters showing up in user input. And the most fun when unanticipated is the Right-To-Left Override character U+202E. Unicode characters have an implicit direction so that for example by default Hebrew characters are rendered from right to left, and English characters are rendered left to right. The override characters force an explicit direction for all the text that follows.

I chose my Twitter display name to include the HTML encoding of the Right-To-Left Override character #x202E; as a sort of joke or shout out to my favorite Unicode control character. I did not anticipate that some Twitter clients in some of their UI would fail to encode it correctly. There's no way I can remove that from my display name now.


Try it on Amazon.


How about pages that want to tell you about the U+202E. 


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Tweet from NASA Planetquest

2017 Jan 26, 10:25
See another solar system! These are real images of a 4-planet system ~130 light-years from . Read about it: http://go.nasa.gov/2kySSt1 
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Tweet from David Risney

2016 Dec 10, 10:07
Seems like @pushalotapp isn't on the Microsoft Store anymore? Will it come back?
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Tweet from David Risney

2016 Dec 7, 10:04
@ericlaw that is a solid lock. Not getting through that lock!
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Tweet from David Risney

2016 Dec 7, 5:30
@ericlaw @RReverser broke my screenshot muscle memory. Switched to snipping tool.
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Tweet from David Rousset

2016 Dec 6, 8:45
Creating an extension for all browsers: , , , & : https://www.davrous.com/2016/12/07/creating-an-extension-for-all-browsers-edge-chrome-firefox-opera-brave/ 
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Tweet from Andy Baio

2016 Dec 6, 2:30
OH. MY. GOD. @SethBling MADE AN ATARI 2600 EMULATOR IN MINECRAFT. https://youtu.be/5nViIUfDMJg 
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Tweet from David Risney

2016 Dec 5, 5:52
@davatron5000 I have a C:\users\dave\bin path I've added to my PATHS
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Tweet from David Risney

2016 Dec 4, 2:26
Oh just realized Trevor, Simon, and Rebus are all the same person. Awesome. Assuming @StevenOgg isn't a robot
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Tweet from David Risney

2016 Dec 4, 9:30
@AGoldmund Its my morning two minute hate. And then again around lunch time. And also just whenever.
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Tweet from David Risney

2016 Nov 30, 1:16
Twitter is 1984 two minutes hate
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Tweet from David Risney

2016 Nov 18, 4:11
@PA_Megacorp I read the title as Couchomancy and imagined a necromancer that summons couches. No one steal my new YA fantasy novel idea pls
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Tweet from David Risney

2016 Nov 6, 1:17
@ericlaw Very fitting for the show but... those serifs. Aspects of 80s aesthetic I can do without include: wood paneling on cars, that font.
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Let's Encrypt NearlyFreeSpeech.net Update

2016 Nov 5, 8:59

Since I had last posted about using Let's Encrypt with NearlyFreeSpeech, NFS has changed their process for setting TLS info. Instead of putting the various files in /home/protected/ssl and submitting an assistance request, now there is a command to submit the certificate info and a webpage for submitting the certificate info.

The webpage is https://members.nearlyfreespeech.net/{username}/sites/{sitename}/add_tls and has a textbox for you to paste in all the cert info in PEM form into the textbox. The domain key, the domain certificate, and the Let's Encrypt intermediate cert must be pasted into the textbox and submitted.

Alternatively, that same info may be provided as standard input to nfsn -i set-tls

To renew my certificate with the updated NFS process I followed the commands from Andrei Damian-Fekete's script which depends on acme_tiny.py:

python acme_tiny.py --account-key account.key --csr domain.csr --acme-dir /home/public/.well-known/acme-challenge/ > signed.crt
wget -O - https://letsencrypt.org/certs/lets-encrypt-x3-cross-signed.pem > intermediate.pem
cat domain.key signed.crt intermediate.pem > chained.pem
nfsn -i set-tls < chained.pem
Because my certificate had already expired I needed to comment out the section in acme_tiny.py that validates the challenge file. The filenames in the above map to the following:
  • signed.crt is the Let's Encrypt provided certificate
  • account.key is the user private key registered with LE
  • domain.csr is the cert request
  • domain.key is the key for the domain cert
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Tweet from David Risney

2016 Nov 4, 4:08
@David_Risney Example graph https://raw.githubusercontent.com/david-risney/WinMDGraph/master/examples/3/3.dot.png  of the Windows .Services.Maps namespace
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Tweet from David Risney

2016 Nov 4, 1:48
@JenMsft Your tip weets should show as toasts for all win10 users
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Tweet from Jen Gentleman 🌺

2016 Nov 4, 8:39
If you ever see a dialog box in this style & need to record what it said, instead of typing it out, just CTRL+C ➡📋
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Tweet from David Risney

2016 Nov 3, 3:59
@FakeUnicode Spaces are technically not allowed in a URI so the only reasonable representation is percent encoded.
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Tweet from David Risney

2016 Nov 3, 3:58
@FakeUnicode Reserved characters including brackets change meaning when decoded or encoded and so UA must not change those
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Tweet from David Risney

2016 Nov 3, 3:57
@FakeUnicode At least some of that is from https://tools.ietf.org/html/rfc3986 . For unreserved characters (a-z0-9._-~) normal form is decoded.
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