Author Archives: lantean

Twilio, the Cloud… and Me!

Today, we’ll briefly detail how to setup a Twilio VoIP number in a way that it’ll allow us to:

– Receive SMS’s via Email
– Send SMS’s via CLI
– Receive Voice Calls via Landline, and if nobody picks up, fallback to Softphone
– Make Voice Calls via Softphone

Before we begin, you’ll need to:

1. Signup!
2. Register a Number!
3. Create a SIP Domain
4. Add a User under the SIP Domains > Credential Lists
5. Setup this “SMS to Email” PHP script”, in your favorite EC2 box

Once ready, let’s open the Developer Center, and opening the TwiML bins. Once there, add the following TwiML’s:

Name: Incoming Voice to Softphone:

[cc lang=”xml”]



USER@SIP-DOMAIN.sip.us1.twilio.com


[/cc]

Name: Incoming Voice to Landline:

[cc lang=”xml”]


Please, hold on the line while i put you through.

YOUR-LANDLINE-NUMBER


[/cc]

Name: Incoming SIP to Destination:

[cc lang=”xml”]


{{#e164}}{{To}}{{/e164}}

[/cc]

Name: Incoming SMS to Email:

[cc lang=”xml]


URL-MAPPED-TO-YOUR-SEND-MAIL-SCRIPT

[/cc]

Once ready, open Phone Numbers > Manage Numbers > Active Numbers and map everything as follows:

– A call comes in: Incoming voice to Landline TwiML
– A message comes in: Incoming SMS to email Script’s URL

Finally, we need to map the “Incoming Voice to Softphone” TwiML, as follows:

– Open Programmable Voice
– Open SIP Domains and click over your domain
– Set the “Incoming Voice to Softphone” TwiML URL in the Voice Configuration > Request URL field

That should be it, pretty much. As per Soft Phones available for macOS, the most common one is X-Lite, which offers a free version (and it’s also available for iOS).

Hope that helps!

—

P.s.: With the following snippet, placed in you ~/.profile, you should be also able to send SMS’s via CLI:

[cc lang=”bash”]
function sms() {
curl -X POST ‘https://api.twilio.com/2010-04-01/Accounts/ACCOUNT-KEY/Messages.json’ \
–data-urlencode “To=${@:1:1}” \
–data-urlencode “From=YOUR-TWILIO-PHONE” \
–data-urlencode “Body=${@:2:1}” \
-u USER-KEY:USER-SECRET
}
[/cc]

Let’s Encrypt + Amazon AMI

Setup nginx:

  1. Download certbot:
    [cc lang=”bash”]
    $ wget https://dl.eff.org/certbot-auto
    $ chmod a+x certbot-auto[/cc]
  2. Generate Certificates:
    [cc lang=”bash”]sudo ./certbot-auto –debug -v –server https://acme-v01.api.letsencrypt.org/directory certonly -d YOUR_WEBSITE_HERE[/cc]
  3. Setup nginx and map to both, privkey + fullchain

Auto Renew:
[cc lang=”bash”]
sudo crontab -e
0 1,13 * * * /home/ec2-user/certbot-auto renew
[/cc]

Source Here

LLDB + Xcode 8 Kung Fu

Printing Arrays
parray number pointer
poarray number pointer

Reading Method Parameters
register read $arg1 $arg2
memory read $arg1

Printing Objects in Swift
expr -O --language objc -- 0x1003183e0

Disassembling the current frame
disassemble --frame

Module Image
image list ModuleName

UIStackView inside UISScrollView

1. Disable tAMIC

[cc lang=”objc”]
scrollView.translatesAutoresizingMaskIntoConstraints = false
stackView.translatesAutoresizingMaskIntoConstraints = false
[/cc]

2. Pin the ScrollView

[cc lang=”objc”]
NSLayoutConstraint.activate([
scrollView.leadingAnchor.constraint(equalTo: leadingAnchor),
scrollView.trailingAnchor.constraint(equalTo: trailingAnchor),
scrollView.topAnchor.constraint(equalTo: topAnchor),
scrollView.bottomAnchor.constraint(equalTo: bottomAnchor)
])
[/cc]

3. Pin the StackView to the ScrollView corners. Include minimum width + padding:

[cc lang=”objc”]
let padding = CGFloat(10)
NSLayoutConstraint.activate([
stackView.leadingAnchor.constraint(equalTo: scrollView.leadingAnchor, constant: padding),
stackView.trailingAnchor.constraint(equalTo: scrollView.trailingAnchor, constant: -padding),
stackView.topAnchor.constraint(equalTo: scrollView.topAnchor),
stackView.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor),
stackView.heightAnchor.constraint(equalTo: scrollView.heightAnchor),
stackView.widthAnchor.constraint(greaterThanOrEqualTo: scrollView.widthAnchor, constant: -2 * padding)
])
[/cc]