At the moment, I am successfully sending a call to a SIP extension using Twilio. I know Twilio support passing extra custom SIP headers to the PBX, and I can do it by doing something like this:
sip:jack#example.com?myHeader=blah
and this works well.
But how can I pass a header which contains an equal sign (=) in its value? For example, let's say 'blah', was 'blah=foobar' instead.
I tried with:
sip:jack#example.com?myHeader=blah=foobar
and of course the call didn't reach my PBX.
Please could anyone help me with this?
Thanks a lot!
Fabrizio
You will need to URL encode your value (which you should probably be doing anyway).
An = sign once URL encoded becomes %3D.
So in your example you would need: sip:jack#example.com?myHeader=blah%3Dfoobar
There are various online encoders/decoders and most languages have build in utilities to do this also.
https://www.w3schools.com/tags/ref_urlencode.asp
For posterity, the official positon of Twilio is that they don't support passing a list of parameters as a value for a custom SIP header.
The support engineer who worked with me on this case made a feature request to the engineering team, so hopefully I will soon be able to solve my problem.
Related
I am using twilio to manage our IVR, to handle SMS, and for a few other things. After a user calls and goes through the IVR (for example they press 2 for sales or they say they want extension 205) I need it to hand off to Asterisk.
Setting up the trunk isn't my issue. I need to somehow tag it so asterisk knows how to handle the call. If they chose ext 205 on twilio, I need asterisk to automatically ring ext 205.
I am using a minimal version of asterisk basically for sip registration and voicemail and the rest is done by twilio.
Does anyone know if there is a way to do this in code? Or is my best bet to create a different trunk for each extension. That seems like it would get messy.
Correct solution is make IVR on asterisk. This solution also will be MUCH less costly.
But if you really want... On twilio setup via SIP tag
https://www.twilio.com/docs/voice/twiml/sip
set url to sip:0000+exten#your_asterisk_ip
On asterisk setup trunk to twilio server or allowguest=yes and default context to 'goext'
After that goext context something like this
[goext]
exten => _0000XXX,1,Set(ext=${EXTEN:4})
same => n,Dial(SIP/${ext},,o)
0000 replace with some random code, that required for prevent bots calls when allowguest=yes.
I am writting a custom slack command that implements a
task manager like interface (I know ... there are many out there :-), mine interfaces with odesk/upwork to outsource my micro-tasks :-) ) .
Anyway, I like a lot how the /remind command included Complete Delete etc links in its output to facilitate subsequent interactions with the user that entered the command and I am trying to figure out how to do the same trick.
What I have thought so far is to include links in my output that are ... GET /slack-link?method=POST&token=xxx&team_id=xx&command=.. ie carry in their query string the complete json payload that slack would have produced from a normal custom command. slack-link acts as a "proxy" whose sole role is to submit a POST back to my normal slack endpoint. I can even reuse the same response_url for these command-links.
I have not tried it but I think these URLs will just open another window so that path wont exactly work...
Has anybody tried something like that before?
As you've learned, those are currently only available to built-in commands. However, as I was curious and wanted to know how those are done, I looked in the API and found out that the URLs are just formatted normally but have a special "protocol":
You asked me to remind you to “test”.
_<slack-action://BSLACKBOT/reminders/complete/D01234567/1234//0/0/5678|Mark as complete>
or remind me later: <slack-action://BSLACKBOT/reminders/snooze/D01234567/1234//0/0/5678/15|15 mins> [...]
Clicking on such a link results in an API request to method chat.action, with the following parameters:
bot: BSLACKBOT
payload: reminders/complete/D01234567/1234//0/0/5678
token: xoxs-tokenhere-nowayiampostingithere
So it looks like those URLs have three parts:
<slack-action://BSLACKBOT/reminders/complete/[...]|Mark as complete>
slack-action://: the "protocol" like prefix to let Slack know this is a chat action URL.
BSLACKBOT: the bot which (who?) will receive the payload. Can only be a bot user and the ID must start with B, or the API request will fail with invalid_bot.
the rest of the URL: the payload that gets passed to the bot. It doesn't look like this is parsed nor handled specially by Slack.
This is actually not a new feature, since they used to have API URLs back in late 2013 or early 2014 (I don't remember precisely) which they removed for "security reasons".
It could be interesting to see if we can use chat actions with custom bots, and if so, what we could do with it.
I got the answer from Slack support:
In regard to your original question: currently Slack doesn't provide
the ability to embed 'action' links in our custom integrations. Only
built-in features like /remind can utilize these at the moment. For
external services, you'll need to link to a URL that opens in an
external web browser.
We do hope to provide a similar function for custom integrations in
the future, allowing for interactive messages.
Thanks,
Ben
I have this site:
https://acad.unoesc.edu.br/academico/login.jsp
And I want to put info in the fields values and submit then, to get the next page and navigate in that site. Thats because I want to create an android app or something like that. Im using lua in first case, with luasocket(http).
I know that the input has its names, but I dont know how to set then and send then to the server. If someone can help me with this.
Thank you.
You can use POST method with luasocket. See the official documentation and a detailed example in this SO answer.
Since you seem to be doing authentication, you'll probably need to save the cookie value returned to you as part of the login response and then pass that cookie back to the server (otherwise your subsequent requests will fail as the server will reject those requests as non-authenticated).
Since you are sending this over https, you'll need to use LuaSec, which provides ssl.https module as replacement for the http module that luasocket provides. You may check my blog post for some example of how this can be done.
Hi i have googled all day long but i can't find an answer.
I have to write a web app which talks to asterisk.
It should be able to do ClicktoCall operations.
Can you guys recommend something ?
I came across a few projects but I'm still not sure.
I just want to connect to Asterisk and do calls from the web app.
thanks
If you're a Ruby programmer the best way for you to hook into Asterisk is adhearsion. It wraps up Asterisk's AGI and Manager (MAPI) APIs for you.
Also hAve a look at SIP, asterisk, adhearson and VoIP and in particular Adam Kalsey's answer. He works for Tropo which sponsor the adhearsion project.
First you need to know, that the protocol Asterisk uses is SIP, you can learn more at the Wikipedia.
Since you want to use an rails application, you may want to use ruby as well, so there's a ruby implementation named OverSip, you can check their API and see if it fits your requirements.
If you are aiming at web calls, you'll need an WebRTC, Flash or Java applet. For WebRTC you can check sipML5 for an opensource solution.
You can also opt for an interface, that will start a call from one number to another, using your phone. When the first call is picked up the server starts ringing in the destination.
Also you could make use of cloud communications providers like twilio, tropo, etc.
Try this Google search:
rails asterisk manager interface
I saw some interesting things right off. I am not trying to be one if those Use Google type people, just didn't want to paste all the links in that I found from this Google search.
Check it out, hope it helps.
There are several ways to do this but the three easiest ones are
1. Generate a call file on the Asterisk server
These files should be written to the dir
/var/spool/asterisk/outgoing
Asterisk will then pickup the file, process and delete it.
It's pretty aggressive when doing this so it's recommended to write the file into a temporary directory and then move it to the spool dir for processing.
An tutorial of the file format is here:
https://www.voip-info.org/asterisk-auto-dial-out/
(I personally feel this is a bit "hacky", and prefer doing it with an API call)
2. Generate the call by the AMI API interface.
Use the Originate function of the AMI API to generate the call. It's pretty easy to set this up just configure the manager.conf file whitch sets up a HTTP server on port 5038 from witch you can call the API.
https://www.voip-info.org/asterisk-config-managerconf/
3. Set up the call using the ARI API
First you need to setup ari.conf, this is enough for now:
[general]
enabled = yes
pretty=yes
allowed_origins=http://ari.asterisk.org
[my_username]
type = user
read_only = no
password = my_password
password_format = plain
This is a little bit more complicated to set up, but it really isn't that hard if you just get past the technical geek-speak. Just set up two channels, setup a mixing bridge and add both channels to the bridge.
To set up a click2call you dont even need to do that...
This is the call we use (ruby):
where
#{sip_id} is your registered SIP username
#{number} is the extension that is sent to the dialplan
#{USERNAME}
#{PASSWORD} is from ari.conf
HTTParty.post("http://sipserver.com/ari/channels?endpoint=SIP/#{sip_id}&extension=#{number}&context=outgoing&priority=1&timeout=30&api_key=#{USERNAME}:#{PASSWORD}")
(Note that you need to send the variabels for the variable parameter as a separate JSON for the originate command if you need to send them)
A really useful tool to understand how this works is the swagger at
http://ari.asterisk.org. We already allowed this origin in ari.conf so it should be ready to go. Remember to open your ports in firewalls etc.
Setup your Server IP and port and the API_KEY is in this format: my_username:my_password
Much like the "mailto" URL prefix launches the user's default mail program and starts a new email with specified address, is there a similar URL scheme that would initiate a phone call? Perhaps "phone," "call," or "sip"?
Incidentally, I'm targeting a platform that is using Cisco CUPS, so there may be a platform-specific way for me to initiate a call that is particular to Cisco, but I thought I'd ask the more general question first. However if anyone knows specifically how to programmatically initiate a call via CUPS, that would be great too.
The official standard for providing a telephone number as a URI is here: http://www.ietf.org/rfc/rfc3966.txt
It basically says use tel: as the prefix, and start the number with +[international dialling code] before the number itself. You can put non-numeric characters as separators (e.g. -) but they must be ignored. So a London (UK) number might be:
tel:+44-20-8123-4567
A New York (US) number:
tel:+1-212-555-1234
There is such a URI scheme: tel. It has an elaborate syntax, but here is a simple example of its usage:
tel:123-4567
For the full specification, refer to http://www.ietf.org/rfc/rfc3966.txt .
I'm after the same sort of functionality for Microsoft Office Communicator. After a bit of investigation I found that the following URI syntax will initiate a (VoIP) phone call via communicator:
tel:+number
eg: to get communicator to call my extension:
tel:+7780
sip: (or sips:) is the official URI scheme for SIP, and I think callto: was used by Skype, but is deprecated.