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there once was a command line
nav filesystem, launch apps, write scripts
Input                                                    Output

                                            Program




lots of power in a bit of infrastructure involving input and output
STDIN                                                     STDOUT

                                          Program



                                                                   STDERR



stdin, stdout were available to reroute wherever the user wanted
most common use was chaining commands together: piping
Infrastructure

           STDIN                                                      STDOUT

                                         Program



                                                                 STDERR



this was an amazing amount of infrastructure based on a very simple idea
and we’ve had it since 1977
                              1977
1997
fast foward 20 years just after commercialization of internet to a perl conference
jon udell talks about websites as data sources that can be reused and remixed
today that idea isn’t very novel
a new programming paradigm
            that takes the whole Internet
                    as its platform



                         1997
he also talked about a new programming paradigm
i don’t think we’re there yet
but this inspired ...
“What is the equivalent of the pipe
          in the age of the web?”


tim oreilly to ask in 2000...
there seems to be resounding consensus the answer is feeds
they sound good in theory
it makes you think of feeds like in the telecom world
data coming directly to you
but we know that’s not how it works
?




instead we have to go request the data
then it gives it to us. and we do this over and over.
?




client side mashups might be able to get by with this
?




but when you start talking about persistent web applications, it becomes a bit more work
?


    • Crontab / Daemon
    • Parsing
    • Caching
?


                                       • Crontab / Daemon
                                       • Parsing
                                       • Caching
this is just too much work sometimes

the other problem i have is with the command line metaphor for web apps
Command-line
                                 Application
                             Start                              Stop




because a command line application is linear. it starts, runs, and stops
Web
                                   Application

                                                            Always
                                                            Running




web apps are always running.
a better metaphor for this is a running process or daemon
here we have some daemons.
this is ps doom
so using this metaphor, how do daemons communicate?
IPC?
       Inter process communication




ipc?
lol
                         h4x



                                                      stfu
                                                     n00b




...
yeah. my experience with ipc was pretty bad.
ipc usually involves some sort of shared memory mechanism, like a queue
it turns out amazon provides a queue web service
but with a third party queue you only defer the polling
it doesn’t solve the problem, its just fancier rss
so this is not the solution, and probably why not too many people use or know of it
Real-time
 Efficient
   Easy
Web Hooks




web hooks are user defined callback URLs that point to a web script to run on a certain event.
you can call them other things...
Web Hooks
                                  • User Callbacks
                                  • Triggers
                                  • Event Handlers
                                  • “Plugouts”

web hooks are user defined callback URLs that point to a web script to run on a certain event.
you can call them other things...
to implement web hooks, you generally provide a ui--
for the user to specify a url for events
http://example.com/post-commit.php
http://example.com/post-commit.php




                                                             Infrastructure
what this does is creates powerful infrastructure that might not be obvious at the surface
Easy for Vendors




the idea is that it’s easy for vendors to integrate
the main mechanism is a standard http post, which is trivial in most environments
Easy (enough) for Users




it’s also very open and easy for the users, which will generally be advanced users, but can easily be
taken advantage of by novice users
as a user, to take advantage of hooks, you’d write a script to handle an event, like the commit
this is a very simple script
“Internet”




so what the user would do
“Internet”




is put that script up on the internet
“Internet”




then they’d go to the hook settings page
and hook the commit event up to their script
then as the user interacts with devjavu
Commit!




and they make a commit, it fires a post to their script
Commit!




the script runs, and send an email to the mailing list
Commit!




this makes the user a happy cookie.
and this is a trivial example, using only on web service.
imagine using the api of another in the hook script and chaining these things together
Commit!




but even in this simple example, you see the power it gives to the user and to the data that we’re
trying to “open up” to our users
STDIN                                                      STDOUT

                                         Program




back to piping on the command line, remember that it was simple infrastructure that gave you
tremendous power, and one of the key components was making it easy to chain commands
STDIN

                                            Program




we wouldn’t be able to do it without the output part of it
API

                                           Web App




unfortunately that’s how the web is today.
the only output you can get is by using the input (api, feed)
API                                                            Hooks

                                           Web App




web hooks gives us this output, and when *combined* with the input of api’s
it will give us and our user tremendous power that i think will really push the web
into being a new programmable paradigm
Program the Web




the possibilities become very rich and i’ve thought about it a lot
there’s probably a lot more
imagine realtime data syncronization
or a chain of events that makes these apps work together in a way you’ve never imagined
Fin
Questions?




 blogrium.com
SuperHappyDevHouse
API                                                            Hooks

                                           Web App




web hooks gives us this output, and when *combined* with the input of api’s
it will give us and our user tremendous power that i think will really push the web
into being a new programmable paradigm

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Web Hooks

  • 1. there once was a command line nav filesystem, launch apps, write scripts
  • 2. Input Output Program lots of power in a bit of infrastructure involving input and output
  • 3. STDIN STDOUT Program STDERR stdin, stdout were available to reroute wherever the user wanted most common use was chaining commands together: piping
  • 4. Infrastructure STDIN STDOUT Program STDERR this was an amazing amount of infrastructure based on a very simple idea
  • 5. and we’ve had it since 1977 1977
  • 6. 1997 fast foward 20 years just after commercialization of internet to a perl conference jon udell talks about websites as data sources that can be reused and remixed today that idea isn’t very novel
  • 7. a new programming paradigm that takes the whole Internet as its platform 1997 he also talked about a new programming paradigm i don’t think we’re there yet but this inspired ...
  • 8. “What is the equivalent of the pipe in the age of the web?” tim oreilly to ask in 2000...
  • 9. there seems to be resounding consensus the answer is feeds they sound good in theory
  • 10. it makes you think of feeds like in the telecom world
  • 12. but we know that’s not how it works
  • 13. ? instead we have to go request the data
  • 14. then it gives it to us. and we do this over and over.
  • 15. ? client side mashups might be able to get by with this
  • 16. ? but when you start talking about persistent web applications, it becomes a bit more work
  • 17. ? • Crontab / Daemon • Parsing • Caching
  • 18. ? • Crontab / Daemon • Parsing • Caching this is just too much work sometimes the other problem i have is with the command line metaphor for web apps
  • 19. Command-line Application Start Stop because a command line application is linear. it starts, runs, and stops
  • 20. Web Application Always Running web apps are always running. a better metaphor for this is a running process or daemon
  • 21. here we have some daemons. this is ps doom so using this metaphor, how do daemons communicate?
  • 22. IPC? Inter process communication ipc?
  • 23. lol h4x stfu n00b ... yeah. my experience with ipc was pretty bad. ipc usually involves some sort of shared memory mechanism, like a queue
  • 24. it turns out amazon provides a queue web service but with a third party queue you only defer the polling it doesn’t solve the problem, its just fancier rss
  • 25. so this is not the solution, and probably why not too many people use or know of it
  • 27. Web Hooks web hooks are user defined callback URLs that point to a web script to run on a certain event. you can call them other things...
  • 28. Web Hooks • User Callbacks • Triggers • Event Handlers • “Plugouts” web hooks are user defined callback URLs that point to a web script to run on a certain event. you can call them other things...
  • 29. to implement web hooks, you generally provide a ui--
  • 30. for the user to specify a url for events
  • 32. http://example.com/post-commit.php Infrastructure what this does is creates powerful infrastructure that might not be obvious at the surface
  • 33. Easy for Vendors the idea is that it’s easy for vendors to integrate
  • 34. the main mechanism is a standard http post, which is trivial in most environments
  • 35. Easy (enough) for Users it’s also very open and easy for the users, which will generally be advanced users, but can easily be taken advantage of by novice users
  • 36. as a user, to take advantage of hooks, you’d write a script to handle an event, like the commit this is a very simple script
  • 38. “Internet” is put that script up on the internet
  • 39. “Internet” then they’d go to the hook settings page
  • 40. and hook the commit event up to their script
  • 41. then as the user interacts with devjavu
  • 42. Commit! and they make a commit, it fires a post to their script
  • 43. Commit! the script runs, and send an email to the mailing list
  • 44. Commit! this makes the user a happy cookie. and this is a trivial example, using only on web service. imagine using the api of another in the hook script and chaining these things together
  • 45. Commit! but even in this simple example, you see the power it gives to the user and to the data that we’re trying to “open up” to our users
  • 46. STDIN STDOUT Program back to piping on the command line, remember that it was simple infrastructure that gave you tremendous power, and one of the key components was making it easy to chain commands
  • 47. STDIN Program we wouldn’t be able to do it without the output part of it
  • 48. API Web App unfortunately that’s how the web is today. the only output you can get is by using the input (api, feed)
  • 49. API Hooks Web App web hooks gives us this output, and when *combined* with the input of api’s it will give us and our user tremendous power that i think will really push the web into being a new programmable paradigm
  • 50. Program the Web the possibilities become very rich and i’ve thought about it a lot there’s probably a lot more imagine realtime data syncronization or a chain of events that makes these apps work together in a way you’ve never imagined
  • 51. Fin
  • 54. API Hooks Web App web hooks gives us this output, and when *combined* with the input of api’s it will give us and our user tremendous power that i think will really push the web into being a new programmable paradigm