My presentation at the Open Source Event in the University of Economics and Technology in Ankara, Turkey

1. Yahoo’s open!
Offers for developers.
Chris Heilmann, Open Source Event , Ankara, Turkey, June 2008

2. Hi, I am Chris.

3. I’ll be here for a few more
hours, then I am back to
London, England.

4. I will *so* miss the weather
and the coffee.

5. You lucky, lucky people.

6. When I am gone, go and
speak to Volkan – out there.

7. 3x

8. Anyways...

9. Being a web developer is not
easy.

10. We spend most of our time
not developing but fixing
bugs.

11. If the bugs are straight
forward, then that is not an
issue.

12. Most of the time, we fix issues
though that are hard to track
down, impossible to
reproduce or just plain weird.

13. The problem is that the web
and browsers are not a
mature development
environment.

14. Bug fixing is not an effective
use of our time.

15. Which is why we do
something to make our
environment less random.

16. I will show you a lot of
resources now.

17. However, the good news is
that they all are available
from one starting point:

18. http://developer.yahoo.com

19. Let’s start with the APIs

21. The coolest thing about our
APIs?

22. Output formats that make
sense:
JSON, serialized PHP, XML

23. Everybody Duck!

24. There will be code

25. Retrieving and displaying
photos from Flickr.

27. Text
http://api.flickr.com/services/feeds/photos_public.gne?
id=11414938@N00&format= atom

28. Text
http://api.flickr.com/services/feeds/photos_public.gne?
id=11414938@N00&format= json

29. format=json
jsonFlickrFeed({
quot;titlequot;: quot;Uploads from codepo8quot;,
quot;linkquot;: quot;http://www.flickr.com/
photos/codepo8/quot;,
quot;descriptionquot;: quot;quot;,
quot;modifiedquot;:
quot;2008-06-17T09:14:05Zquot;,
quot;generatorquot;: quot;http://
www.flickr.com/quot;,
quot;itemsquot;: {[...]

30. format=json&jsoncallback=foo
foo({
quot;titlequot;: quot;Uploads from codepo8quot;,
quot;linkquot;: quot;http://www.flickr.com/
photos/codepo8/quot;,
quot;descriptionquot;: quot;quot;,
quot;modifiedquot;:
quot;2008-06-17T09:14:05Zquot;,
quot;generatorquot;: quot;http://
www.flickr.com/quot;,
quot;itemsquot;: {[...]

31. <div id=quot;flickrquot;></div>
<script type=quot;text/javascriptquot;>
function myflickr(data){
var f = document.getElementById('flickr');
out = '<ul>';
for(var i=0;data.items[i];i++){
var now = data.items[i];
var item = '<li><a href=quot;' + now.link + 'quot;>';
item += '<img src=quot;'+now.media.m+'quot; alt=quot;'+now.title+'quot;>';
item += '</a></li>';
out += item;
}
out += '</ul>';
f.innerHTML = out;
};
</script>
<script type=quot;text/javascriptquot; src=quot;http://api.flickr.com/
services/feeds/photos_public.gne?id=11414938@N00&lang=en-
us&format=json&jsoncallback=myflickrquot;>
</script>

33. What about server side?

34. <?php
$url = 'http://api.flickr.com/services/feeds/
photos_public.gne?tags='.$tag.'&format=php_serial';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$feed = curl_exec($ch);
curl_close($ch);
$data = unserialize($feed);
if(isset($data['items'])){
$items = $data['items'];
}
?>

35. <?php
$url = 'http://api.flickr.com/services/feeds/
photos_public.gne?tags='.$tag.'&format=php_serial';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$feed = curl_exec($ch);
curl_close($ch);
$data = unserialize($feed);
if(isset($data['items'])){
$items = $data['items'];
}
?>

36. http://icant.co.uk/easy-flickr/making-of/

37. These rules apply to almost
every API we offer.

38. You can cut down the
information to the bare
minimum you need.

39. But what if the APIs don’t
offer the right format or you
need to mix the data with
other services?

40. ★ Any input, any
processing, any
output
★ Infinite ways to
combine and
recombine data feeds
★ Output RSS, JSON,
Serialized PHP or
XML
★ Clone and edit
★ Visual Pipes Editor

41. So much for the data...

42. ... the display is the real
challenge though.

44. The Yahoo User Interface
library is what we use to
build.

45. It is there to fix issues we
know and encountered in a
central location.

46. Find issue
Fix issue
Tell YUI about it
Fix goes in YUI
No an issue any more.

47. We have a lot of users, a lot of
sites and an amazing amount
of issues come out of that.

48. We already fixed a lot.

49. YUI is...
A pattern library
(what solution is there to
solve a user need)

50. YUI is...
A JavaScript library
(Make all browsers work like
the good ones)

51. YUI is...
A CSS framework
(Create layouts that work
across browsers)

52. YUI is...
A development methodology.
(Unobtrusive Scripting,
Progressive Enhancement)

53. YUI is...
A development tools suite:
Logger, Profiler, Packer

54. YUI is...
Fully documented (JavaDoc)
and with lots and lots of
examples.

55. YUI is...
Free and open source
(forkable, no open repository
- yet)

56. YUI is...
Hosted by us and delivered as
close to your users as possible
(if you want to)

57. YUI is...
Making your life a *lot*
easier.

65. Tell us about your use of YUI!

69. So we offer our code and
content to you.

70. In English, for the moment.

71. we tried translating...

72. content = content.replace(/u/g,’ü’);

73. ...but then we realized it
makes more sense to get
folks like Volkan on the
ground.

74. ... so yeah, talk to him.

75. What about our systems?

76. Are they open?

78. SearchMonkey opens Yahoo
search result pages for
developers.

80. There are two types of
enhancements.

81. Enhanced results override the
original display.

82. Infobars add drop-down
menus:

83. You write your monkeys in
secure PHP
(no file or cookie nasties allowed)

84. And you can use any
information we know about
this URL.

85. And if there is not enough
information...

86. Use XML-Based Atom Feeds,
RDF markups, Microformats,
OpenSearch data or build a
Custom Data Service.

87. For example:

88. Using microformats in the
BBC site, we can display
showtimes of programs
already in the result page:
http://www.digital-web.com/articles/embedded_data_with_searchmonkey/

89. Questions?
Christian Heilmann | http://wait-till-i.com | twitter: codepo8
Thanks to:
Apelad (http://www.flickr.com/photos/apelad/2048858745/), Terence Yim and Digital Web