Erwan Robin viendra nous expliquer comment l’entreprise arrive à pousser et mettre à jour à distance une configuration permettant de modifier le comportement d’une application publiée sur l’App Store. Le système était précédemment utilisé pour mettre à jour les localisations, il est désormais également exploité pour modifier les paramètres de l’app pour activer ou désactiver des fonctionnalité, à distance, en fonction des pays.

1. @BlaBlaCarTech
👐CocoaHeads
https://github.com/blablacar
http://blablatech.com

3. Erwann Robin
iOS Developer
@Diwann
iOS Developer

4. 30€ 30€30€ 30€
120 €

5. 30€ 30€30€ 30€
120 €

8. 15M
10M
5M
2009 2010 2011 2012 2013 2014 2015

9. 20M
15M
10M
5M
2009 2010 2011 2012 2013 2014 2015
20 million
members in 2015

10. ...in 19 countries

11. ...with 14 offices

12. @BlaBlaCarTech
Manage Apps at Home

13. 2009

14. NOW

15. From webview to native
! Keep the webview flexibility:
○ update strings without
submission
○ easily deploy features at a
specific time

19. CloudFront
CloudFront

20. CloudFront
CloudFront
10-17M requests / day
99.9%
0.1%

21. Why this solution?
API
○ server traffic
○ distribution impact
! S3/Cloudfront
○ nothing to do
○ distribution

22. User side
EN
FR
ES
...

23. User side
EN
FR
ES
...

24. User side
EN
FR
ES
...
CloudFront

25. Tech side
EN
FR
ES
...
CloudFront
1
2015-11-13 14:03:05

26. Tech side
EN
FR
ES
...
CloudFront
CloudFront
304
Not modified
1
2
2015-11-13 14:03:05

27. User side
EN
FR
ES
...
CloudFront
CloudFront
304
Not modified
1
2
2015-11-13 14:03:05
10-17M requests / day
File Transfer : 16%
= 1.5-2.6 To saved

28. Dev side
BBS3DownloaderManager : downloadFileIfModifiedSince
NSDictionary *fileAttributes = [[NSFileManager defaultManager] attributesOfItemAtPath:filePath
error:nil];
NSDate *lastModifiedDate = [fileAttributes fileModificationDate];
NSString *lastModifiedString = [[BBS3DownloaderManager aws3DateFormatter]
stringFromDate:lastModifiedDate];
if (lastModifiedString) {
[(NSMutableURLRequest*)req setAllHTTPHeaderFields:@{@"If-Modified-Since" :
lastModifiedString}];
}

29. Dev side
BBS3DownloaderManager : downloadFileSucceed
NSString *lastModifiedString = operation.response.allHeaderFields[@"Last-Modified"];
NSDate *lastModifiedDate = [[BBS3DownloaderManager aws3DateFormatter]
dateFromString:lastModifiedString];
NSDictionary *modificationDateAttr = [NSDictionary dictionaryWithObjectsAndKeys:
lastModifiedDate, NSFileModificationDate, nil];
[[NSFileManager defaultManager] setAttributes:modificationDateAttr ofItemAtPath:filePath
error:nil];

30. Dev side
BBLocalization :
- Find the right locale
- Check if there is already a downloaded file
- Load local locale file ;-)
- Try to refresh this file from the network and reload it

31. OpenLocalization

32. openL10n.io

33. Create and push new trads
Translate and distribute

34. What
About
Features?

37. BBS3DownloaderManager
BBLocalization
BBConfiguration / BBConfigurationManager

38. BBConfigurationManager
- Find the right country
- Check if there is already a downloaded config file
- Load local config file
- Try to refresh this file from the network and reload it

40. Exemple
{
“use_regular_trip” : false,
...
}

41. Activate a feature
{
“use_regular_trip” : false,
...
}
true

42. Dev side
if ([BBConfigurationManager sharedManager].configuration.isRegular) {
// ...
}

44. Exemple - Activate a country
language: pt
regional format: pt_BR
02/11/15

45. Activate a country
language: pt
regional format: pt_BR
{
“fr” : {...},
“pt” : {
“default”:”
portugal”
},
...
}
02/11/15

46. Illustration - Add new country
language: pt
regional format: pt_BR
{
“fr” : {...},
“pt” : {
“default”:”
portugal”
},
...
}
{
“france”: {...},
“portugal” :
{...},
...
}
02/11/15

47. Illustration - Add new country
language: pt
regional format: pt_BR
{
“fr” : {...},
“pt” : {
“default”:”
portugal”
},
...
}
{
“fr” : {...},
“pt” : {
“default”:”
portugal”,
“pt_BR”:”
brazil”
},
...
}
02/11/15
{
“france”: {...},
“portugal” :
{...},
...
}

48. Illustration - Add new country
language: pt
regional format: pt_BR
{
“fr” : {...},
“pt” : {
“default”:”
portugal”
},
...
}
{
“fr” : {...},
“pt” : {
“default”:”
portugal”,
“pt_BR”:”
brazil”
},
...
}
{
“france”: {...},
“portugal” :
{...},
“brazil”: {...}
...
}
02/11/15
{
“france”: {...},
“portugal” :
{...},
...
}

49. Rollout
OctoberSeptemberAugustJulyJune

50. Unexpected benefit …

51. ! Cache application
! Request handler
! iOS version killer

52. ➔Web based configuration tool
➔App version killer
➔Feature Release Date
➔bare NSURLSession
➔OpenSource ?

53. What’s next?Thanks!