This document summarizes a developer's notes from a 24-hour coding contest on building a Twitter application using Ruby on Rails. It describes setting up OAuth authentication with Twitter at various times between 8:50 and 15:17. It also mentions using Sinatra and Haml and troubleshooting OAuth signature and token validation errors.

1. 24
2010/05/22 24 LT
※

3. / @hmsk

4. 2010/4

5. #24contest

6. Ustream from

7. 24

11. “
”

13. …

15. 9:30
40min

16. = 09:30 - 40min - ε

17. = 8:50 - ε

18. 1 1

20. 1 …

21. 1 …

22. 1 …

24. Twitter

26. 1
Twitter

28. Sinatra
Haml
Twitter OAuth

30. 21:00 …

31. 22:00

34. / /

36. 23:00

37. 24:00

39. 26:00

40. Sinatra
http://www.sinatrarb.com/

41. Haml
http://haml-lang.com/

43. :

44. 27:27 CRUD
http://twitter.com/hmsk/status/12717495867

45. OAuth

47. http://twitter.com/hmsk/status/12718843109

49. Twitter OAuth

50. 401 Unauthorized

52. Ruby

53. oauth

55. 8:XX

56. 9:12
http://twitter.com/hmsk/status/12732801009

57. 10:30
LT

58. 11:09
http://twitter.com/hmsk/status/12738426406

60. /

61. 11:24
http://twitter.com/hmsk/status/12739157563

62. 13:30 LT
http://www.flickr.com/photos/earth2001y/4552834786/

63. OAuth HTTP

64. http://www.flickr.com/photos/june29/4551059775/

67. 15:17
http://twitter.com/hmsk/status/12749060479

68. http://blainegarrett.com/2009/07/14/failed-to-validate-oauth-signature-
and-token-on-twitter-oauth-check-your-cloc/

69. ntpdate
[hmsk@] # sudo /usr/sbin/ntpdate 192.168.11.2
20 Apr 21:17:33 ntpdate[21514]: step time server 192.168.11.2
offset -1944306.857336 sec

70. oauth xml
…
<oauth_signature>#{request.oauth_signature}</oauth_signature>-
<oauth_timestamp>#{request.oauth_timestamp}</oauth_timestamp>
<oauth_nonce>#{request.oauth_nonce}</oauth_nonce>
<oauth_version>#{request.oauth_version}</oauth_version>

71. …

73. 21:00
http://www.flickr.com/photos/zoamichi/4551068892/

75. 1 CRUD

76. 1 reply bot

79. CSS

88. http://hmsk.kawataso.net/