amazon, aws, database, heroku, ruby, simpledb at September 13th, 2009 by 小影
最近幾個 project 也使用 Heroku,對它的方便和效能也很滿意。只是它的免費帳戶只有 5M 的容量,它的收費帳戶分別為:$15 (美元,下同) 50M ,$50 500M,$200 500G (!),$1600 2T。對於那些沒賺錢又超過 5M 的計劃,這樣的費用也太高了。
看到 Amazon SimpleDB 推出了免費 Tier (每月首 1 G 的 data transfer 和 storage 也免費,之後的收費為 $0.1/G 傳送, $0.25/G 儲存),就想到將 Database 轉到 Amazon 上使用了。
在 Ruby 可以用 gem aws_sdb 去存取 SimpleDB ,也可以自行使用 RestClient 或 Typhoeus 存取 Restful API 。但對於現有使用 ...
Posted in Tech | 2 Comments »
pushr, ruby, sinatra, twitter at July 10th, 2009 by 小影
Today morning i discussed using Pushr to send notification in applications. While sending email or growl is cool, how about sending twitter notifications?
First add the twitter account @pushrhk.
Then create your node (replace "tweet-siuying" with any secret name you like):
The message received:
Of course if you can send POST to Pushr, ...
Posted in Tech | No Comments »
messaging, ruby at July 10th, 2009 by 小影
Quite often I found my self need to send notification in code ... maybe some program crashed, a new user joined, or I want to keep track of stock price.
Sometimes I want SMS, email, twitter, growl notifications... etc. If we are going to add these in every apps, they ...
Posted in Tech | No Comments »
json, jsonp, ruby, sinatra, web at June 21st, 2009 by 小影
Sinatra 是一個輕量級 Ruby Web Framework。
有了 Rails 為甚麼還要其他的 framework?因為這世上沒有 Golden Hammer ,使用適當的工具可以節省很多時間。
Posted in Tech | No Comments »
pdf, rss, ruby at June 14th, 2009 by 小影
因為電子書上沒有適合的 RSS Reader ,我寫了一個小程式把 RSS 轉為 PDF。
跟前幾篇一樣假設裝了 Ruby 和 Rubygems ,輸入以下指令:
gem sources -a http://gems.github.com
gem install siuying-rssbook
接著就可以把 RSS 檔案轉為 PDF:
rssbook engadgetchinese.rss engadget.pdf
也可以指定 URL:
rssbook "http://feeds2.feedburner.com/engadgetchinese?format=xml" engadget.pdf
也可使用自定的字型:
rssbook "http://feeds2.feedburner.com/engadgetchinese?format=xml" engadget.pdf "Arial Unicode.ttf"
Posted in Tech | No Comments »