A ruby gem that retrieves real-time stock quotes and historical pricing from google.
There are only two functions: quote and history.
Real-time stock quotes are retrieved through an undocumented Google API, as referenced here: http://www.jarloo.com/google-stock-api/
"It's not very well known and Google has no support or docs for it, but there is an elusive Google Stock API. Like most of Google's API's it's REST based. (I wish all API's were, as I hate SOAP) API Url Formatting. The API from what I can tell is very simple. It only has a single parameter that accepts a stock ticker."
You may retrieve up to 100 stock quotes per query, per stock, within google's daily API limits.
Historical pricing is retrieved through finance.google.com: http://www.google.com/finance/historical?q=SYMBOL&output=csv
Historical pricing only goes as far back as Google has recorded. You may only retrieve one stock per query, within google's daily API limits.
To install the 'stock_quote' ruby gem:
gem install stock_quote
To use the gem in your Rails Application, include it:
Include the gem in config/environments.rb:
config.gem "stock_quote"
Include the gem in your Gemfile:
gem "stock_quote"
You can get a current quote with the following syntax:
stock = StockQuote::Stock.quote("symbol")
Where symbol equals the company stock symbol you want a quote for. For example, "aapl" for Apple, Inc.
You may search for multiple stocks by separating symbols with a comma. For example:
stocks = StockQuote::Stock.quote("aapl, google")
These queries will return a Stock object or an array of Stock objects which you may iterate through. Each stock object has the following values:
- symbol
- pretty_symbol
- symbol_lookup_url
- company
- exchange
- exchange_timezone
- exchange_utc_offset
- exchange_closing
- divisor
- currency
- last
- high
- low
- volume
- avg_volume
- market_cap
- open
- y_close
- change
- perc_change
- delay
- trade_timestamp
- trade_date_utc
- trade_time_utc
- current_date_utc
- current_time_utc
- symbol_url
- chart_url
- disclaimer_url
- ecn_url
- isld_last
- isld_trade_date_utc
- isld_trade_time_utc
- brut_last
- brut_trade_date_utc
- brut_trade_time_utc
- daylight_savings
Historical queries provide an array of Price objects with the following values:
- date
- open
- high
- low
- close
- volume
Values may be accessed off the Stock or Price object like so:
StockQuote::Stock.quote("SYMBOL").last
Or:
stock = StockQuote::Stock.quote("SYMBOL")
stock.last
You can always convert the queries results to json with the following commands:
StockQuote::Stock.quote("SYMBOL").to_json
Or:
StockQuote::Stock.history("SYMBOL").to_json
...Google for making this api publicly available. I found the Google Finance API to be overly complex for simple stock quote queries.
Copyright (c) 2011 Ty Rauber
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.