汇率接口

1、获取全部iSO标准货币的 参照汇率（包含当前汇率情况）：
http://finance.yahoo.com/webservice/v1/symbols/allcurrencies/quote?format=json

2、获取单对货币 当前汇率信息
https://www.google.com/finance/converter?a=1&from=RUB&to=USD
http://download.finance.yahoo.com/d/quotes.csv?s=AUDUSD=X&f=nl1d1t1

3、一次获取单对 或 多对货币的汇率情况
http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20yahoo.finance.xchange%20where%20pair%20in%20(%22GBPCNY%22,%22JPYCNY%22)&format=json&env=store://datatables.org/alltableswithkeys

4、获取 单对货币 汇率的历史信息
https://query1.finance.yahoo.com/v7/finance/chart/EURCNY=X?range=1mo&interval=5m&indicators=close&includeTimestamps=true&includePrePost=false&corsDomain=finance.yahoo.com
https://query2.finance.yahoo.com/v7/finance/chart/EURCNY=X?period2=1487312468&period1=1455517268&indicators=quote