post与get差异http://www.w3school.com.cn/tags/html_ref_httpmethods.asp
post Parameters: {"utf8"=>"?", "authenticity_token"=>"yGT+ikGn4u7FZGNKvklGC+pBPDYhoW5O6ri6rEsnvHam5Xuy++Tp2vzMMJhTOU7DnCTnE9NG/ppaPTmdu3Q2Fg==", "tags"=>"黄色", "commit"=>"查询"}
get Parameters: {"utf8"=>"?", "tags"=>"黄色", "commit"=>"查询"}
原文：http://www.cnblogs.com/znsongshu/p/7470213.html