REST API设计规范

http://example.com/libraries              //列出所有图书馆

http://example.com/books                  //列出所有图书

http://example.com/libraries/ID/books     //列出某个图书馆的全部图书

http://example.com/libraries/ID/books/ID  //列出某个图书馆的某本图书

http://example.com/books?library_id=ID    //参数的存在允许API路径与URL参数有相同的含义

http://example.com/libraries/ID/books?book_type=biography&year=2010  //筛选出2010年出版的传记类图书 

{ error: "Invalid API key" }