当当网获得商品详情 API 示例
API是应用程序的开发接口，在开发程序的时候，我们有些功能可能不需要从到到位去研发，我们可以拿现有的开发出来的功能模块来使用，而这个功能模块，就叫做库(libary)。比如说：要实现数据传输的安全，这就要使用加密技术，使用加密技术就要用到加密算法，而加密算法，已经有好心人，帮我们开发出来了加密算法库，你直接就可以调用，不需要再开发算法。
公共参数 企业级数据api
| 名称 | 类型 | 必须 | 描述 |
|---|---|---|---|
| key | String | 是 | 调用key（必须以GET方式拼接在URL中） |
| secret | String | 是 | 调用密钥 |
| api_name | String | 是 | API接口名称（包括在请求地址中）[item_search,item_get,item_search_shop等] |
| cache | String | 否 | [yes,no]默认yes，将调用缓存的数据，速度比较快 |
| result_type | String | 否 | [json,jsonu,xml,serialize,var_export]返回数据格式，默认为json，jsonu输出的内容中文可以直接阅读 |
| lang | String | 否 | [cn,en,ru]翻译语言，默认cn简体中文 |
| version | String | 否 | API版本 |
请求参数
请求参数：num_iid=25122027
参数说明：num_iid:EBAY商品ID
返回数据格式：
{"item": {"num_iid": "25122027","title": "朗读者（1-3辑）（荣获2017年度大众喜爱的50种图书）","desc_short": "","price": "156.00","total_price": 0,"suggestive_price": 0,"orginal_price": "156.00","nick": "","num": "","min_num": 0,"detail_url": "http://product.dangdang.com/25122027.html","pic_url": "//img3m7.ddimg.cn/84/26/25122027-1_u_10.jpg","brand": "","brandId": "","rootCatId": "","cid": "","crumbs": [],"created_time": "","modified_time": "","delist_time": "","desc": "","desc_img": [],"item_imgs": [{"url": "//img3m7.ddimg.cn/84/26/25122027-1_u_10.jpg"},{"url": "//img3m7.ddimg.cn/84/26/25122027-2_u_5.jpg"},{"url": "//img3m7.ddimg.cn/84/26/25122027-3_u_3.jpg"},{"url": "//img3m7.ddimg.cn/84/26/25122027-4_u_3.jpg"},{"url": "//img3m7.ddimg.cn/84/26/25122027-5_u_3.jpg"},{"url": "//img3m7.ddimg.cn/84/26/25122027-6_u_3.jpg"}],"item_weight": "","item_size": "","location": "","post_fee": "","express_fee": "","ems_fee": "","shipping_to": "","has_discount": "","video": [],"is_virtual": "","sample_id": "","is_promotion": "","props_name": "","prop_imgs": {"prop_img": []},"property_alias": "","props": [{"name": "开 本","value": "32开"},{"name": "纸 张","value": "胶版纸"},{"name": "包 装","value": "平装-胶订"},{"name": "是否套装","value": "是"},{"name": "国际标准书号ISBN","value": "25122027"}],"total_sold": "","skus": {"sku": []},"seller_id": "","sales": 0,"shop_id": "","props_list": [],"seller_info": {"nick": "","shop_name": "","city": "","level": "","rate": "","totle_pf": "","desc_pf": "","server_pf": "","send_pf": "","shop_type": "","user_num_id": "","shopid": "","shopname": "","zhuy": "http://shop.dangdang.com/","tel": "","menu": []},"tmall": "","error": "","warning": "","url_log": "","sold": "91598","stuff_status": "","props_img": [],"shopinfo": {"shop_name": ""},"promo_type": "","shop_item": [],"relate_items": [],"format_check": "ok"},
