JavaScript获取本地城市和天气预报实现
1、获取城市接口，新浪的接口相对简单。
URL：http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=js
结果：
var remote_ip_info = {"ret":1,"start":-1,"end":-1,"country":"\u4e2d\u56fd","province":"\u5317\u4eac","city":"\u5317\u4eac","district":"","isp":"","type":"","desc":""};2、获取天气预报接口，因为baidu的接口有雾霾指数，所以选择了它。
URL：http://api.map.baidu.com/telematics/v3/weather?location=北京&output=json&ak=EGgzZ22dsboWQEcPQ6KDQLknQd3YkkkP
响应结果：
{"error":0,"status":"success","date":"2017-03-13","results":[{"currentCity":"北京","pm25":"28","index":[{"title":"穿衣","zs":"较冷","tipt":"穿衣指数","des":"建议着厚外套加毛衣等服装。年老体弱者宜着大衣、呢外套加羊毛衫。"},{"title":"洗车","zs":"较适宜","tipt":"洗车指数","des":"较适宜洗车，未来一天无雨，风力较小，擦洗一新的汽车至少能保持一天。"},{"title":"旅游","zs":"适宜","tipt":"旅游指数","des":"天气较好，温度适宜，是个好天气哦。这样的天气适宜旅游，您可以尽情地享受大自然的风光。"},{"title":"感冒","zs":"较易发","tipt":"感冒指数","des":"昼夜温差较大，较易发生感冒，请适当增减衣服。体质较弱的朋友请注意防护。"},{"title":"运动","zs":"较不宜","tipt":"运动指数","des":"天气较好，但考虑天气寒冷，推荐您进行各种室内运动，若在户外运动请注意保暖并做好准备活动。"},{"title":"紫外线强度","zs":"中等","tipt":"紫外线强度指数","des":"属中等强度紫外线辐射天气，外出时建议涂擦SPF高于15、PA+的防晒护肤品，戴帽子、太阳镜。"}],"weather_data":[{"date":"周一 03月13日 (实时：14℃)","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/qing.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/qing.png","weather":"晴","wind":"南风微风","temperature":"14 ~ 2℃"},{"date":"周二","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/qing.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/duoyun.png","weather":"晴转多云","wind":"南风微风","temperature":"15 ~ 2℃"},{"date":"周三","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/duoyun.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/duoyun.png","weather":"多云","wind":"南风微风","temperature":"16 ~ 4℃"},{"date":"周四","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/duoyun.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/yin.png","weather":"多云转阴","wind":"南风微风","temperature":"17 ~ 5℃"}]}]}
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