必應每日一圖直接獲取及接口

必應官網：https://cn.bing.com/

返回Json數據的接口
https://cn.bing.com/HPImageArchive.aspx?format=js&idx=0&n=1

返回結果:

{
    "images": [
        {
            "startdate": "20190604",
            "fullstartdate": "201906041600",
            "enddate": "20190605",
            "url": "/th?id=OHR.PeruvianRainforest_ZH-CN4066508593_1920x1080.jpg&rf=LaDigue_1920x1080.jpg&pid=hp",
            "urlbase": "/th?id=OHR.PeruvianRainforest_ZH-CN4066508593",
            "copyright": "祕魯亞馬遜坦博帕塔國家保護區中的樹冠 (© Patrick Brandenburg/Tandem Stills + Motion)",
            "copyrightlink": "http://www.bing.com/search?q=%E6%A0%91%E5%86%A0&form=hpcapt&mkt=zh-cn",
            "title": "",
            "quiz": "/search?q=Bing+homepage+quiz&filters=WQOskey:%22HPQuiz_20190604_PeruvianRainforest%22&FORM=HPQUIZ",
            "wp": true,
            "hsh": "73a0f621c340498bb1abbfb4abf79258",
            "drk": 1,
            "top": 1,
            "bot": 1,
            "hs": []
        }
    ],
    "tooltips": {
        "loading": "正在加載...",
        "previous": "上一個圖像",
        "next": "下一個圖像",
        "walle": "此圖片不能下載用作壁紙。",
        "walls": "下載今日美圖。僅限用作桌面壁紙。"
    }
}

其中字段url就是圖片地址，但是隻有一半，需要加一個前綴。
地址前綴https://www.bing.com/ 和http://s.cn.bing.net都可以。
即完整的圖片地址爲
http://s.cn.bing.net/th?id=OHR.PeruvianRainforest_ZH-CN4066508593_1920x1080.jpg&rf=LaDigue_1920x1080.jpg&pid=hp
或者
https://www.bing.com/th?id=OHR.PeruvianRainforest_ZH-CN4066508593_1920x1080.jpg&rf=LaDigue_1920x1080.jpg&pid=hp