Should guard SL feed empty URL about likecoin-app

[edmondyu]

入 Brave browser 登入 Liker Land 後，行 https://liker.land/api/reader/superlike/followed 出以下 result:

{
  "list": [
    {
      "superLikeID": "1411226014995848",
      "referrer": "https://bchai.cc/2020/08/07/drink-a-toast/",
      "ts": 1596849268242,
      "user": "edmondyu",
      "liker": "brenday"
    },
    {
      "superLikeID": "1410317231835580",
      "referrer": "https://www.sun-line.idv.tw/blog/?p=3307",
      "ts": 1596821938341,
      "user": "sunline58311",
      "liker": "sunline58311"
    },
    {
      "superLikeID": "1410131879489283",
      "referrer": "https://medium.com/heidiluocreative/11%E5%80%8B%E6%89%93%E9%80%A0%E5%AE%8C%E7%BE%8E%E7%9D%A1%E7%9C%A0%E7%92%B0%E5%A2%83%E7%9A%84%E7%A2%BA%E8%AA%8D%E6%B8%85%E5%96%AE-452c170a449d",
      "ts": 1596816339470,
      "user": "heidiluo",
      "liker": "ngwingtat"
    },
    {
      "superLikeID": "1409956168983170",
      "referrer": "https://madman-magazine.com/blog/coca-cola/",
      "ts": 1596810358803,
      "user": "madmanmonologue",
      "liker": "madmanmonologue"
    },
    {
      "superLikeID": "1409898637816074",
      "referrer": "https://vocus.cc/@sunline/5f2d10f2fd89780001c2f9d0",
      "ts": 1596808104990,
      "user": "sunline58311",
      "liker": "sunline58311"
    },
    {
      "superLikeID": "1409802782475956",
      "referrer": "https://thestandnews.com/art/%E5%81%9A%E5%9C%B0%E7%9B%A430%E5%B9%B4-%E4%BB%96%E5%89%9B%E8%AE%80%E5%AE%8C%E8%97%9D%E8%A1%93%E5%AD%B8%E5%A3%AB-%E5%B0%88%E8%A8%AA70%E6%AD%B2%E4%BD%95%E5%A5%87%E7%87%84/",
      "ts": 1596803431479,
      "user": "standnews",
      "liker": "ettachan"
    },
    {
      "superLikeID": "1409774679053956",
      "referrer": "https://clipversity.com/article/-MDsu4AQIRSpe5CZ_4G0",
      "ts": 1596801767954,
      "user": "oneming",
      "liker": "clipversity"
    },
    {
      "superLikeID": "1409591670028576",
      "referrer": "",
      "ts": 1596791306332,
      "user": "familyonlinetv",
      "liker": "drthankyouc"
    },
    {
      "superLikeID": "1409589458416865",
      "referrer": "https://medium.com/@veryotaku/%E5%A6%82%E4%BD%95%E7%94%A8likecoin%E8%B2%B7civic-liker%E6%9C%83%E7%B1%8D-b2cc143650b4",
      "ts": 1596790766409,
      "user": "veryotaku",
      "liker": "withthepoons"
    },
    {
      "superLikeID": "1409523361367737",
      "referrer": "https://thestandnews.com/nature/%E5%8B%87%E9%97%96%E9%9D%92%E8%9B%99%E7%9B%B4%E8%85%B8%E5%B9%B3%E5%AE%89%E7%84%A1%E4%BA%8B%E7%9A%84%E7%94%B2%E8%9F%B2/",
      "ts": 1596787158659,
      "user": "siufeiball",
      "liker": "edmondyu"
    },
    {
      "superLikeID": "1409462579504288",
      "referrer": "https://www.youput.org/Articles/Details/37bd86d8-f770-4f30-935a-7774dd45a34d",
      "ts": 1596784507396,
      "user": "a0936777705",
      "liker": "a0936777705"
    },
    {
      "superLikeID": "1409419519175158",
      "referrer": "https://thestandnews.com/politics/%E6%B8%AF%E7%89%88%E5%9C%8B%E5%AE%89%E6%B3%95%E5%AF%A6%E6%96%BD%E7%B4%B0%E5%89%87%E5%88%8A%E6%86%B2-%E4%BF%9D%E5%AE%89%E5%B1%80%E5%8F%AF%E7%94%B3%E8%AB%8B%E5%87%8D%E7%B5%90%E6%B6%89%E6%A1%88%E8%B2%A1%E7%94%A2-%E7%B7%8A%E6%80%A5%E6%83%85%E6%B3%81%E8%AD%A6%E6%96%B9%E8%87%AA%E6%89%B9%E5%85%A5%E5%B1%8B%E6%90%9C%E8%AD%89/",
      "ts": 1596782001721,
      "user": "standnews",
      "liker": "ckxpress"
    },
    {
      "superLikeID": "1409388471676207",
      "referrer": "https://medium.com/@veryotaku/%E5%A6%82%E4%BD%95%E7%94%A8likecoin%E8%B2%B7civic-liker%E6%9C%83%E7%B1%8D-b2cc143650b4",
      "ts": 1596780272997,
      "user": "veryotaku",
      "liker": "veryotaku"
    },
    {
      "superLikeID": "1409351586585302",
      "referrer": "https://thestandnews.com/society/%E8%A8%98%E4%B8%80%E5%80%8B%E7%B4%B0%E5%BA%AD%E7%9A%84%E8%A5%B2%E8%AD%A6%E6%A1%88-%E8%BE%AF%E6%96%B9%E5%A4%A7%E7%8B%80%E5%90%91%E4%BB%96%E7%9A%84client%E8%AA%AA-%E5%A0%82%E5%A0%82%E6%AD%A3%E6%AD%A3%E8%A1%8C%E5%87%BA%E5%8E%BB/",
      "ts": 1596778924282,
      "user": "chengmeichi2016",
      "liker": "wrightfu"
    },
    {
      "superLikeID": "1408946032592519",
      "referrer": "https://madman-magazine.com/blog/doraemon/",
      "ts": 1596764829583,
      "user": "madmanmonologue",
      "liker": "madmanmonologue"
    },
    {
      "superLikeID": "1407968919225303",
      "referrer": "https://vocus.cc/@sunline/5f2b7447fd89780001b02a5a",
      "ts": 1596735109792,
      "user": "sunline58311",
      "liker": "sunline58311"
    },
    {
      "superLikeID": "1407667433506251",
      "referrer": "https://techmoon.xyz/how-to-crack-download-limit-of-baidu-netdisk/",
      "ts": 1596727299065,
      "user": "slivenred",
      "liker": "chiyi4488"
    },
    {
      "superLikeID": "1407644562008368",
      "referrer": "https://nowtostart.com/epic/",
      "ts": 1596726646540,
      "user": "liliumhuang",
      "liker": "edmondyu"
    },
    {
      "superLikeID": "1407632744630435",
      "referrer": "https://www.youput.org/Articles/Details/a16df58a-3113-4c0f-bd18-a4f5ff1062b9",
      "ts": 1596726496552,
      "user": "a0936777705",
      "liker": "a0936777705"
    },
    {
      "superLikeID": "1407559425265069",
      "referrer": "https://vocus.cc/@yochen/5e8a0671fd89780001c22baf",
      "ts": 1596724306404,
      "user": "yochen8361",
      "liker": "wrightfu"
    }
  ]
}

[nwingt]

Seems one of the SL from the feed is causing error

{
  "superLikeID": "1409591670028576",
  "referrer": "",
  "ts": 1596791306332,
  "user": "familyonlinetv",
  "liker": "drthankyouc"
}

[nwingt]

Applied patch to the API
Need to guard this issue