regex - 检查字符串是否有效，位智实时 map 链接

Question

我正在尝试检查字符串是否是Waze Live Map中的有效深层链接。 Waze Live Map深层链接看起来像这样:https://www.waze.com/ul?place=ChIJj61dQgK6j4AR4GeTYWZsKWw&ll=37.42199990%2C-122.08405750&navigate=yes给定一个字符串，我想知道它是否是有效的位智实时 map 链接。最重要的是，我想知道它是否至少具有经度和纬度。
我尝试了以下方法:

String str = 'https://www.waze.com/ul?place=ChIJj61dQgK6j4AR4GeTYWZsKWw&ll=37.42199990%2C-122.08405750&navigate=yes'; 
var wazeUrlPattern = r"https:\/\/www.waze.com\/ul\?ll\=(.)*([1-9]+\.[1-9]+)%2C([1-9]+\.[1-9]+)(.)?";
bool valid = new RegExp(wazeUrlPattern, caseSensitive:false).hasMatch(str);
if(!valid) {
    print("The url is not valid waze live map link!");
    return;
  }
// Do something with the longitude and latitude and maybe other parameters

这对我不起作用，我希望找出一些帮助。

Answer 1

使用

https://www\.waze\.com/ul\?.*?&ll=(-?\d+\.\d+)%2C(-?\d+\.\d+)

参见 proof
转义点以匹配文字点，您将拥有 ?ll，而URL中稍后有 ?place和 &ll=。另外，经度和纬度可能在前面带有可选的 -。
EXPLANATION

NODE                     EXPLANATION
--------------------------------------------------------------------------------
  https://www              'https://www'
--------------------------------------------------------------------------------
  \.                       '.'
--------------------------------------------------------------------------------
  waze                     'waze'
--------------------------------------------------------------------------------
  \.                       '.'
--------------------------------------------------------------------------------
  com/ul                   'com/ul'
--------------------------------------------------------------------------------
  \?                       '?'
--------------------------------------------------------------------------------
  .*?                      any character except \n (0 or more times
                           (matching the least amount possible))
--------------------------------------------------------------------------------
  &ll=                     '&ll='
--------------------------------------------------------------------------------
  (                        group and capture to \1:
--------------------------------------------------------------------------------
    -?                       '-' (optional (matching the most amount
                             possible))
--------------------------------------------------------------------------------
    \d+                      digits (0-9) (1 or more times (matching
                             the most amount possible))
--------------------------------------------------------------------------------
    \.                       '.'
--------------------------------------------------------------------------------
    \d+                      digits (0-9) (1 or more times (matching
                             the most amount possible))
--------------------------------------------------------------------------------
  )                        end of \1
--------------------------------------------------------------------------------
  %2C                      '%2C'
--------------------------------------------------------------------------------
  (                        group and capture to \2:
--------------------------------------------------------------------------------
    -?                       '-' (optional (matching the most amount
                             possible))
--------------------------------------------------------------------------------
    \d+                      digits (0-9) (1 or more times (matching
                             the most amount possible))
--------------------------------------------------------------------------------
    \.                       '.'
--------------------------------------------------------------------------------
    \d+                      digits (0-9) (1 or more times (matching
                             the most amount possible))
--------------------------------------------------------------------------------
  )                        end of \2