Dart obtém o elemento das trilhas de String usando RegExp

Question

quando eu recupero dados do URL do nosso site, que retorna esta saída em um dos campos da API restante e tento descobrir se tracksestá contido, obtenho o url daquele que nesta tracksfonte abaixo é que eu preciso obter

String test = """
<div class=\"wp-playlist wp-audio-playlist wp-playlist-light\">\n
<div class=\"wp-playlist-current-item\"></div>\n
<p>\t\t<audio controls=\"controls\" preload=\"none\" width=\"\n\t\t\t\t1118\t\"\n\t\t>
</audio></p>\n<div class=\"wp-playlist-next\"></div>\n<div class=\"wp-playlist-prev\">
</div>\n<p>\t<noscript></p>\n<ol>\n<li>
<a href='https://www.caferilik.com/wp-content/uploads/2020/11/Anne-Baba-Biz-Suçluyuz-Muhafazakar-Ailelerde-Kuşak-Çatışması-Sesli-Kitap-www.caferilik.com_.mp3'>
Anne Baba Biz Suçluyuz - Muhafazakar Ailelerde Kuşak Çatışması (Sesli Kitap) www.caferilik.com<
/a></li>\n</ol>\n<p>\t</noscript><br />\n\t
<script type=\"application/json\" class=\"wp-playlist-script\">
{\"type\":\"audio\",\"tracklist\":true,\"tracknumbers\":true,\"images\":true,\"artists\":true,
\"tracks\":[{\"src\":\"https:\\/\\/www.caferilik.com\\/wp-content\\/uploads\\/2020\\/11\\/Anne-Baba-Biz-Su\\u00e7luyuz-Muhafazakar-Ailelerde-Ku\\u015fak-\\u00c7at\\u0131\\u015fmas\\u0131-Sesli-Kitap-www.caferilik.com_.mp3\",
\"type\":\"audio\\/mpeg\",\"title\":\"Anne Baba Biz Su\\u00e7luyuz - Muhafazakar Ailelerde Ku\\u015fak \\u00c7at\\u0131\\u015fmas\\u0131 (Sesli Kitap) www.caferilik.com\",\"caption\":\"\",
\"description\":\"\\\"Anne Baba Biz Su\\u00e7luyuz - Muhafazakar Ailelerde Ku\\u015fak \\u00c7at\\u0131\\u015fmas\\u0131 (Sesli Kitap) www.caferilik.com\\\".\",\"meta\":{\"length_formatted\":\"2:28:02\"},
\"image\":{\"src\":\"https:\\/\\/www.caferilik.com\\/wp-includes\\/images\\/media\\/audio.png\",\"width\":48,\"height\":64},\"thumb\":
{\"src\":\"https:\\/\\/www.caferilik.com\\/wp-includes\\/images\\/media\\/audio.png\",\"width\":48,\"height\":64}}]}</script>\n</div>\n
""";

test = test.replaceAll('\n', '').replaceAll('\t', '').replaceAll('\\', '');

posso encontrar muitos RegExppara obter a linkpartir de string, mas preciso obter a fonte detracks

Answer 1

Usar

"tracks":\[{"src":"([^"]+)

Veja a prova . Ao colocá-lo dentro do código, o valor necessário estará no primeiro grupo.

Explicação

--------------------------------------------------------------------------------
  "tracks":                '"tracks":'
--------------------------------------------------------------------------------
  \[                       '['
--------------------------------------------------------------------------------
  {"src":"                 '{"src":"'
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  (                        group and capture to \1:
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    [^"]+                    any character except: '"' (1 or more
                             times (matching the most amount
                             possible))
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  )                        end of \1