Extract link from html in flutter - html

Question

I am trying to extract a link from an HTML body which is coming from a response . Then message looks like this "content":
{
"rendered":
"<div style=
"padding: 56.25% 0 0 0;
position: relative;">
<iframe style=
"position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;"
title="Shrewsberry"
src="https://player.vimeo.com/video/1000224?h=23334&badge=0&autopause=0&player_id=0&app_id=58479\"
frameborder="0"
allowfullscreen="allowfullscreen">
</iframe>
</div>"}
I want to get the content inside 'src="https://player.vimeo.com/video/1000224?' can anyone help .
This is my code which i use
final value = parse(html); // html is the value from response
String parsedString = parse(value.body!.text).documentElement!.text;
print(parsedString);

Answer 1

You can use this simple logic if your URL always ends with ?
void main(){
String x='"content": { "rendered": "<div style="padding: 56.25% 0 0 0; position: relative;"><iframe style="position: absolute; top: 0; left: 0; width: 100%; height: 100%;" title="Shrewsberry" **src="https://player.vimeo.com/video/1000224?**h=23334&badge=0&autopause=0&player_id=0&app_id=58479" frameborder="0" allowfullscreen="allowfullscreen">\n"}';
int start= x.indexOf('src');
int end= x.indexOf('?');
print(x.substring(start,end+1));
}

Answer 2

You can use Regex to extract the string from your original string. Given the fact that it looks like HTML I ignored the ** you put in your answer.
In that case the regex (?<=src=").*?(?=") should work to retrieve the source. This will work for any source, not just Vimeo.
import 'dart:convert';
void main() {
String input = "\"content\": { \"rendered\": \"<div style=\"padding: 56.25% 0 0 0; position: relative;\"><iframe style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%;\" title=\"Shrewsberry\" **src=\"https://player.vimeo.com/video/1000224?\"h=23334&badge=0&autopause=0&player_id=0&app_id=58479\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\">\n\"}";
RegExp regex = new RegExp('(?<=src=").*?(?=")');
var match = regex.firstMatch(input);
if (match == null) {
print("No match found.");
return;
}
print("Result: " + match.group(0)!);
}
Output: Result: https://player.vimeo.com/video/1000224?