Retrieve embedded youtube video ID with regex java

Question

I'm trying to use regex in order to retrieve youtube video ID (embedded)

Assuming the following urls:

http://www.youtube.com/embed/f0Cn2g8ekMQ/
http://www.youtube.com/embed/f0Cn2g8ekMQ//
http://www.youtube.com/embed/f0Cn2g8ekMQ?param

I'd like to get the ID "f0Cn2g8ekMQ".

I was trying to do it this way:

regex: https?://www\.youtube\.com/embed/(\S+)[/|\?]?.*

But it seems like the or operator doesn't work for me and the ID I recieve include the "/" or "?" and the rest of the string.

Is there any good way to do it with regex?

Thanks!

Doqnach · Accepted Answer · 2017-05-14 11:25:06Z

1

This should work for you. Note the escaped / (slashes)

/https?:\/\/www\.youtube\.com\/embed\/([^\/?]+)/g

https://regex101.com/r/57JeRU/1

For details, also check the code generator for JAVA.

answered May 14, 2017 at 11:25

Doqnach

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5 Comments

idogo Over a year ago

Thanks. But ask far as I know you don't have to escape slashes, am I right?

Doqnach Over a year ago

Depends on the programming language or tool you are using. As I stated: check the code generator for details on the proper way to do this in JAVA code.

jj27 Over a year ago

It works with java parser with or without escaping them.

idogo Over a year ago

Thanks. but shouldn't the question mark be escaped too?

Doqnach Over a year ago

@idogo this is not needed for ? (and . (dot)) within a [] character class

Young Emil · Accepted Answer · 2017-05-14 11:31:58Z

If you are very sure that the structure of the url is alway following the example you are using the you can use this:

    try{
        String add1 = "http://www.youtube.com/embed/f0Cn2g8ekMQ/";
        String add2 = "http://www.youtube.com/embed/f0Cn2g8ekMQ//";
        String add3 = "http://www.youtube.com/embed/f0Cn2g8ekMQ?param";

        String []all1 = add1.replace("//", "/").split("[/?]");
        String []all2 = add2.replace("//", "/").split("[/?]");
        String []all3 = add3.replace("//", "/").split("[/?]");

        System.out.println(all1[3]);
        System.out.println(all2[3]);
        System.out.println(all3[3]);
    }catch(ArrayIndexOutOfBoundsException e){
        System.out.println("URL format changed");
        //Do other things here if url structure changes
    }

Output

f0Cn2g8ekMQ
f0Cn2g8ekMQ
f0Cn2g8ekMQ

Youcef LAIDANI · Accepted Answer · 2017-05-14 11:32:00Z

0

You can use this regex \/embed\/(\w+)[\/?] not you can get the result like so :

String[] str = {"http://www.youtube.com/embed/f0Cn2g8ekMQ/",
    "http://www.youtube.com/embed/f0Cn2g8ekMQ//",
    "http://www.youtube.com/embed/f0Cn2g8ekMQ?param"};

Pattern p = Pattern.compile("\\/embed\\/(\\w+)[\\/?]");
Matcher m;
for (String s : str) {
    m = p.matcher(s);
    if (m.find()) {
        System.out.println(m.group(1));
    }
}

Outputs

f0Cn2g8ekMQ
f0Cn2g8ekMQ
f0Cn2g8ekMQ

Ideone demo

answered May 14, 2017 at 11:32

Youcef LAIDANI

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