Having trouble extracting the Top-Level Domain from a URL

Question

Having trouble extracting the Top-Level Domain from a URL

I'm struggling to find a reliable way to extract the Top-Level Domain from a URL. The challenge I'm facing is that the URLs entered by users can vary greatly - they might enter www.google.com, m.google.com, m.google.uk, google.uk, or www.m.google.com.

I attempted using the slice method, but it didn't yield the desired results because some URLs contain 2 or 3 characters. Splitting based on "." also proved problematic as the number of resulting parts could be 2, 3, or even 4. Is there a JavaScript function available that can accomplish this in a single line? Are there any convenient custom functions to tackle this?

Most resources suggest retrieving the host name, but my goal is to specifically isolate the last 2 or 3 characters of the URL (such as com, uk, cn, etc.). While I could implement multiple if-else loops, I'd prefer a simpler solution that avoids this level of complexity.

I aim to obtain an output like 'com', 'uk', or 'cn' depending on the top-level domain in the URL. Since users input the URL, predicting whether they will type m.google.com, www.m.google.com, www.google.com, or simply google.com adds an additional layer of uncertainty.

javascript string selenium protractor

Answer 1

Answer №1

An effective strategy to achieve this:

const detector = document.createElement('a');

detector.href = "http://www.yahoo.com/path/";
console.log(detector.hostname); // "www.yahoo.com"

detector.href = "http://m.yahoo.com/path/";
console.log(detector.hostname); // "m.yahoo.com"

detector.href = "http://www.m.yahoo.com/path/";
console.log(detector.hostname); // "www.m.yahoo.com"

Answer 2

An effective strategy to achieve this:

const detector = document.createElement('a');

detector.href = "http://www.yahoo.com/path/";
console.log(detector.hostname); // "www.yahoo.com"

detector.href = "http://m.yahoo.com/path/";
console.log(detector.hostname); // "m.yahoo.com"

detector.href = "http://www.m.yahoo.com/path/";
console.log(detector.hostname); // "www.m.yahoo.com"

Answer 3

Answer №2

I've found success with the code below. Big thanks to @StephenP for your assistance. Also, shoutout to @Timo although it seems Document is not recognized in the protractor library.

var parser = TextBox.siteName;//retrieve user input for site into parser variable.
 var hostParts = parser.split('.');
    var URLdomain = hostParts[hostParts.length - 1];

Answer 4

I've found success with the code below. Big thanks to @StephenP for your assistance. Also, shoutout to @Timo although it seems Document is not recognized in the protractor library.

var parser = TextBox.siteName;//retrieve user input for site into parser variable.
 var hostParts = parser.split('.');
    var URLdomain = hostParts[hostParts.length - 1];

Answer 5

Answer №3

To determine the Top Level Domain (TLD), look for the final period (.) after isolating the domain.

Try testing it here: https://example.com/sample-link

var websites = [
  'apple.net',              // should show 'net'
  'https://bing.org.au',     // should display 'au'
  'amazon.jp/products/item', // should indicate 'jp'
  'ftp:///usr/docs'          // should not work
];

for (var key in addresses) {
    console.log(getTLD(websites[key]));
}

function getTLD(url) {
    // manage exceptions
    if (typeof url == 'undefined' || url.indexOf('ftp:///') != -1)
        return undefined;

    var section = url;

    // eliminate http://
    if (section.includes('//'))
        section = part.split('//')[1];

    // isolate the domain
    if (part.includes('/'))
        section = part.split('/')[0];  

    // identify TLD
    if (section.includes('.')) {
        var allParts = section.split('.');
        section = allParts[allParts.length - 1]; 
    }
    return section;
}

Answer 6

To determine the Top Level Domain (TLD), look for the final period (.) after isolating the domain.

Try testing it here: https://example.com/sample-link

var websites = [
  'apple.net',              // should show 'net'
  'https://bing.org.au',     // should display 'au'
  'amazon.jp/products/item', // should indicate 'jp'
  'ftp:///usr/docs'          // should not work
];

for (var key in addresses) {
    console.log(getTLD(websites[key]));
}

function getTLD(url) {
    // manage exceptions
    if (typeof url == 'undefined' || url.indexOf('ftp:///') != -1)
        return undefined;

    var section = url;

    // eliminate http://
    if (section.includes('//'))
        section = part.split('//')[1];

    // isolate the domain
    if (part.includes('/'))
        section = part.split('/')[0];  

    // identify TLD
    if (section.includes('.')) {
        var allParts = section.split('.');
        section = allParts[allParts.length - 1]; 
    }
    return section;
}

Having trouble extracting the Top-Level Domain from a URL

Answer №1

Answer №2

Answer №3

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