如何获取没有子域的域名？
例如，如果 url 是“ http://one.two.roothost.co.uk/page.html ”，如何获得“roothost.co.uk”？
使用 JavaScript 获取没有子域的域名？
IT技术
javascript
2021-03-16 16:52:15
6个回答
以下是提取没有任何子域的域名的解决方案。此解决方案不对 URL 格式做出任何假设，因此它应该适用于任何 URL。由于有些域名有一个后缀 ( .com)，有些有两个或多个 ( .co.uk)，为了在所有情况下都得到准确的结果，我们需要使用Public Suffix List解析主机名，其中包含所有公共域名后缀的列表.
解决方案
首先，在 HTML 的脚本标记中包含公共后缀列表 js api，然后在 JavaScript 中获取可以调用的主机名：
var parsed = psl.parse('one.two.roothost.co.uk');
console.log(parsed.domain);
...这将返回“roothost.co.uk”。要从当前页面获取名称，您可以使用location.hostname代替静态字符串：
var parsed = psl.parse(location.hostname);
console.log(parsed.domain);
最后，如果你需要直接从一个完整的 URL 字符串中解析出一个域名，你可以使用以下方法：
var url = "http://one.two.roothost.co.uk/page.html";
url = url.split("/")[2]; // Get the hostname
var parsed = psl.parse(url); // Parse the domain
document.getElementById("output").textContent = parsed.domain;
JSFiddle 示例（它包括jsFiddle 中的整个缩小库，所以向下滚动！）：https ://jsfiddle.net/6aqdbL71/2/
我创建了这个使用URL解析的函数。它通过假设所有主机名将具有 4 个或更少的部分来作弊。
const getDomainWithoutSubdomain = url => {
const urlParts = new URL(url).hostname.split('.')
return urlParts
.slice(0)
.slice(-(urlParts.length === 4 ? 3 : 2))
.join('.')
}
[
'https://www.google.com',
'https://www.google.co.uk',
'https://mail.google.com',
'https://www.bbc.co.uk/news',
'https://github.com',
].forEach(url => {
console.log(getDomainWithoutSubdomain(url))
})你可以用来parse-domain为你做繁重的工作。这个包考虑public suffix list并返回一个易于处理的对象分解域。
这是他们自述文件中的一个示例：
npm install parse-domain
import { parseDomain, ParseResultType } from 'parse-domain';
const parseResult = parseDomain(
// should be a string with basic latin characters only. more details in the readme
'www.some.example.co.uk',
);
// check if the domain is listed in the public suffix list
if (parseResult.type === ParseResultType.Listed) {
const { subDomains, domain, topLevelDomains } = parseResult;
console.log(subDomains); // ["www", "some"]
console.log(domain); // "example"
console.log(topLevelDomains); // ["co", "uk"]
} else {
// more about other parseResult types in the readme
}
这对我有用：
const firstTLDs = "ac|ad|ae|af|ag|ai|al|am|an|ao|aq|ar|as|at|au|aw|ax|az|ba|bb|be|bf|bg|bh|bi|bj|bm|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|cl|cm|cn|co|cr|cu|cv|cw|cx|cz|de|dj|dk|dm|do|dz|ec|ee|eg|es|et|eu|fi|fm|fo|fr|ga|gb|gd|ge|gf|gg|gh|gi|gl|gm|gn|gp|gq|gr|gs|gt|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|im|in|io|iq|ir|is|it|je|jo|jp|kg|ki|km|kn|kp|kr|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|me|mg|mh|mk|ml|mn|mo|mp|mq|mr|ms|mt|mu|mv|mw|mx|my|na|nc|ne|nf|ng|nl|no|nr|nu|nz|om|pa|pe|pf|ph|pk|pl|pm|pn|pr|ps|pt|pw|py|qa|re|ro|rs|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sx|sy|sz|tc|td|tf|tg|th|tj|tk|tl|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|yt".split('|');
const secondTLDs = "com|edu|gov|net|mil|org|nom|sch|caa|res|off|gob|int|tur|ip6|uri|urn|asn|act|nsw|qld|tas|vic|pro|biz|adm|adv|agr|arq|art|ato|bio|bmd|cim|cng|cnt|ecn|eco|emp|eng|esp|etc|eti|far|fnd|fot|fst|g12|ggf|imb|ind|inf|jor|jus|leg|lel|mat|med|mus|not|ntr|odo|ppg|psc|psi|qsl|rec|slg|srv|teo|tmp|trd|vet|zlg|web|ltd|sld|pol|fin|k12|lib|pri|aip|fie|eun|sci|prd|cci|pvt|mod|idv|rel|sex|gen|nic|abr|bas|cal|cam|emr|fvg|laz|lig|lom|mar|mol|pmn|pug|sar|sic|taa|tos|umb|vao|vda|ven|mie|北海道|和歌山|神奈川|鹿児島|ass|rep|tra|per|ngo|soc|grp|plc|its|air|and|bus|can|ddr|jfk|mad|nrw|nyc|ski|spy|tcm|ulm|usa|war|fhs|vgs|dep|eid|fet|fla|flå|gol|hof|hol|sel|vik|cri|iwi|ing|abo|fam|gok|gon|gop|gos|aid|atm|gsm|sos|elk|waw|est|aca|bar|cpa|jur|law|sec|plo|www|bir|cbg|jar|khv|msk|nov|nsk|ptz|rnd|spb|stv|tom|tsk|udm|vrn|cmw|kms|nkz|snz|pub|fhv|red|ens|nat|rns|rnu|bbs|tel|bel|kep|nhs|dni|fed|isa|nsn|gub|e12|tec|орг|обр|упр|alt|nis|jpn|mex|ath|iki|nid|gda|inc".split('|');
const knownSubdomains = "www|studio|mail|remote|blog|webmail|server|ns1|ns2|smtp|secure|vpn|m|shop|ftp|mail2|test|portal|ns|ww1|host|support|dev|web|bbs|ww42|squatter|mx|email|1|mail1|2|forum|owa|www2|gw|admin|store|mx1|cdn|api|exchange|app|gov|2tty|vps|govyty|hgfgdf|news|1rer|lkjkui";
function removeSubdomain(s) {
const knownSubdomainsRegExp = new RegExp(`^(${knownSubdomains})\.`, 'i');
s = s.replace(knownSubdomainsRegExp, '');
const parts = s.split('.');
while (parts.length > 3) {
parts.shift();
}
if (parts.length === 3 && ((parts[1].length > 2 && parts[2].length > 2) || (secondTLDs.indexOf(parts[1]) === -1) && firstTLDs.indexOf(parts[2]) === -1)) {
parts.shift();
}
return parts.join('.');
};
var tests = {
'www.sidanmor.com': 'sidanmor.com',
'exemple.com': 'exemple.com',
'argos.co.uk': 'argos.co.uk',
'www.civilwar.museum': 'civilwar.museum',
'www.sub.civilwar.museum': 'civilwar.museum',
'www.xxx.sub.civilwar.museum': 'civilwar.museum',
'www.exemple.com': 'exemple.com',
'main.testsite.com': 'testsite.com',
'www.ex-emple.com.ar': 'ex-emple.com.ar',
'main.test-site.co.uk': 'test-site.co.uk',
'en.tour.mysite.nl': 'tour.mysite.nl',
'www.one.lv': 'one.lv',
'www.onfdsadfsafde.lv': 'onfdsadfsafde.lv',
'aaa.onfdsadfsafde.aa': 'onfdsadfsafde.aa',
};
const firstTLDs = "ac|ad|ae|af|ag|ai|al|am|an|ao|aq|ar|as|at|au|aw|ax|az|ba|bb|be|bf|bg|bh|bi|bj|bm|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|cl|cm|cn|co|cr|cu|cv|cw|cx|cz|de|dj|dk|dm|do|dz|ec|ee|eg|es|et|eu|fi|fm|fo|fr|ga|gb|gd|ge|gf|gg|gh|gi|gl|gm|gn|gp|gq|gr|gs|gt|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|im|in|io|iq|ir|is|it|je|jo|jp|kg|ki|km|kn|kp|kr|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|me|mg|mh|mk|ml|mn|mo|mp|mq|mr|ms|mt|mu|mv|mw|mx|my|na|nc|ne|nf|ng|nl|no|nr|nu|nz|om|pa|pe|pf|ph|pk|pl|pm|pn|pr|ps|pt|pw|py|qa|re|ro|rs|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sx|sy|sz|tc|td|tf|tg|th|tj|tk|tl|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|yt".split('|');
const secondTLDs = "com|edu|gov|net|mil|org|nom|sch|caa|res|off|gob|int|tur|ip6|uri|urn|asn|act|nsw|qld|tas|vic|pro|biz|adm|adv|agr|arq|art|ato|bio|bmd|cim|cng|cnt|ecn|eco|emp|eng|esp|etc|eti|far|fnd|fot|fst|g12|ggf|imb|ind|inf|jor|jus|leg|lel|mat|med|mus|not|ntr|odo|ppg|psc|psi|qsl|rec|slg|srv|teo|tmp|trd|vet|zlg|web|ltd|sld|pol|fin|k12|lib|pri|aip|fie|eun|sci|prd|cci|pvt|mod|idv|rel|sex|gen|nic|abr|bas|cal|cam|emr|fvg|laz|lig|lom|mar|mol|pmn|pug|sar|sic|taa|tos|umb|vao|vda|ven|mie|北海道|和歌山|神奈川|鹿児島|ass|rep|tra|per|ngo|soc|grp|plc|its|air|and|bus|can|ddr|jfk|mad|nrw|nyc|ski|spy|tcm|ulm|usa|war|fhs|vgs|dep|eid|fet|fla|flå|gol|hof|hol|sel|vik|cri|iwi|ing|abo|fam|gok|gon|gop|gos|aid|atm|gsm|sos|elk|waw|est|aca|bar|cpa|jur|law|sec|plo|www|bir|cbg|jar|khv|msk|nov|nsk|ptz|rnd|spb|stv|tom|tsk|udm|vrn|cmw|kms|nkz|snz|pub|fhv|red|ens|nat|rns|rnu|bbs|tel|bel|kep|nhs|dni|fed|isa|nsn|gub|e12|tec|орг|обр|упр|alt|nis|jpn|mex|ath|iki|nid|gda|inc".split('|');
const knownSubdomains = "www|studio|mail|remote|blog|webmail|server|ns1|ns2|smtp|secure|vpn|m|shop|ftp|mail2|test|portal|ns|ww1|host|support|dev|web|bbs|ww42|squatter|mx|email|1|mail1|2|forum|owa|www2|gw|admin|store|mx1|cdn|api|exchange|app|gov|2tty|vps|govyty|hgfgdf|news|1rer|lkjkui";
function removeSubdomain(s) {
const knownSubdomainsRegExp = new RegExp(`^(${knownSubdomains})\.`, 'i');
s = s.replace(knownSubdomainsRegExp, '');
const parts = s.split('.');
while (parts.length > 3) {
parts.shift();
}
if (parts.length === 3 && ((parts[1].length > 2 && parts[2].length > 2) || (secondTLDs.indexOf(parts[1]) === -1) && firstTLDs.indexOf(parts[2]) === -1)) {
parts.shift();
}
return parts.join('.');
};
for (var test in tests) {
if (tests.hasOwnProperty(test)) {
var t = test;
var e = tests[test];
var r = removeSubdomain(test);
var s = e === r;
if (s) {
console.log('OK: "' + t + '" should be "' + e + '" and it is really "' + r + '"');
} else {
console.log('Fail: "' + t + '" should be "' + e + '" but it is NOT "' + r + '"');
}
}
}参考资料：
最简单的解决方案：
var domain='https://'+window.location.hostname.split('.')[window.location.hostname.split('.').length-2]+'.'+window.location.hostname.split('.')[window.location.hostname.split('.').length-1];
alert(domain);