使用 JavaScript 获取没有子域的域名？
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Get domain name without subdomains using JavaScript?
提问by pmcilreavy
How to get the domain name without subdomains?
如何获取没有子域的域名？
e.g. if the url is "http://one.two.roothost.co.uk/page.html" how to get "roothost.co.uk"?
例如，如果 url 是“ http://one.two.roothost.co.uk/page.html”，如何获得“roothost.co.uk”？
回答by Maximillian Laumeister
Following is a solution to extract a domain name without any subdomains. This solution doesn't make any assumptions about the URL format, so it should work for any URL. Since some domain names have one suffix (.com), and some have two or more (.co.uk), to get an accurate result in all cases, we need to parse the hostname using the Public Suffix List, which contains a list of all public domain name suffixes.
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.
Solution
解决方案
First, include the public suffix list js apiin a script tag in your HTML, then in JavaScript to get the hostname you can call:
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);
...which will return "roothost.co.uk". To get the name from the current page, you can use location.hostnameinstead of a static string:
...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);
Finally, if you need to parse a domain name directly out of a full URL string, you can use the following:
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 Example(it includes the entire minified library in the jsFiddle, so scroll down!): https://jsfiddle.net/6aqdbL71/2/
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/
回答by sidanmor
This works for me:
这对我有用：
var 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|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('|');
var 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|fl?|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('|');
var removeSubdomain = function (s) {
s = s.replace(/^www\./, '');
var 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',
};
var 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|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('|');
var 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|fl?|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('|');
var removeSubdomain = function (s) {
s = s.replace(/^www\./, '');
var 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 + '"');
}
}
}Referance:
参考资料：
回答by Alvaro
What about...
关于什么...
function getDomain(){
if(document.domain.length){
var parts = document.domain.replace(/^(www\.)/,"").split('.');
//is there a subdomain?
while(parts.length > 2){
//removing it from our array
var subdomain = parts.shift();
}
//getting the remaining 2 elements
var domain = parts.join('.');
return domain.replace(/(^\.*)|(\.*$)/g, "");
}
return '';
}
回答by PHP Magento Developer
My solution worked for me: Get "gocustom.com" from "shop.gocustom.com"
我的解决方案对我有用：从“shop.gocustom.com”获取“gocustom.com”
var site_domain_name = 'shop.gocustom.com';
alert(site_domain_name);
var strsArray = site_domain_name.split('.');
var strsArrayLen = strsArray.length;
alert(strsArray[eval(strsArrayLen - 2)]+'.'+strsArray[eval(strsArrayLen - 1)])
回答by Dinesh Chitlangia
Here is a working JSFiddle
这是一个有效的JSFiddle
My solution works with the assumption that the root hostname you are looking for is of the type "abc.xyz.pp".
我的解决方案假设您要查找的根主机名属于“abc.xyz.pp”类型。
extractDomain()returns the hostname with all the subdomains.
getRootHostName()splits the hostname by .and then based on the assumption mentioned above, it uses the shift()to remove each subdomain name.
Finally, whatever remains in parts[], it joins them by .to form the root hostname.
extractDomain()返回包含所有子域的主机名。
getRootHostName()拆分主机名.，然后根据上面提到的假设，它使用shift()来删除每个子域名。最后，无论剩下什么parts[]，它都会将它们连接起来.形成根主机名。
Javascript
Javascript
var urlInput = "http://one.two.roothost.co.uk/page.html";
function extractDomain(url) {
var domain;
//find & remove protocol (http, ftp, etc.) and get domain
if (url.indexOf("://") > -1) {
domain = url.split('/')[2];
} else {
domain = url.split('/')[0];
}
//find & remove port number
domain = domain.split(':')[0];
return domain;
}
function getRootHostName(url) {
var parts = extractDomain(url).split('.');
var partsLength = parts.length - 3;
//parts.length-3 assuming root hostname is of type abc.xyz.pp
for (i = 0; i < partsLength; i++) {
parts.shift(); //remove sub-domains one by one
}
var rootDomain = parts.join('.');
return rootDomain;
}
document.getElementById("result").innerHTML = getRootHostName(urlInput);
HTML
HTML
<div id="result"></div>
EDIT 1: Updated the JSFiddle link. It was reflecting the incorrect code.
编辑 1：更新了 JSFiddle 链接。它反映了不正确的代码。
回答by Nikhil.nj
You can try this in JavaScript:
你可以试试这个JavaScript：
alert(window.location.hostname);
It will return the hostname.
它将返回主机名。
