Question

JavaScript: Redirect to https with no www

Asked by: hankknight

Using JavaScript, I want to redirect to https://example.com/page if a page is accessed via http:// or using a subdomain.

So:
http://example.com/
Should be redirected to:
https://example.com/

https://www.example.com/
Should be redirected to:
https://example.com/

http://www.example.com/sub/dir/page.html
Should be redirected to:
https://example.com/sub/dir/page.html

... And so forth

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Asked On
2009-10-19 at 04:43:33ID24823198
Topic

JavaScript

Participating Experts
4
Points
500
Comments
16

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Answers

 

by: alain34Posted on 2009-10-19 at 04:48:51ID: 25604270

Hello hankknight,

Should do the trick

<html>
<head>
<script>
function redirect() {
if (window.location.href.substring(0,7) == 'http://') {
   window.location = 'https://' + window.location.href.substring(7,window.location.href.length);
   }
}
</script>
<title>Test</title>
</head>
<body onload='redirect()'>
TEST
</body>
 </html>

Regards,

alain34

 

by: TheFootPosted on 2009-10-19 at 04:57:09ID: 25604322

Just to add to alain34's solution; using window.location.protocol might make the code smaller and easier..

function redirect() {
  if (window.location.protocol == 'http:') {
   window.location = 'https://' + window.location.host + window.location.pathname;
   }
}

                                              
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by: hankknightPosted on 2009-10-19 at 04:59:16ID: 25604334

Thanks, that answers half my question.  Subdomains should also be redirected.

http://www.example.com/sub/dir/page.html
Should be redirected to:
https://example.com/sub/dir/page.html

and

https://www.example.com/sub/dir/page.html
Should be redirected to:
https://example.com/sub/dir/page.html

 

by: mplungjanPosted on 2009-10-19 at 05:02:10ID: 25604351

erm...

if (location.protocol != 'https') {
 loc = "https://"
 loc += (location.host.toLowerCase().indexOf('www')==0) ?location.host.substring(4):location.host;
 location.replace(loc+'/'+location.pathname+location.search+location.hash)
}

you can leave out the hash if you do not have #asdasd

 

by: mplungjanPosted on 2009-10-19 at 05:02:51ID: 25604355

Drat - was typing too slow and got interrupted

 

by: alain34Posted on 2009-10-19 at 05:27:51ID: 25604500

all solution should work for subdomain as well

 

by: hankknightPosted on 2009-10-19 at 05:30:26ID: 25604515

mplungjan, your idea seems to create an endless loop.  Could you please test it?  The other ideas do not address the www issue.

Thanks!

 

by: TheFootPosted on 2009-10-19 at 05:39:26ID: 25604581

mplugjans method works for me with the following change:

(Addition of colon)

if (location.protocol != 'https:') {

                                              
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by: mplungjanPosted on 2009-10-19 at 06:13:46ID: 25604825

Yes, sorry about the missing colon

 

by: hankknightPosted on 2009-10-19 at 06:44:15ID: 25605062

Hmmm, that does not work with www either.  None of these test for www, just for https:

https://www.example.com/sub/dir/page.html
Should be redirected to:
https://example.com/sub/dir/page.html

 

by: mplungjanPosted on 2009-10-19 at 06:46:24ID: 25605075

Can you try this:

<script>
 
if (location.protocol != 'https:') {
 loc = "https://"
 loc += (location.host.toLowerCase().indexOf('www')==0) ?location.host.substring(4):location.host;
 loc += '/'+location.pathname+location.search; // +location.hash;
 alert(loc)
 location.replace(loc)
}
 
</script>

                                              
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by: mplungjanPosted on 2009-10-19 at 06:47:32ID: 25605086

Oh, just a sec

 

by: mplungjanPosted on 2009-10-19 at 06:53:59ID: 25605134

Here

<script>
var changeIt = false;
if (location.protocol != 'https:') {
 loc = "https://";
 changeIt = true;
} 
if (location.host.toLowerCase().indexOf('www')==0) {
  loc +=location.host.substring(4)
  changeIt=true;
}  
else loc += location.host;
if (changeIt) {
  loc += '/'+location.pathname+location.search; // +location.hash;
  alert(loc)
  location.replace(loc)
} 
</script>
                                              
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by: hankknightPosted on 2009-10-19 at 08:26:03ID: 25606037

It does not work.

First I got an error so I added var loc; to the top but now my redirected urls look like this:

https://www.example.com/undefinedexample.com

 

by: mplungjanPosted on 2009-10-19 at 09:03:46ID: 25606438

aha,

please do

var loc="";

to the top

 

by: qTopPosted on 2009-10-27 at 02:17:45ID: 25670386

Hi.

Try this:

var url = "http://www.example.com/sub/dir/page.html"; // defining the url variable 
url = url.replace(/^(http[s]?:\/\/)?(www\.)?(\w+\.[a-z]{2,5}.*)$/, 'https://$3'); 
// testing
alert(url)

                                              
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