How to redirect all requests to a specific domain

问题:

I set up the SSL and custom domain name for my website on the App Engine.

It works perfectly fine: I can go to https://www.mywebsite.com and the page loads.

But I would like to make the following change.

If I go to mywebsite.com, I would to be redirected immediately to https://www.mywebsite.com .

How can I do that ?

回答1:

if you are using expressjs then this code below will do it.

            app.get('*', function (req, res, next) {

            var checkHost = req.get('host').substring(0, 4);
            var condition = req.get('x-forwarded-proto') !== "https" || checkHost !== 'www.' || ( req.get('host').indexOf('www.') < 0);
            if (condition) {
                res.set('x-forwarded-proto', 'https');

                if (checkHost === 'www.' && ( req.get('host').indexOf('www.') >= 0)) {
                    res.redirect('https://' + req.get('host') + req.url);
                }
                else {
                    res.redirect('https://www.' + req.get('host') + req.url);
                }
                } else {
                    next();
                }
            });

回答2:

You can put this before you start adding routes. It will inspect the protocol of each request and redirect to the https version if it is coming in over http

app.use(function(req, res, next) {
   if (req.protocol === 'http') {
      var host = req.host.replace('www.', '');
      return res.redirect('https://www.' + host + req.originalUrl);
   }
   next();
});

Note that if nginx/apache is handling the https stuff and forwarding to a non-https node server this will not suffice. You will need to look at headers in your conditional rather than req.protocol (something like the conditional that @Asif has)

回答3:

You need to create .htaccess file at root of your server for redirect.

.htaccess file

<IfModule mod_rewrite.c>
RewriteEngine On 
RewriteCond %{SERVER_PORT} 80 
RewriteCond %{REQUEST_URI} folder 
RewriteRule ^(.*)$ https://www.urserver.com/folder/$1 [R,L]
</IfModule>

using upper you can redirect to your domain

回答4:

You could also map your naked domain mywebsite.com to your GAE app, in addition to your www.mywebsite.com. Basically by repeating the procedure for Adding a custom domain for your application and selecting the naked domain at step 4 (emphasis mine):

Continue to the next step of the Add new custom domain form and select the custom domain you want to point to your App Engine app:

• Specify the domain and subdomains you want to map.

  Note: The naked domain and www subdomain are prepopulated in the form.

  • A naked domain, such as example.com, maps to http://example.com.
  • A subdomain, such as www, maps to http://www.example.com.

• Click Submit mappings to create the desired mapping.

Pros:

• simpler
• works for both standard and flex env apps, regardless of the app's language
• works for static content as well, unlike solutions based on app code changes

Cons:

• at least for the standard env apps there may be 2 redirects for https requests:

  • the 1st one is a 301 redirect to http://www.mywebsite.com
  • the 2nd one is a 302 redirect to https://www.mywebsite.com