Redirect HTTP to HTTPS

Question

Web application was created as http 80, after few week they decided to switch it to https 443.
So they created AAM in CA, default zone for that WA is still http, internet zone is https.
In IIS for this WA someone already inserted https type in bindings.

At the moment, both paths are working, but users work on https. If anyone would insert httpin browser link would lead him/her to WA but as http.
I want to redirect if anyone would do try doing this in future, so if he enters http in browser, it would redirect him to https.

I tried deleting http binding of that WA from IIS. Didn't work well.
Next thing I tried is to put in Error pages additional item, here. Basically, here was added new error page of status code 403.4 with response action Respond with 302 redirect.
After this https worked but http reported 403 error.

This error (HTTP 403 Forbidden) means that Internet Explorer was able to connect to the website, but it does not have permission to view the webpage.

EDIT:
Print screen of AAM and IIS bindings

Answer 1

There are some online-tipps which recommend the use of the IIS Rewrite module. I do not prefer this way.

My preferred way is done with SharePoint AAMs and IIS-Bindings:

• Alternate Access Mappings: Configure your HTTPS URL in Default-Zone. Add an additional "Internal URL" and map it to the "Default" Zone. Should look like this:
• Add both the HTTP and the HTTPS binding to your IIS-Website:

This configuration will redirect your users from HTTP to HTTPS even if they call a subsite of SharePoint.

Answer 2

This can be done via a simple IIS redirect with a dummy web site.

Keep only the https AAM and bindings at Central Admin and IIS to have the site with https url - this should be in a non default zone.

Also, keep the default zone as is with the lost host name and with http url. This is mandatory for the search to operate and crawl the content. it wont work on https urls.

now, Create a dummy IIS web site with the binding is mapped to http url of the DNS name. in the IIS redirect section, create a 302 redirection to the actual https sharepoint site url.

so when ever the request comes to http then it would redirect to https url and all the regular direct https url will still respond back normally.

Answer 3

We solved problem by calling js document from master page.
In script, code basically checks if the url is http: If not do nothing, if yes convert to https.
Here is similar solutions.

if (location.protocol != 'https:')
{
 location.href = 'https:' + window.location.href.substring(window.location.protocol.length);