如何仅让主域名实现HTTP转HTTPS重定向，排除附加域名？

Got it, let's sort out this issue where your current .htaccess setup is redirecting all add-on domains to HTTPS along with your main domain. The problem with your existing code is that %{SERVER_NAME} matches any domain pointing to your server, so we need to add a condition to target only your main domain specifically.

Modified .htaccess Code (Target Only Main Domain) #

# Enable rewrite engine
RewriteEngine On

# Target only your main domain (replace with your actual domain)
RewriteCond %{HTTP_HOST} ^your-main-domain\.com$ [NC]
# Check if connection is not using HTTPS
RewriteCond %{HTTPS} !=on
# Redirect to HTTPS version of the main domain
RewriteRule ^/?(.*) https://your-main-domain.com/$1 [R=301,L]

Breakdown of the Changes: #

• The first RewriteCond checks if the requested domain exactly matches your main domain. The [NC] flag makes this check case-insensitive, so it works for variations like Your-Main-Domain.com too.
• We keep the existing RewriteCond to verify the connection isn't over HTTPS.
• The RewriteRule now explicitly uses your main domain instead of %{SERVER_NAME}, which ensures only traffic to your main domain gets redirected.

Optional: Handle Both www and Non-www Main Domain Variations #

If you want to redirect both your-main-domain.com and www.your-main-domain.com to a canonical HTTPS version, use this code instead:

RewriteEngine On

# Match either www or non-www version of your main domain
RewriteCond %{HTTP_HOST} ^(www\.)?your-main-domain\.com$ [NC]
RewriteCond %{HTTPS} !=on
# Redirect to your preferred canonical HTTPS version (adjust to non-www if needed)
RewriteRule ^/?(.*) https://www.your-main-domain.com/$1 [R=301,L]

Just remember to replace your-main-domain.com with your actual main domain in all instances. For testing, you can use [R,L] first (temporary redirect) and switch to [R=301,L] once confirmed (301 is permanent and better for SEO).

内容的提问来源于stack exchange，提问作者Yogeswaran