域名重定向怎么办

# 错误的配置示例
RewriteEngine On
RewriteRule ^oldpage$ http://newdomain.com/newpage [R=301,L]
RewriteRule ^newpage$ http://newdomain.com/oldpage [R=301,L] # 这会导致循环

RewriteEngine On
RewriteRule ^oldpage$ http://newdomain.com/newpage [R=301,L]

# 错误的配置示例
server {
    listen 80;
    server_name olddomain.com;
    location /oldpage {
        return 301 http://newdomain.com/nonexistentpage; # 目标页面不存在
    }
}

server {
    listen 80;
    server_name olddomain.com;
    location /oldpage {
        return 301 http://newdomain.com/newpage; # 确保目标页面存在
    }
}

# 不优化的配置示例
RewriteEngine On
RewriteRule ^oldpage1$ http://newdomain.com/newpage1 [R=301,L]
RewriteRule ^oldpage2$ http://newdomain.com/newpage2 [R=301,L]
RewriteRule ^oldpage3$ http://newdomain.com/newpage3 [R=301,L]

RewriteEngine On
RewriteCond %{REQUEST_URI} ^/(oldpage[1-3])$
RewriteRule ^ /newdomain.com/%1 [R=301,L]