htaccess 永久重定向抛出内部服务器错误
htaccess permanent redirect throws Internal Server Error
在 Apache 2.2 的 mod_rewrite documentation 中，RewriteRule [R] 标志声明：
Any valid HTTP response status code may be specified, using the syntax [R=305], with a 302 status code being used by default if none is specified. The status code specified need not necessarily be a redirect (3xx) status code. However, if a status code is outside the redirect range (300-399) then the substitution string is dropped entirely, and rewriting is stopped as if the L were used.
In addition to response status codes, you may also specify redirect status using their symbolic names: temp (default), permanent, or seeother.
但是下面的代码片段似乎只允许“符号名称”：
# Force HTTPS
RewriteCond %{HTTP:X-Forwarded-Proto} !https
RewriteCond %{HTTPS} off
# this works
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=permanent,NE]
# this doesn't work
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=308,NE]
错误日志显示：
[Tue May 23 23:11:12 2017] [alert] [client 192.168.33.1] /var/www/html/ventus/.htaccess: RewriteRule: invalid HTTP response code '308' for flag 'R'
但是，308 似乎是永久重定向的 HTTP 状态代码：https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/308
这是 Apache 中的错误还是我做错了什么？
您的 apache (2.2) 版本不能使用 308。在 apache 2.4.3 中添加了对 308 状态的支持：https://archive.apache.org/dist/httpd/CHANGES_2.4.3
core: Add missing HTTP status codes registered with IANA.
是的，这是一个错误。您对文档的解释是正确的，应该接受 300-399 范围内的所有代码。
在 Apache 2.2 的 mod_rewrite documentation 中，RewriteRule [R] 标志声明：
Any valid HTTP response status code may be specified, using the syntax [R=305], with a 302 status code being used by default if none is specified. The status code specified need not necessarily be a redirect (3xx) status code. However, if a status code is outside the redirect range (300-399) then the substitution string is dropped entirely, and rewriting is stopped as if the L were used.
In addition to response status codes, you may also specify redirect status using their symbolic names:
temp(default),permanent, orseeother.
但是下面的代码片段似乎只允许“符号名称”：
# Force HTTPS
RewriteCond %{HTTP:X-Forwarded-Proto} !https
RewriteCond %{HTTPS} off
# this works
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=permanent,NE]
# this doesn't work
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=308,NE]
错误日志显示：
[Tue May 23 23:11:12 2017] [alert] [client 192.168.33.1] /var/www/html/ventus/.htaccess: RewriteRule: invalid HTTP response code '308' for flag 'R'
但是，308 似乎是永久重定向的 HTTP 状态代码：https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/308
这是 Apache 中的错误还是我做错了什么？
您的 apache (2.2) 版本不能使用 308。在 apache 2.4.3 中添加了对 308 状态的支持：https://archive.apache.org/dist/httpd/CHANGES_2.4.3
core: Add missing HTTP status codes registered with IANA.
是的，这是一个错误。您对文档的解释是正确的，应该接受 300-399 范围内的所有代码。