奇怪的 apache 重寫正則表達式

我正在將設置從 apache 遷移到 nginx。在這個過程中，我在 .htaccess 文件中遇到了這個重寫規則：

RewriteRule ^/?(?:(?!one|two|three|four).?)+/?$ http://somewhere.else.com [R=301,L]

我通常很擅長正則表達式，但這超出了我的範圍。首先，我什至不知道嵌入括號是允許的。有人可以向我解釋這個正則表達式嗎？如果它只是 apache，我如何在 nginx 中複製它？

1. (?!one|two|three|four)意思是“不是（一或二或三或四）”。
2. 表示非擷取組（因此?:您不能使用$N, 例如引用它$1）。
3. 總之，它幾乎意味著任何沒有“一”或“二”或“三”或“四”序列的文本。

例如：

此 URL/categories/category-1/hello-kitten/如果應用於上述規則，將被重定向。但是這個/categoneries/category-1/hello-kitten/不會，因為它有序列一：/categoneries/category-1/hello-kitten/

如果有幫助，這裡有一些更具體和詳細的資訊：

' ^/?(?:(?!one|two|three|four).?)+/?$ http://somewhere.else.com [R=301,L]
' 
' Options: case insensitive
' 
' Assert position at the beginning of the string «^»
' Match the character “/” literally «/?»
'    Between zero and one times, as many times as possible, giving back as needed (greedy) «?»
' Match the regular expression below «(?:(?!one|two|three|four).?)+»
'    Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
'    Assert that it is impossible to match the regex below starting at this position (negative lookahead) «(?!one|two|three|four)»
'       Match either the regular expression below (attempting the next alternative only if this one fails) «one»
'          Match the characters “one” literally «one»
'       Or match regular expression number 2 below (attempting the next alternative only if this one fails) «two»
'          Match the characters “two” literally «two»
'       Or match regular expression number 3 below (attempting the next alternative only if this one fails) «three»
'          Match the characters “three” literally «three»
'       Or match regular expression number 4 below (the entire group fails if this one fails to match) «four»
'          Match the characters “four” literally «four»
'    Match any single character that is not a line break character «.?»
'       Between zero and one times, as many times as possible, giving back as needed (greedy) «?»
' Match the character “/” literally «/?»
'    Between zero and one times, as many times as possible, giving back as needed (greedy) «?»
' Assert position at the end of the string (or before the line break at the end of the string, if any) «$»
' Match the characters “ http://somewhere” literally « http://somewhere»
' Match any single character that is not a line break character «.»
' Match the characters “else” literally «else»
' Match any single character that is not a line break character «.»
' Match the characters “com ” literally «com »
' Match a single character present in the list “R=301,L” «[R=301,L]»

引用自：https://serverfault.com/questions/298180