对于Apache上的RewriteCond
,这是AND,OR的用法吗?
rewritecond A [or]
rewritecond B
rewritecond C [or]
rewritecond D
RewriteRule ... something
变成了if ( (A or B) and (C or D) ) rewrite_it
。
所以看起来"OR“比"AND”具有更高的优先级?有没有一种方法可以很容易地辨别出来,就像(A or B) and (C or D)
语法一样?
发布于 2015-07-23 03:11:47
这是一个有趣的问题,由于文档中没有非常明确地解释它,我将通过sourcecode of mod_rewrite;来回答这个问题,演示开源的巨大好处。
在顶部部分,您将很快找到defines used to name these flags
#define CONDFLAG_NONE 1<<0
#define CONDFLAG_NOCASE 1<<1
#define CONDFLAG_NOTMATCH 1<<2
#define CONDFLAG_ORNEXT 1<<3
#define CONDFLAG_NOVARY 1<<4
搜索CONDFLAG_ORNEXT确认使用的是based on the existence of the [OR] flag
else if ( strcasecmp(key, "ornext") == 0
|| strcasecmp(key, "OR") == 0 ) {
cfg->flags |= CONDFLAG_ORNEXT;
}
该标志的下一个出现是actual implementation,您将在其中找到遍历RewriteRule的所有RewriteConditions的循环,它主要做的是(剥离,为清楚起见添加注释):
# loop through all Conditions that precede this Rule
for (i = 0; i < rewriteconds->nelts; ++i) {
rewritecond_entry *c = &conds[i];
# execute the current Condition, see if it matches
rc = apply_rewrite_cond(c, ctx);
# does this Condition have an 'OR' flag?
if (c->flags & CONDFLAG_ORNEXT) {
if (!rc) {
/* One condition is false, but another can be still true. */
continue;
}
else {
/* skip the rest of the chained OR conditions */
while ( i < rewriteconds->nelts
&& c->flags & CONDFLAG_ORNEXT) {
c = &conds[++i];
}
}
}
else if (!rc) {
return 0;
}
}
您应该能够解释这一点;这意味着OR具有更高的优先级,并且您的示例确实导致了if ( (A OR B) AND (C OR D) )
。例如,如果你有以下条件:
RewriteCond A [or]
RewriteCond B [or]
RewriteCond C
RewriteCond D
它将被解释为if ( (A OR B OR C) and D )
。
发布于 2019-10-14 00:19:13
经过许多努力,为了实现一个通用的、灵活的、可读性更好的解决方案,在我的例子中,我最终将OR的结果保存到ENV变量中,并对这些变量执行和。
# RESULT_ONE = A OR B
RewriteRule ^ - [E=RESULT_ONE:False]
RewriteCond ...A... [OR]
RewriteCond ...B...
RewriteRule ^ - [E=RESULT_ONE:True]
# RESULT_TWO = C OR D
RewriteRule ^ - [E=RESULT_TWO:False]
RewriteCond ...C... [OR]
RewriteCond ...D...
RewriteRule ^ - [E=RESULT_TWO:True]
# if ( RESULT_ONE AND RESULT_TWO ) then ( RewriteRule ...something... )
RewriteCond %{ENV:RESULT_ONE} =True
RewriteCond %{ENV:RESULT_TWO} =True
RewriteRule ...something...
需求
支持
https://stackoverflow.com/questions/922399
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