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[mod_accesslog] process backslash-escapes in fmt 

Process basic backslash-escapes in format string from lighttpd.conf
Supported sequences: \a \b \f \n \r \t \v
Other backslash-sequences are replaces with the char following backslash

(Apache mod_log_config supports \n and \t as special-cases)
This commit is contained in:
Glenn Strauss 2020-03-14 02:00:00 -04:00
parent f70912ee44
commit f7bac374ee
1 changed files with 23 additions and 0 deletions
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23
src/mod_accesslog.c
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@ -562,6 +562,29 @@ SETDEFAULTS_FUNC(mod_accesslog_set_defaults) {
cpv->v.v = x;
break;
case 1: /* accesslog.format */
if (NULL != strchr(cpv->v.b->ptr, '\\')) {
/* process basic backslash-escapes in format string */
buffer *b;
*(const buffer **)&b = cpv->v.b;
char *t = b->ptr;
for (char *s = t; *s; ++s) {
if (s[0] != '\\') { *t++ = *s; continue; }
if (s[1] == '\0') continue; /*(ignore dangling '\\')*/
switch (*++s) {
case 'a': *t++ = '\a'; break; /* bell */
case 'b': *t++ = '\b'; break; /* backspace */
case 'f': *t++ = '\f'; break; /* form feed */
case 'n': *t++ = '\n'; break; /* newline */
case 'r': *t++ = '\r'; break; /* carriage return */
case 't': *t++ = '\t'; break; /* horizontal tab */
case 'v': *t++ = '\v'; break; /* vertical tab */
/*case '"':*/
/*case '\\':*/
default: *t++ = *s; break; /*(use literal char)*/
}
}
buffer_string_set_length(b, (size_t)(t - b->ptr));
}
cpv->v.v =
mod_accesslog_process_format(CONST_BUF_LEN(cpv->v.b), srv);
if (NULL == cpv->v.v) return HANDLER_ERROR;