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Cache: normalization of some Vary headers.

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Spaces in Accept-Charset, Accept-Encoding, and Accept-Language headers
are now ignored.  As per syntax of these headers spaces can only appear
in places where they are optional.
This commit is contained in:
Maxim Dounin 2014-10-27 21:14:12 +03:00
parent 6255935e0f
commit 5f625b7df0
1 changed files with 66 additions and 2 deletions
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68
src/http/ngx_http_file_cache.c
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@ -951,10 +951,34 @@ static void
ngx_http_file_cache_vary_header(ngx_http_request_t *r, ngx_md5_t *md5,
ngx_str_t *name)
{
ngx_uint_t i;
size_t len;
u_char *p, *start, *last;
ngx_uint_t i, multiple, normalize;
ngx_list_part_t *part;
ngx_table_elt_t *header;
multiple = 0;
normalize = 0;
if (name->len == sizeof("Accept-Charset") - 1
&& ngx_strncasecmp(name->data, (u_char *) "Accept-Charset",
sizeof("Accept-Charset") - 1) == 0)
{
normalize = 1;
} else if (name->len == sizeof("Accept-Encoding") - 1
&& ngx_strncasecmp(name->data, (u_char *) "Accept-Encoding",
sizeof("Accept-Encoding") - 1) == 0)
{
normalize = 1;
} else if (name->len == sizeof("Accept-Language") - 1
&& ngx_strncasecmp(name->data, (u_char *) "Accept-Language",
sizeof("Accept-Language") - 1) == 0)
{
normalize = 1;
}
part = &r->headers_in.headers.part;
header = part->elts;
@ -982,7 +1006,47 @@ ngx_http_file_cache_vary_header(ngx_http_request_t *r, ngx_md5_t *md5,
continue;
}
ngx_md5_update(md5, header[i].value.data, header[i].value.len);
if (!normalize) {
if (multiple) {
ngx_md5_update(md5, (u_char *) ",", sizeof(",") - 1);
}
ngx_md5_update(md5, header[i].value.data, header[i].value.len);
multiple = 1;
continue;
}
/* normalize spaces */
p = header[i].value.data;
start = p;
last = p + header[i].value.len;
while (p < last) {
while (p < last && (*p == ' ' || *p == ',')) { p++; }
start = p;
while (p < last && *p != ',' && *p != ' ') { p++; }
len = p - start;
if (len == 0) {
break;
}
if (multiple) {
ngx_md5_update(md5, (u_char *) ",", sizeof(",") - 1);
}
ngx_md5_update(md5, start, len);
multiple = 1;
}
}
}