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Cache: normalization of some Vary headers.
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.
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@ -951,10 +951,34 @@ static void
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ngx_http_file_cache_vary_header(ngx_http_request_t *r, ngx_md5_t *md5,
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ngx_http_file_cache_vary_header(ngx_http_request_t *r, ngx_md5_t *md5,
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ngx_str_t *name)
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ngx_str_t *name)
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{
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{
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ngx_uint_t i;
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size_t len;
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u_char *p, *start, *last;
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ngx_uint_t i, multiple, normalize;
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ngx_list_part_t *part;
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ngx_list_part_t *part;
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ngx_table_elt_t *header;
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ngx_table_elt_t *header;
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multiple = 0;
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normalize = 0;
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if (name->len == sizeof("Accept-Charset") - 1
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&& ngx_strncasecmp(name->data, (u_char *) "Accept-Charset",
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sizeof("Accept-Charset") - 1) == 0)
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{
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normalize = 1;
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} else if (name->len == sizeof("Accept-Encoding") - 1
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&& ngx_strncasecmp(name->data, (u_char *) "Accept-Encoding",
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sizeof("Accept-Encoding") - 1) == 0)
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{
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normalize = 1;
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} else if (name->len == sizeof("Accept-Language") - 1
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&& ngx_strncasecmp(name->data, (u_char *) "Accept-Language",
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sizeof("Accept-Language") - 1) == 0)
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{
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normalize = 1;
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}
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part = &r->headers_in.headers.part;
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part = &r->headers_in.headers.part;
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header = part->elts;
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header = part->elts;
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@ -982,7 +1006,47 @@ ngx_http_file_cache_vary_header(ngx_http_request_t *r, ngx_md5_t *md5,
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continue;
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continue;
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}
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}
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if (!normalize) {
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if (multiple) {
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ngx_md5_update(md5, (u_char *) ",", sizeof(",") - 1);
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}
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ngx_md5_update(md5, header[i].value.data, header[i].value.len);
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ngx_md5_update(md5, header[i].value.data, header[i].value.len);
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multiple = 1;
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continue;
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}
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/* normalize spaces */
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p = header[i].value.data;
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start = p;
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last = p + header[i].value.len;
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while (p < last) {
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while (p < last && (*p == ' ' || *p == ',')) { p++; }
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start = p;
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while (p < last && *p != ',' && *p != ' ') { p++; }
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len = p - start;
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if (len == 0) {
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break;
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}
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if (multiple) {
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ngx_md5_update(md5, (u_char *) ",", sizeof(",") - 1);
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}
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ngx_md5_update(md5, start, len);
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multiple = 1;
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}
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}
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}
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}
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}
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