Improved $cookie_ evaluation.

In case "Cookie" header is sent by client, multiple cookie pairs were
incorrectly split by a semicolon and comma.

Now they are split by a semicolon only.

For example, next variables will be found for "Cookie: a=b, c=d; e=f":
- $cookie_a: "b, c=d"
- $cookie_e: "f"

Closes #1042 on GitHub.

src/http/modules/ngx_http_userid_filter_module.c

@@ -338,8 +338,8 @@ ngx_http_userid_get_uid(ngx_http_request_t *r, ngx_http_userid_conf_t *conf)
         ngx_http_set_ctx(r, ctx, ngx_http_userid_filter_module);
     }
 
-    cookie = ngx_http_parse_multi_header_lines(r, r->headers_in.cookie,
-                                               &conf->name, &ctx->cookie);
+    cookie = ngx_http_parse_cookie_lines(r, r->headers_in.cookie, &conf->name,
+                                         &ctx->cookie);
     if (cookie == NULL) {
         return ctx;
     }

src/http/ngx_http.h

@@ -110,6 +110,8 @@ ngx_int_t ngx_http_parse_header_line(ngx_http_request_t *r, ngx_buf_t *b,
     ngx_uint_t allow_underscores);
 ngx_table_elt_t *ngx_http_parse_multi_header_lines(ngx_http_request_t *r,
     ngx_table_elt_t *headers, ngx_str_t *name, ngx_str_t *value);
+ngx_table_elt_t *ngx_http_parse_cookie_lines(ngx_http_request_t *r,
+    ngx_table_elt_t *headers, ngx_str_t *name, ngx_str_t *value);
 ngx_table_elt_t *ngx_http_parse_set_cookie_lines(ngx_http_request_t *r,
     ngx_table_elt_t *headers, ngx_str_t *name, ngx_str_t *value);
 ngx_int_t ngx_http_arg(ngx_http_request_t *r, u_char *name, size_t len,

src/http/ngx_http_parse.c

@@ -10,6 +10,10 @@
 #include <ngx_http.h>
 
 
+static ngx_table_elt_t *ngx_http_parse_multi_header_lines_internal(
+    ngx_http_request_t *r, ngx_table_elt_t *headers, ngx_str_t *name,
+    ngx_str_t *value, u_char sep);
+
 static uint32_t  usual[] = {
     0x00000000, /* 0000 0000 0000 0000  0000 0000 0000 0000 */
 
@@ -1997,6 +2001,24 @@ unsafe:
 ngx_table_elt_t *
 ngx_http_parse_multi_header_lines(ngx_http_request_t *r,
     ngx_table_elt_t *headers, ngx_str_t *name, ngx_str_t *value)
+{
+    return ngx_http_parse_multi_header_lines_internal(r, headers, name, value,
+                                                      ',');
+}
+
+
+ngx_table_elt_t *
+ngx_http_parse_cookie_lines(ngx_http_request_t *r,
+    ngx_table_elt_t *headers, ngx_str_t *name, ngx_str_t *value)
+{
+    return ngx_http_parse_multi_header_lines_internal(r, headers, name, value,
+                                                      ';');
+}
+
+
+static ngx_table_elt_t *
+ngx_http_parse_multi_header_lines_internal(ngx_http_request_t *r,
+    ngx_table_elt_t *headers, ngx_str_t *name, ngx_str_t *value, u_char sep)
 {
     u_char           *start, *last, *end, ch;
     ngx_table_elt_t  *h;
@@ -2024,7 +2046,7 @@ ngx_http_parse_multi_header_lines(ngx_http_request_t *r,
             }
 
             if (value == NULL) {
-                if (start == end || *start == ',') {
+                if (start == end || *start == sep) {
                     return h;
                 }
 
@@ -2038,7 +2060,7 @@ ngx_http_parse_multi_header_lines(ngx_http_request_t *r,
 
             while (start < end && *start == ' ') { start++; }
 
-            for (last = start; last < end && *last != ';'; last++) {
+            for (last = start; last < end && *last != sep; last++) {
                 /* void */
             }
 
@@ -2051,7 +2073,7 @@ ngx_http_parse_multi_header_lines(ngx_http_request_t *r,
 
             while (start < end) {
                 ch = *start++;
-                if (ch == ';' || ch == ',') {
+                if (ch == sep) {
                     break;
                 }
             }

src/http/ngx_http_variables.c

@@ -1088,7 +1088,7 @@ ngx_http_variable_cookie(ngx_http_request_t *r, ngx_http_variable_value_t *v,
     s.len = name->len - (sizeof("cookie_") - 1);
     s.data = name->data + sizeof("cookie_") - 1;
 
-    if (ngx_http_parse_multi_header_lines(r, r->headers_in.cookie, &s, &cookie)
+    if (ngx_http_parse_cookie_lines(r, r->headers_in.cookie, &s, &cookie)
         == NULL)
     {
         v->not_found = 1;