[nginx] Xslt: fixed parameters parsing (ticket #1416).

[Ruslan Ermilov]

details:   http://hg.nginx.org/nginx/rev/595a3de03e91
branches:  
changeset: 7154:595a3de03e91
user:      Ruslan Ermilov <ru at nginx.com>
date:      Thu Nov 16 13:20:47 2017 +0300
description:
Xslt: fixed parameters parsing (ticket #1416).

If parameters were specified in xslt_stylesheet without variables,
any request except the first would cause an internal server error.

diffstat:

 src/http/modules/ngx_http_xslt_filter_module.c |  15 +++++++++++++--
 1 files changed, 13 insertions(+), 2 deletions(-)

diffs (25 lines):

diff -r 32f83fe5747b -r 595a3de03e91 src/http/modules/ngx_http_xslt_filter_module.c
--- a/src/http/modules/ngx_http_xslt_filter_module.c	Fri Oct 27 00:30:38 2017 +0800
+++ b/src/http/modules/ngx_http_xslt_filter_module.c	Thu Nov 16 13:20:47 2017 +0300
@@ -686,8 +686,19 @@ ngx_http_xslt_params(ngx_http_request_t 
          * specified in xslt_stylesheet directives
          */
 
-        p = string.data;
-        last = string.data + string.len;
+        if (param[i].value.lengths) {
+            p = string.data;
+
+        } else {
+            p = ngx_pnalloc(r->pool, string.len + 1);
+            if (p == NULL) {
+                return NGX_ERROR;
+            }
+
+            ngx_memcpy(p, string.data, string.len + 1);
+        }
+
+        last = p + string.len;
 
         while (p && *p) {