fix code style and len error

patches/nginx-1.17.8-set_uri_security_issue.patch

@@ -1,5 +1,5 @@
 diff --git a/src/http/modules/ngx_http_static_module.c b/src/http/modules/ngx_http_static_module.c
-index 282d6ee9..e889540d 100644
+index 282d6ee..899e11e 100644
 --- a/src/http/modules/ngx_http_static_module.c
 +++ b/src/http/modules/ngx_http_static_module.c
 @@ -58,6 +58,8 @@ ngx_http_static_handler(ngx_http_request_t *r)
@@ -11,20 +11,21 @@ index 282d6ee9..e889540d 100644
  
      if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD|NGX_HTTP_POST))) {
          return NGX_HTTP_NOT_ALLOWED;
-@@ -162,9 +164,20 @@ ngx_http_static_handler(ngx_http_request_t *r)
+@@ -162,9 +164,21 @@ ngx_http_static_handler(ngx_http_request_t *r)
  
              *last = '/';
  
 +            escape = 2 * ngx_escape_uri(NULL, location, len, NGX_ESCAPE_URI);
 +            if (escape > 0) {
-+                uri = ngx_pnalloc(r->pool, len + 2 * escape);
++                uri = ngx_pnalloc(r->pool, len + escape);
 +                if (uri == NULL) {
 +                   return NGX_ERROR;
 +                }
 +                ngx_escape_uri(uri, location, len, NGX_ESCAPE_URI);
 +                location = uri;
-+                len += 2 * escape;
++                len += escape;
 +            }
++
          } else {
 +            escape = 2 * ngx_escape_uri(NULL, r->uri.data, r->uri.len, NGX_ESCAPE_URI);
              if (r->args.len) {
@@ -33,13 +34,14 @@ index 282d6ee9..e889540d 100644
              }
  
              location = ngx_pnalloc(r->pool, len);
-@@ -173,7 +186,11 @@ ngx_http_static_handler(ngx_http_request_t *r)
+@@ -173,7 +187,12 @@ ngx_http_static_handler(ngx_http_request_t *r)
                  return NGX_HTTP_INTERNAL_SERVER_ERROR;
              }
  
 -            last = ngx_copy(location, r->uri.data, r->uri.len);
 +            if (escape > 0) {
-+                last = (u_char *)ngx_escape_uri(location, r->uri.data, r->uri.len, NGX_ESCAPE_URI);
++                last = (u_char *) ngx_escape_uri(location, r->uri.data, r->uri.len, NGX_ESCAPE_URI);
++
 +            } else {
 +                last = ngx_copy(location, r->uri.data, r->uri.len);
 +            }