HTTP: added basic URI rewrite.

This commit introduced the basic URI rewrite. It allows users to change request URI. Note the "rewrite" option ignores the contained query if any and the query from the request is preserverd.
An example:
"routes": [
    {
        "match": {
            "uri": "/v1/test"
        },
        "action": {
            "return": 200
        }
    },
    {
        "action": {
            "rewrite": "/v1$uri",
            "pass": "routes"
        }
    }
]

Reviewed-by: Alejandro Colomar <alx@nginx.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/nxt_tstr.c b/src/nxt_tstr.c
index fda585b8..c439696e 100644
--- a/src/nxt_tstr.c
+++ b/src/nxt_tstr.c
@@ -296,6 +296,13 @@ nxt_tstr_query(nxt_task_t *task, nxt_tstr_query_t *query, nxt_tstr_t *tstr,
 }
 
 
+nxt_bool_t
+nxt_tstr_query_failed(nxt_tstr_query_t *query)
+{
+    return query->failed;
+}
+
+
 void
 nxt_tstr_query_resolve(nxt_task_t *task, nxt_tstr_query_t *query, void *data,
     nxt_work_handler_t ready, nxt_work_handler_t error)