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Added a "fallback" option to be used with the "share" action.

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It allows proceeding to another action if a file isn't available.

An example:

    {
        "share": "/data/www/",

        "fallback": {
            "pass": "applications/php"
        }
    }

In the example above, an attempt is made first to serve a request with
a file from the "/data/www/" directory.  If there's no such file, the
request is passed to the "php" application.

Fallback actions may be nested:

    {
        "share": "/data/www/",

        "fallback": {
            "share": "/data/cache/",

            "fallback": {
                "proxy": "http://127.0.0.1:9000"
            }
        }
    }
This commit is contained in:
Valentin Bartenev
2020-03-03 20:37:47 +03:00
parent a60f856ce2
commit a98de7f705
4 changed files with 68 additions and 23 deletions
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13
src/nxt_http_static.c
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@@ -49,6 +49,10 @@ nxt_http_static_handler(nxt_task_t *task, nxt_http_request_t *r,
if (nxt_slow_path(!nxt_str_eq(r->method, "GET", 3))) {
if (!nxt_str_eq(r->method, "HEAD", 4)) {
if (action->u.fallback != NULL) {
return action->u.fallback;
}
nxt_http_request_error(task, r, NXT_HTTP_METHOD_NOT_ALLOWED);
return NULL;
}
@@ -123,6 +127,10 @@ nxt_http_static_handler(nxt_task_t *task, nxt_http_request_t *r,
break;
}
if (level == NXT_LOG_ERR && action->u.fallback != NULL) {
return action->u.fallback;
}
if (status != NXT_HTTP_NOT_FOUND) {
nxt_log(task, level, "open(\"%FN\") failed %E", f->name, f->error);
}
@@ -222,8 +230,13 @@ nxt_http_static_handler(nxt_task_t *task, nxt_http_request_t *r,
nxt_file_close(task, f);
if (nxt_slow_path(!nxt_is_dir(&fi))) {
if (action->u.fallback != NULL) {
return action->u.fallback;
}
nxt_log(task, NXT_LOG_ERR, "\"%FN\" is not a regular file",
f->name);
nxt_http_request_error(task, r, NXT_HTTP_NOT_FOUND);
return NULL;
}