reverse-proxy: allow proxying rfc8441 ws CONNECT

Take the opportunity to provide public method index constants

include/libwebsockets/lws-http.h

@@ -620,6 +620,18 @@ lws_add_http_common_headers(struct lws *wsi, unsigned int code,
 			    const char *content_type, lws_filepos_t content_len,
 			    unsigned char **p, unsigned char *end);
 
+enum {
+	LWSHUMETH_GET,
+	LWSHUMETH_POST,
+	LWSHUMETH_OPTIONS,
+	LWSHUMETH_PUT,
+	LWSHUMETH_PATCH,
+	LWSHUMETH_DELETE,
+	LWSHUMETH_CONNECT,
+	LWSHUMETH_HEAD,
+	LWSHUMETH_COLON_PATH,
+};
+
 /**
  * lws_http_get_uri_and_method() - Get information on method and url
  *
@@ -627,17 +639,7 @@ lws_add_http_common_headers(struct lws *wsi, unsigned int code,
  * \param puri_ptr: points to pointer to set to url
  * \param puri_len: points to int to set to uri length
  *
- * Returns -1 or method index
- *
- * GET      0
- * POST     1
- * OPTIONS  2
- * PUT      3
- * PATCH    4
- * DELETE   5
- * CONNECT  6
- * HEAD     7
- * :path    8
+ * Returns -1 or method index as one of the LWSHUMETH_ constants
  *
  * If returns method, *puri_ptr is set to the method's URI string and *puri_len
  * to its length

lib/roles/ws/server-ws.c

@@ -465,7 +465,9 @@ lws_process_ws_upgrade(struct lws *wsi)
 		meth = lws_http_get_uri_and_method(wsi, &uri_ptr, &uri_len);
 		hit = lws_find_mount(wsi, uri_ptr, uri_len);
 
-		if (hit && (meth == 0 || meth == 8) &&
+		if (hit && (meth == LWSHUMETH_GET ||
+			    meth == LWSHUMETH_CONNECT ||
+			    meth == LWSHUMETH_COLON_PATH) &&
 		    (hit->origin_protocol == LWSMPRO_HTTPS ||
 		     hit->origin_protocol == LWSMPRO_HTTP))
 			/*