From be8e5b45fab1d6a90c660559bba710ada2ae4d0d Mon Sep 17 00:00:00 2001
From: Ian Barwick <ian@2ndquadrant.com>
Date: Tue, 5 May 2020 11:15:33 +0900
Subject: [PATCH] Add utility function validate_conninfo_string()

---
 dbutils.c | 27 ++++++++++++++++++++++++++-
 dbutils.h |  1 +
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/dbutils.c b/dbutils.c
index 5094a87b..61e70b6f 100644
--- a/dbutils.c
+++ b/dbutils.c
@@ -705,10 +705,35 @@ param_get(t_conninfo_param_list *param_list, const char *param)
 }
 
 
+/*
+ * Validate a conninfo string by attempting to parse it.
+ *
+ * "errmsg": passed to PQconninfoParse(), may be NULL
+ *
+ * NOTE: PQconninfoParse() verifies the string format and checks for
+ * valid options but does not sanity check values.
+ */
+
+bool
+validate_conninfo_string(const char *conninfo_str, char **errmsg)
+{
+	PQconninfoOption *connOptions = NULL;
+
+	connOptions = PQconninfoParse(conninfo_str, errmsg);
+
+	if (connOptions == NULL)
+		return false;
+
+	return true;
+}
+
+
 /*
  * Parse a conninfo string into a t_conninfo_param_list
  *
- * See conn_to_param_list() to do the same for a PGconn
+ * See conn_to_param_list() to do the same for a PGconn.
+ *
+ * "errmsg": passed to PQconninfoParse(), may be NULL
  *
  * "ignore_local_params": ignores those parameters specific
  * to a local installation, i.e. when parsing an upstream
diff --git a/dbutils.h b/dbutils.h
index 017b9271..3d48b0f8 100644
--- a/dbutils.h
+++ b/dbutils.h
@@ -413,6 +413,7 @@ void		conn_to_param_list(PGconn *conn, t_conninfo_param_list *param_list);
 void		param_set(t_conninfo_param_list *param_list, const char *param, const char *value);
 void		param_set_ine(t_conninfo_param_list *param_list, const char *param, const char *value);
 char	   *param_get(t_conninfo_param_list *param_list, const char *param);
+bool		validate_conninfo_string(const char *conninfo_str, char **errmsg);
 bool		parse_conninfo_string(const char *conninfo_str, t_conninfo_param_list *param_list, char **errmsg, bool ignore_local_params);
 char	   *param_list_to_string(t_conninfo_param_list *param_list);
 char	   *normalize_conninfo_string(const char *conninfo_str);