support local_infile_dir option

doc/user_guide.rst

@@ -396,6 +396,17 @@ connect(parameters...)
         server_public_key_path
             specifies path to a RSA public key used by caching sha2 password authentication.
             See https://dev.mysql.com/doc/refman/9.0/en/caching-sha2-pluggable-authentication.html
+
+        local_infile
+            sets ``MYSQL_OPT_LOCAL_INFILE`` in ``mysql_options()`` enabling LOAD LOCAL INFILE from any path; zero disables;
+
+            *This must be a keyword parameter.*
+
+        local_infile_dir
+            sets ``MYSQL_OPT_LOAD_DATA_LOCAL_DIR`` in ``mysql_options()`` enabling LOAD LOCAL INFILE from any path; 
+            if ``local_infile`` is set to ``True`` then this is ignored;
+
+            *This must be a keyword parameter.*
 
 .. _mysql_ssl_set: http://dev.mysql.com/doc/refman/en/mysql-ssl-set.html
 

src/MySQLdb/_mysql.c

@@ -48,6 +48,10 @@ PERFORMANCE OF THIS SOFTWARE.
 #define HAVE_MYSQL_SERVER_PUBLIC_KEY
 #endif
 
+#if !defined(MARIADB_VERSION_ID) && MYSQL_VERSION_ID >= 80021
+#define HAVE_MYSQL_OPT_LOCAL_INFILE_DIR
+#endif
+
 #define PY_SSIZE_T_CLEAN 1
 #include "Python.h"
 
@@ -436,7 +440,7 @@ _mysql_ConnectionObject_Initialize(
                   "client_flag", "ssl", "ssl_mode",
                   "local_infile",
                   "read_timeout", "write_timeout", "charset",
-                  "auth_plugin", "server_public_key_path",
+                  "auth_plugin", "server_public_key_path", "local_infile_dir",
                   NULL } ;
     int connect_timeout = 0;
     int read_timeout = 0;
@@ -448,14 +452,15 @@ _mysql_ConnectionObject_Initialize(
          *read_default_group=NULL,
          *charset=NULL,
          *auth_plugin=NULL,
-         *server_public_key_path=NULL;
+         *server_public_key_path=NULL,
+         *local_infile_dir=NULL;
 
     self->converter = NULL;
     self->open = false;
     self->reconnect = false;
 
     if (!PyArg_ParseTupleAndKeywords(args, kwargs,
-                "|ssssisOiiisssiOsiiisss:connect",
+                "|ssssisOiiisssiOsiiissss:connect",
                 kwlist,
                 &host, &user, &passwd, &db,
                 &port, &unix_socket, &conv,
@@ -469,7 +474,8 @@ _mysql_ConnectionObject_Initialize(
                 &write_timeout,
                 &charset,
                 &auth_plugin,
-                &server_public_key_path
+                &server_public_key_path,
+                &local_infile_dir
     ))
         return -1;
 
@@ -479,6 +485,13 @@ _mysql_ConnectionObject_Initialize(
         return -1;
     }
 #endif
+
+#ifndef HAVE_MYSQL_OPT_LOCAL_INFILE_DIR
+    if (local_infile_dir) {
+        PyErr_SetString(_mysql_NotSupportedError, "local_infile_dir is not supported");
+        return -1;
+    }
+#endif
     // For compatibility with PyPy, we need to keep strong reference
     // to unicode objects until we use UTF8.
 #define _stringsuck(d,t,s) {t=PyMapping_GetItemString(s,#d);\
@@ -599,6 +612,12 @@ _mysql_ConnectionObject_Initialize(
     }
 #endif
 
+#ifdef HAVE_MYSQL_OPT_LOCAL_INFILE_DIR
+    if (local_infile_dir) {
+        mysql_options(&(self->connection), MYSQL_OPT_LOAD_DATA_LOCAL_DIR, local_infile_dir);
+    }
+#endif
+
     Py_BEGIN_ALLOW_THREADS
     conn = mysql_real_connect(&(self->connection), host, user, passwd, db,
                   port, unix_socket, client_flag);

src/MySQLdb/connections.py

@@ -142,7 +142,13 @@ class object, used to create cursors (keyword only)
             See https://dev.mysql.com/doc/refman/9.0/en/caching-sha2-pluggable-authentication.html
 
         :param bool local_infile:
-            enables LOAD LOCAL INFILE; zero disables
+            sets ``MYSQL_OPT_LOCAL_INFILE`` in ``mysql_options()`` enabling LOAD LOCAL INFILE from any path; zero disables;
+
+        :param str local_infile_dir:
+            sets ``MYSQL_OPT_LOAD_DATA_LOCAL_DIR`` in ``mysql_options()`` enabling LOAD LOCAL INFILE from any path; 
+            if ``local_infile`` is set to ``True`` then this is ignored;
+
+            supported for mysql version >= 8.0.21
 
         :param bool autocommit:
             If False (default), autocommit is disabled.