From 7257e61e3de05906ae0c6db691de5e7ba77f5f8a Mon Sep 17 00:00:00 2001
From: Marko Lindqvist <cazfi74@gmail.com>
Date: Sun, 3 Jul 2022 09:29:39 +0300
Subject: [PATCH 55/55] Free curl handle

See osdn #44945

Signed-off-by: Marko Lindqvist <cazfi74@gmail.com>
---
 common/fc_interface.c |  2 ++
 utility/netfile.c     | 31 ++++++++++++++++++++++---------
 utility/netfile.h     |  7 ++++++-
 3 files changed, 30 insertions(+), 10 deletions(-)

diff --git a/common/fc_interface.c b/common/fc_interface.c
index b7e63a2630..b1741a7ec4 100644
--- a/common/fc_interface.c
+++ b/common/fc_interface.c
@@ -16,6 +16,7 @@
 #endif
 
 /* utility */
+#include "netfile.h"
 #include "shared.h"
 
 /* common */
@@ -84,5 +85,6 @@ void free_libfreeciv(void)
   free_freeciv_storage_dir();
   free_user_home_dir();
   free_fileinfo_data();
+  netfile_free();
   fc_strAPI_free();
 }
diff --git a/utility/netfile.c b/utility/netfile.c
index 99ae16ffb7..b8dce3c2b7 100644
--- a/utility/netfile.c
+++ b/utility/netfile.c
@@ -41,28 +41,28 @@ typedef size_t (*netfile_write_cb)(char *ptr, size_t size, size_t nmemb, void *u
 
 static char error_buf_curl[CURL_ERROR_SIZE];
 
+/* Consecutive transfers can use same handle for better performance */
+static CURL *chandle = NULL;
+
 /*******************************************************************//**
   Set handle to usable state.
 ***********************************************************************/
 static CURL *netfile_init_handle(void)
 {
-  /* Consecutive transfers can use same handle for better performance */
-  static CURL *handle = NULL;
-
-  if (handle == NULL) {
-    handle = curl_easy_init();
+  if (chandle == NULL) {
+    chandle = curl_easy_init();
   } else {
-    curl_easy_reset(handle);
+    curl_easy_reset(chandle);
   }
 
   error_buf_curl[0] = '\0';
-  curl_easy_setopt(handle, CURLOPT_ERRORBUFFER, error_buf_curl);
+  curl_easy_setopt(chandle, CURLOPT_ERRORBUFFER, error_buf_curl);
 
 #ifdef CUSTOM_CACERT_PATH
-  curl_easy_setopt(handle, CURLOPT_CAINFO, CUSTOM_CACERT_PATH);
+  curl_easy_setopt(chandle, CURLOPT_CAINFO, CUSTOM_CACERT_PATH);
 #endif /* CUSTOM_CERT_PATH */
 
-  return handle;
+  return chandle;
 }
 
 /*******************************************************************//**
@@ -284,3 +284,16 @@ bool netfile_send_post(const char *URL, struct netfile_post *post,
 }
 
 #endif /* __EMSCRIPTEN__ */
+
+/*******************************************************************//**
+  Free resources reserved by the netfile system
+***********************************************************************/
+void netfile_free(void)
+{
+#ifndef __EMSCRIPTEN__
+  if (chandle != NULL) {
+    curl_easy_cleanup(chandle);
+    chandle = NULL;
+  }
+#endif /* __EMSCRIPTEN__ */
+}
diff --git a/utility/netfile.h b/utility/netfile.h
index b3782a143b..a3c4b7bc7d 100644
--- a/utility/netfile.h
+++ b/utility/netfile.h
@@ -1,4 +1,4 @@
-/********************************************************************** 
+/***********************************************************************
  Freeciv - Copyright (C) 1996 - A Kjeldberg, L Gregersen, P Unold
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -18,6 +18,9 @@
 extern "C" {
 #endif /* __cplusplus */
 
+/* utility */
+#include "support.h" /* bool */
+
 struct netfile_post;
 
 struct netfile_write_cb_data
@@ -45,6 +48,8 @@ bool netfile_send_post(const char *URL, struct netfile_post *post,
                        FILE *reply_fp, struct netfile_write_cb_data *mem_data,
                        const char *addr);
 
+void netfile_free(void);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */
-- 
2.35.1