un-nest curl

curl-8.15.0/docs/examples/ftp-delete.c

@@ -0,0 +1,84 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * SPDX-License-Identifier: curl
+ *
+ ***************************************************************************/
+#include <stdio.h>
+
+#include <curl/curl.h>
+
+/* <DESC>
+ * Delete a single file from an FTP server.
+ * </DESC>
+ */
+
+static size_t my_fwrite(void *buffer, size_t size, size_t nmemb, void *stream)
+{
+  (void)buffer;
+  (void)stream;
+  return size * nmemb;
+}
+
+
+int main(void)
+{
+  CURL *curl;
+  CURLcode res;
+  struct curl_slist *headerlist = NULL;
+
+  curl_global_init(CURL_GLOBAL_DEFAULT);
+
+  curl = curl_easy_init();
+  if(curl) {
+    /*
+     * You better replace the URL with one that works!
+     */
+    curl_easy_setopt(curl, CURLOPT_URL, "ftp://ftp.example.com/");
+    /* Define our callback to get called when there is data to be written */
+    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, my_fwrite);
+
+    /* Switch on full protocol/debug output */
+    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
+
+    /* build a list of commands to pass to libcurl */
+    headerlist = curl_slist_append(headerlist, "DELE file-to-remove");
+
+    /* pass in list of FTP commands to run after the transfer */
+    curl_easy_setopt(curl, CURLOPT_POSTQUOTE, headerlist);
+
+    res = curl_easy_perform(curl);
+
+    /* always cleanup */
+    curl_easy_cleanup(curl);
+
+    /* clean up the FTP commands list */
+    curl_slist_free_all(headerlist);
+
+    if(CURLE_OK != res) {
+      /* we failed */
+      fprintf(stderr, "curl told us %d\n", res);
+    }
+  }
+
+  curl_global_cleanup();
+
+  return 0;
+}