[Global]: loading init

deps/curl/docs/examples/multi-app.c

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+/***************************************************************************
+ *                                  _   _ ____  _
+ *  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
+ *
+ ***************************************************************************/
+/* <DESC>
+ * A basic application source code using the multi interface doing two
+ * transfers in parallel.
+ * </DESC>
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+/* somewhat unix-specific */
+#include <sys/time.h>
+#include <unistd.h>
+
+/* curl stuff */
+#include <curl/curl.h>
+
+/*
+ * Download an HTTP file and upload an FTP file simultaneously.
+ */
+
+#define HANDLECOUNT 2   /* Number of simultaneous transfers */
+#define HTTP_HANDLE 0   /* Index for the HTTP transfer */
+#define FTP_HANDLE 1    /* Index for the FTP transfer */
+
+int main(void)
+{
+  CURL *handles[HANDLECOUNT];
+  CURLM *multi_handle;
+
+  int still_running = 1; /* keep number of running handles */
+  int i;
+
+  CURLMsg *msg; /* for picking up messages with the transfer status */
+  int msgs_left; /* how many messages are left */
+
+  /* Allocate one CURL handle per transfer */
+  for(i = 0; i<HANDLECOUNT; i++)
+    handles[i] = curl_easy_init();
+
+  /* set the options (I left out a few, you will get the point anyway) */
+  curl_easy_setopt(handles[HTTP_HANDLE], CURLOPT_URL, "https://example.com");
+
+  curl_easy_setopt(handles[FTP_HANDLE], CURLOPT_URL, "ftp://example.com");
+  curl_easy_setopt(handles[FTP_HANDLE], CURLOPT_UPLOAD, 1L);
+
+  /* init a multi stack */
+  multi_handle = curl_multi_init();
+
+  /* add the individual transfers */
+  for(i = 0; i<HANDLECOUNT; i++)
+    curl_multi_add_handle(multi_handle, handles[i]);
+
+  while(still_running) {
+    CURLMcode mc = curl_multi_perform(multi_handle, &still_running);
+
+    if(still_running)
+      /* wait for activity, timeout or "nothing" */
+      mc = curl_multi_poll(multi_handle, NULL, 0, 1000, NULL);
+
+    if(mc)
+      break;
+  }
+  /* See how the transfers went */
+  while((msg = curl_multi_info_read(multi_handle, &msgs_left))) {
+    if(msg->msg == CURLMSG_DONE) {
+      int idx;
+
+      /* Find out which handle this message is about */
+      for(idx = 0; idx<HANDLECOUNT; idx++) {
+        int found = (msg->easy_handle == handles[idx]);
+        if(found)
+          break;
+      }
+
+      switch(idx) {
+      case HTTP_HANDLE:
+        printf("HTTP transfer completed with status %d\n", msg->data.result);
+        break;
+      case FTP_HANDLE:
+        printf("FTP transfer completed with status %d\n", msg->data.result);
+        break;
+      }
+    }
+  }
+
+  /* remove the transfers and cleanup the handles */
+  for(i = 0; i<HANDLECOUNT; i++) {
+    curl_multi_remove_handle(multi_handle, handles[i]);
+    curl_easy_cleanup(handles[i]);
+  }
+
+  curl_multi_cleanup(multi_handle);
+
+  return 0;
+}