Update libcurl

Engine/lib/curl/tests/libtest/lib1540.c

@@ -0,0 +1,121 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2022, 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 "test.h"
+
+#include "testutil.h"
+#include "warnless.h"
+#include "memdebug.h"
+
+struct transfer_status {
+  CURL *easy;
+  int halted;
+  int counter; /* count write callback invokes */
+  int please;  /* number of times xferinfo is called while halted */
+};
+
+static int please_continue(void *userp,
+                           curl_off_t dltotal,
+                           curl_off_t dlnow,
+                           curl_off_t ultotal,
+                           curl_off_t ulnow)
+{
+  struct transfer_status *st = (struct transfer_status *)userp;
+  (void)dltotal;
+  (void)dlnow;
+  (void)ultotal;
+  (void)ulnow;
+  if(st->halted) {
+    st->please++;
+    if(st->please == 2) {
+      /* waited enough, unpause! */
+      curl_easy_pause(st->easy, CURLPAUSE_CONT);
+    }
+  }
+  fprintf(stderr, "xferinfo: paused %d\n", st->halted);
+  return 0; /* go on */
+}
+
+static size_t header_callback(void *ptr, size_t size, size_t nmemb,
+                              void *userp)
+{
+  size_t len = size * nmemb;
+  (void)userp;
+  (void)fwrite(ptr, size, nmemb, stdout);
+  return len;
+}
+
+static size_t write_callback(void *ptr, size_t size, size_t nmemb, void *userp)
+{
+  struct transfer_status *st = (struct transfer_status *)userp;
+  size_t len = size * nmemb;
+  st->counter++;
+  if(st->counter > 1) {
+    /* the first call puts us on pause, so subsequent calls are after
+       unpause */
+    fwrite(ptr, size, nmemb, stdout);
+    return len;
+  }
+  printf("Got %d bytes but pausing!\n", (int)len);
+  st->halted = 1;
+  return CURL_WRITEFUNC_PAUSE;
+}
+
+int test(char *URL)
+{
+  CURL *curls = NULL;
+  int i = 0;
+  int res = 0;
+  struct transfer_status st;
+
+  start_test_timing();
+
+  memset(&st, 0, sizeof(st));
+
+  global_init(CURL_GLOBAL_ALL);
+
+  easy_init(curls);
+  st.easy = curls; /* to allow callbacks access */
+
+  easy_setopt(curls, CURLOPT_URL, URL);
+  easy_setopt(curls, CURLOPT_WRITEFUNCTION, write_callback);
+  easy_setopt(curls, CURLOPT_WRITEDATA, &st);
+  easy_setopt(curls, CURLOPT_HEADERFUNCTION, header_callback);
+  easy_setopt(curls, CURLOPT_HEADERDATA, &st);
+
+  easy_setopt(curls, CURLOPT_XFERINFOFUNCTION, please_continue);
+  easy_setopt(curls, CURLOPT_XFERINFODATA, &st);
+  easy_setopt(curls, CURLOPT_NOPROGRESS, 0L);
+
+  res = curl_easy_perform(curls);
+
+test_cleanup:
+
+  curl_easy_cleanup(curls);
+  curl_global_cleanup();
+
+  if(res)
+    i = res;
+
+  return i; /* return the final return code */
+}