tests/http/clients: move to tests/client

To have all the tests binaries directly under the tests directory.

There seems to be no issue adding non-http test clients to this subdir.

Closes #17637

tests/client/h2_serverpush.c

@@ -0,0 +1,196 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  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
+ *
+ ***************************************************************************/
+
+static int my_trace(CURL *handle, curl_infotype type,
+                    char *data, size_t size, void *userp)
+{
+  const char *text;
+  (void)handle; /* prevent compiler warning */
+  (void)userp;
+  switch(type) {
+  case CURLINFO_TEXT:
+    fprintf(stderr, "== Info: %s", data);
+    return 0;
+  case CURLINFO_HEADER_OUT:
+    text = "=> Send header";
+    break;
+  case CURLINFO_DATA_OUT:
+    text = "=> Send data";
+    break;
+  case CURLINFO_SSL_DATA_OUT:
+    text = "=> Send SSL data";
+    break;
+  case CURLINFO_HEADER_IN:
+    text = "<= Recv header";
+    break;
+  case CURLINFO_DATA_IN:
+    text = "<= Recv data";
+    break;
+  case CURLINFO_SSL_DATA_IN:
+    text = "<= Recv SSL data";
+    break;
+  default: /* in case a new one is introduced to shock us */
+    return 0;
+  }
+
+  dump(text, (unsigned char *)data, size, 1);
+  return 0;
+}
+
+static int setup_h2_serverpush(CURL *hnd, const char *url)
+{
+  FILE *out = fopen("download_0.data", "wb");
+  if(!out)
+    /* failed */
+    return 1;
+
+  curl_easy_setopt(hnd, CURLOPT_URL, url);
+  curl_easy_setopt(hnd, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2_0);
+  curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYPEER, 0L);
+  curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYHOST, 0L);
+
+  curl_easy_setopt(hnd, CURLOPT_WRITEDATA, out);
+
+  /* please be verbose */
+  curl_easy_setopt(hnd, CURLOPT_VERBOSE, 1L);
+  curl_easy_setopt(hnd, CURLOPT_DEBUGFUNCTION, my_trace);
+
+  /* wait for pipe connection to confirm */
+  curl_easy_setopt(hnd, CURLOPT_PIPEWAIT, 1L);
+
+  return 0; /* all is good */
+}
+
+/* called when there's an incoming push */
+static int server_push_callback(CURL *parent,
+                                CURL *easy,
+                                size_t num_headers,
+                                struct curl_pushheaders *headers,
+                                void *userp)
+{
+  char *headp;
+  size_t i;
+  int *transfers = (int *)userp;
+  char filename[128];
+  FILE *out;
+  static unsigned int count = 0;
+  int rv;
+
+  (void)parent; /* we have no use for this */
+  curl_msnprintf(filename, sizeof(filename)-1, "push%u", count++);
+
+  /* here's a new stream, save it in a new file for each new push */
+  out = fopen(filename, "wb");
+  if(!out) {
+    /* if we cannot save it, deny it */
+    fprintf(stderr, "Failed to create output file for push\n");
+    rv = CURL_PUSH_DENY;
+    goto out;
+  }
+
+  /* write to this file */
+  curl_easy_setopt(easy, CURLOPT_WRITEDATA, out);
+
+  fprintf(stderr, "**** push callback approves stream %u, got %lu headers!\n",
+          count, (unsigned long)num_headers);
+
+  for(i = 0; i < num_headers; i++) {
+    headp = curl_pushheader_bynum(headers, i);
+    fprintf(stderr, "**** header %lu: %s\n", (unsigned long)i, headp);
+  }
+
+  headp = curl_pushheader_byname(headers, ":path");
+  if(headp) {
+    fprintf(stderr, "**** The PATH is %s\n", headp /* skip :path + colon */);
+  }
+
+  (*transfers)++; /* one more */
+  rv = CURL_PUSH_OK;
+
+out:
+  return rv;
+}
+
+/*
+ * Download a file over HTTP/2, take care of server push.
+ */
+static int test_h2_serverpush(int argc, char *argv[])
+{
+  CURL *easy;
+  CURLM *multi_handle;
+  int transfers = 1; /* we start with one */
+  struct CURLMsg *m;
+  const char *url;
+
+  if(argc != 2) {
+    fprintf(stderr, "need URL as argument\n");
+    return 2;
+  }
+  url = argv[1];
+
+  multi_handle = curl_multi_init();
+  curl_multi_setopt(multi_handle, CURLMOPT_PIPELINING, CURLPIPE_MULTIPLEX);
+  curl_multi_setopt(multi_handle, CURLMOPT_PUSHFUNCTION, server_push_callback);
+  curl_multi_setopt(multi_handle, CURLMOPT_PUSHDATA, &transfers);
+
+  easy = curl_easy_init();
+  if(setup_h2_serverpush(easy, url)) {
+    fprintf(stderr, "failed\n");
+    return 1;
+  }
+
+  curl_multi_add_handle(multi_handle, easy);
+  do {
+    int still_running; /* keep number of running handles */
+    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;
+
+    /*
+     * A little caution when doing server push is that libcurl itself has
+     * created and added one or more easy handles but we need to clean them up
+     * when we are done.
+     */
+    do {
+      int msgq = 0;
+      m = curl_multi_info_read(multi_handle, &msgq);
+      if(m && (m->msg == CURLMSG_DONE)) {
+        CURL *e = m->easy_handle;
+        transfers--;
+        curl_multi_remove_handle(multi_handle, e);
+        curl_easy_cleanup(e);
+      }
+    } while(m);
+
+  } while(transfers); /* as long as we have transfers going */
+
+  curl_multi_cleanup(multi_handle);
+
+  return 0;
+}