un-nest curl

curl-8.15.0/docs/examples/http2-upload.c

@@ -0,0 +1,343 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  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>
+ * Multiplexed HTTP/2 uploads over a single connection
+ * </DESC>
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#ifdef UNDER_CE
+#define strerror(e) "?"
+#else
+#include <errno.h>
+#endif
+
+/* somewhat Unix-specific */
+#ifndef _MSC_VER
+#include <sys/time.h>
+#include <unistd.h>
+#endif
+
+#ifdef _WIN32
+#undef stat
+#define stat _stat
+#endif
+
+/* curl stuff */
+#include <curl/curl.h>
+#include <curl/mprintf.h>
+
+#ifndef CURLPIPE_MULTIPLEX
+/* This little trick makes sure that we do not enable pipelining for libcurls
+   old enough to not have this symbol. It is _not_ defined to zero in a recent
+   libcurl header. */
+#define CURLPIPE_MULTIPLEX 0
+#endif
+
+#define NUM_HANDLES 1000
+
+#ifdef _MSC_VER
+#define gettimeofday(a, b) my_gettimeofday((a), (b))
+static
+int my_gettimeofday(struct timeval *tp, void *tzp)
+{
+  (void)tzp;
+  if(tp) {
+    /* Offset between 1601-01-01 and 1970-01-01 in 100 nanosec units */
+    #define _WIN32_FT_OFFSET (116444736000000000)
+    union {
+      CURL_TYPEOF_CURL_OFF_T ns100; /* time since 1 Jan 1601 in 100ns units */
+      FILETIME ft;
+    } _now;
+    GetSystemTimeAsFileTime(&_now.ft);
+    tp->tv_usec = (long)((_now.ns100 / 10) % 1000000);
+    tp->tv_sec = (long)((_now.ns100 - _WIN32_FT_OFFSET) / 10000000);
+  }
+  return 0;
+}
+#endif
+
+struct input {
+  FILE *in;
+  size_t bytes_read; /* count up */
+  CURL *hnd;
+  int num;
+};
+
+static
+void dump(const char *text, int num, unsigned char *ptr, size_t size,
+          char nohex)
+{
+  size_t i;
+  size_t c;
+  unsigned int width = 0x10;
+
+  if(nohex)
+    /* without the hex output, we can fit more on screen */
+    width = 0x40;
+
+  fprintf(stderr, "%d %s, %lu bytes (0x%lx)\n",
+          num, text, (unsigned long)size, (unsigned long)size);
+
+  for(i = 0; i < size; i += width) {
+
+    fprintf(stderr, "%4.4lx: ", (unsigned long)i);
+
+    if(!nohex) {
+      /* hex not disabled, show it */
+      for(c = 0; c < width; c++)
+        if(i + c < size)
+          fprintf(stderr, "%02x ", ptr[i + c]);
+        else
+          fputs("   ", stderr);
+    }
+
+    for(c = 0; (c < width) && (i + c < size); c++) {
+      /* check for 0D0A; if found, skip past and start a new line of output */
+      if(nohex && (i + c + 1 < size) && ptr[i + c] == 0x0D &&
+         ptr[i + c + 1] == 0x0A) {
+        i += (c + 2 - width);
+        break;
+      }
+      fprintf(stderr, "%c",
+              (ptr[i + c] >= 0x20) && (ptr[i + c] < 0x80) ? ptr[i + c] : '.');
+      /* check again for 0D0A, to avoid an extra \n if it's at width */
+      if(nohex && (i + c + 2 < size) && ptr[i + c + 1] == 0x0D &&
+         ptr[i + c + 2] == 0x0A) {
+        i += (c + 3 - width);
+        break;
+      }
+    }
+    fputc('\n', stderr); /* newline */
+  }
+}
+
+static
+int my_trace(CURL *handle, curl_infotype type,
+             char *data, size_t size,
+             void *userp)
+{
+  char timebuf[60];
+  const char *text;
+  struct input *i = (struct input *)userp;
+  int num = i->num;
+  static time_t epoch_offset;
+  static int    known_offset;
+  struct timeval tv;
+  time_t secs;
+  struct tm *now;
+  (void)handle; /* prevent compiler warning */
+
+  gettimeofday(&tv, NULL);
+  if(!known_offset) {
+    epoch_offset = time(NULL) - tv.tv_sec;
+    known_offset = 1;
+  }
+  secs = epoch_offset + tv.tv_sec;
+  /* !checksrc! disable BANNEDFUNC 1 */
+  now = localtime(&secs);  /* not thread safe but we do not care */
+  curl_msnprintf(timebuf, sizeof(timebuf), "%02d:%02d:%02d.%06ld",
+                 now->tm_hour, now->tm_min, now->tm_sec, (long)tv.tv_usec);
+
+  switch(type) {
+  case CURLINFO_TEXT:
+    fprintf(stderr, "%s [%d] Info: %s", timebuf, num, 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, num, (unsigned char *)data, size, 1);
+  return 0;
+}
+
+static size_t read_callback(char *ptr, size_t size, size_t nmemb, void *userp)
+{
+  struct input *i = userp;
+  size_t retcode = fread(ptr, size, nmemb, i->in);
+  i->bytes_read += retcode;
+  return retcode;
+}
+
+static int setup(struct input *i, int num, const char *upload)
+{
+  FILE *out;
+  char url[256];
+  char filename[128];
+  struct stat file_info;
+  curl_off_t uploadsize;
+  CURL *hnd;
+
+  hnd = i->hnd = NULL;
+
+  i->num = num;
+  curl_msnprintf(filename, 128, "dl-%d", num);
+  out = fopen(filename, "wb");
+  if(!out) {
+    fprintf(stderr, "error: could not open file %s for writing: %s\n", upload,
+            strerror(errno));
+    return 1;
+  }
+
+  curl_msnprintf(url, 256, "https://localhost:8443/upload-%d", num);
+
+  /* get the file size of the local file */
+  if(stat(upload, &file_info)) {
+    fprintf(stderr, "error: could not stat file %s: %s\n", upload,
+            strerror(errno));
+    fclose(out);
+    return 1;
+  }
+
+  uploadsize = file_info.st_size;
+
+  i->in = fopen(upload, "rb");
+  if(!i->in) {
+    fprintf(stderr, "error: could not open file %s for reading: %s\n", upload,
+            strerror(errno));
+    fclose(out);
+    return 1;
+  }
+
+  hnd = i->hnd = curl_easy_init();
+
+  /* write to this file */
+  curl_easy_setopt(hnd, CURLOPT_WRITEDATA, out);
+
+  /* we want to use our own read function */
+  curl_easy_setopt(hnd, CURLOPT_READFUNCTION, read_callback);
+  /* read from this file */
+  curl_easy_setopt(hnd, CURLOPT_READDATA, i);
+  /* provide the size of the upload */
+  curl_easy_setopt(hnd, CURLOPT_INFILESIZE_LARGE, uploadsize);
+
+  /* send in the URL to store the upload as */
+  curl_easy_setopt(hnd, CURLOPT_URL, url);
+
+  /* upload please */
+  curl_easy_setopt(hnd, CURLOPT_UPLOAD, 1L);
+
+  /* please be verbose */
+  curl_easy_setopt(hnd, CURLOPT_VERBOSE, 1L);
+  curl_easy_setopt(hnd, CURLOPT_DEBUGFUNCTION, my_trace);
+  curl_easy_setopt(hnd, CURLOPT_DEBUGDATA, i);
+
+  /* HTTP/2 please */
+  curl_easy_setopt(hnd, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2_0);
+
+  /* we use a self-signed test server, skip verification during debugging */
+  curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYPEER, 0L);
+  curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYHOST, 0L);
+
+#if (CURLPIPE_MULTIPLEX > 0)
+  /* wait for pipe connection to confirm */
+  curl_easy_setopt(hnd, CURLOPT_PIPEWAIT, 1L);
+#endif
+  return 0;
+}
+
+/*
+ * Upload all files over HTTP/2, using the same physical connection!
+ */
+int main(int argc, char **argv)
+{
+  struct input trans[NUM_HANDLES];
+  CURLM *multi_handle;
+  int i;
+  int still_running = 0; /* keep number of running handles */
+  const char *filename = "index.html";
+  int num_transfers;
+
+  if(argc > 1) {
+    /* if given a number, do that many transfers */
+    num_transfers = atoi(argv[1]);
+
+    if(!num_transfers || (num_transfers > NUM_HANDLES))
+      num_transfers = 3; /* a suitable low default */
+
+    if(argc > 2)
+      /* if given a file name, upload this! */
+      filename = argv[2];
+  }
+  else
+    num_transfers = 3;
+
+  /* init a multi stack */
+  multi_handle = curl_multi_init();
+
+  for(i = 0; i < num_transfers; i++) {
+    if(setup(&trans[i], i, filename))
+      return 1;
+
+    /* add the individual transfer */
+    curl_multi_add_handle(multi_handle, trans[i].hnd);
+  }
+
+  curl_multi_setopt(multi_handle, CURLMOPT_PIPELINING, CURLPIPE_MULTIPLEX);
+
+  /* We do HTTP/2 so let's stick to one connection per host */
+  curl_multi_setopt(multi_handle, CURLMOPT_MAX_HOST_CONNECTIONS, 1L);
+
+  do {
+    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;
+
+  } while(still_running);
+
+  curl_multi_cleanup(multi_handle);
+
+  for(i = 0; i < num_transfers; i++) {
+    curl_multi_remove_handle(multi_handle, trans[i].hnd);
+    curl_easy_cleanup(trans[i].hnd);
+  }
+
+  return 0;
+}