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📄 10-at-a-time.c(4.24 KB)
📄 Makefile.example(1.86 KB)
📄 README.md(1.35 KB)
📄 altsvc.c(1.83 KB)
📄 anyauthput.c(4.82 KB)
📄 cacertinmem.c(7.14 KB)
📄 certinfo.c(2.25 KB)
📄 chkspeed.c(6.54 KB)
📄 cookie_interface.c(4.03 KB)
📄 crawler.c(6.53 KB)
📄 curlgtk.c(2.94 KB)
📄 curlx.c(16.41 KB)
📄 debug.c(4.21 KB)
📄 ephiperfifo.c(14.49 KB)
📄 evhiperfifo.c(11.9 KB)
📄 externalsocket.c(4.83 KB)
📄 fileupload.c(2.78 KB)
📄 fopen.c(13.87 KB)
📄 ftp-wildcard.c(4.15 KB)
📄 ftpget.c(2.59 KB)
📄 ftpgetinfo.c(2.86 KB)
📄 ftpgetresp.c(2.51 KB)
📄 ftpsget.c(2.89 KB)
📄 ftpupload.c(4.48 KB)
📄 ftpuploadfrommem.c(3.81 KB)
📄 ftpuploadresume.c(4.24 KB)
📄 getinfo.c(1.62 KB)
📄 getinmemory.c(3.24 KB)
📄 getredirect.c(2.3 KB)
📄 getreferrer.c(1.81 KB)
📄 ghiper.c(12.04 KB)
📄 hiperfifo.c(11.97 KB)
📄 href_extractor.c(2.61 KB)
📄 htmltidy.c(3.88 KB)
📄 htmltitle.cpp(6.23 KB)
📄 http-post.c(1.99 KB)
📄 http2-download.c(6.19 KB)
📄 http2-pushinmemory.c(5.02 KB)
📄 http2-serverpush.c(7.1 KB)
📄 http2-upload.c(8.05 KB)
📄 http3-present.c(1.53 KB)
📄 http3.c(1.81 KB)
📄 httpcustomheader.c(2.27 KB)
📄 httpput-postfields.c(3.36 KB)
📄 httpput.c(3.6 KB)
📄 https.c(2.53 KB)
📄 imap-append.c(3.77 KB)
📄 imap-authzid.c(2.21 KB)
📄 imap-copy.c(2.35 KB)
📄 imap-create.c(2.06 KB)
📄 imap-delete.c(2.06 KB)
📄 imap-examine.c(2.11 KB)
📄 imap-fetch.c(1.95 KB)
📄 imap-list.c(2.08 KB)
📄 imap-lsub.c(2.08 KB)
📄 imap-multi.c(2.29 KB)
📄 imap-noop.c(2 KB)
📄 imap-search.c(2.35 KB)
📄 imap-ssl.c(3.25 KB)
📄 imap-store.c(2.69 KB)
📄 imap-tls.c(3.5 KB)
📄 makefile.dj(1.58 KB)
📄 multi-app.c(3.36 KB)
📄 multi-debugcallback.c(4.21 KB)
📄 multi-double.c(2.62 KB)
📄 multi-event.c(6.01 KB)
📄 multi-formadd.c(3.23 KB)
📄 multi-legacy.c(5.13 KB)
📄 multi-post.c(3.04 KB)
📄 multi-single.c(2.49 KB)
📄 multi-uv.c(5.97 KB)
📄 multithread.c(2.59 KB)
📄 opensslthreadlock.c(2.69 KB)
📄 parseurl.c(2.13 KB)
📄 persistent.c(2.15 KB)
📄 pop3-authzid.c(2.18 KB)
📄 pop3-dele.c(2.15 KB)
📄 pop3-list.c(1.93 KB)
📄 pop3-multi.c(2.29 KB)
📄 pop3-noop.c(2.11 KB)
📄 pop3-retr.c(1.93 KB)
📄 pop3-ssl.c(3.22 KB)
📄 pop3-stat.c(2.13 KB)
📄 pop3-tls.c(3.47 KB)
📄 pop3-top.c(2.09 KB)
📄 pop3-uidl.c(2.03 KB)
📄 post-callback.c(5.15 KB)
📄 postinmemory.c(3.36 KB)
📄 postit2-formadd.c(3.51 KB)
📄 postit2.c(3.41 KB)
📄 progressfunc.c(4.8 KB)
📄 resolve.c(1.92 KB)
📄 rtsp.c(9.02 KB)
📄 sampleconv.c(3.25 KB)
📄 sendrecv.c(4.52 KB)
📄 sepheaders.c(2.67 KB)
📄 sessioninfo.c(3.06 KB)
📄 sftpget.c(3.25 KB)
📄 sftpuploadresume.c(3.82 KB)
📄 shared-connection-cache.c(2.51 KB)
📄 simple.c(1.68 KB)
📄 simplepost.c(1.83 KB)
📄 simplessl.c(4.56 KB)
📄 smooth-gtk-thread.c(6.01 KB)
📄 smtp-authzid.c(5.33 KB)
📄 smtp-expn.c(2.55 KB)
📄 smtp-mail.c(4.86 KB)
📄 smtp-mime.c(5.47 KB)
📄 smtp-multi.c(4.54 KB)
📄 smtp-ssl.c(5.75 KB)
📄 smtp-tls.c(6.21 KB)
📄 smtp-vrfy.c(2.62 KB)
📄 sslbackend.c(2.29 KB)
📄 synctime.c(12.6 KB)
📄 threaded-ssl.c(4.34 KB)
📄 url2file.c(2.43 KB)
📄 urlapi.c(1.98 KB)
📄 usercertinmem.c(8.87 KB)
📄 xmlstream.c(4.94 KB)

Editing: http2-download.c

/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2021, 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.
 *
 ***************************************************************************/
/* <DESC>
 * Multiplexed HTTP/2 downloads over a single connection
 * </DESC>
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>

/* somewhat unix-specific */
#include <sys/time.h>
#include <unistd.h>

/* curl stuff */
#include <curl/curl.h>
#include <curl/mprintf.h>

#ifndef CURLPIPE_MULTIPLEX
/* This little trick will just make sure that we don't 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

struct transfer {
  CURL *easy;
  unsigned int num;
  FILE *out;
};

#define NUM_HANDLES 1000

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)
{
  const char *text;
  struct transfer *t = (struct transfer *)userp;
  unsigned int num = t->num;
  (void)handle; /* prevent compiler warning */

switch(type) {
  case CURLINFO_TEXT:
    fprintf(stderr, "== %u Info: %s", num, data);
    /* FALLTHROUGH */
  default: /* in case a new one is introduced to shock us */
    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;
  }

dump(text, num, (unsigned char *)data, size, 1);
  return 0;
}

static void setup(struct transfer *t, int num)
{
  char filename[128];
  CURL *hnd;

hnd = t->easy = curl_easy_init();

curl_msnprintf(filename, 128, "dl-%d", num);

t->out = fopen(filename, "wb");
  if(!t->out) {
    fprintf(stderr, "error: could not open file %s for writing: %s\n",
            filename, strerror(errno));
    exit(1);
  }

/* write to this file */
  curl_easy_setopt(hnd, CURLOPT_WRITEDATA, t->out);

/* set the same URL */
  curl_easy_setopt(hnd, CURLOPT_URL, "https://localhost:8443/index.html");

/* please be verbose */
  curl_easy_setopt(hnd, CURLOPT_VERBOSE, 1L);
  curl_easy_setopt(hnd, CURLOPT_DEBUGFUNCTION, my_trace);
  curl_easy_setopt(hnd, CURLOPT_DEBUGDATA, t);

/* 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
}

/*
 * Download many transfers over HTTP/2, using the same connection!
 */
int main(int argc, char **argv)
{
  struct transfer trans[NUM_HANDLES];
  CURLM *multi_handle;
  int i;
  int still_running = 0; /* keep number of running handles */
  int num_transfers;
  if(argc > 1) {
    /* if given a number, do that many transfers */
    num_transfers = atoi(argv[1]);
    if((num_transfers < 1) || (num_transfers > NUM_HANDLES))
      num_transfers = 3; /* a suitable low default */
  }
  else
    num_transfers = 3; /* suitable default */

/* init a multi stack */
  multi_handle = curl_multi_init();

for(i = 0; i < num_transfers; i++) {
    setup(&trans[i], i);

/* add the individual transfer */
    curl_multi_add_handle(multi_handle, trans[i].easy);
  }

curl_multi_setopt(multi_handle, CURLMOPT_PIPELINING, CURLPIPE_MULTIPLEX);

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);

for(i = 0; i < num_transfers; i++) {
    curl_multi_remove_handle(multi_handle, trans[i].easy);
    curl_easy_cleanup(trans[i].easy);
  }

curl_multi_cleanup(multi_handle);

return 0;
}

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Editing: http2-download.c

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