Reproducing curl issue #14892

git-h2-upload.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <errno.h>

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

struct input {
  FILE *in;
  size_t bytes_read; /* count up */
  CURL *hnd;
};

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 void setup(struct input *i, const char *upload)
{
  FILE *out;
  char url[256];
  char filename[128];
  CURL *hnd;

  if(!i->hnd)
    i->hnd = curl_easy_init();
  hnd = i->hnd;

  i->in = fopen(upload, "rb");
  if(!i->in) {
    fprintf(stderr, "error: could not open file %s for reading: %s\n", upload,
            strerror(errno));
    exit(1);
  }

  /* 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);

  /* send in the URL to store the upload as */
  curl_easy_setopt(hnd, CURLOPT_URL, "https://curl.se");

  /* upload please */
  curl_easy_setopt(hnd, CURLOPT_POST, 1L);

  /* please be verbose */
  curl_easy_setopt(hnd, CURLOPT_VERBOSE, 1L);

  /* HTTP/2 please */
  curl_easy_setopt(hnd, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2_0);

}

/*
 * Upload all files over HTTP/2, using the same physical connection!
 */
struct input trans;
int main(int argc, char **argv)
{
  const char *filename = "5K";

  setup(&trans, filename);
  curl_easy_perform(trans.hnd);
  fclose(trans.in);

  setup(&trans, filename);
  curl_easy_perform(trans.hnd);
  fclose(trans.in);

  curl_easy_cleanup(trans.hnd);

  return 0;
}