It doesn't seem possible to have libcurl callback a READFUNCTION on a GET
request. I have the following code:

https://gist.github.com/mfine/f98c32e8bbe11f57896388548683433a

#include <stdio.h>
#include <curl/curl.h>

size_t download_write(char *buf, size_t size, size_t n, void *data)
{
  return fwrite(buf, size, n, stdout);
}

size_t upload_read(char *buf, size_t size, size_t n, void *data)
{
  printf("XXXXXX READING!!!\n");
  return 0;
}

int main(void)
{
  CURLcode code = curl_global_init(CURL_GLOBAL_ALL);
  if (code != CURLE_OK) {
    return -1;
  }

  CURL *curl = curl_easy_init();
  if (curl == NULL) {
    return -1;
  }

  struct curl_slist *chunk = NULL;
  chunk = curl_slist_append(chunk, "Transfer-Encoding: chunked");

  curl_easy_setopt(curl, CURLOPT_HTTPHEADER, chunk);
  curl_easy_setopt(curl, CURLOPT_USERAGENT, "my-client/1.0");
  curl_easy_setopt(curl, CURLOPT_URL, "myurl");
  curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, download_write);
  curl_easy_setopt(curl, CURLOPT_READFUNCTION, upload_read);
  curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1L);
  curl_easy_setopt(curl, CURLOPT_VERBOSE, 0L);

  code = curl_easy_perform(curl);
  if (code != CURLE_OK) {
    return -1;
  }

  return 0;
}

The WRITEFUNCTION callback happens, but I never see the READFUNCTION
callback happen. I need to write out a body in the GET request - I thought
if the file descriptor had its read bit set my callback would get called.
Is that ignored on GET requests? I think I've been able to do this with the
utility and @file. Thanks!

Mark

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Received on 2017-06-22