RequestBin seems to be unable to deal properly with chunked posts.
I tried your example against my own server (Apache+mod_cgi+Perl), and it works:
https://gist.github.com/p120ph37/9490dc9a8a1b5a38b9a2 <https://gist.github.com/p120ph37/9490dc9a8a1b5a38b9a2>

-Aaron

> On Aug 30, 2015, at 3:40 AM, Erik Ronström <erik.ronstrom_at_doremir.com> wrote:
>
> Hi curlers,
>
> I’m trying to do a chunked POST, taking the post-callback example as a starting point. However, it appears that unless I provide a content length (with CURLOPT_POSTFIELDSIZE), the post data is being sent. The read callback is being called, but no body data is actually being sent to the server.
>
> Below is the code used, and its output. libcurl says the request is 65525 bytes, but RequestBin says ”Form/Post Parameters: None” and ”Raw Body: None”. (http://requestb.in/1glodpr1?inspect#1mtrcf)
>
> What am I missing here? Probably something trivial, but I cannot figure it out!
>
> Many thanks
> Erik
>
>
> static size_t _upload_read_function(void *ptr, size_t size, size_t nmemb, void *data)
> {
> struct WriteThis *pooh = (struct WriteThis *)data;
> size_t max_bytes = size*nmemb;
> if (max_bytes < 1)
> return 0;
>
> if (pooh->sizeleft) {
> size_t bytes = max_bytes < pooh->sizeleft ? max_bytes : pooh->sizeleft;
> memcpy(ptr, pooh->readptr, bytes);
> pooh->readptr += bytes;
> pooh->sizeleft -= bytes;
> printf("upload_read_function: %zu bytes (%ld left)\n", bytes, pooh->sizeleft);
> return size*nmemb;
> }
>
> return 0;
> }
>
>
> int main(int argc, char const *argv[])
> {
> curl_version_info_data *curl_version = curl_version_info(CURLVERSION_NOW);
> printf("libcurl: %s\n", curl_version->version);
>
> size_t buffer_size = ... ;
> unsigned char *ogg_buffer = ... ;
>
> struct WriteThis pooh;
> pooh.readptr = ogg_buffer;
> pooh.sizeleft = buffer_size;
>
> CURL *curl = curl_easy_init();
> if (curl) {
> curl_easy_setopt(curl, CURLOPT_URL, "http://requestb.in/1glodpr1");
> curl_easy_setopt(curl, CURLOPT_POST, 1L);
> 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_POSTFIELDSIZE, buffer_size); // <-- if this line is enabled, data is sent correctly
> curl_easy_setopt(curl, CURLOPT_READDATA, &pooh);
> curl_easy_setopt(curl, CURLOPT_READFUNCTION, _upload_read_function);
> curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
> CURLcode res = curl_easy_perform(curl);
>
> if (res == CURLE_OK) {
> long response_code;
> double request_size;
> curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &response_code);
> curl_easy_getinfo(curl, CURLINFO_SIZE_UPLOAD, &request_size);
> printf("Server responeded with %d, request was %f bytes\n", response_code, request_size);
> } else {
> fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
> }
>
> // Cleanup
> curl_slist_free_all(chunk);
> curl_easy_cleanup(curl);
> }
>
>
> libcurl: 7.37.1
> * Hostname was NOT found in DNS cache
> * Trying 54.225.217.107...
> * Connected to requestb.in (54.225.217.107) port 80 (#0)
>> POST /1glodpr1 HTTP/1.1
> Host: requestb.in
> Accept: */*
> Transfer-Encoding: chunked
> Content-Type: application/x-www-form-urlencoded
> Expect: 100-continue
>
> < HTTP/1.1 100 Continue
> upload_read_function: 16372 bytes (48988 left)
> upload_read_function: 16372 bytes (32616 left)
> upload_read_function: 16372 bytes (16244 left)
> upload_read_function: 16244 bytes (0 left)
> < HTTP/1.1 200 OK
> < Connection: close
> * Server gunicorn/19.3.0 is not blacklisted
> < Server: gunicorn/19.3.0
> < Date: Sun, 30 Aug 2015 08:33:07 GMT
> < Content-Type: text/html; charset=utf-8
> < Content-Length: 2
> < Sponsored-By: https://www.runscope.com
> < Via: 1.1 vegur
> <
> * Closing connection 0
> ok
> Server responeded with 200, request was 65525.000000 bytes
>
>
>
>
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Received on 2015-08-30