On Tue, 14 Feb 2017, Jan wrote:

> I have to admit, I use also such an option:

> curl_easy_setopt(curl, CURLOPT_HTTPHEADER, "Key:abcdefz1234567");

That's it then. CURLOPT_HTTPHEADER does not take a string as an argument like
that, it takes a pointer to a 'struct curl_slist' ...

  CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HTTPHEADER,
                            struct curl_slist *headers);

See https://curl.haxx.se/libcurl/c/CURLOPT_HTTPHEADER.html

-- 
  / daniel.haxx.se
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