How do I POST a buffer of JSON using libcurl?

Question

My C++ program currently invokes curl through a pipe (popen(\"curl ...\")) to POST a file of JSON data to a web server. This has obvious performance limitations due

Answer 1

Also, you may use RAW input instead of adding extra backslashes:

curl_easy_setopt(curl, CURLOPT_POSTFIELDS, R"anydelim( {"hi" : "there"} )anydelim");

with delimiter or without it.