libcurl API介紹[官網]

資料來源:https://curl.haxx.se/libcurl/c/

curl_easy_init() 
curl_easy_cleanup() 
curl_easy_setopt() 
curl_easy_perform() 
curl_easy_getinfo()

While the above functions are the main functions to use in the easy interface, there is a series of other helpful functions too including:

curl_version()    returns a pointer to the libcurl version string
curl_getdate()    converts a date string to time_t
curl_formadd()    build multipart form-data posts
curl_formfree()    free a previously built form POST
curl_slist_append()    builds a linked list
curl_slist_free_all()    frees a whole curl_slist as made with curl_slist_append()
curl_easy_escape()    URL encodes a string
curl_easy_unescape()    URL decodes a string