**************************************************************************
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* Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
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* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
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* furnished to do so, under the terms of the COPYING file.
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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**************************************************************************

CURLOPT_UPLOAD - enable data upload #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_UPLOAD, long upload); The long parameter upload set to 1 tells the library to prepare for and perform an upload. The CURLOPT_READDATA(3) and CURLOPT_INFILESIZE(3) or CURLOPT_INFILESIZE_LARGE(3) options are also interesting for uploads. If the protocol is HTTP, uploading means using the PUT request unless you tell libcurl otherwise. Using PUT with HTTP 1.1 implies the use of a "Expect: 100-continue" header. You can disable this header with CURLOPT_HTTPHEADER(3) as usual. If you use PUT to an HTTP 1.1 server, you can upload data without knowing the size before starting the transfer if you use chunked encoding. You enable this by adding a header like "Transfer-Encoding: chunked" with CURLOPT_HTTPHEADER(3). With HTTP 1.0 or without chunked transfer, you must specify the size. 0, default is download Most

CURL *curl = curl_easy_init();
if(curl) {
 /* we want to use our own read function */
 curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback);

 /* enable uploading */
 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);

 /* specify target */
 curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/dir/to/newfile");

 /* now specify which pointer to pass to our callback */
 curl_easy_setopt(curl, CURLOPT_READDATA, hd_src);

 /* Set the size of the file to upload */
 curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, (curl_off_t)fsize);

 /* Now run off and do what you've been told! */
 curl_easy_perform(curl);
}

Always Returns CURLE_OK CURLOPT_PUT "(3), " CURLOPT_READFUNCTION "(3), " CURLOPT_INFILESIZE_LARGE "(3), "