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CURLOPT_UPLOAD

Section: curl_easy_setopt options (3)
Updated: February 03, 2016
Index Return to Main Contents

 

NAME

CURLOPT_UPLOAD - enable data upload  

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_UPLOAD, long upload);  

DESCRIPTION

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 a 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.  

DEFAULT

0, default is download  

PROTOCOLS

Most  

EXAMPLE

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);
}
 

AVAILABILITY

Always  

RETURN VALUE

Returns CURLE_OK  

SEE ALSO

CURLOPT_PUT(3), CURLOPT_READFUNCTION(3), CURLOPT_INFILESIZE_LARGE(3),


 

Index

NAME
SYNOPSIS
DESCRIPTION
DEFAULT
PROTOCOLS
EXAMPLE
AVAILABILITY
RETURN VALUE
SEE ALSO


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