CURLOPT_RESUME_FROM_LARGE − offset to resume transfer from
#include <curl/curl.h>
CURLcode
curl_easy_setopt(CURL *handle, CURLOPT_RESUME_FROM_LARGE,
curl_off_t from);
Pass a curl_off_t as parameter. It contains the offset in number of bytes that you want the transfer to start from. Set this option to 0 to make the transfer start from the beginning (effectively disabling resume). For FTP, set this option to -1 to make the transfer start from the end of the target file (useful to continue an interrupted upload).
When doing uploads with FTP, the resume position is where in the local/source file libcurl should try to resume the upload from and it appends the source file to the remote target file.
0, not used
HTTP, FTP, SFTP, FILE
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
curl_off_t resume_position; /* get it somehow */
curl_off_t file_size; /* get it somehow as well */
curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com");
/* resuming
upload at this position, possibly beyond 2GB */
curl_easy_setopt(curl, CURLOPT_RESUME_FROM_LARGE,
resume_position);
/* ask for
upload */
curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
/* set total
data amount to expect */
curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE,
file_size);
/* Perform the
request */
curl_easy_perform(curl);
}
}
Added in 7.11.0
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
CURLOPT_INFILESIZE_LARGE(3), CURLOPT_RANGE(3), CURLOPT_RESUME_FROM(3)