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curl_mime_data(3) libcurl Manual curl_mime_data(3)


curl_mime_data - set a mime part's body data from memory


#include <curl/curl.h>

CURLcode curl_mime_data(curl_mimepart * part, const char * data , size_t datasize);


curl_mime_data(3) sets a mime part's body content from memory data.

data points to the data bytes: those are copied to the part and their storage may safely be reused after call. datasize is the number of data bytes: it can be set to CURL_ZERO_TERMINATED to indicate data is a null-terminated character string. part is the part's to assign contents to.

Setting a part's contents twice is valid: only the value set by the last call is retained. It is possible to unassign part's contents by setting data to NULL.

Setting very large data is memory consuming: one might consider using curl_mime_data_cb(3) in such a case.


As long as at least one of HTTP, SMTP or IMAP is enabled. Added in 7.56.0.


CURLE_OK or a CURL error code upon failure.


curl_mime *mime;
curl_mimepart *part;
/* create a mime handle */
mime = curl_mime_init(easy);
/* add a part */
part = curl_mime_addpart(mime);
/* add data to the part */
curl_mime_data(part, "raw contents to send", CURL_ZERO_TERMINATED);


curl_mime_addpart(3), curl_mime_data_cb(3), curl_mime_name(3), curl_mime_type(3)

November 4, 2020 libcurl 7.74.0