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curl_mime_subparts(3) libcurl curl_mime_subparts(3) NAME curl_mime_subparts - set sub-parts of a multipart mime part SYNOPSIS #include <curl/curl.h> CURLcode curl_mime_subparts(curl_mimepart *part, curl_mime *subparts); DESCRIPTION curl_mime_subparts(3) sets a multipart mime part's content from a mime structure. part is a handle to the multipart part. subparts is a mime structure handle holding the sub-parts. After curl_mime_subparts(3) succeeds, the mime structure handle belongs to the multipart part and must not be freed explicitly. It may however be updated by subsequent calls to mime API functions. Setting a part's contents multiple times is valid: only the value set by the last call is retained. It is possible to unassign previous part's contents by setting subparts to NULL. EXAMPLE static char *inline_html = "<title>example</title>"; static char *inline_text = "once upon the time"; int main(void) { CURL *curl = curl_easy_init(); if(curl) { struct curl_slist *slist; /* The inline part is an alternative proposing the html and the text versions of the email. */ curl_mime *alt = curl_mime_init(curl); curl_mimepart *part; /* HTML message. */ part = curl_mime_addpart(alt); curl_mime_data(part, inline_html, CURL_ZERO_TERMINATED); curl_mime_type(part, "text/html"); /* Text message. */ part = curl_mime_addpart(alt); curl_mime_data(part, inline_text, CURL_ZERO_TERMINATED); /* Create the inline part. */ part = curl_mime_addpart(alt); curl_mime_subparts(part, alt); curl_mime_type(part, "multipart/alternative"); slist = curl_slist_append(NULL, "Content-Disposition: inline"); curl_mime_headers(part, slist, 1); } CURLE_OK or a CURL error code upon failure. SEE ALSO curl_mime_addpart(3), curl_mime_init(3) libcurl 8.5.0 December 4, 2023 curl_mime_subparts(3)