NAME

       curl_mime_encoder - set a mime part's encoder and content transfer encoding

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_mime_encoder(curl_mimepart * part, const char * encoding);

DESCRIPTION

       curl_mime_encoder() requests a mime part's content to be encoded before being transmitted.

       part  is  the  part's  handle  to  assign  an  encoder.   encoding is a pointer to a zero-
       terminated encoding scheme. It may be  set  to  NULL  to  disable  an  encoder  previously
       attached to the part. The encoding scheme storage may safely be reused after this function
       returns.

       Setting a part's encoder twice is valid: only the value set by the last call is retained.

       Upon multipart rendering, the part's content is encoded according to the pertaining scheme
       and a corresponding Content-Transfer-Encoding" header is added to the part.

       Supported encoding schemes are:
       "binary": the data is left unchanged, the header is added.
       "8bit": header added, no data change.
       "7bit":  the data is unchanged, but is each byte is checked to be a 7-bit value; if not, a
       read error occurs.
       "base64": Data is converted to base64 encoding, then split in CRLF-terminated lines of  at
       most 76 characters.
       "quoted-printable":  data  is  encoded in quoted printable lines of at most 76 characters.
       Since the resulting size of the final data cannot  be  determined  prior  to  reading  the
       original  data,  it  is  left  as  unknown, causing chunked transfer in HTTP. For the same
       reason, this encoder may not be used with IMAP. This encoder targets  text  data  that  is
       mostly ASCII and should not be used with other types of data.

       If  the  original  data  is  already  encoded in such a scheme, a custom Content-Transfer-
       Encoding header should be  added  with  curl_mime_headers()  instead  of  setting  a  part
       encoder.

       Encoding should not be applied to multiparts, thus the use of this function on a part with
       content set with curl_mime_subparts() is strongly discouraged.

AVAILABILITY

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

RETURN VALUE

       CURLE_OK or a CURL error code upon failure.

EXAMPLE

        curl_mime *mime;
        curl_mimepart *part;

        /* create a mime handle */
        mime = curl_mime_init(easy);

        /* add a part */
        part = curl_mime_addpart(mime);

        /* send a file */
        curl_mime_filedata(part, "image.png");

        /* encode file data in base64 for transfer */
        curl_mime_encoder(part, "base64");

SEE ALSO

       curl_mime_addpart(3), curl_mime_headers(3), curl_mime_subparts(3)