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

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 null-
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 multiple times 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.

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");

AVAILABILITY

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

RETURN VALUE