curl_mime_encoder(3) libcurl Manual curl_mime_encoder(3)
NAME
curl_mime_encoder - set a mime part's encoder and content transfer en-
coding
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 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-ter-
minated 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 un-
known, causing chunked transfer in HTTP. For the same reason, this en-
coder 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 Con-
tent-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
CURLE_OK or a CURL error code upon failure.
SEE ALSO
curl_mime_addpart(3), curl_mime_headers(3), curl_mime_subparts(3)
libcurl 7.81.0 November 26, 2021 curl_mime_encoder(3)
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