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86 lines
2.7 KiB
Groff
86 lines
2.7 KiB
Groff
.\" generated by cd2nroff 0.1 from curl_mime_encoder.md
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.TH curl_mime_encoder 3 libcurl
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.SH NAME
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curl_mime_encoder \- set a mime part\(aqs encoder and content transfer encoding
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLcode curl_mime_encoder(curl_mimepart *part, const char *encoding);
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.fi
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.SH DESCRIPTION
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curl_mime_encoder() requests a mime part\(aqs content to be encoded before being
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transmitted.
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\fIpart\fP is the part\(aqs handle to assign an encoder.
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\fIencoding\fP is a pointer to a null\-terminated encoding scheme. It may be
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set to NULL to disable an encoder previously attached to the part. The encoding
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scheme storage may safely be reused after this function returns.
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Setting a part\(aqs encoder multiple times is valid: only the value set by the
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last call is retained.
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Upon multipart rendering, the part\(aqs content is encoded according to the
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pertaining scheme and a corresponding \fI"Content\-Transfer\-Encoding"\fP header
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is added to the part.
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Supported encoding schemes are:
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\&"\fIbinary\fP": the data is left unchanged, the header is added.
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\&"\fI8bit\fP": header added, no data change.
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\&"\fI7bit\fP": the data is unchanged, but is each byte is checked
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to be a 7\-bit value; if not, a read error occurs.
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\&"\fIbase64\fP": Data is converted to base64 encoding, then split in
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CRLF\-terminated lines of at most 76 characters.
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\&"\fIquoted\-printable\fP": data is encoded in quoted printable lines of
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at most 76 characters. Since the resulting size of the final data cannot be
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determined prior to reading the original data, it is left as unknown, causing
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chunked transfer in HTTP. For the same reason, this encoder may not be used
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with IMAP. This encoder targets text data that is mostly ASCII and should
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not be used with other types of data.
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If the original data is already encoded in such a scheme, a custom
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\fIContent\-Transfer\-Encoding\fP header should be added with
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\fIcurl_mime_headers(3)\fP instead of setting a part encoder.
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Encoding should not be applied to multiparts, thus the use of this function on
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a part with content set with \fIcurl_mime_subparts(3)\fP is strongly
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discouraged.
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.SH PROTOCOLS
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HTTP, IMAP and SMTP
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.SH EXAMPLE
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.nf
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int main(void)
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{
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curl_mime *mime;
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curl_mimepart *part;
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CURL *curl = curl_easy_init();
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if(curl) {
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/* create a mime handle */
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mime = curl_mime_init(curl);
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/* add a part */
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part = curl_mime_addpart(mime);
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/* send a file */
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curl_mime_filedata(part, "image.png");
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/* encode file data in base64 for transfer */
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curl_mime_encoder(part, "base64");
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}
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}
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.fi
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.SH AVAILABILITY
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As long as at least one of HTTP, SMTP or IMAP is enabled. Added in 7.56.0.
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.SH RETURN VALUE
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CURLE_OK or a CURL error code upon failure.
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.SH SEE ALSO
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.BR curl_mime_addpart (3),
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.BR curl_mime_headers (3),
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.BR curl_mime_subparts (3)
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