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+---
+c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
+SPDX-License-Identifier: curl
+Title: curl_mime_filedata
+Section: 3
+Source: libcurl
+See-also:
+  - curl_mime_addpart (3)
+  - curl_mime_data (3)
+  - curl_mime_filename (3)
+  - curl_mime_name (3)
+---
+
+# NAME
+
+curl_mime_filedata - set a mime part's body data from a file contents
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_mime_filedata(curl_mimepart *part,
+                            const char *filename);
+~~~
+
+# DESCRIPTION
+
+curl_mime_filedata(3) sets a mime part's body content from the named
+file's contents. This is an alternative to curl_mime_data(3) for setting
+data to a mime part.
+
+*part* is the part's to assign contents to.
+
+*filename* points to the null-terminated file's path name. The pointer can
+be NULL to detach the previous part contents settings. Filename storage can
+be safely be reused after this call.
+
+As a side effect, the part's remote filename is set to the base name of the
+given *filename* if it is a valid named file. This can be undone or
+overridden by a subsequent call to curl_mime_filename(3).
+
+The contents of the file is read during the file transfer in a streaming
+manner to allow huge files to get transferred without using much memory. It
+therefore requires that the file is kept intact during the entire request.
+
+If the file size cannot be determined before actually reading it (such as for
+a character device or named pipe), the whole mime structure containing the
+part is transferred using chunks by HTTP but is rejected by IMAP.
+
+Setting a part's contents multiple times is valid: only the value set by the
+last call is retained.
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  curl_mime *mime;
+  curl_mimepart *part;
+
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    /* create a mime handle */
+    mime = curl_mime_init(curl);
+
+    /* add a part */
+    part = curl_mime_addpart(mime);
+
+    /* send data from this file */
+    curl_mime_filedata(part, "image.png");
+
+    /* set name */
+    curl_mime_name(part, "data");
+  }
+}
+~~~
+
+# 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. CURLE_READ_ERROR is only an
+indication that the file is not yet readable: it can be safely ignored at
+this time, but the file must be made readable before the pertaining
+easy handle is performed.