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-rw-r--r--docs/libcurl/opts/CURLOPT_HEADERFUNCTION.37
1 files changed, 6 insertions, 1 deletions
diff --git a/docs/libcurl/opts/CURLOPT_HEADERFUNCTION.3 b/docs/libcurl/opts/CURLOPT_HEADERFUNCTION.3
index b8596d8fd..d0be953a0 100644
--- a/docs/libcurl/opts/CURLOPT_HEADERFUNCTION.3
+++ b/docs/libcurl/opts/CURLOPT_HEADERFUNCTION.3
@@ -5,7 +5,7 @@
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
-.\" * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
@@ -74,6 +74,11 @@ the trailer.
For non-HTTP protocols like FTP, POP3, IMAP and SMTP this function will get
called with the server responses to the commands that libcurl sends.
+.SH LIMITATIONS
+libcurl does not unfold HTTP "folded headers" (deprecated since RFC 7230). A
+folder header is a header that continues on a subsequent line and starts with
+a whitespace. Such folds will be passed to the header callback as a separate
+one, although strictly it is just a continuation of the previous line.
.SH DEFAULT
Nothing.
.SH PROTOCOLS