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-rw-r--r--doc/src/manual/gun.asciidoc6
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/src/manual/gun.asciidoc b/doc/src/manual/gun.asciidoc
index 7b9ddd0..7c794ee 100644
--- a/doc/src/manual/gun.asciidoc
+++ b/doc/src/manual/gun.asciidoc
@@ -61,6 +61,12 @@ keepalive => pos_integer()::
empty line when the connection is idle. Gun only makes a best
effort here as servers usually have configurable limits to drop
idle connections. Defaults to 5000.
+transform_header_name => fun((LowercaseName :: binary()) -> TransformedName :: binary()) | undefined::
+ A function that will be applied to all header names before they
+ are sent to the server. Gun assumes that all header names are in
+ lower case. This function is useful if you, for example, need to
+ re-case header names in the event that the server incorrectly
+ considers header name case to be significant.
version => 'HTTP/1.1' | 'HTTP/1.0'::
HTTP version to use. Defaults to 'HTTP/1.1'.