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Diffstat (limited to 'doc/src/manual/gun.head.asciidoc')
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diff --git a/doc/src/manual/gun.head.asciidoc b/doc/src/manual/gun.head.asciidoc new file mode 100644 index 0000000..3d92e38 --- /dev/null +++ b/doc/src/manual/gun.head.asciidoc @@ -0,0 +1,92 @@ += gun:head(3) + +== Name + +gun:head - Get headers of a resource representation + +== Description + +[source,erlang] +---- +head(ConnPid, Path) + -> head(ConnPid, Path, [], #{}). + +head(ConnPid, Path, Headers) + -> head(ConnPid, Path, Headers, #{}) + +head(ConnPid, Path, Headers, ReqOpts) + -> StreamRef + +ConnPid :: pid() +Path :: iodata() +Headers :: [{binary(), iodata()}] +ReqOpts :: gun:req_opts() +StreamRef :: reference() +---- + +Get headers of a resource representation. + +This function performs the same operation as +link:man:gun:get(3)[gun:get(3)], except the server will not +send the resource representation, only the response's status +code and headers. + +While servers are supposed to send the same headers as for +a GET request, they sometimes will not. For example the +`content-length` header may be dropped from the response. + +== Arguments + +ConnPid:: + +The pid of the Gun connection process. + +Path:: + +Path to the resource. + +Headers:: + +Additional request headers. + +ReqOpts:: + +Request options. + +== Return value + +A reference that identifies the newly created stream is +returned. It is this reference that must be passed in +subsequent calls and will be received in messages related +to this new stream. + +== Changelog + +* *1.0*: Function introduced. + +== Examples + +.Get headers of a resource representation +[source,erlang] +---- +StreamRef = gun:head(ConnPid, "/articles", [ + {<<"accept">>, <<"text/html;q=1.0, application/xml;q=0.1">>} +]). +---- + +.Get headers of a resource representation with request options +[source,erlang] +---- +StreamRef = gun:head(ConnPid, "/articles", [], #{ + reply_to => ReplyToPid +}). +---- + +== See also + +link:man:gun(3)[gun(3)], +link:man:gun:get(3)[gun:head(3)], +link:man:gun:await(3)[gun:await(3)], +link:man:gun_push(3)[gun_push(3)], +link:man:gun_inform(3)[gun_inform(3)], +link:man:gun_response(3)[gun_response(3)] |