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url and host_url may return undefined

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this can happen when the request parsing fails and onresponse
needs the url, its perfectly possible that the url has not
yet been defined
This commit is contained in:
Tom Burdick 2012-11-27 13:22:38 -06:00
parent 5e6aab756a
commit b63502e32e
1 changed files with 14 additions and 4 deletions
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18
src/cowboy_req.erl
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@ -313,7 +313,9 @@ fragment(Req) ->
%%
%% The URL includes the scheme, host and port only.
%% @see cowboy_req:url/1
-spec host_url(Req) -> {binary(), Req} when Req::req().
-spec host_url(Req) -> {undefined | binary(), Req} when Req::req().
host_url(Req=#http_req{port=undefined}) ->
{undefined, Req};
host_url(Req=#http_req{transport=Transport, host=Host, port=Port}) ->
TransportName = Transport:name(),
Secure = case TransportName of
@ -330,9 +332,14 @@ host_url(Req=#http_req{transport=Transport, host=Host, port=Port}) ->
%% @doc Return the full request URL as a binary.
%%
%% The URL includes the scheme, host, port, path, query string and fragment.
-spec url(Req) -> {binary(), Req} when Req::req().
url(Req=#http_req{path=Path, qs=QS, fragment=Fragment}) ->
-spec url(Req) -> {undefined | binary(), Req} when Req::req().
url(Req=#http_req{}) ->
{HostURL, Req2} = host_url(Req),
url2(HostURL, Req2).
url2(undefined, Req=#http_req{}) ->
{undefined, Req};
url2(HostURL, Req=#http_req{path=Path, qs=QS, fragment=Fragment}) ->
QS2 = case QS of
<<>> -> <<>>;
_ -> << "?", QS/binary >>
@ -341,7 +348,7 @@ url(Req=#http_req{path=Path, qs=QS, fragment=Fragment}) ->
<<>> -> <<>>;
_ -> << "#", Fragment/binary >>
end,
{<< HostURL/binary, Path/binary, QS2/binary, Fragment2/binary >>, Req2}.
{<< HostURL/binary, Path/binary, QS2/binary, Fragment2/binary >>, Req}.
%% @equiv binding(Name, Req, undefined)
-spec binding(atom(), Req) -> {binary() | undefined, Req} when Req::req().
@ -1279,6 +1286,9 @@ status(B) when is_binary(B) -> B.
-ifdef(TEST).
url_test() ->
{undefined, _} =
url(#http_req{transport=ranch_tcp, host= <<>>, port= undefined,
path= <<>>, qs= <<>>, fragment= <<>>, pid=self()}),
{<<"http://localhost/path">>, _ } =
url(#http_req{transport=ranch_tcp, host= <<"localhost">>, port=80,
path= <<"/path">>, qs= <<>>, fragment= <<>>, pid=self()}),