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otpbp

7.6.0
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OTP backports

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Files

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otpbp src otpbp_http_uri.erl
Raw

src/otpbp_http_uri.erl

-module(otpbp_http_uri).
-ifndef(HAVE_http_uri__parse_1).
% OTP < 25.0
-export([parse/1]).
-endif.
-ifndef(HAVE_http_uri__parse_2).
% OTP < 25.0
-export([parse/2]).
-endif.
-ifndef(HAVE_http_uri__scheme_defaults_0).
% OTP < 25.0
-export([scheme_defaults/0]).
-endif.
-ifndef(HAVE_http_uri__parse_1).
-ifdef(HAVE_http_uri__parse_2).
-import(http_uri, [parse/2]).
-endif.
-endif.
-ifndef(HAVE_http_uri__parse_2).
-ifdef(HAVE_http_uri__scheme_defaults_0).
-import(http_uri, [scheme_defaults/0]).
-endif.
-endif.
-ifndef(HAVE_http_uri__parse_2).
parse(URI) -> parse(URI, []).
-endif.
-ifndef(HAVE_http_uri__parse_2).
parse(URI, Options) ->
case uri_string:parse(URI) of
#{scheme := S, host := H, port := P} = M -> parse(M, Options, scheme(S), H, P, S);
#{scheme := S, host := H} = M ->
Scheme = scheme(S),
case lists:keyfind(Scheme, 1, scheme_defaults(Options)) of
{_Scheme, P} -> parse(M, Options, Scheme, H, P, S);
false -> {error, {no_default_port, Scheme, URI}}
end;
#{scheme := S} -> {error, {malformed_url, scheme(S), URI}};
#{} -> {error, no_scheme};
{error, invalid_uri, _} -> {error, {malformed_url, scheme(protocol(URI)), URI}};
{error, _, _} -> {error, no_scheme}
end.
parse(M, Options, Scheme, H, P, S) ->
case lists:keyfind(scheme_validation_fun, 1, Options) of
{_scheme_validation_fun, Fun} when is_function(Fun) ->
case Fun(S) of
valid -> parse(M, Options, Scheme, H, P);
{error, _} = E -> E
end;
_ -> parse(M, Options, Scheme, H, P)
end.
parse(M, Options, Scheme, H, Port) ->
E = empty(H),
Host = host(H, Options),
#{path := P, query := Q, userinfo := U} = maps:merge(#{path => E, query => E, userinfo => E}, M),
Path = path(P),
Query = prefix(Q, $?),
{ok,
case lists:member({fragment, true}, Options) of
false -> {Scheme, U, Host, Port, Path, Query};
true ->
{Scheme, U, Host, Port, Path, Query,
case M of
#{fragment := F} -> fragment(F);
_ -> E
end}
end}.
-compile({inline, prefix/2}).
prefix([_|_] = S, C) -> [C|S];
prefix(S, C) when byte_size(S) =/= 0 -> <<C, S/binary>>;
prefix(S, _) -> S.
scheme(S) when is_list(S) -> list_to_atom(S);
scheme(S) when is_binary(S) -> binary_to_atom(S, latin1).
-compile({inline, path/1}).
path("") -> "/";
path(<<>>) -> <<$/>>;
path(S) -> S.
-compile({inline, fragment/1}).
fragment(F) when is_list(F) -> [$#|F];
fragment(F) when is_binary(F) -> <<$#, F/binary>>.
-compile({inline, host/2}).
host(H, Options) ->
case lists:member({ipv6_host_with_brackets, true}, Options) of
false -> H;
true -> ipv6(H)
end.
-compile({inline, ipv6/1}).
ipv6(H) when is_list(H) ->
case string:chr(H, $:) of
0 -> H;
_ -> [$[|H ++ "]"]
end;
ipv6(H) when is_binary(H) ->
case binary:match(H, <<$:>>) of
nomatch -> H;
_ -> <<$[, H/binary, $]>>
end.
-compile({inline, protocol/1}).
protocol(URI) when is_list(URI) -> string:sub_word(URI, 1, $:);
protocol(URI) when is_binary(URI) ->
{I, _} = binary:match(URI, <<$:>>),
binary:part(URI, 0, I).
-compile({inline, scheme_defaults/1}).
scheme_defaults(Options) ->
case lists:keyfind(scheme_defaults, 1, Options) of
false -> scheme_defaults();
{_scheme_defaults, SD} -> SD
end.
-compile({inline, empty/1}).
empty(URI) when is_list(URI) -> "";
empty(URI) when is_binary(URI) -> <<>>.
-endif.
-ifndef(HAVE_http_uri__scheme_defaults_0).
scheme_defaults() -> [{http, 80}, {https, 443}, {ftp, 21}, {ssh, 22}, {sftp, 22}, {tftp, 69}].
-endif.