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author | Péter Dimitrov <[email protected]> | 2017-11-10 15:47:35 +0100 |
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committer | Péter Dimitrov <[email protected]> | 2017-11-15 16:07:51 +0100 |
commit | 7b1a9e6086588afa7840198bd01b4510581e7cdd (patch) | |
tree | 0a2fd05bb92afcc598f6d0bc571ad4bd80f4b110 /lib/inets/src/http_client/httpc_response.erl | |
parent | 6db8210068a55696cd5e444d40d3676737113d03 (diff) | |
download | otp-7b1a9e6086588afa7840198bd01b4510581e7cdd.tar.gz otp-7b1a9e6086588afa7840198bd01b4510581e7cdd.tar.bz2 otp-7b1a9e6086588afa7840198bd01b4510581e7cdd.zip |
inets: Add support for URI-references in Location
RFC 2616 requires an absolute URI in 'Location' header field for
redirects. RFC 7231 obsoleted RFC 2616 and allows URI-references.
Updated httpc_response to support URI-references, based on the
URI resolution algorithm defined by RFC 3986 (5.2.2. Transform
References).
Change-Id: I42227d32f458b6e7a60d55b40407c4092e69b222
Diffstat (limited to 'lib/inets/src/http_client/httpc_response.erl')
-rw-r--r-- | lib/inets/src/http_client/httpc_response.erl | 224 |
1 files changed, 162 insertions, 62 deletions
diff --git a/lib/inets/src/http_client/httpc_response.erl b/lib/inets/src/http_client/httpc_response.erl index 91638f5d2e..58ab9144df 100644 --- a/lib/inets/src/http_client/httpc_response.erl +++ b/lib/inets/src/http_client/httpc_response.erl @@ -190,7 +190,7 @@ parse_status_code(<<?CR, ?LF, Rest/binary>>, StatusCodeStr, MaxHeaderSize, Result, true) -> parse_headers(Rest, [], [], MaxHeaderSize, [" ", list_to_integer(lists:reverse( - string:strip(StatusCodeStr))) + string:trim(StatusCodeStr))) | Result], true); parse_status_code(<<?SP, Rest/binary>>, StatusCodeStr, @@ -377,58 +377,173 @@ status_server_error_50x(Response, Request) -> {stop, {Request#request.id, Msg}}. -redirect(Response = {StatusLine, Headers, Body}, Request) -> +redirect(Response = {_, Headers, _}, Request) -> {_, Data} = format_response(Response), case Headers#http_response_h.location of - undefined -> - transparent(Response, Request); - RedirUrl -> - UrlParseOpts = [{ipv6_host_with_brackets, - Request#request.ipv6_host_with_brackets}], - case uri_parse(RedirUrl, UrlParseOpts) of - {error, no_scheme} when - (Request#request.settings)#http_options.relaxed -> - NewLocation = fix_relative_uri(Request, RedirUrl), - redirect({StatusLine, Headers#http_response_h{ - location = NewLocation}, - Body}, Request); - {error, Reason} -> - {ok, error(Request, Reason), Data}; - %% Automatic redirection - {ok, {Scheme, _, Host, Port, Path, Query}} -> - HostPort = http_request:normalize_host(Scheme, Host, Port), - NewHeaders = - (Request#request.headers)#http_request_h{host = HostPort}, - NewRequest = - Request#request{redircount = - Request#request.redircount+1, - scheme = Scheme, - headers = NewHeaders, - address = {Host,Port}, - path = Path, - pquery = Query, - abs_uri = - atom_to_list(Scheme) ++ "://" ++ - Host ++ ":" ++ - integer_to_list(Port) ++ - Path ++ Query}, - {redirect, NewRequest, Data} - end + undefined -> + transparent(Response, Request); + RedirUrl -> + Brackets = Request#request.ipv6_host_with_brackets, + case uri_string:parse(RedirUrl) of + {error, Reason, _} -> + {ok, error(Request, Reason), Data}; + %% Automatic redirection + URI -> + {Host, Port0} = Request#request.address, + Port = maybe_to_integer(Port0), + Path = Request#request.path, + Scheme = atom_to_list(Request#request.scheme), + Query = Request#request.pquery, + URIMap = resolve_uri(Scheme, Host, Port, Path, Query, URI), + TScheme = list_to_atom(maps:get(scheme, URIMap)), + THost = http_util:maybe_add_brackets(maps:get(host, URIMap), Brackets), + TPort = maps:get(port, URIMap), + TPath = maps:get(path, URIMap), + TQuery = maps:get(query, URIMap, ""), + NewURI = uri_string:normalize( + uri_string:recompose(URIMap)), + HostPort = http_request:normalize_host(TScheme, THost, TPort), + NewHeaders = + (Request#request.headers)#http_request_h{host = HostPort}, + NewRequest = + Request#request{redircount = + Request#request.redircount+1, + scheme = TScheme, + headers = NewHeaders, + address = {THost,TPort}, + path = TPath, + pquery = TQuery, + abs_uri = NewURI}, + {redirect, NewRequest, Data} + end + end. + + +%% RFC3986 - 5.2.2. Transform References +resolve_uri(Scheme, Host, Port, Path, Query, URI) -> + resolve_uri(Scheme, Host, Port, Path, Query, URI, #{}). +%% +resolve_uri(Scheme, Host, Port, Path, Query, URI, Map0) -> + case maps:is_key(scheme, URI) of + true -> + Port = get_port(URI), + maybe_add_query( + Map0#{scheme => maps:get(scheme, URI), + host => maps:get(host, URI), + port => Port, + path => maps:get(path, URI)}, + URI); + false -> + Map = Map0#{scheme => Scheme}, + resolve_authority(Host, Port, Path, Query, URI, Map) + end. + + +get_port(URI) -> + Scheme = maps:get(scheme, URI), + case maps:get(port, URI, undefined) of + undefined -> + get_default_port(Scheme); + Port -> + Port + end. + + +get_default_port("http") -> + 80; +get_default_port("https") -> + 443. + + +resolve_authority(Host, Port, Path, Query, RelURI, Map) -> + case maps:is_key(host, RelURI) of + true -> + Port = get_port(RelURI), + maybe_add_query( + Map#{host => maps:get(host, RelURI), + port => Port, + path => maps:get(path, RelURI)}, + RelURI); + false -> + Map1 = Map#{host => Host, + port => Port}, + resolve_path(Path, Query, RelURI, Map1) + end. + + +maybe_add_query(Map, RelURI) -> + case maps:is_key(query, RelURI) of + true -> + Map#{query => maps:get(query, RelURI)}; + false -> + Map + end. + + +resolve_path(Path, Query, RelURI, Map) -> + case maps:is_key(path, RelURI) of + true -> + Path1 = calculate_path(Path, maps:get(path, RelURI)), + maybe_add_query( + Map#{path => Path1}, + RelURI); + false -> + Map1 = Map#{path => Path}, + resolve_query(Query, RelURI, Map1) + end. + + +calculate_path(BaseP, RelP) -> + case starts_with_slash(RelP) of + true -> + RelP; + false -> + merge_paths(BaseP, RelP) + end. + + +starts_with_slash([$/|_]) -> + true; +starts_with_slash(<<$/,_/binary>>) -> + true; +starts_with_slash(_) -> + false. + + +%% RFC3986 - 5.2.3. Merge Paths +merge_paths("", RelP) -> + [$/|RelP]; +merge_paths(BaseP, RelP) when is_list(BaseP) -> + do_merge_paths(lists:reverse(BaseP), RelP); +merge_paths(BaseP, RelP) when is_binary(BaseP) -> + B = binary_to_list(BaseP), + R = binary_to_list(RelP), + Res = merge_paths(B, R), + list_to_binary(Res). + + +do_merge_paths([$/|_] = L, RelP) -> + lists:reverse(L) ++ RelP; +do_merge_paths([_|T], RelP) -> + do_merge_paths(T, RelP). + + +resolve_query(Query, RelURI, Map) -> + case maps:is_key(query, RelURI) of + true -> + Map#{query => maps:get(query, RelURI)}; + false -> + Map#{query => Query} end. -maybe_to_list(Port) when is_integer(Port) -> - integer_to_list(Port); -maybe_to_list(Port) when is_list(Port) -> + +maybe_to_integer(Port) when is_list(Port) -> + {Port1, _} = string:to_integer(Port), + Port1; +maybe_to_integer(Port) when is_integer(Port) -> Port. -%%% Guessing that we received a relative URI, fix it to become an absoluteURI -fix_relative_uri(Request, RedirUrl) -> - {Server, Port0} = Request#request.address, - Port = maybe_to_list(Port0), - Path = Request#request.path, - atom_to_list(Request#request.scheme) ++ "://" ++ Server ++ ":" ++ Port - ++ Path ++ RedirUrl. - + error(#request{id = Id}, Reason) -> {Id, {error, Reason}}. @@ -478,18 +593,3 @@ format_response({StatusLine, Headers, Body}) -> {Body, <<>>} end, {{StatusLine, http_response:header_list(Headers), NewBody}, Data}. - -%%-------------------------------------------------------------------------- -%% These functions is just simple wrappers to parse specifically HTTP URIs -%%-------------------------------------------------------------------------- - -scheme_defaults() -> - [{http, 80}, {https, 443}]. - -uri_parse(URI, Opts) -> - http_uri:parse(URI, [{scheme_defaults, scheme_defaults()} | Opts]). - - -%%-------------------------------------------------------------------------- - - |