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hackney_http_connect.erl
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hackney_http_connect.erl
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%%% -*- erlang -*-
%%%
%%% This file is part of hackney released under the Apache 2 license.
%%% See the NOTICE for more information.
%%%
%%% Copyright (c) 2012-2014 Benoît Chesneau <benoitc@e-engura.org>
%%%
%%%
-module(hackney_http_connect).
-export([messages/1,
connect/3, connect/4,
recv/2, recv/3,
send/2,
setopts/2,
controlling_process/2,
peername/1,
close/1,
shutdown/2,
sockname/1]).
-define(TIMEOUT, infinity).
-type http_socket() :: {atom(), inet:socket()}.
-export_type([http_socket/0]).
-ifdef(no_proxy_sni_support).
ssl_opts(Host, Opts) ->
hackney_connect:ssl_opts(Host, Opts).
-else.
ssl_opts(Host, Opts) ->
[{server_name_indication, Host} | hackney_connect:ssl_opts(Host,Opts)].
-endif.
%% @doc Atoms used to identify messages in {active, once | true} mode.
messages({hackney_ssl, _}) ->
{ssl, ssl_closed, ssl_error};
messages({_, _}) ->
{tcp, tcp_closed, tcp_error}.
connect(ProxyHost, ProxyPort, Opts) ->
connect(ProxyHost, ProxyPort, Opts, infinity).
connect(ProxyHost, ProxyPort, Opts, Timeout)
when is_list(ProxyHost), is_integer(ProxyPort),
(Timeout =:= infinity orelse is_integer(Timeout)) ->
%% get the host and port to connect from the options
Host = proplists:get_value(connect_host, Opts),
Port = proplists:get_value(connect_port, Opts),
Transport = proplists:get_value(connect_transport, Opts),
%% filter connection options
AcceptedOpts = [linger, nodelay, send_timeout,
send_timeout_close, raw, inet6],
BaseOpts = [binary, {active, false}, {packet, 0}, {keepalive, true},
{nodelay, true}],
ConnectOpts = hackney_util:filter_options(Opts, AcceptedOpts, BaseOpts),
%% connnect to the proxy, and upgrade the socket if needed.
case gen_tcp:connect(ProxyHost, ProxyPort, ConnectOpts) of
{ok, Socket} ->
case do_handshake(Socket, Host, Port, Opts) of
ok ->
%% if we are connecting to a remote https source, we
%% upgrade the connection socket to handle SSL.
case Transport of
hackney_ssl ->
SSLOpts = ssl_opts(Host, Opts),
%% upgrade the tcp connection
case ssl:connect(Socket, SSLOpts) of
{ok, SslSocket} ->
{ok, {Transport, SslSocket}};
Error ->
gen_tcp:close(Socket),
Error
end;
_ ->
{ok, {Transport, Socket}}
end;
Error ->
gen_tcp:close(Socket),
Error
end;
Error ->
Error
end.
recv(Socket, Length) ->
recv(Socket, Length, infinity).
%% @doc Receive a packet from a socket in passive mode.
%% @see gen_tcp:recv/3
-spec recv(http_socket(), non_neg_integer(), timeout())
-> {ok, any()} | {error, closed | atom()}.
recv({Transport, Socket}, Length, Timeout) ->
Transport:recv(Socket, Length, Timeout).
%% @doc Send a packet on a socket.
%% @see gen_tcp:send/2
-spec send(http_socket(), iolist()) -> ok | {error, atom()}.
send({Transport, Socket}, Packet) ->
Transport:send(Socket, Packet).
%% @doc Set one or more options for a socket.
%% @see inet:setopts/2
-spec setopts(http_socket(), list()) -> ok | {error, atom()}.
setopts({Transport, Socket}, Opts) ->
Transport:setopts(Socket, Opts).
%% @doc Assign a new controlling process <em>Pid</em> to <em>Socket</em>.
%% @see gen_tcp:controlling_process/2
-spec controlling_process(http_socket(), pid())
-> ok | {error, closed | not_owner | atom()}.
controlling_process({Transport, Socket}, Pid) ->
Transport:controlling_process(Socket, Pid).
%% @doc Return the address and port for the other end of a connection.
%% @see inet:peername/1
-spec peername(http_socket())
-> {ok, {inet:ip_address(), inet:port_number()}} | {error, atom()}.
peername({Transport, Socket}) ->
Transport:peername(Socket).
%% @doc Close a socks5 socket.
%% @see gen_tcp:close/1
-spec close(http_socket()) -> ok.
close({Transport, Socket}) ->
Transport:close(Socket).
%% @doc Immediately close a socket in one or two directions.
%% @see gen_tcp:shutdown/2
-spec shutdown(http_socket(), read | write | read_write) -> ok.
shutdown({Transport, Socket}, How) ->
Transport:shutdown(Socket, How).
%% @doc Get the local address and port of a socket
%% @see inet:sockname/1
-spec sockname(http_socket())
-> {ok, {inet:ip_address(), inet:port_number()}} | {error, atom()}.
sockname({Transport, Socket}) ->
Transport:sockname(Socket).
%% private functions
do_handshake(Socket, Host, Port, Options) ->
ProxyUser = proplists:get_value(connect_user, Options),
ProxyPass = proplists:get_value(connect_pass, Options, <<>>),
ProxyPort = proplists:get_value(connect_port, Options),
%% set defaults headers
HostHdr = case ProxyPort of
80 ->
list_to_binary(Host);
_ ->
iolist_to_binary([Host, ":", integer_to_list(Port)])
end,
UA = hackney_request:default_ua(),
Headers0 = [<<"Host: ", HostHdr/binary>>,
<<"User-Agent: ", UA/binary >>],
Headers = case ProxyUser of
undefined ->
Headers0;
_ ->
Credentials = base64:encode(<<ProxyUser/binary, ":",
ProxyPass/binary>>),
Headers0 ++ [<< "Proxy-Authorization: Basic ", Credentials/binary >>]
end,
Path = iolist_to_binary([Host, ":", integer_to_list(Port)]),
Payload = [<< "CONNECT ", Path/binary, " HTTP/1.1", "\r\n" >>,
hackney_bstr:join(lists:reverse(Headers), <<"\r\n">>),
<<"\r\n\r\n">>],
case gen_tcp:send(Socket, Payload) of
ok ->
check_response(Socket);
Error ->
Error
end.
check_response(Socket) ->
case gen_tcp:recv(Socket, 0, ?TIMEOUT) of
{ok, Data} ->
check_status(Data);
Error ->
Error
end.
check_status(<< "HTTP/1.1 200", _/bits >>) ->
ok;
check_status(<< "HTTP/1.1 201", _/bits >>) ->
ok;
check_status(<< "HTTP/1.0 200", _/bits >>) ->
ok;
check_status(<< "HTTP/1.0 201", _/bits >>) ->
ok;
check_status(Else) ->
error_logger:error_msg("proxy error: ~w~n", [Else]),
{error, proxy_error}.