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http_get.erl
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http_get.erl
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%=================================================================================
-module(http_get).
-compile(export_all).
-include("http_get.hrl").
%-compile(native).
%-compile(inline).
% -compile({inline_size,1000}).
% -compile({inline_effort,2000}).
% -compile({inline_unroll,6}).
%=================================================================================
main([URL])->
send_request( list_to_binary(URL) , 0 );
main(_)->
io:format(bye).
%=================================================================================
send_request( <<"https://",_/binary>> = UB , _ )->
os:cmd(?CURLGET(UB) ) ;
send_request(UB , 0 )->
[ _ , TB ] = binary:split(UB, <<"http://">>) ,
[ HB | _ ] = binary:split( TB , <<"/">>),
send_request(UB , HB );
send_request(UB , HB )->
case gen_tcp:connect( btos(HB) , 80 , ?TCP_CONN_OPTS , 10000 ) of
{ ok , Sock }->
do_send_request(Sock , UB , HB ) ;
Err->
?PRN( {HB,Err} )
end.
%=================================================================================
do_send_request( Sock , <<"http://", More_bin/binary>> , Host )->
case binary:split(More_bin , <<"/">>) of
[_ , P0]->
Path = ["/" , P0] ;
[_ ]->
Path = "/"
end ,
Request = ?REQUEST11(Path,Host) ,
ok =gen_tcp:send( Sock , Request ),
Rep_bin = receive_reply( Sock , <<>> ) ,
case re:run(Rep_bin , "\r\nLocation ?: ?(https?://([^/\r\n]*).*)\r\n" , ?REGEX_CAP_ALL ) of
{ match , [ _ , Loc , Host ]} ->
do_send_request( Sock , Loc , Host ) ;
{ match , [ _ , Loc , Host_new ]} ->
gen_tcp:close(Sock),
send_request( Loc , Host_new );
nomatch->
gen_tcp:close(Sock) ,
process_reply(Rep_bin)
end .
%=================================================================================
receive_reply(S , Acc_bin )->
receive
{ tcp , S , BB}->
Rep_bin = iolist_to_binary([Acc_bin,BB]) ,
case is_reply_complete(Rep_bin) of
true->
Rep_bin;
_->
receive_reply(S , Rep_bin )
end;
_->
Acc_bin
end.
%=================================================================================
is_reply_complete(Rep_bin)->
case re:run(Rep_bin , "\r\ncontent-length ?: ?([0-9]+)\r\n" , ?REGEX_CAP_ALL ) of
nomatch->
(match == re:run(Rep_bin , "\r\ntransfer-encoding ?: ?.*chunked.*\r\n" , ?REGEX_CAP_NONE ))
and
( match == re:run( Rep_bin , "\r\n0+\r\n\r\n$" , ?REGEX_CAP_NONE ) ) ;
{match,[_,CLB]}->
Cont_len = binary_to_integer( CLB ) ,
case binary:split(Rep_bin , <<"\r\n\r\n">> ) of
[_HDRS , Body]->
size(Body)==Cont_len;
_->
false
end
end.
%=================================================================================
dechunkify(<<>>)->
[];
dechunkify(BB) when is_binary(BB)->
[ Len_bin , Temp_bin ] = binary:split(BB , <<"\r\n">>) ,
Len = binary_to_integer(Len_bin,16) ,
<< Chunk:Len/binary , "\r\n" , BB_new/binary>> = Temp_bin ,
[ Chunk | dechunkify(BB_new) ] ;
dechunkify([BB])->
dechunkify(BB).
%=================================================================================
btos(Bin)->
binary_to_list(Bin).
%=================================================================================
process_reply(Rep_bin)->
[Hdrs | Maybe_chnked] = binary:split(Rep_bin, ?CRLFCRLF ) ,
Maybe_gz=
case re:run(Hdrs , "\r\ntransfer-encoding ?: ?.*chunked.*\r\n" , ?REGEX_CAP_NONE ) of
match->
dechunkify(Maybe_chnked) ;
_->
Maybe_chnked
end,
try zlib:gunzip(Maybe_gz) of
Body->
io:format(Body)
catch
error:data_error->
io:format(Maybe_gz)
end.
%=================================================================================
%
% redirect(Rep_bin , HB , Sock)->
% case re:run(Rep_bin , "\r\nLocation ?: ?(https?://([^/\r\n]*).*)\r\n" , ?REGEX_CAP_ALL ) of
% {match,[_ , UB1 , HB ]} ->
% send_request( Sock , UB1 , HB ) ;
% {match,[_ , UB1 , _HB1 ]} ->
% gen_tcp:close(Sock),
% connect_to_host(UB1);
% nomatch->
% gen_tcp:close(Sock)
% end .
%
%=================================================================================
%
% send_request( Sock , <<"http://", More_bin/binary>> , HB )->
% case binary:split(More_bin , <<"/">>) of
% [_ , P0]->
% Path_bin = <<"/" , P0/binary>>;
% [_ ]->
% Path_bin = <<"/">>
% end ,
% Req_bin = iolist_to_binary( ?REQUEST11(Path_bin,HB) ) ,
% gen_tcp:send( Sock , Req_bin ),
% Rep_bin = receive_reply( Sock , <<>> ) ,
% case re:run( Rep_bin , "HTTP/(1\.1|1\.0|0\.9) 200 " , ?REGEX_CAP_NONE ) of
% match->
% gen_tcp:close(Sock) ,
% process_reply(Rep_bin) ;
% nomatch->
% redirect(Rep_bin , HB , Sock)
% end ;
% send_request(S,_Url_bin,_HB)->
% gen_tcp:close(S) .
% %os:cmd( ?CURLGET(Url_bin,HB)).
%
%=================================================================================
%=================================================================================
%=================================================================================