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Diffstat (limited to 'src/couch_inets/tftp_file.erl')
| -rw-r--r-- | src/couch_inets/tftp_file.erl | 338 |
1 files changed, 0 insertions, 338 deletions
diff --git a/src/couch_inets/tftp_file.erl b/src/couch_inets/tftp_file.erl deleted file mode 100644 index 03e54047..00000000 --- a/src/couch_inets/tftp_file.erl +++ /dev/null @@ -1,338 +0,0 @@ -%%%------------------------------------------------------------------- -%%% File : tft_file.erl -%%% Author : Hakan Mattsson <hakan@erix.ericsson.se> -%%% Description : -%%% -%%% Created : 24 May 2004 by Hakan Mattsson <hakan@erix.ericsson.se> -%%%------------------------------------------------------------------- - --module(tftp_file). - -%%%------------------------------------------------------------------- -%%% Interface -%%%------------------------------------------------------------------- - --behaviour(tftp). - --export([prepare/6, open/6, read/1, write/2, abort/3]). --export([prepare/5, open/5]). - -%%%------------------------------------------------------------------- -%%% Defines -%%%------------------------------------------------------------------- - --include_lib("kernel/include/file.hrl"). - --record(state, {access, - filename, - root_dir, - options, - blksize, - fd, - count, - buffer}). - -%%------------------------------------------------------------------- -%% prepare(Peer, Access, Filename, Mode, SuggestedOptions, InitialState) -> -%% {ok, AcceptedOptions, NewState} | {error, Code, Text} -%% -%% Peer = {PeerType, PeerHost, PeerPort} -%% PeerType = inet | inet6 -%% PeerHost = ip_address() -%% PeerPort = integer() -%% Acess = read | write -%% Filename = string() -%% Mode = string() -%% SuggestedOptions = [{Key, Value}] -%% AcceptedOptions = [{Key, Value}] -%% Key = string() -%% Value = string() -%% InitialState = [] | [{root_dir, string()}] -%% NewState = term() -%% Code = undef | enoent | eacces | enospc | -%% badop | eexist | baduser | badopt | -%% integer() -%% Text = string() -%% -%% Prepares open of a file on the client side. -%% -%% Will be followed by a call to open/4 before any read/write access -%% is performed. The AcceptedOptions will be sent to the server which -%% will reply with those options that it accepts. The options that are -%% accepted by the server will be forwarded to open/4 as SuggestedOptions. -%% -%% No new options may be added, but the ones that are present as -%% SuggestedOptions may be omitted or replaced with new values -%% in the AcceptedOptions. -%%------------------------------------------------------------------- - -prepare(_Peer, Access, Filename, Mode, SuggestedOptions, Initial) -> - %% Kept for backwards compatibility - prepare(Access, Filename, Mode, SuggestedOptions, Initial). - -prepare(Access, Filename, Mode, SuggestedOptions, Initial) when is_list(Initial) -> - %% Client side - case catch handle_options(Access, Filename, Mode, SuggestedOptions, Initial) of - {ok, Filename2, AcceptedOptions} -> - State = #state{access = Access, - filename = Filename2, - options = AcceptedOptions, - blksize = lookup_blksize(AcceptedOptions), - count = 0, - buffer = []}, - {ok, AcceptedOptions, State}; - {error, {Code, Text}} -> - {error, {Code, Text}} - end. - -%% --------------------------------------------------------- -%% open(Peer, Access, Filename, Mode, SuggestedOptions, State) -> -%% {ok, AcceptedOptions, NewState} | {error, Code, Text} -%% -%% Peer = {PeerType, PeerHost, PeerPort} -%% PeerType = inet | inet6 -%% PeerHost = ip_address() -%% PeerPort = integer() -%% Acess = read | write -%% Filename = string() -%% Mode = string() -%% SuggestedOptions = [{Key, Value}] -%% AcceptedOptions = [{Key, Value}] -%% Key = string() -%% Value = string() -%% State = InitialState | #state{} -%% InitialState = [] | [{root_dir, string()}] -%% NewState = term() -%% Code = undef | enoent | eacces | enospc | -%% badop | eexist | baduser | badopt | -%% integer() -%% Text = string() -%% -%% Opens a file for read or write access. -%% -%% On the client side where the open/4 call has been preceeded by a -%% call to prepare/4, all options must be accepted or rejected. -%% On the server side, where there are no preceeding prepare/4 call, -%% noo new options may be added, but the ones that are present as -%% SuggestedOptions may be omitted or replaced with new values -%% in the AcceptedOptions. -%%------------------------------------------------------------------- - -open(_Peer, Access, Filename, Mode, SuggestedOptions, Initial) -> - %% Kept for backwards compatibility - open(Access, Filename, Mode, SuggestedOptions, Initial). - -open(Access, Filename, Mode, SuggestedOptions, Initial) when is_list(Initial) -> - %% Server side - case prepare(Access, Filename, Mode, SuggestedOptions, Initial) of - {ok, AcceptedOptions, State} -> - open(Access, Filename, Mode, AcceptedOptions, State); - {error, {Code, Text}} -> - {error, {Code, Text}} - end; -open(Access, Filename, Mode, NegotiatedOptions, State) when is_record(State, state) -> - %% Both sides - case catch handle_options(Access, Filename, Mode, NegotiatedOptions, State) of - {ok, _Filename2, Options} - when Options =:= NegotiatedOptions -> - do_open(State); - {error, {Code, Text}} -> - {error, {Code, Text}} - end. - -do_open(State) when is_record(State, state) -> - case file:open(State#state.filename, file_options(State)) of - {ok, Fd} -> - {ok, State#state.options, State#state{fd = Fd}}; - {error, Reason} when is_atom(Reason) -> - {error, file_error(Reason)} - end. - -file_options(State) -> - case State#state.access of - read -> [read, read_ahead, raw, binary]; - write -> [write, delayed_write, raw, binary] - end. - -file_error(Reason) when is_atom(Reason) -> - Details = file:format_error(Reason), - case Reason of - eexist -> {Reason, Details}; - enoent -> {Reason, Details}; - eacces -> {Reason, Details}; - eperm -> {eacces, Details}; - enospc -> {Reason, Details}; - _ -> {undef, Details ++ " (" ++ atom_to_list(Reason) ++ ")"} - end. - -%%------------------------------------------------------------------- -%% read(State) -> -%% {more, Bin, NewState} | {last, Bin, FileSize} | {error, {Code, Text}} -%% -%% State = term() -%% NewState = term() -%% Bin = binary() -%% FileSize = integer() -%% Code = undef | enoent | eacces | enospc | -%% badop | eexist | baduser | badopt | -%% integer() -%% Text = string() -%% -%% Reads a chunk from the file -%% -%% The file is automatically closed when the last chunk is read. -%%------------------------------------------------------------------- - -read(#state{access = read} = State) -> - BlkSize = State#state.blksize, - case file:read(State#state.fd, BlkSize) of - {ok, Bin} when is_binary(Bin), size(Bin) =:= BlkSize -> - Count = State#state.count + size(Bin), - {more, Bin, State#state{count = Count}}; - {ok, Bin} when is_binary(Bin), size(Bin) < BlkSize -> - file:close(State#state.fd), - Count = State#state.count + size(Bin), - {last, Bin, Count}; - eof -> - {last, <<>>, State#state.count}; - {error, Reason} -> - file:close(State#state.fd), - {error, file_error(Reason)} - end. - -%%------------------------------------------------------------------- -%% write(Bin, State) -> -%% {more, NewState} | {last, FileSize} | {error, {Code, Text}} -%% -%% State = term() -%% NewState = term() -%% Bin = binary() -%% FileSize = integer() -%% Code = undef | enoent | eacces | enospc | -%% badop | eexist | baduser | badopt | -%% integer() -%% Text = string() -%% -%% Writes a chunk to the file -%% -%% The file is automatically closed when the last chunk is written -%%------------------------------------------------------------------- - -write(Bin, #state{access = write} = State) when is_binary(Bin) -> - Size = size(Bin), - BlkSize = State#state.blksize, - case file:write(State#state.fd, Bin) of - ok when Size =:= BlkSize-> - Count = State#state.count + Size, - {more, State#state{count = Count}}; - ok when Size < BlkSize-> - file:close(State#state.fd), - Count = State#state.count + Size, - {last, Count}; - {error, Reason} -> - file:close(State#state.fd), - file:delete(State#state.filename), - {error, file_error(Reason)} - end. - -%%------------------------------------------------------------------- -%% abort(Code, Text, State) -> ok -%% -%% State = term() -%% Code = undef | enoent | eacces | enospc | -%% badop | eexist | baduser | badopt | -%% badblk | integer() -%% Text = string() -%% -%% Aborts the file transfer -%%------------------------------------------------------------------- - -abort(_Code, _Text, #state{fd = Fd, access = Access} = State) -> - file:close(Fd), - case Access of - write -> - ok = file:delete(State#state.filename); - read -> - ok - end. - -%%------------------------------------------------------------------- -%% Process options -%%------------------------------------------------------------------- - -handle_options(Access, Filename, Mode, Options, InitialState) when Mode =:= "octet" -> - Filename2 = handle_filename(Filename, InitialState), - Options2 = do_handle_options(Access, Filename2, Options), - {ok, Filename2, Options2}; -handle_options(_Access, _Filename, Mode, _Options, _InitialState) -> - {error, {badop, "Illegal mode " ++ Mode}}. - -handle_filename(Filename, InitialState) when is_list(InitialState) -> - case lists:keysearch(root_dir, 1, InitialState) of - {value, {_, Dir}} -> - case catch filename_join(Dir, Filename) of - {'EXIT', _} -> - throw({error, {badop, "Internal error. root_dir is not a string"}}); - Filename2 -> - Filename2 - end; - false -> - Filename - end; -handle_filename(_Filename, State) when is_record(State, state) -> - State#state.filename. - -filename_join(Dir, Filename) -> - case filename:pathtype(Filename) of - absolute -> - [_ | RelFilename] = filename:split(Filename), - filename:join([Dir, RelFilename]); - _ -> - filename:join([Dir, Filename]) - end. - -do_handle_options(Access, Filename, [{Key, Val} | T]) -> - case Key of - "tsize" -> - case Access of - read when Val =:= "0" -> - case file:read_file_info(Filename) of - {ok, FI} -> - Tsize = integer_to_list(FI#file_info.size), - [{Key, Tsize} | do_handle_options(Access, Filename, T)]; - {error, _} -> - do_handle_options(Access, Filename, T) - end; - _ -> - handle_integer(Access, Filename, Key, Val, T, 0, infinity) - end; - "blksize" -> - handle_integer(Access, Filename, Key, Val, T, 8, 65464); - "timeout" -> - handle_integer(Access, Filename, Key, Val, T, 1, 255); - _ -> - do_handle_options(Access, Filename, T) - end; -do_handle_options(_Access, _Filename, []) -> - []. - - -handle_integer(Access, Filename, Key, Val, Options, Min, Max) -> - case catch list_to_integer(Val) of - {'EXIT', _} -> - do_handle_options(Access, Filename, Options); - Int when Int >= Min, Int =< Max -> - [{Key, Val} | do_handle_options(Access, Filename, Options)]; - Int when Int >= Min, Max =:= infinity -> - [{Key, Val} | do_handle_options(Access, Filename, Options)]; - _Int -> - throw({error, {badopt, "Illegal " ++ Key ++ " value " ++ Val}}) - end. - -lookup_blksize(Options) -> - case lists:keysearch("blksize", 1, Options) of - {value, {_, Val}} -> - list_to_integer(Val); - false -> - 512 - end. |