From 39de3072bcf9fdeec6d3faeb125924c401242205 Mon Sep 17 00:00:00 2001 From: Christopher Lenz Date: Tue, 15 Apr 2008 12:21:00 +0000 Subject: Merged mochiweb branch back into trunk. git-svn-id: https://svn.apache.org/repos/asf/incubator/couchdb/trunk@648222 13f79535-47bb-0310-9956-ffa450edef68 --- src/couch_inets/mod_responsecontrol.erl | 301 -------------------------------- 1 file changed, 301 deletions(-) delete mode 100644 src/couch_inets/mod_responsecontrol.erl (limited to 'src/couch_inets/mod_responsecontrol.erl') diff --git a/src/couch_inets/mod_responsecontrol.erl b/src/couch_inets/mod_responsecontrol.erl deleted file mode 100644 index b1a330b3..00000000 --- a/src/couch_inets/mod_responsecontrol.erl +++ /dev/null @@ -1,301 +0,0 @@ -%% ``The contents of this file are subject to the Erlang Public License, -%% Version 1.1, (the "License"); you may not use this file except in -%% compliance with the License. You should have received a copy of the -%% Erlang Public License along with this software. If not, it can be -%% retrieved via the world wide web at http://www.erlang.org/. -%% -%% Software distributed under the License is distributed on an "AS IS" -%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See -%% the License for the specific language governing rights and limitations -%% under the License. -%% -%% The Initial Developer of the Original Code is Ericsson Utvecklings AB. -%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings -%% AB. All Rights Reserved.'' -%% -%% $Id$ -%% - --module(mod_responsecontrol). --export([do/1]). - --include("httpd.hrl"). - -do(Info) -> - ?DEBUG("do -> response_control",[]), - case httpd_util:key1search(Info#mod.data,status) of - %% A status code has been generated! - {_StatusCode, _PhraseArgs, _Reason} -> - {proceed, Info#mod.data}; - %% No status code has been generated! - undefined -> - case httpd_util:key1search(Info#mod.data, response) of - %% No response has been generated! - undefined -> - case do_responsecontrol(Info) of - continue -> - {proceed, Info#mod.data}; - Response -> - {proceed,[Response | Info#mod.data]} - end; - %% A response has been generated or sent! - _Response -> - {proceed, Info#mod.data} - end - end. - -%%---------------------------------------------------------------------- -%%Control that the request header did not contians any limitations -%%wheather a response shall be createed or not -%%---------------------------------------------------------------------- -do_responsecontrol(Info) -> - ?DEBUG("do_response_control -> Request URI: ~p",[Info#mod.request_uri]), - Path = mod_alias:path(Info#mod.data, Info#mod.config_db, - Info#mod.request_uri), - case file:read_file_info(Path) of - {ok, FileInfo} -> - control(Path, Info, FileInfo); - _ -> - %% The requested asset is not a plain file and then it must - %% be generated everytime its requested - continue - end. - -%%---------------------------------------------------------------------- -%%Control the If-Match, If-None-Match, and If-Modified-Since -%%---------------------------------------------------------------------- - - -%% If a client sends more then one of the if-XXXX fields in a request -%% The standard says it does not specify the behaviuor so I specified it :-) -%% The priority between the fields is -%% 1.If-modified -%% 2.If-Unmodified -%% 3.If-Match -%% 4.If-Nomatch - -%% This means if more than one of the fields are in the request the -%% field with highest priority will be used - -%%If the request is a range request the If-Range field will be the winner. - -control(Path, Info, FileInfo) -> - case control_range(Path, Info, FileInfo) of - undefined -> - case control_Etag(Path, Info, FileInfo) of - undefined -> - case control_modification(Path, Info, FileInfo) of - continue -> - continue; - ReturnValue -> - send_return_value(ReturnValue, FileInfo) - end; - continue -> - continue; - ReturnValue -> - send_return_value(ReturnValue, FileInfo) - end; - Response-> - Response - end. - -%%---------------------------------------------------------------------- -%%If there are both a range and an if-range field control if -%%---------------------------------------------------------------------- -control_range(Path,Info,FileInfo) -> - case httpd_util:key1search(Info#mod.parsed_header, "range") of - undefined-> - undefined; - _Range -> - case httpd_util:key1search(Info#mod.parsed_header,"if-range") of - undefined -> - undefined; - EtagOrDate -> - control_if_range(Path,Info,FileInfo,EtagOrDate) - end - end. - -control_if_range(_Path, Info, FileInfo, EtagOrDate) -> - case httpd_util:convert_request_date(strip_date(EtagOrDate)) of - bad_date -> - FileEtag=httpd_util:create_etag(FileInfo), - case FileEtag of - EtagOrDate -> - continue; - _ -> - {if_range,send_file} - end; - _ErlDate -> - %%We got the date in the request if it is - case control_modification_data(Info, FileInfo#file_info.mtime, - "if-range") of - modified -> - {if_range,send_file}; - _UnmodifiedOrUndefined-> - continue - end - end. - -%%---------------------------------------------------------------------- -%%Controls the values of the If-Match and I-None-Mtch -%%---------------------------------------------------------------------- -control_Etag(Path, Info, FileInfo)-> - FileEtag = httpd_util:create_etag(FileInfo), - %%Control if the E-Tag for the resource matches one of the Etags in - %%the -if-match header field - case control_match(Info, FileInfo, "if-match", FileEtag) of - nomatch -> - %%None of the Etags in the if-match field matched the current - %%Etag for the resource return a 304 - {412, Info, Path}; - match -> - continue; - undefined -> - case control_match(Info, FileInfo, "if-none-match", FileEtag) of - nomatch -> - continue; - match -> - case Info#mod.method of - "GET" -> - {304, Info, Path}; - "HEAD" -> - {304, Info, Path}; - _OtherrequestMethod -> - {412, Info, Path} - end; - undefined -> - undefined - end - end. - -%%---------------------------------------------------------------------- -%%Control if there are any Etags for HeaderField in the request if so -%%Control if they match the Etag for the requested file -%%---------------------------------------------------------------------- -control_match(Info, _FileInfo, HeaderField, FileEtag)-> - case split_etags(httpd_util:key1search(Info#mod.parsed_header, - HeaderField)) of - undefined-> - undefined; - Etags-> - %%Control that the match any star not is availible - case lists:member("*",Etags) of - true-> - match; - false-> - compare_etags(FileEtag, Etags) - end - end. - -%%---------------------------------------------------------------------- -%%Split the etags from the request -%%---------------------------------------------------------------------- -split_etags(undefined)-> - undefined; -split_etags(Tags) -> - string:tokens(Tags,", "). - -%%---------------------------------------------------------------------- -%%Control if the etag for the file is in the list -%%---------------------------------------------------------------------- -compare_etags(Tag,Etags) -> - case lists:member(Tag,Etags) of - true -> - match; - _ -> - nomatch - end. - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% %% -%%Control if the file is modificated %% -%% %% -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% - -%%---------------------------------------------------------------------- -%%Control the If-Modified-Since and If-Not-Modified-Since header fields -%%---------------------------------------------------------------------- -control_modification(Path,Info,FileInfo)-> - ?DEBUG("control_modification() -> entry",[]), - case control_modification_data(Info, - FileInfo#file_info.mtime, - "if-modified-since") of - modified-> - continue; - unmodified-> - {304, Info, Path}; - undefined -> - case control_modification_data(Info, - FileInfo#file_info.mtime, - "if-unmodified-since") of - modified -> - {412, Info, Path}; - _ContinueUndefined -> - continue - end - end. - -%%---------------------------------------------------------------------- -%%Controls the date from the http-request if-modified-since and -%%if-not-modified-since against the modification data of the -%%File -%%---------------------------------------------------------------------- -%%Info is the record about the request -%%ModificationTime is the time the file was edited last -%%Header Field is the name of the field to control - -control_modification_data(Info, ModificationTime, HeaderField)-> - case strip_date(httpd_util:key1search(Info#mod.parsed_header, - HeaderField)) of - undefined-> - undefined; - LastModified0 -> - LastModified = calendar:universal_time_to_local_time( - httpd_util:convert_request_date(LastModified0)), - ?DEBUG("control_modification_data() -> " - "~n Request-Field: ~s" - "~n FileLastModified: ~p" - "~n FieldValue: ~p", - [HeaderField, ModificationTime, LastModified]), - FileTime = - calendar:datetime_to_gregorian_seconds(ModificationTime), - FieldTime = calendar:datetime_to_gregorian_seconds(LastModified), - if - FileTime =< FieldTime -> - ?DEBUG("File unmodified~n", []), unmodified; - FileTime >= FieldTime -> - ?DEBUG("File modified~n", []), modified - end - end. - -%% IE4 & NS4 sends an extra '; length=xxxx' string at the end of the If-Modified-Since -%% header, we detect this and ignore it (the RFCs does not mention this). -strip_date(undefined) -> - undefined; -strip_date([]) -> - []; -strip_date([$;,$ | _]) -> - []; -strip_date([C | Rest]) -> - [C | strip_date(Rest)]. - -send_return_value({412,_,_}, _FileInfo)-> - {status,{412,none,"Precondition Failed"}}; - -send_return_value({304,Info,Path}, FileInfo)-> - Suffix = httpd_util:suffix(Path), - MimeType = httpd_util:lookup_mime_default(Info#mod.config_db,Suffix, - "text/plain"), - LastModified = - case (catch httpd_util:rfc1123_date(FileInfo#file_info.mtime)) of - Date when is_list(Date) -> - [{last_modified, Date}]; - _ -> %% This will rarly happen, but could happen - %% if a computer is wrongly configured. - [] - end, - - Header = [{code,304}, - {etag, httpd_util:create_etag(FileInfo)}, - {content_length,"0"}, {mime_type, MimeType} | LastModified], - {response, {response, Header, nobody}}. -- cgit v1.2.3