From 544a38dd45f6a58d34296c6c768afd086eb2ac70 Mon Sep 17 00:00:00 2001 From: Christopher Lenz Date: Fri, 28 Mar 2008 23:32:19 +0000 Subject: Imported trunk. git-svn-id: https://svn.apache.org/repos/asf/incubator/couchdb/trunk@642432 13f79535-47bb-0310-9956-ffa450edef68 --- src/couch_inets/mod_browser.erl | 247 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 247 insertions(+) create mode 100644 src/couch_inets/mod_browser.erl (limited to 'src/couch_inets/mod_browser.erl') diff --git a/src/couch_inets/mod_browser.erl b/src/couch_inets/mod_browser.erl new file mode 100644 index 00000000..03eb66bb --- /dev/null +++ b/src/couch_inets/mod_browser.erl @@ -0,0 +1,247 @@ +%% ``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.'' +%% +%% $Id$ +%% +%% ---------------------------------------------------------------------- +%% +%% Browsers sends a string to the webbserver +%% to identify themsevles. They are a bit nasty +%% since the only thing that the specification really +%% is strict about is that they shall be short +%% some axamples: +%% +%% Netscape Mozilla/4.75 [en] (X11; U; SunOS 5.8 sun4u) +%% Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0 +%% Mozilla Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.1) Gecko/20020827 +%% Safari Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en-us) AppleWebKit/85 (KHTML, like Gecko) Safari/85 +%% IE5 Mozilla/4.0 (compatible; MSIE 5.0; SP1B; SunOS 5.8 sun4u; X11) +%% Lynx Lynx/2.8.3rel.1 libwww-FM/2.142 +%% +%% ---------------------------------------------------------------------- + +-module(mod_browser). + +-export([do/1, test/0, getBrowser/1]). + +%% Remember that the order of the mozilla browsers are +%% important since some browsers include others to behave +%% as they were something else +-define(MOZILLA_BROWSERS,[{netscape, "netscape"}, + {opera, "opera"}, + {msie, "msie"}, + {safari, "safari"}, + {mozilla, "rv:"}]). % fallback, must be last + + +%% If your operatingsystem is not recognized add it to this list. +-define(OPERATIVE_SYSTEMS,[{win3x, ["win16", "windows 3", "windows 16-bit"]}, + {win95, ["win95", "windows 95"]}, + {win98, ["win98", "windows 98"]}, + {winnt, ["winnt", "windows nt"]}, + {win2k, ["nt 5"]}, + {sunos4, ["sunos 4"]}, + {sunos5, ["sunos 5"]}, + {sun, ["sunos"]}, + {aix, ["aix"]}, + {linux, ["linux"]}, + {sco, ["sco", "unix_sv"]}, + {freebsd,["freebsd"]}, + {bsd, ["bsd"]}, + {macosx, ["mac os x"]}]). + +-define(LYNX, lynx). +-define(MOZILLA, mozilla). +-define(EMACS, emacs). +-define(STAROFFICE, soffice). +-define(MOSAIC, mosaic). +-define(NETSCAPE, netscape). +-define(SAFARU, safari). +-define(UNKOWN, unknown). + +-include("httpd.hrl"). + +-define(VMODULE,"BROWSER"). + +do(Info) -> + case httpd_util:key1search(Info#mod.data,status) of + {_StatusCode, _PhraseArgs, _Reason} -> + {proceed,Info#mod.data}; + undefined -> + Browser = getBrowser1(Info), + {proceed,[{'user-agent', Browser}|Info#mod.data]} + end. + +getBrowser1(Info) -> + PHead = Info#mod.parsed_header, + case httpd_util:key1search(PHead,"user-agent") of + undefined -> + undefined; + AgentString -> + getBrowser(AgentString) + end. + +getBrowser(AgentString) -> + LAgentString = http_util:to_lower(AgentString), + case regexp:first_match(LAgentString,"^[^ ]*") of + {match,Start,Length} -> + Browser = lists:sublist(LAgentString,Start,Length), + case browserType(Browser) of + {mozilla,Vsn} -> + {getMozilla(LAgentString, + ?MOZILLA_BROWSERS,{?NETSCAPE,Vsn}), + operativeSystem(LAgentString)}; + AnyBrowser -> + {AnyBrowser,operativeSystem(LAgentString)} + end; + nomatch -> + browserType(LAgentString) + end. + +browserType([$l,$y,$n,$x|Version]) -> + {?LYNX,browserVersion(Version)}; +browserType([$m,$o,$z,$i,$l,$l,$a|Version]) -> + {?MOZILLA,browserVersion(Version)}; +browserType([$e,$m,$a,$c,$s|Version]) -> + {?EMACS,browserVersion(Version)}; +browserType([$s,$t,$a,$r,$o,$f,$f,$i,$c,$e|Version]) -> + {?STAROFFICE,browserVersion(Version)}; +browserType([$m,$o,$s,$a,$i,$c|Version]) -> + {?MOSAIC,browserVersion(Version)}; +browserType(_Unknown) -> + unknown. + + +browserVersion([$/|VsnString]) -> + case catch list_to_float(VsnString) of + Number when float(Number) -> + Number; + _Whatever -> + case string:span(VsnString,"1234567890.") of + 0 -> + unknown; + VLength -> + Vsn = string:substr(VsnString,1,VLength), + case string:tokens(Vsn,".") of + [Number] -> + list_to_float(Number++".0"); + [Major,Minor|_MinorMinor] -> + list_to_float(Major++"."++Minor) + end + end + end; +browserVersion(VsnString) -> + browserVersion([$/|VsnString]). + +operativeSystem(OpString) -> + operativeSystem(OpString, ?OPERATIVE_SYSTEMS). + +operativeSystem(_OpString,[]) -> + unknown; +operativeSystem(OpString,[{RetVal,RegExps}|Rest]) -> + case controlOperativeSystem(OpString,RegExps) of + true -> + RetVal; + _ -> + operativeSystem(OpString,Rest) + end. + +controlOperativeSystem(_OpString,[]) -> + false; +controlOperativeSystem(OpString,[Regexp|Regexps]) -> + case regexp:match(OpString,Regexp) of + {match,_,_} -> + true; + nomatch -> + controlOperativeSystem(OpString,Regexps) + end. + + +%% OK this is ugly but thats the only way since +%% all browsers dont conform to the name/vsn standard +%% First we check if it is one of the browsers that +%% are not the default mozillaborwser against the regexp +%% for the different browsers. if no match, it is a mozilla +%% browser i.e opera, netscape, ie or safari + +getMozilla(_AgentString,[],Default) -> + Default; +getMozilla(AgentString,[{Agent,AgentRegExp}|Rest],Default) -> + case regexp:match(AgentString,AgentRegExp) of + {match,_,_} -> + {Agent,getMozVersion(AgentString,AgentRegExp)}; + nomatch -> + getMozilla(AgentString,Rest,Default) + end. + +getMozVersion(AgentString, AgentRegExp) -> + case regexp:match(AgentString,AgentRegExp++"[0-9\.\ \/]*") of + {match,Start,Length} when length(AgentRegExp) < Length -> + %% Ok we got the number split it out + RealStart = Start+length(AgentRegExp), + RealLength = Length-length(AgentRegExp), + VsnString = string:substr(AgentString,RealStart,RealLength), + %% case string:strip(VsnString,both,$\ ) of + case strip(VsnString) of + [] -> + unknown; + [Y1,Y2,Y3,Y4,M1,M2,D1,D2] = DateVsn when + Y1 =< $9, Y1 >= $0, + Y2 =< $9, Y2 >= $0, + Y3 =< $9, Y3 >= $0, + Y4 =< $9, Y4 >= $0, + M1 =< $9, M1 >= $0, + M2 =< $9, M2 >= $0, + D1 =< $9, D1 >= $0, + D2 =< $9, D2 >= $0 -> + list_to_integer(DateVsn); + Vsn -> + case string:tokens(Vsn,".") of + [Number]-> + list_to_float(Number++".0"); + [Major,Minor|Rev] -> + V = lists:flatten([Major,".",Minor,Rev]), + list_to_float(V) + end + end; + nomatch -> + unknown + end. + +strip(VsnString) -> + strip2(strip1(VsnString)). + +strip1(VsnString) -> + string:strip(VsnString,both,$\ ). + +strip2(VsnString) -> + string:strip(VsnString,both,$/ ). + +test()-> + test("Mozilla/4.75 [en] (X11; U; SunOS 5.8 sun4u)"), + test("Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0"), + test("Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.1) Gecko/20020827"), + test("Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.4) Gecko/20020827"), + test("Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en-us) AppleWebKit/85 (KHTML, like Gecko) Safari/85"), + test("Mozilla/4.0 (compatible; MSIE 5.0; SP1B; SunOS 5.8 sun4u; X11)"), + test("Lynx/2.8.3rel.1 libwww-FM/2.142"), + ok. + +test(Str) -> + Browser = getBrowser(Str), + io:format("~n--------------------------------------------------------~n"), + io:format("~p",[Browser]), + io:format("~n--------------------------------------------------------~n"). + -- cgit v1.2.3